Employer of Record vs. independent contractor: how to choose


Contents
Key takeaways
- An Employer of Record is the legal employer and commercial intermediary for a workforce. In the arrangement described by a UK government report, it hires and pays the employee and handles the corresponding employer obligations; the client funds the salary and service fee.
- A contractor arrangement depends on the real working relationship. ILO guidance says that work and remuneration facts should guide an employment-relationship determination even when a contract uses a different label. Use local review to determine how those facts apply.
- Choose the arrangement after recording who directs the work, how independent the worker is in practice, the expected continuity of the role, and the legal question your team needs answered. In Great Britain, employment-rights status and tax status are separate systems.
- An EOR service agreement still needs a review of the client’s duties, records and escalation routes. Before signing, identify the parties, the day-to-day decision maker, the records each party keeps, the duties allocated in the agreement, and who owns an escalation.
| Decision area | Employer of Record arrangement | Independent contractor arrangement | Review point |
|---|---|---|---|
| Legal relationship | The EOR is the legal employer. | The arrangement must reflect the actual working relationship. | Identify the applicable status question. |
| Direction and autonomy | Record who directs the work each day. | Independence has to appear in how work is directed and delivered. | Review control, integration and continuity. |
| Administration | The EOR hires and pays the employee and handles corresponding employer obligations in its arrangement. | The contractor agreement sets the commercial terms for services. | Name the parties, records and operational owners. |
| Flexibility and cost | The client funds salary and a service fee. | The services agreement sets payment terms for the work. | Compare actual terms and scope; duration alone does not decide status. |
| Records and deliverables | The employment and service agreements should identify the parties and allocated duties. | The services agreement should record scope, deliverables and rights terms. | Check the rights chain as well as the work records. |
Start with the relationship, then choose the arrangement
The arrangement should follow the relationship your team plans to run. Record the work facts before comparing an Employer of Record with a contractor arrangement: a contract can set terms, but its label does not settle the status question on its own.
The decision sequence below gives that review an order. It starts with the work itself, then moves to the applicable local question and review before the team selects an arrangement and checks the documents that support it.

Record how the work will actually be done
Turn the planned role into a record that someone outside the hiring conversation can review. Capture the facts that describe the work, rather than relying on a job title or a standard contractor agreement:
- Direction and control. Who sets priorities, decides how the work is done, and supervises it day to day?
- Integration and personal service. Is the person part of the company’s ordinary operations, and must they personally perform the work?
- Commercial reality. Does the person provide services to the relevant market, invest in their own tools, and carry a real prospect of profit or loss?
- Continuity. Is the work defined around a project or expected to continue as an ongoing role?
- Relationship and remuneration. Which parties contract with each other, what does the agreement say, and how is the work paid for?
The ILO identifies control, integration, personal service, continuity and financial risk as possible indicators that national rules may define. For US federal employment-tax purposes, the IRS groups evidence into behavioural control, financial control and the relationship of the parties. Neither framework supplies a universal score. Review the facts under the law that applies to the engagement.
Treat a contractor arrangement as a decision to revisit when the work changes. If the company begins setting day-to-day direction, expects ongoing availability or moves the role closer to its core operations, bring the current facts to the person responsible for classification before the contract language falls behind reality.
— Mike Smirnov
Separate the legal questions that need answering
“Is this person a contractor?” is usually too broad a question to guide a decision. First identify what your team needs to determine: employment rights, employment tax, or another obligation that applies to the engagement. The answer may depend on the location and the purpose of the review.
Great Britain’s employment-status guidance distinguishes employment-rights status from tax status. A conclusion in one system does not automatically answer the other. A written contract is only part of the employment-rights assessment; a court or employment tribunal makes the final decision on that status.
Give the reviewer a clear brief alongside the fact record:
- the location of the engagement and the question the team needs answered;
- the planned working arrangements, remuneration and contracting parties;
- the documents already in use, including any contractor or service agreement; and
- any change in supervision, continuity or the role’s place in the business.
That framing avoids treating a contract label or a tax analysis as a universal answer. It also gives the business a record to revisit when the work changes.
What an Employer of Record does
An Employer of Record is an employment route for a company that needs to engage a worker in a location where it lacks a suitable employing entity. The arrangement changes the legal relationship around the role, so the team needs to identify each party and the documents that govern their responsibilities.
Where the Employer of Record sits in the relationship
A UK government report describes an Employer of Record as the legal employer of a workforce and a commercial intermediary. In the model it outlines, the EOR hires and pays the employee and handles the corresponding employer obligations. The client funds the salary and pays a service fee.
That creates a relationship with three distinct roles:
- The EOR is the legal employer under the employment arrangement.
- The client engages the EOR’s service and funds the employment cost and fee.
- The team member is hired and paid through the EOR arrangement.
Start with the documents that name those roles. The employment agreement, service agreement and working arrangements should make clear who contracts with whom and who makes decisions about the work each day. An EOR can provide an employment structure, but the actual agreements and local rules determine the duties that remain with each party.
What the client still needs to establish
An EOR arrangement needs a review of the client’s role alongside the provider’s role. A UK government report cautions that risk can remain with the ultimate engager, including possible taxable presence arising from work carried out on its behalf. The service does not create a universal answer to every obligation connected with the role.
Before the arrangement starts, establish:
- which legal entity is the employer and which entities sign the service and employment agreements;
- who directs day-to-day work, approves leave or changes to the role, and handles performance decisions;
- which duties the agreement assigns to the EOR and which require an internal owner;
- what records each party keeps and who receives an escalation when the working arrangement changes; and
- which local questions need separate review for the work and location involved.
Put those decisions in the service agreement and the team’s operating records. If the role changes after launch, revisit the allocation with the current facts rather than assuming the initial arrangement still answers the same questions.
What an independent contractor arrangement does
An independent contractor arrangement engages a person or business for services rather than placing the role in an employment relationship. The agreement matters, but the way the work is actually performed and the rules that apply to the engagement remain central to the assessment.
Where independence has to show up in practice
Independence needs to be visible in the working relationship, not just in the agreement’s title. Great Britain’s guidance describes self-employed people as generally having the most flexibility and control over how, if and when they work, often as people in business for themselves. It does not make any single trait conclusive.
Review the practical evidence:
- Control over the work. Does the contractor decide how to deliver the agreed result, or does the company direct the method and day-to-day performance?
- Commercial independence. Does the contractor invest in their own tools, offer services to the relevant market, and carry a prospect of profit or loss?
- Place in the business. Is the work integrated into the company’s ordinary operations, or is it delivered as a separate service?
- Personal performance and continuity. Must the individual perform the work personally, and does the engagement take on an ongoing character?
For US federal employment tax, the IRS groups relevant evidence into behavioural control, financial control and the relationship of the parties. That framework is not a global classification test, but it is a useful reminder that control, commercial reality and the relationship all matter. Review the facts against the local question identified for the engagement.
What the client needs to document
The contractor agreement should describe the commercial arrangement clearly, while the team’s records show how that arrangement operates in practice. A title or standard clause cannot replace a record of the actual work relationship.
Document the points that make the engagement reviewable:
- the contracting parties, services, deliverables and payment terms;
- the agreed scope and the contractor’s responsibility for delivering it;
- the working arrangements that show how direction, tools and commercial decisions are handled;
- changes to the role, expected continuity or the way the company supervises the work; and
- the rights terms that apply to the deliverables, including any assignment or licence the parties intend.
Keep the agreement and the operational record aligned. When the day-to-day arrangement changes, update the facts for review instead of relying on the original contract wording. Rights to deliverables also need their own document trail: under US copyright law, receiving a copy of work does not by itself transfer copyright ownership.
Employer of Record vs. independent contractor at a glance
The summary table frames the questions. The sections below explain how to apply the work facts and local rules to the engagement. Neither arrangement removes the need to review the agreements and duties that apply in the location.
Legal relationship and classification
The central difference is the legal relationship around the role. An EOR is the legal employer in its employment arrangement. A contractor agreement describes a services relationship, but the label does not determine the worker’s status by itself.
For an employment-relationship determination, ILO Recommendation 198 says that facts about the performance of work and remuneration should guide the assessment despite a contrary contractual description. Apply those facts through the rules that govern the engagement. In Great Britain, a review for employment rights and a review for tax status concern separate systems, so one conclusion does not automatically resolve the other.
Treat classification as a question to investigate before selecting a model. Record the real relationship, specify the local question, and obtain the appropriate review. That gives the team a basis for choosing an EOR or contractor arrangement without presenting either label as a universal answer.
Direction, autonomy and continuity
The legal employer and the day-to-day decision maker may be different parties in an EOR arrangement. Identify who sets objectives, chooses the method of work, supervises performance and approves changes to the role. Those details belong in the operating record alongside the agreements.
For a contractor arrangement, independence needs to be visible in those same details. Great Britain’s guidance says that self-employed people generally have the most flexibility and control over how, if and when they work. The ILO lists control, integration, personal service and continuity among possible indicators that national rules may define, so a contractor label alone cannot settle the question.
Continuity deserves its own review. A role that is long or repeatedly renewed can be relevant evidence, but there is no universal duration cutoff that determines status. Revisit the fact record when the company begins directing the work more closely, expects continuing availability, or moves the role nearer to its core operations.
Administration, benefits and tax treatment
In the EOR model described by a UK government report, the intermediary hires and pays the employee and handles the corresponding employer obligations. The client funds the salary and service fee. The exact services, records and local obligations still need to be read in the applicable agreements rather than assumed from the EOR label.
Employment status can affect obligations around pay, leave and working conditions. Great Britain’s guidance makes that point for employment rights, while also distinguishing employment-rights status from tax status. A review that answers one question therefore may not answer the other.
For a contractor arrangement, keep the commercial records that support the services relationship: the agreement, scope, payment terms, deliverables and the facts of how work is performed. Ask the reviewer to address the specific local tax and employment questions that apply to that engagement. Neither an EOR service nor a contractor agreement creates a universal treatment for benefits or tax.
Flexibility, cost structure and long-term fit
Cost starts with the arrangement’s actual components. In the EOR model described by the UK report, the client funds salary and a service fee. Ask the provider for a quote for the relevant location and scope, then review the agreement for the services and responsibilities included. A percentage or average from another arrangement will not answer what this role costs.
The right long-term fit follows the relationship, not a calendar threshold. A continuing role can be relevant evidence when the team assesses a contractor arrangement, yet the reviewed sources provide no universal duration cutoff. Revisit the choice when the work becomes more closely directed, more integrated with the business or different in scope from the original service.
An EOR can fit a role that needs an employment relationship where the company lacks a suitable local entity. A contractor arrangement can fit genuine independent services. Both choices require a current fact record, a clear local question and an agreement that reflects the role the business is actually running.
Contracts, records and rights to deliverables
Both arrangements need documents that match the operating reality. For an EOR, review the service agreement, employment agreement and allocation of duties. For a contractor arrangement, review the services agreement, scope of work and records that show how the work was carried out. In either case, name the contracting parties, the decision maker, the record owner and the escalation route.
Rights to deliverables need a separate check. Under US copyright law, the author is generally the initial owner, subject to the rule for qualifying works made for hire. A transfer of copyright ownership outside operation of law requires a writing signed by the rights owner or an authorised agent. Other jurisdictions and the actual agreements can produce different results.
Before approving an engagement or a transition, trace:
- who created the work and which parties were involved;
- the assignment or licence that covers the deliverables;
- the signature and authority behind that document; and
- whether the terms cover work already delivered, future work, or both.
Keep those records with the relevant agreement and acceptance materials. For work governed by US copyright law, a clean rights chain requires more than possession of a deliverable. Review the applicable rights documents again when the arrangement changes.
When an independent contractor arrangement fits
A contractor arrangement can fit when the relationship is genuinely one of independent services. The points below guide a fact review; they are not a classification test or a substitute for applying the rules that govern the engagement.
Defined specialist work
A defined specialist project can suit a contractor arrangement when the business needs a distinct service and the contractor retains real control over how to deliver it. Great Britain’s guidance describes self-employed people as generally having the most flexibility and control over how, if and when they work, often as people in business for themselves.
Make the assignment specific enough to evaluate:
- describe the service, expected deliverables and acceptance point;
- record the contractor’s responsibility for the method, tools and professional judgement used to deliver the work;
- set payment terms and the rights terms that apply to the deliverables; and
- record material changes to the scope, supervision or expected availability.
Specialist skill alone does not decide the arrangement. Recheck the working relationship if the company begins directing the method of work, requires continuing availability or changes the project into an ongoing role within its operations.
A genuinely independent business relationship
An independent business relationship has to be credible beyond the signed agreement. Look for a contractor who controls the delivery of services, operates with commercial independence and is not simply carrying out the company’s work under its daily direction.
For US federal employment tax, financial-control evidence can include investment in tools, services offered to the relevant market, and the opportunity for profit or loss. The ILO also names financial risk, control and integration as possible indicators that national rules may define. These are facts to investigate, not boxes to tick or a universal test.
Ask practical questions about the relationship:
- Does the contractor set the method and manage the work needed to deliver the agreed result?
- Does the contractor hold themselves out as a provider of services beyond this engagement?
- Does the contractor make commercial decisions about tools, capacity and the work accepted?
- Does the company avoid directing the contractor’s daily work as it would an internal role?
The answers should match the agreement, work records and day-to-day practice. If they diverge, return to the fact review before treating the engagement as independent contracting.
Changing or project-based requirements
Project-based work can make the scope of a contractor engagement easier to define, but a project label does not settle the relationship. The useful question is whether the facts still show independent services as the work evolves.
Set review points when the engagement changes:
- the project is extended or repeatedly renewed;
- the contractor’s expected availability increases;
- the company takes a larger role in directing how the work is done;
- the work becomes more integrated with the company’s ordinary operations; or
- the parties change the scope, payment structure or deliverables.
Continuity is relevant evidence, yet there is no universal period after which a contractor arrangement must change. Keep the current facts with each scope change and reopen the local review when the relationship no longer resembles the one first documented.
When an Employer of Record fits
An Employer of Record can fit after the team has reviewed the actual relationship and identified a need for an employment arrangement. It is a way to establish that relationship where the company does not have a suitable employing entity in the location.
A role that needs an employment relationship
Consider an EOR when the applicable review points toward an employment relationship for the role and the business needs a legal employer in the relevant location. A UK government report describes an EOR as a commercial intermediary that serves as the legal employer of a workforce when the business lacks a suitable entity there.
The decision should rest on the relationship the company plans to operate, including the level of direction, the role’s integration with the business and the local questions that need an answer. It should not rest on a contract label, a single indicator or the length of the engagement alone.
Before selecting an EOR, confirm:
- the entity that will be the legal employer;
- the work facts and local question that led to the employment decision;
- the services the provider will perform under the agreement; and
- the internal responsibilities, records and escalation routes the client will retain.
This gives the business a practical basis for an employment arrangement while keeping the review tied to the facts of the role.
A continuing role with benefits and local employment obligations
A continuing role may need an employment arrangement when the current facts and applicable review point in that direction. Continuity is relevant evidence, but it is not a universal status rule. Assess it alongside direction, integration, the terms of engagement and the other facts of the working relationship.
In Great Britain, employment status can affect rights connected with pay, leave and working conditions. The applicable benefits and obligations need to be identified for the local status and role; they should not be assumed from an EOR or contractor label.
For a role that requires employment, use the EOR review to establish:
- the local employment obligations relevant to the engagement;
- the employment terms and benefits that the agreements cover;
- the provider’s administrative responsibilities; and
- the client’s continuing operating, record-keeping and escalation responsibilities.
This keeps a long-running engagement under review as the role develops, instead of treating its duration as the deciding fact.
Entering a new market without a local entity
An EOR can be relevant when a company needs to employ a worker in a location where it lacks a suitable employing entity. The UK government report identifies that situation as a reason businesses may use an EOR, which acts as the legal employer and commercial intermediary for the workforce.
The absence of a local entity does not remove the need to review the engagement. Before proceeding, establish the entity that will employ the team member, the work the client will direct, the local obligations that apply and the responsibilities allocated by the service agreement.
The UK report also cautions that risks can remain with the ultimate engager, including possible taxable presence from work carried out on its behalf. Treat the provider agreement as a document to review for the actual location and role, with clear internal owners for the duties and escalations that remain.
Review the responsibility and documents matrix
An EOR arrangement needs a working map of the client, provider and team member. Build that map from the actual agreements and operating facts, then use it to identify the duties, records and escalation routes that need an owner. It is a review tool, not a fixed allocation of liability.
The process below puts the review in order: identify the parties, record day-to-day direction, allocate applicable duties, name record and escalation owners, then check rights for earlier and future deliverables.

Confirm the parties and the day-to-day decision maker
Start by naming the parties in each document and the role each one performs in practice. In the EOR model described by a UK government report, the EOR is the legal employer and commercial intermediary; it hires and pays the employee, while the client funds salary and a service fee. The agreements should show how that structure applies to the engagement at hand.
| Review item | Record to confirm |
|---|---|
| Legal employer | The entity named in the employment arrangement. |
| Client entity | The business entity that engages the provider and receives the work. |
| Team member | The person hired through the EOR arrangement. |
| Daily decision maker | Who sets priorities, directs the work and approves operational changes. |
| Document owners | Who keeps the service agreement, employment terms and operational records. |
| Escalation owner | Who acts when the working arrangement or an applicable duty changes. |
Before signing an Employer of Record service agreement, write down who is the legal employer, who directs the work each day, which records each party keeps, and who owns an escalation. That review gives the team a way to identify duties that still need an internal owner instead of relying on a broad promise that the provider handles compliance.
— Mike Smirnov
Allocate obligations in the service agreement
The service agreement should assign the duties that apply to this engagement rather than relying on a general promise that the provider handles compliance. Record the owner for each duty, the supporting document or record, and the route for raising a change or problem.
The US Occupational Safety and Health Administration’s temporary-worker guidance illustrates why a blanket assumption is unsafe: it treats the staffing agency and host as jointly responsible for a safe workplace and recommends that their contract set out their respective safety responsibilities. That guidance concerns US temporary staffing and workplace safety. It does not establish a universal allocation for EOR arrangements.
Use the service agreement to clarify, for the actual location and role:
- the employment-administration duties assigned to the provider;
- the client’s responsibilities for daily work decisions and workplace conditions;
- which party keeps the relevant employment, service and operational records;
- who is notified when the role, working arrangements or applicable requirements change; and
- which matters need a separate local review instead of a contractual assumption.
The agreement should match the way the parties operate. Revisit the allocation when either the working relationship or the applicable obligations change.
Check the rights chain before and after a transition
A move from contractor to EOR changes the documents around the engagement; it does not answer the ownership of work already created. Review earlier deliverables and future work as separate document questions, with the applicable law and agreements in view.
For work governed by US copyright law, the author is generally the initial copyright owner, subject to the rule for qualifying works made for hire. A transfer outside operation of law requires a writing signed by the rights owner or an authorised agent. Other jurisdictions and the actual agreements may produce different results.
Trace the rights chain before the transition takes effect:
- identify the author and every contracting party for earlier work;
- locate the assignment or licence, its signatory and the deliverables it covers;
- check whether the agreement covers rights already created, future work, or both; and
- record the terms that will govern work created after the employment arrangement begins.
Keep the relevant agreements, task records and acceptance materials together. That gives the team a basis for reviewing the change without assuming that the new employment relationship alters earlier rights automatically.
Moving from contractor to an Employer of Record
Moving to an EOR is a change in the arrangement around a role. Begin with the current working relationship, then plan the documentation and communication needed for the transition.
Reassess the working relationship
Before a transition, update the fact record rather than relying on the contractor agreement or the facts that existed when it was signed. The role may have changed through closer direction, ongoing availability, deeper integration with the business or a different scope of work.
Review the current engagement:
- who directs the work and how that direction operates day to day;
- whether the contractor still controls the method, tools and commercial delivery of services;
- the role’s continuity, expected availability and place in the company’s operations;
- the parties, remuneration and documents that govern the work; and
- the local employment, tax or other question the team needs answered.
Continuity can be relevant evidence, but it has no universal duration cutoff. Use the updated facts to obtain the appropriate local review before deciding whether an EOR employment arrangement fits the role.
Plan the change with the team member
Once the team has decided to move to an EOR arrangement, make the new relationship clear to the team member before it begins. The plan should distinguish the existing contractor arrangement from the employment arrangement and identify the parties and documents that will govern the work going forward.
Agree and record:
- whether and how the contractor agreement changes or ends;
- the entity that will employ the team member and the start point for the employment arrangement;
- the work, reporting relationship and day-to-day decision maker after the transition;
- the records, contacts and escalation route the team member will use; and
- the documents that address rights to earlier and future deliverables.
The required notice, consent, timing and employment terms depend on the applicable law and agreements. Bring the current facts and proposed documents into the local review, then give the team member a single, consistent explanation of the change.
Reconcile agreements, records and deliverables
Before the employment arrangement begins, compare the earlier contractor documents with the documents that will govern the new relationship. The goal is to leave a clear record of the transition, including the scope of work and rights position on both sides of the change.
Reconcile the following items:
- the contractor agreement and any amendment, close-out or continuing terms;
- the EOR service agreement and employment arrangement, including the parties and start point;
- work records, accepted deliverables and payments connected with the contractor period;
- the author, assignment or licence, signing authority and covered scope for earlier deliverables; and
- the rights and record-keeping terms that will apply to future work.
Under US copyright law, an ownership transfer outside operation of law requires a signed writing from the rights owner or an authorised agent. That rule does not determine outcomes elsewhere, so check the applicable law and agreements for the engagement. Keep the before-and-after documents together so the business can trace both the work and the rights attached to it.
Managing an established contractor relationship with 4dev.com
Once your review supports a genuine contractor relationship, 4dev.com’s Contractor Platform gives the business one place to manage the work after selection. It supports task, agreement, document and status operations, rights choices, and engagement history for contractor relationships. It does not provide the employment arrangement described in the EOR sections.
4dev.com keeps a central register of tasks, statuses, contracts, closing documents and full history. The client signs one agreement with 4dev.com that covers its contractor relationships, rather than a separate direct agreement for each contractor. That structure supports the operational record; it does not settle classification or liability for the engagement.
Use the platform to keep the facts and documents connected:
- record the task and its current status;
- retain the agreement and closing documents with the engagement history;
- document the rights arrangement for the particular deliverable; and
- preserve the record when a scope, status or relationship changes.
Rights on 4dev.com are task-specific. Unless a task says otherwise, the service agreement assigns deliverable IP to the client; a task can instead state that the contractor retains the IP. Where applicable, the invoice and acceptance certificate can confirm the assignment. Review the terms for each task rather than assuming the same rights result for every deliverable.
Frequently asked questions
These answers keep the decision tied to the actual working relationship, the documents and the local question that needs review.
Is an Employer of Record the same as hiring an independent contractor?
No. An Employer of Record is the legal employer in an employment arrangement. An independent contractor arrangement engages services and needs to reflect a genuinely independent working relationship.
The distinction is not resolved by the title used in an agreement. Facts about control, integration, personal service, continuity, commercial independence and remuneration can be relevant to the applicable assessment. Identify the local question first, then review the relationship and documents before choosing either arrangement.
Can an Employer of Record solve a contractor classification issue?
An EOR can provide an employment arrangement after the business has reviewed the relationship and identified that route as appropriate. It does not replace the assessment of the facts, the applicable local question or the obligations connected with the work.
Start with how the role is actually performed, then obtain the review required for the relevant location. If the decision is to move to an EOR, document the new employment relationship, allocate the duties in the service agreement and preserve the records and rights chain from the earlier contractor engagement. Continue to revisit the facts if the role changes.
Does a longer engagement change the appropriate arrangement?
Not automatically. A long or repeatedly renewed engagement can be relevant evidence, but there is no universal duration cutoff that determines a worker’s status or requires a change from contractor to EOR.
Use a renewal or extension as a prompt to update the fact record. Review whether the company now directs the work more closely, expects ongoing availability, has integrated the role more deeply into its operations, or changed the scope of services. Then apply the local question and current facts to decide whether the arrangement still fits.
What should a company check before changing a contractor to an Employer of Record?
Start with the current working relationship and the local question that needs an answer. Then reconcile the documents and responsibilities that change with the move to an employment arrangement.
Check:
- the actual direction, autonomy, continuity and integration of the role;
- the entity that will be the legal employer and the parties to the new agreements;
- how the contractor agreement changes or ends and when the new arrangement begins;
- the provider’s duties, the client’s retained duties, record owners and escalation route; and
- the author, assignment or licence, signatures and deliverables covered before and after the transition.
The details depend on the applicable law and agreements. Keep the fact record, service agreement, employment terms and rights documents together for the local review.
Does an Employer of Record take every responsibility away from the client?
No. The client still needs to understand the duties that apply to its work and the responsibilities allocated in the service agreement. A UK government report cautions that risk can remain with the ultimate engager, including possible taxable presence from work carried out on its behalf.
The allocation depends on the agreement, role and location. In the narrower context of US temporary staffing safety, OSHA treats the agency and host as jointly responsible for a safe workplace. That example does not establish universal EOR liability, but it shows why the client should not rely on a blanket assumption that every duty has moved to the provider.
Identify the legal employer, daily decision maker, record owners, applicable duties and escalation route before the arrangement starts. Revisit that map when the work or local requirements change.
How can a company protect rights to work created before a transition?
Trace the rights chain for earlier work before the new employment arrangement begins. Identify the author, contracting parties, assignment or licence, signatory and the deliverables each document covers. Keep that record separate from the documents that will govern future work.
Under US copyright law, receiving a copy of a deliverable does not by itself transfer copyright ownership. A transfer outside operation of law requires a writing signed by the rights owner or an authorised agent. The applicable jurisdiction and the actual agreements determine the result for a particular engagement.
Keep the earlier agreements, task records, assignment or licence and acceptance materials together. Review whether they cover completed work, future work, or both, then record the rights terms that will apply after the transition.