The Alternate Employer Endorsement. A Complete Guide

ByGordon Coyle Reading Time: 9 minutes

If you use temp workers, leased employees, or contract labor, there is a dangerous coverage gap hiding in your workers’ compensation policy. The alternate employer endorsement is the fix. Without it, a single workplace injury could land you in court with no insurance backing you up.

At The Coyle Group, we help staffing agencies and host employers close this gap before it becomes a six-figure problem.

The Bottom Line (TLDR)

  • The alternate employer endorsement extends workers comp coverage to the company where temp workers actually perform their jobs
  • Without it, host employers face direct lawsuits from injured temp workers outside the workers comp system
  • OSHA considers staffing agencies and host employers “joint employers” with shared safety responsibilities
  • This is not the same as being named as an additional insured on a general liability policy
  • Cost is minimal compared to the exposure it eliminates
  • The endorsement attaches to the staffing agency’s workers comp policy, not the host employer’s
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What Does the Alternate Employer Endorsement Actually Do?

The alternate employer endorsement (NCCI form WC 00 03 01 A) is an add-on to a workers compensation policy. It extends both workers compensation and employers liability coverage to a company listed as the “alternate employer” on the staffing agency’s policy.

In plain language

It makes the host employer an insured on the staffing agency’s policy, but only for injuries to the temp workers assigned to that host.

What it covers:

  • Part One (Workers Compensation Insurance) applies as though the alternate employer is insured
  • Part Two (Employers Liability Insurance) protects the alternate employer from negligence lawsuits by temp workers
  • The staffing agency’s insurer will not ask the host employer’s insurer to share in the loss

What it does not cover:

  • The host employer’s own permanent employees
  • Workers leased from Professional Employer Organizations (PEOs), which require different endorsements
  • The alternate employer’s statutory obligation to carry its own workers comp for its direct employees

What 40+ Years Taught Me About This Risk

Most business owners assume the staffing agency’s workers comp policy automatically covers them if a temp worker gets hurt on their premises. It does not. The temp worker can file a comp claim through the staffing agency and simultaneously file a negligence lawsuit against your company. The alternate employer endorsement closes that door.

How Does Coverage Flow Between the Staffing Agency and the Host Employer?

Understanding the three-party relationship is critical. Here is how coverage works with and without the endorsement:

Party

Role

Without Endorsement

With Endorsement

Staffing Agency

Primary employer, carries workers comp

Pays comp benefits to injured worker

Same, plus policy extends to host employer

Host Employer

Directs daily work, controls job site

Exposed to negligence lawsuits with no comp protection

Treated as insured under staffing agency’s policy

Temp Worker

Performs work at host employer’s location

Can file comp claim AND sue host employer separately

Workers comp is the sole remedy against both employers

The key takeaway

The endorsement makes workers compensation the exclusive remedy for the injured temp worker against both the staffing agency and the host employer. This prevents the “double exposure” scenario where the worker collects comp benefits from the agency and also sues the host employer in court.

When Is an Alternate Employer Endorsement Required?

You need this endorsement whenever workers are performing jobs at a location controlled by someone other than their direct employer. Common triggers include:

  • Client contract requirements where the host employer demands the staffing firm add them to the policy before work begins
  • Certificate of insurance requests that specifically name the host employer as an alternate employer
  • Audit findings that identify uninsured temp worker exposure
  • New staffing relationships where workers will operate at client sites

Industries Where This Comes Up Most

Construction, manufacturing, warehousing, oil and gas, healthcare staffing, and IT consulting are the most common. Any industry that places workers at a client-controlled job site creates this exposure.

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To verify your staffing contracts have proper coverage

What Happens If You Don’t Have the Alternate Employer Endorsement?

This is where the real pain lives. Without the endorsement, a temp worker injury on your premises creates exposure from multiple directions.

The Coverage Gap Problem

Scenario

What Happens

Your Financial Exposure

Temp worker gets hurt on your job site

Worker files comp claim with staffing agency

No issue here, covered by agency

Worker also sues your company for negligence

Your workers comp policy does not cover them (they are not your employee)

$50,000-$500,000+ in legal defense and settlements

Worker’s family files suit

Wrongful death or serious injury lawsuit

$500,000-$2M+ potential exposure

Your general liability policy

May exclude employment-related injury claims

Coverage denial at the worst time

Real-World Scenario: The Warehouse Injury

A distribution company hires 15 temp workers for holiday season. One falls from a loading dock and suffers a back injury.

Without the endorsement

The worker collects comp from the staffing agency and files a separate negligence lawsuit against the distribution company. The company’s own workers comp policy does not cover this worker. Their general liability likely excludes employment-related bodily injury. Result: defending a lawsuit with no insurance.

With the endorsement

Workers comp is the exclusive remedy against both employers. The negligence lawsuit is barred. The company is protected.

How Is the Alternate Employer Endorsement Different from Other Coverages?

This is one of the most misunderstood areas in workers’ compensation.

Coverage Type

What It Does

Key Difference

Alternate Employer Endorsement

Extends workers comp and employers liability to host employer

Applies to the staffing agency’s policy, protects the host

Additional Insured (GL)

Extends general liability coverage to another party

Does not apply to workers comp in most states

Waiver of Subrogation

Prevents the insurer from recovering losses from a third party

Does not provide direct coverage to the host employer

Employers Liability

Part Two of the workers comp policy, covers negligence suits by employees

Only applies to the named insured’s own employees without the endorsement

Critical point

You cannot be named as an additional insured on a workers comp policy in most states. The alternate employer endorsement is the correct mechanism for extending workers comp coverage.

Who Is Responsible: The Staffing Agency or the Host Employer?

Under OSHA’s Temporary Worker Initiative, both parties share responsibility. Here is how it breaks down:

Staffing Agency Responsibilities

  • Carry workers compensation insurance for all placed employees
  • Add the alternate employer endorsement listing client companies
  • Provide general safety training before placement
  • Verify the host employer provides a safe workplace
  • Report injuries and cooperate on claims

Host Employer Responsibilities

  • Provide site-specific safety training to temp workers
  • Maintain a safe workplace (same standard as for your own employees)
  • Report injuries to the staffing agency immediately
  • Comply with all OSHA requirements for the worksite

→ Not sure if your staffing contracts address all of these?

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For a contract review

What Are the Most Common Mistakes with This Endorsement?

After four decades working with employers who use temporary labor, these mistakes come up repeatedly:

  • Assuming the staffing agency’s policy automatically covers you. It does not. You must be specifically listed as an alternate employer on the endorsement schedule.
  • Failing to list all work locations. If you have temp workers at multiple sites, every location must be identified on the endorsement, or you need a blanket “all locations” designation.
  • Not updating the endorsement when contracts change. New projects, new locations, or changed scopes of work may require an updated endorsement.
  • Confusing this with additional insured status. These are completely different mechanisms that protect against different exposures.
  • Relying on certificates of insurance alone. A certificate says coverage exists. It does not confirm the endorsement language actually matches your contract requirements. Request a copy of the actual endorsement.
  • Ignoring the injury reporting requirement. The endorsement requires both the staffing agency and the host employer to report injuries. Failure to report promptly can jeopardize coverage.
  • Not verifying the endorsement includes employers liability (Part Two). Some endorsements only address Part One (workers comp). You need both parts for complete protection.

How Much Does an Alternate Employer Endorsement Cost?

The alternate employer endorsement itself typically adds little to no direct cost to the staffing agency’s workers comp premium. The premium the staffing agency pays is based on the payroll of the workers assigned to each client and the applicable workers compensation class codes for the work being performed.

Cost Factors

Factor

Impact

Payroll for assigned workers

Higher payroll = higher premium

Class code for the work performed

Higher-risk work (construction, manufacturing) costs more

State of employment

Rates vary significantly by state

Staffing agency’s experience modification rate

Claims history affects overall premium

Number of alternate employers listed

Minimal administrative impact

The real cost question is not “what does the endorsement cost?” but “what does it cost to not have it?” A single uninsured injury lawsuit can easily cost $100,000 to $500,000 or more in defense costs and settlements.

How Do You Add the Alternate Employer Endorsement to Your Policy?

The process is straightforward:

  • The host employer requests the endorsement from the staffing agency as part of the staffing contract
  • The staffing agency contacts their workers comp insurer to add the endorsement
  • The insurer issues the endorsement listing the host employer’s name, address, state, and any specific project details
  • The host employer receives a copy of the actual endorsement (not just a certificate) and verifies the details
  • Both parties confirm injury reporting procedures are documented

For staffing agencies with many clients

Most insurers allow the schedule to list “all” or “any” alternate employers rather than naming each individually. Turnaround is typically a few business days.

→ Schedule a consultation

To get your endorsement set up correctly

Real-World Scenario: What Happens When a Temp Worker Gets Injured On-Site?

The Claim Flow with the Alternate Employer Endorsement in Place

A temp worker suffers a hand injury operating a press at the host employer’s facility. The host employer provides first aid and reports the injury to the staffing agency and their workers comp insurer. The insurer opens a claim, and the worker receives medical treatment and wage replacement through the staffing agency’s policy. If a lawsuit is filed, the workers comp exclusivity doctrine bars the negligence claim because the endorsement treats the host employer as an insured.

Without the Endorsement

The comp claim proceeds normally through the staffing agency. But the host employer has no coverage and must defend any negligence lawsuit at their own expense. Defense costs alone typically run $50,000 to $200,000, with settlements potentially reaching much higher.

How The Coyle Group Helps Staffing Firms and Host Employers Get This Right

We do not just issue endorsements. We build the entire risk transfer framework around your staffing relationships:

  • Contract review to ensure staffing agreements address insurance, injury reporting, and safety
  • Endorsement verification confirming actual policy language matches your contractual needs
  • Workers compensation program design accounting for temporary, leased, and contract labor
  • Claims advocacy ensuring proper handling from day one
  • Safety program guidance aligned with OSHA’s joint employer requirements

Frequently Asked Questions

Yes. A temp worker can file a comp claim with the staffing agency and separately sue the host employer for negligence. The host’s own workers comp will not cover this worker, and general liability typically excludes employment-related injuries.

The endorsement is available nationwide through NCCI form WC 00 03 01 A, but it is not automatically required by law. It is a contractual risk management tool. Most host employers should require it regardless of state mandates.

At every policy renewal, and whenever you add new clients, change locations, or modify scope of work under existing contracts.

Yes. The schedule can use “all” or “any” to cover all alternate employers, or list each individually.

The borrowed servant doctrine is a legal theory courts use after an injury. The alternate employer endorsement is a contractual solution that removes uncertainty before an injury happens. Do not rely on a court deciding your coverage question after the fact.

No. You still need your own policy for your permanent employees. The endorsement only covers the temp workers assigned to you.

No. In most states, you cannot be named as an additional insured on a workers compensation policy. The alternate employer endorsement is the correct mechanism for extending workers comp and employers liability coverage to a host employer.

The endorsement allows cancellation without notice to the alternate employer. Build notification requirements into your staffing contract and verify coverage regularly through updated certificates of insurance.

Your Next Step

If you use temp workers, leased employees, or contract labor, verify your alternate employer endorsement is in place today. Most host employers we audit discover they either lack the endorsement entirely or have outdated schedules that do not reflect current operations.

Schedule a Call

For a complimentary review of your temp worker coverage.

This article was written by Gordon B. Coyle, CPCU, ARM, AMIM, PWCA, CEO of The Coyle Group, who has over 40 years of experience working with business owners of all sizes and industries across the US, solving their insurance challenges. Gordon specializes in helping companies that rely on temporary, leased, and contract labor build workers compensation programs that eliminate coverage gaps and protect against costly litigation.

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