Waiver of Subrogation for Contractors: What It Means and When You Need It

A waiver of subrogation is a policy endorsement that gives up your insurer's right to chase reimbursement from the client or general contractor you agreed in a contract to protect. It only counts if you add it before a loss happens. It attaches through a separate endorsement on workers' comp, general liability, and commercial auto.

Construction contracts demand it constantly. The waiver of subrogation ends up on nearly every subcontractor's certificate, a standard piece of their contractor insurance that owners and GCs write into their subcontracts. Here's which policy it attaches to, what the endorsement costs, and when a workers' comp waiver is unenforceable in the state where you work.

What is a waiver of subrogation?

A waiver of subrogation is an insurer's agreement not to pursue a third party to recover a loss it paid on your behalf. Subrogation is your insurer stepping into your shoes to sue whoever caused the damage. The waiver switches that right off for the party named in your contract, but only if it's agreed before the loss happens.

That's the whole answer to what is a waiver of subrogation, and it's narrower than most contractors expect. Think of it as one narrow promise. Once your carrier settles your claim, it gives up the right to chase the client or general contractor you agreed to hold harmless. The clause governs recovery alone, and it leaves your own protection and anyone's payout untouched.

Timing is strict. The waiver has to be in place before a loss, because giving up recovery after the damage is done breaks the principle of indemnity, and carriers won't honor it. One built-in guardrail helps here. The anti-subrogation rule bars an insurer from subrogating against its own insured, so parties sharing a carrier have no one to chase.

Why does my contract require me to waive subrogation?

Your contract requires a waiver of subrogation so your insurer can't recover from the owner or general contractor after a covered loss. If a claim gets paid, your carrier absorbs it rather than suing to claw the money back. The goal is simple. Owners and GCs use the waiver to keep everyone's insurers from suing each other after a fire, which keeps the project moving and the parties out of court.

A California hardscape and paver contractor we work with had just cleared their CSLB license and bond when a general contractor's subcontract insurance exhibit landed. It demanded a waiver of subrogation on both their workers' comp and general liability. (Nobody walks you through that part when you pull the license.) The requirement is risk transfer at work. Each side agrees its own insurer absorbs the loss and nobody sues across the table.

Most of these contracts follow the AIA A201-2017 General Conditions, whose Section 11.3.1 sets a mutual waiver among the owner, contractor, subcontractors, and architect. It holds even where a party would otherwise owe a duty to indemnify. As construction attorney Kenneth Slavens writes for IRMI, these clauses are "intended to minimize the potential for lawsuits, cross-suits, and counter-suits."

Is a waiver of subrogation the same as additional insured?

No. Additional insured status extends your policy to protect another party against third-party claims. A waiver of subrogation does the reverse and stops your insurer from recovering from that same party after it pays your claim. They travel together but solve opposite problems. That's why a GC usually demands both on your certificate.

Read side by side, the additional insured vs waiver of subrogation distinction comes down to which direction the coverage points.

Both land as separate line items on the ACORD 25 certificate of insurance the GC collects. The certificate documents them. Their legal force comes from the policy forms underneath. A GC asks for both because together they push more of the project's risk onto your policy, which IRMI describes as a deliberate stacking of the risk transfer.

How does the waiver work on workers' comp, general liability, and auto?

A waiver of subrogation attaches to each policy through its own endorsement, and the exact form depends on the line. Workers' comp uses WC 00 03 13, general liability CG 24 04, and auto CA 04 44 or CA 04 43. None of it is automatic. Your agent has to add each endorsement to the specific policy the contract names.

On the workers' compensation side, WC 00 03 13 is the NCCI endorsement titled "Waiver of Our Right to Recover From Others," published as a standard form. A workers comp waiver of subrogation runs through this single form in NCCI states. The carrier has to file it before it applies.

For general liability, CG 24 04 from ISO does the parallel job on your general liability coverage, as IRMI lays out. It's the scheduled ISO form that waives your GL carrier's recovery against one named party. Sign enough jobs and insurers usually fold in a separate blanket waiver that reaches every party you're contractually required to protect. Commercial auto splits into two forms, per InsuranceXDate: CA 04 44 for a scheduled waiver and CA 04 43 for a blanket one.

None of it is automatic. Each waiver of subrogation endorsement is added by request, so a policy that looks complete can still be missing the exact form a contract demands.

Do I need a blanket or a scheduled waiver?

You need a blanket waiver if you sign many contracts and want every one covered automatically; you need a scheduled waiver if only one named party or project requires it. A scheduled waiver lists the specific entity and must be re-issued for each new contract, while a blanket waiver applies to any party you're contractually required to protect.

Take an underground-utility contractor doing around $6.5 million a year and signing dozens of prime contracts. For a while they chased a fresh scheduled endorsement every time a new general contractor came aboard, holding up the start of each job. Switching to a blanket waiver of subrogation ended the per-contract scramble. One endorsement now covers any owner or GC their contract names, per TotalCSR's read of the CG 24 04 form.

Workers' comp is the exception. Blanket waivers are often unavailable in state assigned-risk plans, the coverage of last resort for hard-to-place employers, so a contractor there may still need a scheduled waiver naming each party.

How much does a waiver of subrogation cost?

A waiver of subrogation usually costs little relative to the contracts it protects. Workers' comp waivers typically run 2% to 5% of premium, while general liability blanket waivers are frequently free and scheduled endorsements carry only a small flat fee.

Some states set the workers' comp charge by rule, so the exact number depends on your state and carrier.

Some state rating bureaus publish the exact charge. The California State Fund charges 3% of payroll for a specific waiver and 2% of premium for a blanket one. Indiana's rating bureau sets the workers' comp charge at 5% of manual premium or a $250 minimum. On general liability, many contractors get a blanket waiver folded in for free, while a scheduled endorsement usually runs a small flat charge.

Many contractor GL policies already carry a blanket waiver. Before a contractor pays for a separate endorsement, a Coverwatch broker checks what's already on the policy and confirms it matches what the contract requires.

Can a workers' comp waiver of subrogation be void in my state?

Yes. Some states void or restrict workers' compensation waivers of subrogation as a matter of public policy, so a waiver your contract demands may not actually be enforceable where you work. Missouri voids them for construction-group employers by statute, and a handful of other states limit or prohibit them. There, a printed endorsement can sit on the policy with no legal effect after a loss.

Missouri is the clearest, statute-level case. RSMo 287.150 voids a workers' comp waiver against a construction-group employer there, so no subcontract can force one no matter how the exhibit reads.

A few other states restrict or void these waivers by statute. Kentucky, New Jersey, and New Hampshire are examples, though the specifics vary and each needs checking for the state where you work. Four monopolistic state-fund states run their own workers' comp funds and handle waivers on their own terms: Ohio, Washington, North Dakota, and Wyoming.

Enforceability shifts from state to state. Before the certificate goes out, have your broker confirm the waiver is both allowed in the state where the crew works and endorsed onto the policy the contract names.