What Is Retainage and How Does It Affect Lien Waivers

Retainage is the portion of your earned money that someone else is holding. On virtually every commercial construction project, the owner withholds a percentage of each progress payment — typically 5% to 10% — as a financial guarantee that the work will be completed correctly. That money accumulates throughout the project and sits in the owner's account until milestones are hit. For a GC running a $4M commercial project at 10% retainage, that's $400,000 of earned revenue that won't arrive until the project closes out.

Understanding what retainage is, when it gets released, and how it interacts with lien waivers at every draw is essential for managing cash flow and avoiding the disputes that stall final payment on nearly every project.

What Is Retainage?

Retainage — sometimes called retention — is a contractually defined holdback applied to each progress payment on a construction project. Instead of paying the full certified amount on each draw, the owner pays the certified amount minus the retainage percentage.

For example: if the architect certifies $200,000 on a monthly draw and the contract calls for 10% retainage, the GC receives $180,000. The remaining $20,000 is added to the running retainage balance held by the owner. That balance grows with every draw until it's released at the milestones defined in the contract.

The purpose of retainage is to give the owner leverage to ensure the project gets completed. If a GC has already been paid in full, the owner has limited financial leverage to push for punch list completion or warranty work. Retainage solves that by keeping real money on the table until the end.

How Much Retainage Is Typical?

Many contracts include a retainage reduction provision — once the project reaches 50% completion, the retainage rate drops from 10% to 5% on all subsequent draws. This is worth negotiating for on larger projects. On a $5M job, the difference between 10% and 5% retainage on the back half of the project is $125,000 in cash flow.

Most states have retainage statutes that cap the maximum rate or dictate release timing on public projects. Private projects are governed entirely by the contract terms. Always read the retainage provisions in your contract before signing.

How the GC Mirrors Retainage Down the Payment Chain

When an owner withholds retainage from the GC, the GC typically withholds the same percentage from every subcontractor. This mirrors the owner's risk management approach — if the owner is holding retainage to ensure the GC performs, the GC holds retainage to ensure each sub performs their scope.

This creates a compounding effect down the payment chain. A plumbing subcontractor on a $4M project with a $400,000 scope at 10% retainage doesn't see $40,000 of their earned money until closeout. That sub, in turn, may be withholding retainage from any sub-subcontractors or suppliers they've hired.

The further down the chain you are, the more cash flow pressure retainage creates — and the more important it is to understand exactly when and how retainage gets released.

When Is Retainage Released?

Retainage release is triggered by milestones defined in the contract. The most common triggers are:

Substantial Completion

The project is complete enough to be used for its intended purpose — even if a punch list remains. This is the most common trigger for the bulk of retainage release. In most contracts, the owner releases retainage (minus a punch list holdback) when a certificate of substantial completion is issued.

Final Completion

All punch list items are resolved, all closeout documents are submitted, and the owner formally accepts the project. This triggers the final retainage release.

Reduced Retainage at 50% Completion

Some contracts reduce the retainage percentage once the project hits 50% complete. New draws after that milestone are billed at the reduced rate, but the retainage already withheld stays held until completion.

Stored Materials

Some contracts allow stored materials (delivered to the site or off-site storage) to be billed without retainage, since there's no performance risk on material that's already been purchased and delivered.

How Retainage Affects Lien Waivers at Every Draw

This is where GCs most commonly make mistakes — and where the financial exposure is real.

When a GC signs a lien waiver in exchange for a progress payment, the waiver must accurately reflect what's actually being paid — not the full certified amount. Since retainage is being withheld, the payment received is less than the amount certified.

Here's why this matters: if a GC signs a lien waiver that releases rights for the full certified amount but only received the net amount (certified minus retainage), they've waived lien rights for money they haven't been paid yet. That's a serious mistake.

A properly structured lien waiver on a progress draw should:

• Release lien rights only for the amount actually received (certified amount minus retainage)
• Explicitly carve out or preserve lien rights for the retainage being withheld
• Use a conditional progress lien waiver format so the waiver only takes effect when payment actually clears

The same logic applies to waivers the GC collects from subcontractors. When you pay a sub their draw amount minus retainage, the waiver they sign should only release rights for the amount paid — not their full contract balance.

For a full breakdown of when to use each waiver type and the language differences between them, see our guide on Conditional vs. Unconditional Lien Waivers.

Retainage and Final Payment: The Most Documentation-Intensive Moment

Final payment — specifically the release of all remaining retainage — is the most documentation-intensive payment on any construction project. Before an owner releases the final retainage check, they will typically require:

• An unconditional final lien waiver from the GC covering all remaining contract amounts including retainage
• Conditional or unconditional final lien waivers from every subcontractor and supplier with lien rights
• Certificate of substantial or final completion
• Punch list sign-off
• Closeout documents (as-builts, warranties, O&M manuals, certificates of occupancy)

The lien waivers are almost always the bottleneck. Subs who finished their scope months ago have moved on to other projects and aren't responsive about signing final waivers. The GC is caught between an owner who won't release retainage without waivers and subs who won't return calls.

This is why the lien waiver checklist for project closeout exists — and why the process of collecting final waivers needs to start before the project is actually done, not after.

The conditional final lien waiver is the right tool for the GC to provide with the final payment application — it releases all remaining lien rights, but only once the final payment actually clears. Once final payment is confirmed, the owner will often require an unconditional final lien waiver as the last document before releasing the check.

Common Retainage Disputes and How They Play Out

Punch List Inflation

The owner or architect adds items to the punch list — some legitimate, some not — and uses the list as justification to delay retainage release beyond what the contract allows. The GC's defense is a well-documented substantial completion certificate and a clear contractual definition of what triggers retainage release.

Disputed Completion Percentages

The owner claims the project isn't substantially complete; the GC disagrees. This usually comes down to contract language — specifically the definition of substantial completion — and documentation.

Owner Financial Distress

The owner doesn't have the money to release retainage. The project is done, the waivers are signed, but the check doesn't come. This is where mechanics lien rights matter — the GC and subs still have lien rights for unpaid retainage until unconditional waivers are signed. Don't sign unconditional final waivers until the check clears.

Sub Retainage When the Owner Has Released to the GC

A GC who receives retainage from the owner but fails to pass it through to subs immediately creates lien exposure. Most state prompt payment laws require the GC to pay subs within a specific window after receiving payment from the owner. Holding sub retainage after the owner has released it to the GC is both a legal risk and a relationship-ending move.

This article is for informational purposes only and does not constitute legal advice. Retainage laws and lien waiver requirements vary by state and change regularly. Always verify current requirements with official sources or consult a licensed construction attorney in your state.

Frequently Asked Questions

What is a typical retainage percentage on a commercial construction project?

The most common rate is 10% for the first half of the project, often reducing to 5% after 50% completion on contracts that include a retainage reduction clause. Some heavily negotiated contracts start at 5%. Public projects in many states have statutory caps on retainage — often 5% or 10% depending on the state and project type. Private project rates are set entirely by contract.

Can a subcontractor file a mechanics lien for unpaid retainage?

Yes. Retainage is earned compensation that hasn't been paid yet. A subcontractor who completed their scope and hasn't received their retainage has the same lien rights for that unpaid retainage as they would for any other unpaid invoice — subject to the filing deadlines and notice requirements in their state. This is why it's critical that lien waivers at each draw only release rights for amounts actually received, not for retainage being held.

What happens if an owner refuses to release retainage?

The GC's options depend on the contract and state law. First, review the contract for the retainage release trigger — if the trigger has been met and the owner is still holding, that may be a breach of contract. Many states have prompt payment laws with specific retainage release deadlines and interest penalties for late release. If the owner still won't pay, a mechanics lien for the unpaid retainage — before any unconditional final waivers are signed — is the primary enforcement tool.

Should a lien waiver on a progress draw cover the retainage being withheld?

No. A lien waiver should only release rights for amounts actually paid. The waiver on a progress draw should cover the net payment received (certified amount minus retainage) and explicitly preserve the right to lien for the withheld retainage. Using a conditional progress lien waiver format protects against signing away rights for money you haven't received. When retainage is finally paid, that's when the final lien waiver covering the retainage amount is exchanged.