Construction retainage laws by state: the rules every contractor needs to know

Retainage — the percentage of each payment that a project owner holds back until substantial completion — is standard in construction contracts, but the rules governing it are far from uniform. Most states have passed retainage statutes that cap how much can be withheld, define the conditions and timing for release, and specify penalties when retainage is held past the legal deadline. Understanding the rules in your state is the difference between knowing when you have a legal claim and waiting months longer than you are legally required to.

Retainage caps: most state statutes set a maximum retainage percentage, commonly 5 or 10 percent of each progress payment. Some states allow higher retainage early in a project and require reduction once a milestone is reached — for example, allowing 10 percent until 50 percent completion and then requiring reduction to 5 percent. California caps retainage at 5 percent on most public works contracts. Texas caps it at 10 percent on public projects. Florida allows 10 percent initially, with reduction to 5 percent once the project is 50 percent complete. These caps apply to prime contracts; subcontractor retainage terms may differ within the same project.

Release timing rules: the question of when retainage must be released — not when it typically is, but when it legally must be — is governed by a combination of the contract, the applicable statute, and the definition of substantial completion. Many states require release within 30 to 45 days of substantial completion on public projects. Private project rules are often less rigid but are still governed by the contract terms and any applicable state statute. A contractor who has completed the punch list and received the certificate of substantial completion has a clear basis to request retainage release in writing and to follow up on a firm timeline.

State-specific highlights: Texas requires retainage release within 30 days of completion on public contracts and imposes interest on late releases. California requires prompt payment of retainage once all conditions are met, and interest accrues on late payments. New York requires release within 30 days of project acceptance. Washington allows substitution of securities in place of withheld cash. Florida ties retainage release to the subcontractor's completion of their scope, not the overall project. These are general summaries — the actual statute language and court interpretations matter and change, so confirm current rules with a construction attorney before relying on them.

When retainage is withheld past the legal deadline: if retainage is not released when legally required, options include sending a formal demand letter citing the applicable statute, pursuing a mechanic's lien if lien deadlines have not passed, and initiating litigation. Many states impose interest penalties on retainage held past the release deadline — 1 to 2 percent per month in some jurisdictions — which gives owners a strong financial incentive to release on time if you enforce the deadline. The challenge is that most contractors do not know the applicable statute exists, let alone how to invoke it.

Practical tracking: the most effective approach is to treat each project's retainage balance and expected release date as a line item in your AR aging report alongside regular progress invoices. Build the expected release date into your accounting system when the contract is signed, set a follow-up reminder for 5 business days before that date, and send a written request for release on the release date itself. Syntharra's AI collection agent handles automated follow-up on your standard progress invoices — retainage release tracking sits on top of that as a scheduled event rather than an active invoice. See retainage release and draw schedule in the glossary for related concepts.