What Is Retainage in Construction?

The short answer: Retainage, also called retention, is a percentage of each progress payment the owner or general contractor holds back until the job is done. It is security that the work gets finished, and finished right. You earn the money as you go, but you do not collect it until the project closes out.

What retainage is and why it exists

Retainage is money you have earned that the party above you keeps, on purpose, until the end of the job. On most jobs it runs as a set percentage skimmed off every draw. You bill the work, they pay most of it, and they park the rest.

Here is why it exists. The owner or GC wants leverage to make sure you come back, finish the punch list, and fix anything wrong. Holding a slice of your money is that leverage. It is the same reason you might hold retainage on your own subs.

So retainage is not a penalty and it is not lost money. It is your money, held in escrow against a finished job. The catch is when you see it again.

How retainage works: the percentage and the release

Retainage is set as a percentage of each payment. Commonly it runs 5 to 10 percent, but the exact number is written in your contract, and on some jobs it is capped or stepped down by state law. Read your contract before you bill the first draw, so the holdback is no surprise.

Here is the usual flow. You complete a phase, you bill it, and the payer keeps the retainage percentage off that payment. They do this on every draw. The held amount grows as the job grows.

You get it released when the work is accepted. On many jobs that is substantial completion, often after you clear the punch list. Some contracts release part of the retainage at a milestone and the rest at the very end. The trigger and the timing are set by your contract and, on a lot of work, by state law.

How to show retainage on an invoice

Show retainage right on the face of the invoice, so the math is clear and nobody disputes it later. Bill the full value of the work, list the retained amount as a line that reduces the total, and let the balance due reflect the holdback.

Say you complete $20,000 of work this draw and the contract holds 10 percent retainage.

That layout does two things. It pays you the $18,000 you can collect today, and it keeps a running record of the $2,000 you are still owed. Track that retained total across every invoice, because at close-out you bill the sum of it back. You can itemize the work and subtract the holdback in our contractor invoice generator.

For more on structuring your billing and the terms that go with it, see how to invoice as a contractor and net 30 payment terms.

When you get retainage back

You get retainage back when the job hits the release point in your contract. That is usually substantial completion or final acceptance, often once the punch list is signed off. You bill the accumulated retainage as its own draw, and the payer releases it.

Be honest with yourself about the timing. On a long job, retainage can tie up real money for months. A few percent of a large contract is a serious number to have sitting on someone else's books while you cover payroll and materials.

Two things help you actually collect it. Keep a clean record of every retained amount, so your final number is exact. And make sure approved change orders are reflected, since retainage gets held on that work too.

How retainage affects your lien rights and your final waiver

Retainage and your lien rights are tied together, and this is where contractors get burned. Your lien deadline often runs from when you last furnished labor or materials, not from when retainage is finally released. So the money can still be outstanding while your clock is running. Confirm your state's deadline and do not assume the holdback pauses it.

The bigger trap is the final waiver. Do not sign a final lien waiver before retainage is paid. A final waiver releases all of your remaining rights on the job, and if you sign it while retainage is still owed, you can give up your claim to money you have not collected. Make sure the retained amount, plus any approved change orders, is in the final number before you sign. We cover this split in final and partial lien waivers.

The state-rules warning: check yours

This is the part to take seriously. Retainage is governed by your contract and by state law, and the rules are not the same everywhere. Many states cap the percentage that can be held, set how and when it must be released, or require it to be held in a separate or interest-bearing account. The rules are often stricter on public projects than on private ones.

So treat any percentage or timing in this guide as the common case, not the law in your state. Confirm the cap, the release rules, and the deadlines that apply to your job before you rely on them. This is general information, not legal advice. When the dollars are big or the timeline is unclear, check your contract and your state's statute, or ask a construction attorney.