What Is Retainage in Construction?

What is retainage in construction?

Retainage, also called retention or holdback, is a portion of payment withheld from work already earned. It is different from work you have not yet completed. The amount held remains part of the contract accounting until it is released, adjusted, or otherwise resolved under the agreement. Owners may hold retainage from the general contractor, and subcontract terms can determine how it is handled further down the payment chain.

If you earn $20,000 in an application period and the applicable rate is 5%, the holdback is $1,000 and the amount remaining before other adjustments is $19,000. Your payment application should keep the held amount visible so you can reconcile it with future releases.

Why do projects withhold retainage?

Retainage gives the party making payment a financial reserve while the work is being completed and reviewed. It can help address incomplete work, defects, or unresolved project obligations. The terms should explain how the amount is calculated and what must happen before it is released. A holdback is not a substitute for inspecting work, agreeing on changes, or following the contract’s payment process.

Typical retainage rates

Rates of 5% to 10% are common starting points, but they are not a universal rule. A contract may set different rates for installed work and stored materials, reduce the rate at a milestone, or use another permitted arrangement. The relevant rules can differ by state, public or private project, contract size, and the parties involved.

For example, Washington’s public improvement statute generally limits retained amounts to 5% of money earned, with stated exceptions including certain federally funded transportation projects. Pennsylvania’s procurement law sets different limits for certain government contracts and contains separate provisions for its Department of General Services. These are examples, not a rate table for every project in either state. Check the current law and your particular contract before choosing a rate.

How to calculate retainage

Multiply the eligible earned amount by the agreed retainage rate. For cumulative progress billing, calculate the amount held to date, then account for previously held amounts and any approved release to find the current-period effect. If work and stored materials have separate rates, calculate them separately before adding the results.

For example, $30,000 of eligible installed work at 10% produces $3,000 held. If $10,000 of eligible stored materials is held at 5%, that adds $500, for $3,500 held before any release. Enter your own line amounts, previous retainage, and applicable rates in the free retainage calculator to review the current period and an approved release.

When is retainage released?

The release date depends on the contract, project milestones, and applicable law. At substantial completion, the work may be usable for its intended purpose even though some items remain. An agreement can provide for part of the holdback to be released at that point while reserving an amount for unfinished work or outstanding requirements. The milestone alone does not automatically authorize payment in every contract.

Final completion generally follows completion of remaining work and the required closeout process. Review what your customer requires: an approved final application, punch-list signoff, warranties, or lien waivers may be relevant. Track the submission date and the payment deadline specified for your project, and follow up on any missing approval or disputed amount.

How retainage affects subcontractor cash flow

Retainage creates a gap between earning revenue and receiving cash. Crews, materials, insurance, and equipment may need to be paid while the held amount remains outstanding. On a $200,000 subcontract with 10% retained on all eligible work, the holdback could reach $20,000 before releases or adjustments. That is cash the business cannot use for the next payroll or supplier invoice yet.

Forecast the gap before signing: model each billing period, expected approval dates, retainage rates, and the likely release milestone. Track held balances by project and by application rather than treating them as an unexplained difference in cash received. Ask the general contractor which documents are needed for release, and compare the payment certificate with your records each period. Early preparation helps the team identify missing paperwork before final closeout.

Retainage in your AIA payment application

In AIA-style billing, the G703 continuation sheet supports the line-by-line progress and retainage figures. The G702 payment application summarizes completed work, stored materials, retainage, prior certificates, and the current payment due. Reconcile the detail with the summary and the last certified application before submission.

If the contract allows retainage to be reduced after a milestone, check whether that change applies to previously earned work, future work, or both. A 50% completion milestone does not itself halve retainage or release money unless the applicable terms provide for it and any required approval has been obtained.

Frequently asked questions

Is retainage the same as a discount? No. Retainage is an amount held from an earned payment; a discount changes the price according to its own terms. Track holdbacks separately from price reductions and approved change orders.

Does retainage apply to stored materials? It can, depending on the contract. Verify whether materials are eligible for billing, what evidence is required, and whether their rate differs from the rate applied to completed work.

Does 50% completion release half the holdback? Not automatically. Some agreements reduce a rate or release an amount at a milestone; others use different conditions. Confirm the exact method before changing your application.

Calculate retainage and prepare your next pay application

Use the retainage calculator to model work, stored materials, and an approved release. Then open PayAppKit’s free billing tools to reconcile your schedule of values and payment summary and export a PDF. Review the result against your agreement and the previous certified application before sending it to your customer.