A payment arrives, but it is less than the amount you expected. Before treating the difference as an error, check whether the contract allows retention or retainage and how it should have been calculated.
Retainage is money held back under a particular arrangement. It affects cash flow, but it is not the same thing as a discount, a tax deduction or an unpaid invoice caused by an administrative delay.
Where does retainage appear in construction billing?
A payment application normally reports the value of work completed and eligible stored materials, then subtracts retainage to show earned payment after withholding. The application may use one percentage for completed work and another for stored materials if the contract permits. The retained amount remains visible as part of the project balance until it is released or adjusted.
The owner may withhold retainage from the prime contractor, and the prime contractor may apply corresponding terms to subcontractors only as their agreements and law permit. Each tier needs a controlled ledger showing gross earned value, retainage withheld, retainage released, other authorized deductions, and net payment.
- Gross earned work and stored-material value
- Contractual retainage percentage and calculation base
- Cumulative retainage withheld and released
- Net certified amount and remaining balance
Worked retainage calculation
Assume prior approved work was $110,000 with 5% retainage, so prior earned payment after retainage was $104,500. During the current period, another $40,000 of work is approved. Applying the same 5% rate to the new work withholds another $2,000 and creates a current earned payment of $38,000.
Cumulative approved work is now $150,000. Cumulative retainage is $7,500 and cumulative earned payment after retainage is $142,500. Subtracting prior payments of $104,500 produces the $38,000 current request. This example excludes stored materials, tax, change orders, disputed work, and any authorized retainage reduction.
- Prior net earned: $110,000 − 5% = $104,500
- Current retainage: $40,000 × 5% = $2,000
- Current net request: $40,000 − $2,000 = $38,000
- Cumulative retained: $150,000 × 5% = $7,500
When can retainage change or be released?
The contract may reduce retainage after substantial completion, release it by phase, or hold part until final completion, correction of deficiencies, closeout documents, consent of surety, or another stated condition. Statutes can impose additional limits or deadlines. Record the specific condition rather than using a vague note such as payable later.
When retainage is released, show both the prior retained balance and the amount released so the transaction is auditable. A release does not erase the earlier history. If only part is released, identify the work, party, phase, and authority for the adjustment and preserve the approval with the payment record.
- Substantial or final completion milestone
- Punch-list and closeout-document status
- Contractual or statutory release deadline
- Written approval for partial or full release
How should retainage records be checked?
Recalculate retainage by schedule-of-values line when different rates or exclusions apply. Check whether stored materials, completed phases, approved changes, taxes, or other amounts belong in the base. Compare the current cumulative amount with every prior application and the accounting ledger before certifying a payment.
Keep the signed contract, amendments, applications, continuation sheets, certificates, deduction notices, completion evidence, releases, and payments together. Pocket Invoice can document an approved amount due on a general invoice, but it does not determine whether retainage is permitted or replace a required construction payment form.
- Apply the rate to the correct contractual base
- Reconcile every tier and prior billing period
- Record reasons and authority for adjustments
- Preserve release evidence with the final payment
Read the actual retention terms
Identify the rate or amount, the basis of calculation, any limits or changes during the project, and the conditions for release. Requirements may differ between public and private work and across jurisdictions.
Do not assume a percentage mentioned in an example is standard for your contract. Some arrangements treat different work or materials differently, and release may depend on defined milestones or documents rather than a single date.
Separate retention from other payment differences
For an illustrative 20,000 approved amount with 5% retention, 1,000 is retained and 19,000 would remain before other applicable adjustments. If the payment received is 17,000, the entire 3,000 difference should not simply be labeled retention.
Ask what explains the additional 2,000: a separate deduction, a disputed amount, a prior credit or an actual short payment. Keeping the categories distinct makes the next conversation much more useful.
| Illustrative figure | Amount |
|---|---|
| Approved value | 20,000 |
| Example retention: 5% | 1,000 |
| Expected amount before other adjustments | 19,000 |
| Actual payment received | 17,000 |
| Additional difference requiring explanation | 2,000 |
Track retained amounts as the project develops
Record retention against each application and maintain a cumulative total. Keep the calculation consistent with the contract, especially when approved changes or release stages alter the basis.
Retainage held from a subcontractor and retainage held from your business by the customer are separate relationships. Do not assume their payment or release terms are identical. Track each according to its agreement and applicable requirements.
Plan for the cash that arrives later
A profitable job can still strain cash if a portion of each payment is withheld while wages and suppliers must be paid. Include the timing of retention and its expected release in your cash planning.
Use realistic assumptions and keep uncertainties visible. Treat an expected release as an event requiring follow-up, not as cash already available. A delay in final documentation or an unresolved issue may affect the timing.
Prepare for release before the final week
Identify the required completion, acceptance, closeout or other supporting records and who approves them. Resolve known discrepancies while the project team and documents are still readily available.
When requesting release, provide a clear retained balance, references to relevant applications and evidence that the applicable conditions have been met. Keep the request separate enough that the reviewer can see what is being released.
If release is delayed, ask about the specific condition
Find out whether the issue is missing paperwork, unresolved work, approval timing or a disputed entitlement. Record the response and agreed next step. Repeatedly sending the same total does little if the reviewer is waiting for something else.
For a contractual or legal disagreement, use the process and professional advice appropriate to the project. General invoicing guidance cannot establish your right to a particular release date or amount.
Questions you may still have
Is 10% retainage required on every construction project?
No. Rates and limits depend on the contract and governing law. The federal rule discussed in this guide applies to its stated federal context, not every project.
Is retainage calculated on stored materials?
It depends on the contract, payment form, and applicable rules. The billing record should show the selected base and rate rather than combining unlike amounts without explanation.
How is released retainage shown?
Show the opening retained balance, release authorized for the period, remaining retainage, and resulting payment. Keep the approval and completion evidence with the record.