Contractual Retainage: The Money You "Earned" But Can't See

What Is Retainage and Why Does It Exist?

Retainage — also called retention — is a percentage of each progress payment that the client holds back until the project is substantially complete. It's typically 5% to 10% of the contract value, though it can vary by project or jurisdiction.

Retainage exists to give the client leverage: if the contractor doesn't complete the work, or if there are defects, the client has the retainage to cover the cost of finishing the job. It's a form of security — and it's a common source of cash flow strain for contractors.

How Retainage Shows Up in Your WIP Schedule

Retainage should be included in both your earned revenue and your amount billed. When you bill a progress payment, the full amount goes into "amount billed" — but only the net amount (minus retainage) is actually paid. The retainage stays on your balance sheet as a receivable.

In your WIP Schedule, retainage naturally creates an under-billed position equal to the retained amount. That's correct — you've earned that money, but you haven't collected it yet. The key is to track it separately so you know how much of your under-billing is normal retainage versus actual under-billing.

The Cash Flow Impact of Retainage

Retainage can tie up significant working capital. On a $10 million project with 10% retainage, you're leaving $1 million on the table until completion. For a contractor with multiple projects, that can mean millions of dollars in cash that you've earned but can't access.

The cash flow impact is even more acute for growing contractors. As you take on larger projects, your retainage balance grows — and so does your working capital requirement. You're financing the work out of pocket while waiting months or years to recover the retainage.

How to Manage Retainage Effectively

• Negotiate lower retainage upfront: In competitive markets, 10% is common — but some owners will accept 5% if you have a strong track record.
• Reduce retainage on schedule: Some contracts allow for partial release of retainage when the project reaches certain milestones. Negotiate this into your contract.
• Factor your retainage: Some lenders offer retainage factoring — they advance you a percentage of your retainage balance in exchange for a fee.
• Track it separately in your accounting system: Don't let retainage get lost in your general receivable balance. Track it by job so you know exactly what you're owed and when it's due.
• Submit your final paperwork promptly: The faster you complete your project and submit closeout documents, the faster you get your retainage.

Retainage and Bonding Capacity

When a surety evaluates your bonding capacity, they look at your working capital — and retainage is part of your working capital calculation. A large retainage balance can reduce your bonding capacity, even though it's an asset.

The problem is that retainage is not liquid cash. It's a receivable that may not be paid for months or years. Sureties discount it in their working capital calculations — which means it doesn't help you as much as cash or other receivables.

The Tax Implications of Retainage

Under the percentage-of-completion method, taxable income is based on earned revenue — not cash collected. That means you owe tax on your retainage in the year it's earned, even if you haven't received the cash yet.

This is a critical point for tax planning. If your company has a large retainage balance, you may owe tax on money you haven't yet collected. That's a cash flow problem — and one that requires careful planning.

Frequently Asked Questions

Is retainage always a percentage of the contract value?

Typically yes — but the percentage can vary. Some contracts have a fixed retainage amount, or a sliding percentage that decreases as the project progresses.

Can I bill retainage separately?

No. Retainage is not a separate line item — it's a percentage of your progress billings. You include it in the invoice, but you don't receive it until the project is complete.

What happens to retainage if the owner defaults?

If the owner defaults, your retainage is at risk. This is why many contractors require payment bonds — they protect your retainage if the owner fails to pay.

Is retainage regulated by law?

In some states and jurisdictions, retainage is regulated — with caps on the percentage or requirements for prompt payment. Always check the laws where you operate.