What retainage really costs by the time you collect it

Retainage is easy to ignore. It has no due date, it sits on no one's to-do list, and everyone assumes it shows up eventually. But it is usually the slowest dollar in the business — and by the time you collect it, it has cost more than most line items you actively manage.

Here is the cost, one piece at a time.

Take a simple example. A 40 million dollar shop runs 24 million through contracts that hold 10 percent retention. That is 2.4 million withheld over the year.

Now say the average dollar of retention waits eight months for release. Spread over the year, that keeps about 1.6 million outstanding at any given time.

If your line of credit costs 10 percent, carrying that balance costs about 160,000 a year.

That is interest paid on money your customers already owe you.

These are example numbers, not benchmarks. Swap in your own contract mix, retention rate, release lag, and borrowing rate — the method holds, and the number becomes yours.

160,000 looks minor next to 40 million in revenue. Profit is the honest comparison. At a 6 percent net margin, it takes about 2.7 million of revenue to earn 160,000.

Put plainly: nearly a month of sales, worked to cover the interest on your own retention.

Ordinary receivables support your borrowing base. Retainage usually does not — asset-based lines commonly exclude it outright, or exclude anything older than 90 days, which retainage is almost by definition.

Back to the example: 1.6 million of ordinary AR at an 85 percent advance rate would support about 1.36 million of availability. The same balance in retainage may support none. When cash is tight, that is the gap — and it stays invisible while retainage sits buried inside trade AR on the aging.

The eight-month lag is rarely one long wait. It is a stack of small, fixable delays:

• Retention is never tracked as its own balance, so nobody is watching it.
• The closeout package — manuals, as-builts, lien waivers — trails the finished work by weeks, because it is nobody's job.
• Punch-list items are done in the field but the sign-off never comes back on paper.
• Change orders performed but not yet billed keep the final application open.

None of that is a customer refusing to pay. It is documents and sequence — which means it is fixable from your side.

Three moves, in order of effort:

• Pull retainage out of trade AR. Age it by job, with a named owner and a target release date. A balance someone watches gets collected.
• Price the carrying cost into the next bid, at the rate you actually borrow.
• Then negotiate: retention that steps down from 10 to 5 percent at half completion, release on completed phases, or a retainage bond where the premium beats the interest. More of this is negotiable than most shops ever ask.

The number is usually bigger than people expect — often bigger than the contingency sitting next to it in the estimate.