Invoice Factoring for Contractors: What It Costs and When It Makes Sense

Published August 2026 · 9 min read

Contractors run into the same squeeze constantly: the crew, the material and the payroll all get paid this week, and the invoice for the job gets paid in 45 days. Factoring exists to close that gap, and for some contractors it is the right call. It is also one of the most expensive money in the trades once you annualize it, and the marketing rarely presents it that way.

Factoring solves a timing problem, not a margin problem. The distinction decides whether it helps or compounds the issue.

How Factoring Actually Works

You sell an unpaid invoice to a factoring company at a discount. They advance most of the value now, collect from your customer directly, and remit the rest minus their fee. A typical structure on a $50,000 invoice:

• Advance: 85% — $42,500 lands in your account in one to two days
• Reserve: 15% — $7,500 held back until your customer pays
• Fee: 3% for the first 30 days — $1,500
• You receive in total: $48,500 on a $50,000 invoice

Because you are selling a receivable rather than borrowing, approval leans on your customer's credit more than your own. That is why factoring is available to contractors a bank would decline — and also why factors are picky about which invoices they will take.

The Number the Brochure Does Not Show

Three percent sounds modest. But you paid it to move money forward by 30 days, so the honest comparison is annualized: roughly 36 percent. Against a bank line of credit at 9 to 12 percent, factoring is three to four times the cost of capital.

That does not automatically make it wrong. If the $42,500 lets you take a job that nets $15,000 you would otherwise have turned down, the $1,500 fee is cheap. The error is using factoring as ongoing working capital rather than to capture a specific opportunity — at which point you have permanently given up three points of margin on every invoice.

Do that arithmetic against your actual margin before signing. If your net margin is 8 percent and factoring costs 3 points, you have handed over more than a third of the profit on that job. The profit margin calculator and the accounts receivable calculator will tell you quickly whether the trade is worth it.

Recourse vs Non-Recourse

With recourse factoring — the common and cheaper form — if your customer never pays, you buy the invoice back. The credit risk never actually left you.

Non-recourse costs more and shifts some risk to the factor, but the protection is usually narrower than the name implies. Many non-recourse agreements cover only customer insolvency — not a customer who disputes the workmanship, withholds over a punch list, or simply refuses to pay. In construction, where disputes are the common failure mode rather than bankruptcy, that distinction matters enormously. Read exactly what triggers the protection before paying for it.

Contract Terms Worth Reading Closely

• Monthly minimums. Many agreements require a minimum volume factored per month. A slow quarter means paying fees on invoices you did not need to sell.
• Notification. Most construction factoring is notification-based: the factor contacts your customer directly to collect. Decide how that lands with a general contractor you want repeat work from.
• Term and termination. One- and two-year agreements with early termination penalties are common. Confirm you can leave.
• Aging tiers. The headline rate covers the first 30 days. Ask what a 60- or 90-day invoice actually costs, since that is where the invoices you most want to factor tend to land.
• Lien and bond interaction. On commercial work, confirm how factoring affects your mechanics lien rights and any payment bond claim — this is worth a conversation with your attorney, not just the factor.

Cheaper Fixes to Exhaust First

For most contractors the cash gap is self-inflicted and considerably cheaper to close than 36 percent annualized.

Bill the day the work is done. Contractors who invoice at month end are financing their customers for an extra two weeks for free. Same-day invoicing from the field often removes the entire problem, and it costs nothing.

Bill on milestones, not at completion. Progress billing against a schedule of values means cash arrives during the job rather than 45 days after it ends. On commercial work this is standard practice — the AIA G702/G703 process exists precisely to solve this, and retainage is the piece contractors most often forget to track against it.

Move the financing to the homeowner. On residential work, consumer financing means the lender funds at closeout and you are not waiting on the customer at all. That is a structurally better answer than factoring your own receivable — see contractor financing options and GoodLeap for contractors.

The Honest Summary

Factoring is a legitimate tool for a timing problem: the work is done, the invoice is good, the customer pays reliably but slowly, and the cash unlocks the next job. It is a bad answer to a margin problem or a billing-discipline problem, because it makes both more expensive without fixing either. Fix your billing speed first, price the alternatives second, and treat factoring as the option you reach for when the opportunity it funds clearly outruns its cost.

Frequently Asked Questions