How Invoice Factoring Works for Contractors (2026)

What Is Invoice Factoring for Contractors?

Invoice factoring — also called accounts receivable factoring — is a financing arrangement where a contractor sells an unpaid invoice to a third-party company (the “factor”) in exchange for immediate cash. The factor pays the contractor most of the invoice value upfront, then collects the full invoice amount directly from the GC or project owner when payment is due.

It is not a loan. You’re not borrowing money and promising to repay it. You’re selling a financial asset — a receivable — that you already earned by performing work. This distinction matters for two reasons: first, it doesn’t add debt to your balance sheet in the traditional sense; second, approval is based primarily on the creditworthiness of the party paying the invoice (your GC), not just your own credit profile.

For contractors, this solves a fundamental problem: you’ve submitted an approved pay application for $200,000 in work you completed last month. Your GC is reliable and will pay — but not for 45–60 days. Your payroll runs every Friday. Your material suppliers want payment in 30 days. Invoice factoring converts that $200,000 receivable into $160,000–$180,000 in your account within 24–48 hours.

Read more about accounts receivable financing for contractors to see how factoring compares to other receivables-based products.

How the Factoring Process Works Step by Step

Understanding the mechanics helps you evaluate whether factoring is right for your situation and what to expect:

Step 1: You submit an invoice (or pay application) to the factoring company

After performing work and submitting a pay application to your GC, you send a copy of that approved invoice to the factor. The invoice needs to represent work already performed, not future work. For construction, this is typically a monthly pay application (AIA G702/G703 or similar) that has been approved or is in the approval process.

Step 2: The factor verifies the invoice and approves it

The factoring company confirms that: (a) the work has been performed, (b) the GC is creditworthy and in good standing, (c) there are no offsets or disputes against the invoice, and (d) no liens or legal issues cloud the receivable. This verification step typically takes 24–48 hours on a first submission and can be same-day for established relationships.

Step 3: The factor advances 80–90% of the invoice value

Once approved, the factor wires 80–90% of the invoice face value directly to your bank account. On a $200,000 invoice, that’s $160,000–$180,000. This happens within 24–48 hours of approval.

Step 4: Your GC pays the factor

When payment is due (net-30, net-45, net-60, etc.), your GC remits payment directly to the factor — not to you. The factor notifies your GC of this arrangement (notice of assignment) at the outset. The GC sends the full $200,000 to the factor.

Step 5: The factor remits the remaining balance minus the factoring fee

Once the factor receives payment from the GC, they calculate their fee (typically 1.5–5% of the invoice face value per 30-day period, depending on how long it took the GC to pay) and wire the remaining balance to you. On our $200,000 example, if the fee is 3% for a 45-day payment cycle, the fee is $6,000. You receive $200,000 (advanced $180,000 + remaining $20,000) minus $6,000 fee = net $14,000 additional at settlement.

Your total proceeds: $180,000 upfront + $14,000 at settlement = $194,000 net on a $200,000 invoice.

Invoice Factoring vs. Working Capital Loans

Both factoring and working capital loans solve the contractor cash flow problem, but they work differently and suit different situations.

Invoice Factoring:

• Based on the value of specific invoices from creditworthy GCs
• No fixed monthly payment (the GC’s payment to the factor settles the advance)
• Scales automatically with your invoice volume
• GC’s creditworthiness matters more than yours
• Fee is per-invoice, per-period (ongoing relationship is additive)
• Better for: contractors with consistent, high-value invoices from institutional GCs; situations where you need cash tied to specific receivables

Working Capital Loans:

• Based on your business revenue, bank statements, and credit profile
• Fixed daily or weekly repayment over a set term (6–24 months)
• Provides a lump sum regardless of current invoice volume
• Your creditworthiness is the primary factor
• Fixed cost (factor rate or interest rate applied to loan amount)
• Better for: mobilization costs before billing begins, general operating capital, situations where there’s no specific large invoice to factor

Which is faster? Both can be fast — factoring typically funds in 24–48 hours; working capital loans from online lenders also often fund in 24–72 hours. Neither is dramatically faster than the other in most cases.

Which is better? That depends on your specific situation. A contractor with $100,000 in approved pay applications from a creditworthy GC might prefer factoring — it’s directly tied to money you’ve earned. A contractor who needs $50,000 for materials before billing begins would need a working capital loan, since there’s no invoice yet to factor.

Many contractors use both: a working capital line for operational float and factoring for specific large invoices when the wait is particularly long.

Factoring Rates and Fees

Understanding factoring costs is essential for evaluating whether it makes economic sense on a given invoice.

Factoring fee structure: Most factors charge a percentage of the invoice face value for each 30-day period (or partial period) that elapses between the advance and GC payment. Common ranges:

• Creditworthy GC, short payment period (30 days): 1.5–2.5%
• Standard commercial terms (45–60 days): 2.5–4%
• Slower payment cycles (60–90 days): 3.5–5%

Some factors charge a flat fee per period; others structure fees weekly (0.5–1.5% per week). Read the contract carefully to understand the exact fee structure.

Advance rates: 80–90% is the standard range. Higher advance rates (closer to 90%) are available for invoices from large, creditworthy GCs (major institutional general contractors, public owners). Lower advance rates may apply to smaller or less creditworthy GC customers.

Other fees: Some factors charge application fees, setup fees, or minimum monthly volume requirements. Read the full agreement. Ask specifically about: minimum factoring volume, fees if the GC pays late (beyond 90 days), and whether you can factor selectively (not all invoices) or must factor a minimum percentage of your total receivables.

Is factoring expensive? Compared to a traditional bank loan (5–8% annually), yes. But traditional banks don’t provide 24-hour funding based on receivable value. The relevant comparison is: what does it cost you to not have the money? If you’re turning down projects, paying crew overtime on a rush job, or using personal credit cards at 22%, factoring at 3% for 45 days (roughly 24% annualized) might be cheaper than your alternatives — and it scales with your work volume.

What Makes a Contractor Invoice Factorable

Not every invoice can be factored. Factors look for specific characteristics:

Creditworthy GC or owner: The factor is effectively lending against the GC’s promise to pay. They need to be confident the GC will pay. Large institutional GCs (Turner, Skanska, Whiting-Turner, regional commercial GCs with established track records) are ideal factoring counterparties. An unknown small GC with no credit history may not be approved.

Approved or approvable pay application: The invoice should represent completed work that has been (or will be) approved by the GC. An invoice that is in dispute, has known deficiencies, or is subject to back-charges is difficult to factor. Factors may ask for the approved pay application, the schedule of values, and the current G702/G703 or comparable billing document.

No liens or legal disputes: If a mechanic’s lien has been filed against the project, or if there’s active litigation between you and the GC, factors will generally decline. Clear, undisputed receivables are what factors want.

No assignment restrictions: Some contracts include anti-assignment clauses that prohibit the contractor from assigning its right to payment to a third party. Read your subcontract. If an anti-assignment clause exists, factoring may violate your contract.

Which Contractors Use Factoring Most

Factoring is most commonly used by:

• Electrical and mechanical subcontractors with large monthly pay applications ($150,000–$500,000+) from commercial GCs
• Drywall and framing subcontractors on large multifamily or commercial projects where billing cycles are monthly and retainage is significant
• Concrete subcontractors with high material costs and monthly billing on commercial foundations, parking structures, or site work
• Roofing and waterproofing contractors on large commercial re-roofing projects
• HVAC contractors with long project durations and substantial equipment/material costs up front

It’s less commonly used (but still applicable) by smaller residential contractors, since residential owners are less creditworthy counterparties than institutional GCs.

Pros and Cons of Invoice Factoring

Advantages:

• Immediate cash from work you’ve already done
• No fixed monthly debt service payments
• Scales with your revenue (more invoices = more available)
• GC creditworthiness, not just yours, drives approval
• Flexible — factor selectively as needed

Disadvantages:

• Cost is higher than bank lines of credit (though usually faster and more accessible)
• GC is notified of the factoring arrangement
• Retainage cannot be factored
• Disputes or back-charges can prevent factoring specific invoices
• Anti-assignment clauses in some subcontracts may prohibit it

How to Apply for Invoice Factoring

Applying for construction invoice factoring is simpler than applying for a bank loan:

1. Contact a factor: Many online and specialty construction factors can be found through lender-matching services.
2. Submit basic business information: Company name, years in business, revenue, and a sample invoice or pay application.
3. Provide GC information: The factor needs to evaluate the creditworthiness of your GC customers.
4. Execute a factoring agreement: Sets the terms — advance rate, fee structure, recourse provisions, minimum volumes.
5. Submit your first invoice: The factor verifies it, notifies your GC, and funds you within 24–48 hours.

See what funding options may be available for your contracting business, including invoice factoring and other receivables-based products that can convert your pending payments into working capital today.

Frequently asked questions

How fast can I get money through invoice factoring?

Most factoring companies fund within 24–48 hours of approving an invoice. The first submission may take slightly longer (3–5 days) while the factor verifies the GC and your account, but subsequent submissions in an established factoring relationship are often same-day or next-day.

Does invoice factoring affect my relationship with my GC?

Yes, but usually not negatively. The factor will notify your GC that payment should be remitted to the factor (this is called a notice of assignment). Most institutional GCs are familiar with factoring and handle it routinely. Some contractors are concerned about this, but in practice GCs rarely view factoring negatively — they understand subcontractor cash flow realities.

What's the difference between recourse and non-recourse factoring?

In recourse factoring, if the GC doesn't pay the invoice, you (the contractor) are responsible for repaying the advance. In non-recourse factoring, the factor absorbs the loss if the GC doesn't pay due to credit-related reasons (like bankruptcy). Non-recourse factoring costs more. Most construction factoring is recourse because GC bankruptcy is relatively rare.

Can I factor retainage?

Generally no. Retainage is not a due-and-payable receivable — it's a contingent amount held until project completion conditions are met. Factoring companies typically will not advance against retainage because the GC has no obligation to pay it until those conditions are satisfied.

What types of contractors use invoice factoring most?

Electrical, mechanical, plumbing, drywall, framing, roofing, and concrete subcontractors use factoring frequently — any sub with large institutional GC customers, consistent pay application cycles, and a gap between labor/material costs and draw payment. Specialty trades with high-value invoices and creditworthy GCs are ideal factoring candidates.