Invoice factoring is when you sell your unpaid customer invoices to a factoring company for immediate cash. The factor typically advances most of the invoice value upfront, collects from your customer, then pays you the rest minus its fee. It makes sense when slow-paying but reliable business customers are starving you of cash, and when the profit on the work comfortably exceeds the factoring cost.
This guide is for business-to-business companies waiting 30, 60 or 90 days to get paid while payroll comes due every two weeks. You'll see how the mechanics work, what factoring really costs once you annualize it, a simple test for whether it's worth it, and the contract terms that catch owners off guard.
How invoice factoring works
- You do the work and invoice your customer as usual, on your normal terms.
- You submit the invoice to the factor. The factor checks the customer's creditworthiness, since your customer is the one who will pay.
- The factor advances a percentage of the invoice, often within a day or two. The rest is held back as a reserve.
- Your customer pays the factor, usually to a bank account the factor controls. In most arrangements the customer is told to pay the factor directly.
- The factor releases the reserve minus its fees, which usually grow the longer the customer takes to pay.
Because the factor is really betting on your customer's ability to pay, factoring is often available to young businesses or owners with thin credit, as long as their customers are established companies or government agencies. That's its main appeal. It doesn't help if your customers are consumers or small, shaky firms.
Recourse versus non-recourse
With recourse factoring, if your customer doesn't pay, you must buy the invoice back or replace it. With non-recourse factoring, the factor absorbs the loss if the customer can't pay because of insolvency, though usually not if they dispute the work. Non-recourse costs more, and the fine print defines exactly which non-payments are covered.
Worked example: what factoring really costs
Suppose a hypothetical commercial cleaning company has $40,000 of invoices to a property management firm that reliably pays in about 60 days. A factor offers an 85% advance and a fee of 3% of the invoice value for each 30 days the invoice is outstanding.
- Advance paid immediately: $40,000 × 85% = $34,000
- Fee for 60 days: $40,000 × 3% × 2 periods = $2,400
- Reserve released after the customer pays: $40,000 − $34,000 − $2,400 = $3,600
- Cost relative to the cash you actually got early: $2,400 ÷ $34,000 ≈ 7.06% for 60 days
- Annualized: 7.06% × (365 ÷ 60) ≈ 43% a year
"Three percent" sounds modest. Measured as the cost of the money you actually received early, over the time you had it, it's expensive, well above what a typical bank line of credit costs. Fees are also structured in many ways: flat fees, tiered fees by days outstanding, plus application, processing, wire or minimum-volume charges. Always convert the full cost into dollars on a real invoice.
Notice too that slower payment raises the cost. If the property manager stretched to 90 days, the fee would rise to $3,600 and the reserve released would fall to $2,400.
When does invoice factoring make sense?
Use this test: factoring makes sense when the profit you can earn or protect with the early cash is clearly larger than the factoring cost, and cheaper financing isn't available in time.
Imagine the cleaning company is offered a new hospital contract worth $25,000 a month at an 18% gross margin, on 60-day terms. It can't cover two months of extra payroll before the first payment arrives.
- Gross profit per month: $25,000 × 18% = $4,500
- Factoring cost per month's invoice (60 days at 3% per 30): $25,000 × 6% = $1,500
- Profit after factoring: $4,500 − $1,500 = $3,000 a month
Factoring turns a contract the company couldn't accept into one that earns $3,000 a month. That's a sensible use. Compare a business with an 8% gross margin: 8% of $25,000 is $2,000, and $1,500 of it would go to the factor. That's a thin return for the risk and effort.
Factoring tends to fit when:
- Your customers are creditworthy businesses or agencies that pay slowly but reliably.
- You're growing faster than your cash can support, and margins are healthy.
- You don't yet qualify for a bank line of credit, or need cash faster than a bank can move.
- The need is temporary, with a plan to move to cheaper financing as the business matures.
It's a poor fit when margins are thin, when customers are unreliable, or when factoring is covering ongoing losses rather than a timing gap. If slow collection is the core problem, fix it at the source first. Our guide on improving days sales outstanding covers how, and our explainer on net 30, 60 and 90 terms shows what long terms really cost you.
How factoring compares with other options
| Option | What you're qualifying on | Speed | Relative cost | Main trade-off |
|---|---|---|---|---|
| Invoice factoring | Your customers' credit | Fast once set up | High | Customers usually pay the factor; contract minimums |
| Invoice financing (accounts receivable loan) | Your receivables as collateral | Fast to moderate | Moderate to high | You still do collections; you owe the loan regardless |
| Bank line of credit | Your business's financial history and credit | Slow to set up, instant to draw | Usually lowest | Harder to qualify for; may need collateral |
| Merchant cash advance | Your future card sales | Very fast | Often very high | Daily repayments squeeze cash |
| Deposits or shorter terms from customers | Your negotiating position | Varies | Free, or a small discount | May cost some deals |
Before choosing a costly option like a merchant cash advance, compare the annualized cost of each on the same basis. The ranking is often clearer than the sales pitches suggest.
What to check in a factoring agreement
Factoring contracts vary a lot, and the headline rate is only one term. Read for these before signing:
- Fee structure: how fees accrue (per 10, 15 or 30 days), and every additional charge
- Advance rate and reserve: when and how the reserve is released
- Recourse terms: what happens and how quickly you must repay if a customer doesn't pay
- Minimum volume: whether you must factor a set amount each month, and the penalty if you don't
- Whole-ledger requirement: whether you must factor all invoices or can choose which ones (spot factoring)
- Contract length and exit fees: automatic renewals and termination charges
- Liens: whether the factor files a lien on all business assets, which can block other financing
- Customer contact: how the factor will communicate with your customers and handle collections
Have an attorney review the agreement before you sign. The lien, recourse and termination clauses in particular can have consequences long after the first invoice is paid.
Common invoice factoring mistakes
- Judging cost by the headline percentage. A "2% fee" can mean very different annual costs depending on how long invoices stay out. Convert to dollars and annualize.
- Factoring low-margin work. If the fee eats most of the profit, you're working for the factor. Run the margin test first.
- Not telling customers. A surprise notice asking them to pay a different company can confuse or worry them. Explain it yourself beforehand as a normal cash management tool.
- Signing long contracts with volume minimums. If your need is temporary, favor short terms or spot factoring, even at a slightly higher rate.
- Using factoring to hide a deeper problem. If the business is unprofitable, faster cash just speeds up the losses. Fix pricing and costs first.
- Never planning an exit. Set a goal to build reserves or qualify for a bank line within a defined period.
Where AI can help
AI tools are useful for the analysis before you commit. Export your accounts receivable history and ask an assistant to calculate each customer's average days to pay, which tells you which invoices would be cheap or expensive to factor. You can also paste in two factoring proposals and ask it to calculate the total dollar cost and annualized rate on a sample invoice under each, and to list every fee mentioned.
Read the actual contract yourself, and have it reviewed. An AI summary can miss a clause about liens, renewals or recourse timing, and those clauses can matter more than the rate.
Frequently asked questions
Is invoice factoring a loan?
Technically no. In most factoring arrangements you're selling the invoices rather than borrowing against them. Invoice financing, by contrast, is a loan secured by your receivables. The practical difference shows up in who collects from customers and who carries the risk if they don't pay.
Will my customers know I'm factoring?
Usually, yes, because they're instructed to pay the factor. Some factors offer arrangements where customers aren't notified, but these are less common and often cost more. Factoring is widespread in industries like trucking, staffing and manufacturing, so many business customers are used to it.
Can I factor invoices with bad credit?
Often, yes. Factors focus mainly on your customers' creditworthiness, not yours. Your own history, liens, tax issues and any disputes can still affect approval and pricing.
What is spot factoring?
Spot factoring lets you sell individual invoices as needed rather than committing your whole receivables ledger. It's typically more expensive per invoice but avoids long contracts and minimums, which suits occasional or one-time needs.
Key takeaways
- Factoring converts unpaid invoices to cash quickly by selling them to a factor.
- Its cost looks small per invoice but is often high when annualized; always calculate it in dollars.
- It makes sense when healthy margins on the work clearly exceed the factoring cost and cheaper options aren't available in time.
- Read the contract for recourse, minimums, liens and exit fees, and have an attorney review it.
- Treat factoring as a bridge, with a plan to move to cheaper financing.
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