Invoice Factoring Calculator
Factoring is sold as a per-month rate. It's actually a 30–60%+ APR most of the time. This calculator converts a factoring offer into true annualized cost, accounts for customer payment timing, and compares it to a line of credit so you can see whether the speed and access are worth what you're paying.
Expensive · Total cost of factoring $250 (2.5% of invoice)
today (within 24–72 hours)
released minus fee when customer pays
Reserve ($1,500) − fee ($250).
≤15% competitive · ≤30% moderate · ≤50% expensive · >50% predatory.
- Effective APR of 36% is expensive even for factoring. If your customers are creditworthy, push for a lower fee or shop two or three more factors — the rate range on identical risk is wide.
- You're on recourse terms — if the customer doesn't pay, you buy the invoice back. For a customer you don't fully trust, ask the factor to quote non-recourse pricing (typically +50–150 bps) and treat the premium as credit insurance.
Reference rates are typical mid-market values, not your specific quotes. SBA 7(a) and bank LOC require qualification time and credit history; factoring funds in days regardless.
View the TypeScript implementation on GitHub: packages/calc/src/invoice-factoring.ts · view tests
What this means
Factoring is sold on a per-period rate — "just 2.5% per month" — that obscures the true annualized cost. A 2.5% per-30-day fee on a 30-day invoice with an 85% advance is roughly a 36% APR. Stretch the invoice to 60 days, and the rate per dollar-day stays the same; charge the fee on a 5-day quick pay and a per-period minimum can blow it past 180% APR. The "true cost" question matters because the alternatives — bank lines of credit at 9–14%, SBA 7(a) loans at ~12%, even credit cards at 25% — are mostly cheaper if you can access them in time.
That said, factoring earns its place when speed and access matter more than rate. New factor relationships fund in 24–72 hours; bank LOCs take weeks. Factoring is harder for the lender to revoke (each invoice is its own micro-transaction), which makes it more reliable in a downturn than a callable LOC. And factoring has no minimum credit profile on the business itself — only on its customers — so it's available to startups, post-bankruptcy operators, and businesses that bank lenders won't touch. The right question isn't "is factoring expensive?" (it is). It's "is the speed and access worth the spread over my best alternative?"
Worked example
A trucking company has a $25K invoice from a creditworthy broker on Net-45 terms. Payroll is due in 7 days. Two options:
Option A: Factor the invoice. 90% advance ($22,500 in 24 hours), 2.5% per 30 days, recourse, 45 days outstanding. Fee = 2.5% × (45/30) = 3.75% of face = $937.50. Effective APR = ($937.50 ÷ $22,500) × (365 ÷ 45) ≈ 33.8%— tier "expensive."
Option B: Existing $50K LOC at 14% APR. Draw $22,500 for 45 days. Cost = $22,500 × 14% × (45/365) = $388.36. APR is 14% by definition.
The LOC saves $549 on this invoice. But the LOC may already be partly drawn for other purposes, and a $549 difference may not be worth the bank dance for a trucking operator who doesn't have time. The right answer depends on three things: is the LOC available right now, what's the time cost of pursuing it, and what's your gross margin on this load? At 30% margin, $549 is 2% of profit; at 12%, it's 5%+. In trucking specifically, factoring is so structural that operators bake it into freight pricing and treat the cost as a fixed feature, not a deviation. In other industries, the math is closer to an emergency-only call.
Frequently asked questions
The information and tools on this website are for general educational purposes only and do not constitute financial, investment, legal, or tax advice. Consult a licensed professional for decisions specific to your situation.