Your factor doesn't advance the whole invoice — it holds back a reserve and releases it later, minus the fee. The reserve isn't a charge, but it quietly ties up your cash. Here's how much, and a calculator that shows what's trapped at any moment.
A factoring reserve (holdback) is the 3–10% of each invoice your factor withholds until your broker pays, then refunds minus the fee. It isn't an extra charge — but at a 5% reserve, a $40k/mo carrier keeps ~$3,000 tied up in reserve continuously.
Advance/reserve ranges from published 2026 freight-factoring guides (Porter, OTR Solutions, altLINE, FreightWaves, Resolve). Trapped reserve = daily factored volume × days-to-pay × reserve %. Updated June 2026.
Enter your average invoice, how many you factor a month, your advance rate, your factoring fee, and how long your brokers take to pay. This shows the reserve held on each invoice, your cash today, the net rebate you get back when the reserve releases (reserve minus the fee), and — the number no rate sheet shows you — how much of your own cash is trapped in reserve at any time. Assumptions: reserve % = 100 − advance %; net rebate = (reserve % − fee %) × invoice; trapped reserve = (monthly volume ÷ 30.4) × days-to-pay × reserve %.
Reserve % = 100 − advance %. Reserve held = invoice × reserve %. Net rebate at release = (reserve % − fee %) × invoice (the fee is netted from the reserve when the broker pays). Cash trapped = (monthly volume ÷ 30.4) × days-to-pay × reserve % — the rolling balance of reserves still held while you wait on payment. For your full all-in cost with ACH fees and minimums, use the factoring true-cost calculator.
Here's the part that trips people up. A 95% advance with a 5% reserve does not mean factoring costs you 5%. You get the reserve back — minus the factoring fee — when your customer pays. The advance rate only decides how much of your money you get now versus later; the fee is the only piece you actually lose. Same $2,500 invoice, same 3% fee, different advance rates:
| Advance rate | Reserve % | Cash today | Rebate at release | Total you keep |
|---|---|---|---|---|
| 90% | 10% | $2,250 | $175 | $2,425 |
| 92% | 8% | $2,300 | $125 | $2,425 |
| 95% | 5% | $2,375 | $50 | $2,425 |
| 97% | 3% | $2,425 | $0 | $2,425 |
| 98% | 2% | $2,450 | −$25 | $2,425 |
Total kept = invoice − fee = $2,500 − $75 = $2,425 in every row. A higher advance just front-loads more of it (at 98% you even get $25 of the fee back later). The reserve is your cash on delay, not a charge. At a 3% fee, a 97% advance leaves nothing in reserve to refund; a 98% advance means the factor recovers the last 1% from a later rebate.
Because a slice of every invoice stays in reserve until the broker pays, at steady state you always have a rolling pile of your own money sitting with the factor. The longer your brokers take and the higher your reserve, the bigger that trapped balance. For a carrier factoring $40,000/month:
| Reserve % | 30-day pay | 45-day pay | 60-day pay |
|---|---|---|---|
| 3% reserve (97% advance) | $1,184 | $1,776 | $2,368 |
| 5% reserve (95% advance) | $1,974 | $2,961 | $3,947 |
| 8% reserve (92% advance) | $3,158 | $4,737 | $6,316 |
| 10% reserve (90% advance) | $3,947 | $5,921 | $7,895 |
Trapped reserve = (monthly volume ÷ 30.4) × days-to-pay × reserve %. This is interest-free working capital sitting with the factor. It's not lost — it cycles back as brokers pay — but it's cash you can't use for fuel or the next load. Slower-paying brokers and a higher holdback both swell it; pushing your advance up shrinks it.
The reserve is the factor's safety cushion. On a recourse agreement — about 85% of trucking deals — if a broker short-pays, disputes, or goes under, the factor can claw that invoice back out of your reserve instead of chasing you for a check. It also covers chargebacks, fuel-advance balances, and the factoring fee itself. That's why a brand-new authority with no track record usually starts at a lower advance (bigger reserve) and earns a higher advance as the factor watches your brokers pay clean. See factoring for new authority for the starting terms a new MC should expect.
Then put the whole picture together: your true all-in rate with ACH fees and minimums in the factoring true-cost calculator, what your rate should be in the rates by volume & invoice size guide, the full effective-APR benchmark in the 2026 Freight Factoring Rate Index, and how the fee lands in your pocket with the take-home pay and break-even rate tools.
Estimates and modeled benchmarks for planning only — not financial advice, and not a quote. Confirm exact advance, reserve, and release terms with the factor. Last updated June 2026. Built by TruckMargin.
The reserve (holdback) is the part of each invoice your factor doesn't advance up front — usually 3–10%. It's held until your broker or shipper pays, then released to you minus the factoring fee. A 95% advance means you get 95% now and the remaining 5%, less the fee, when the load is paid.
No — it's your money, not a fee. You get it back minus the factoring fee once the customer pays. What it costs you is timing: part of every invoice is locked up until the broker pays, sometimes 30–60 days out. The only real charge is the factoring fee itself.
Roughly your daily factored volume × days-to-pay × reserve %. A carrier factoring $40k/month at a 5% reserve with 45-day pay has about $3,000 sitting in reserve at any time; at a 10% reserve, around $6,000. The calculator above shows your own number.
Often yes. As you build a clean payment history, many factors raise your advance rate (lowering the reserve) — say 90% to 95% or 97%. Some release reserves on a weekly schedule rather than per invoice, freeing cash sooner. Ask how and when reserves release before you sign.
On a recourse deal, an unpaid invoice is recovered from your reserve or future advances — the reserve is the factor's cushion. When you leave, the reserve releases only after open invoices clear, commonly 60–90 days. Read the termination and reserve-release terms first.
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