Invoice Factoring Cost Calculator

Follow the invoice through the transaction

Start with the eligible face value of the invoice. The advance percentage determines the initial payment; the difference is the gross reserve. Fees and any agreed adjustments affect what is released after collection.

For example, an 80% advance on a $50,000 invoice provides $40,000 initially and leaves $10,000 before fees in reserve. The reserve is not automatically a charge. It is money held back under the agreement, potentially available later after the required deductions.

The altLINE factoring calculator similarly separates advances, fees and final cash. Product structures can differ: FundThrough's pricing explanation describes its own advance and fee approach. Enter the terms you actually received rather than assuming all factors use the same structure.

Continue with Audit the calculation method or Business Loan Calculator for the next calculation.

Specify how the time-based fee is charged

A quoted fee can apply to invoice face value or another stated base. It can be prorated by days, charged for each started period, or follow an initial-period-plus-increment schedule. Those methods produce different answers.

This calculator's core fee comparison distinguishes daily proration of a stated 30-day fee from charging each started 30-day block. Keep the current prorated mode selected only if the agreement supports it. If the offer uses a different schedule, obtain the exact rule before treating the result as representative.

Add wire, service, setup or other known charges and identify when they are collected. An upfront deduction reduces usable cash now. A charge deducted from the reserve reduces the later release. Minimum-volume fees across a wider facility may need separate analysis.

Worked example: forty-five days to collection

Assume a $50,000 invoice, an 80% advance, a 2% fee per 30 days and payment after 45 days. These are illustrative terms. There are no other charges or disputed amounts.

The initial advance is $40,000 and the gross reserve is $10,000.

With daily proration, the factor fee is $50,000 × 2% × 45 ÷ 30 = $1,500. The later reserve release is $8,500, bringing total cash received to $48,500.

With a charge for each started 30-day block, 45 days occupies two blocks. The fee is $2,000, the reserve release is $8,000 and total cash received is $48,000. The same headline fee produces a $500 difference because the timing rule changed.

In the block-priced case, $2,000 is 5% of the $40,000 advance. Simple annualization is 5% × 365 ÷ 45, or approximately 40.56%. This annualized comparison is not a statutory APR, a forecast of repeated financing or a statement that factoring is legally a loan.

Understand the cost denominator

Dividing fees by the invoice amount measures the share of invoice value surrendered. Dividing by the initial advance measures cost relative to cash available early. Both can be useful if clearly labeled, but they answer different questions.

A larger reserve can reduce early cash even when the invoice-level fee is unchanged. Likewise, an upfront charge can reduce the advance you can spend. Compare cash received and payment timing with an alternative in the Business Loan Calculator.

For an operational view, place the initial advance and later release into the Business Cash Runway Calculator using realistic receipt dates. Faster cash can solve a timing problem without improving the underlying margin on the sale.

Separate factoring charges from customer disputes

A credit note, return or customer dispute can reduce the collectible invoice. That is not automatically a financing fee. A temporary reserve held pending resolution is also different from a permanent loss. Show the assumed adjustment separately and avoid calling every withheld dollar factoring cost.

The model does not determine recourse obligations, assignability, customer notification, collection rights or whether a factor must absorb a particular loss. Check the agreement, including what happens when the customer pays late or never pays.

Frequently asked questions

What this calculator answers

Factoring cost depends on invoice amount, advance, time outstanding, fee basis, other charges and reserve adjustments—not the fee percentage alone.

Audit the cash timing and cost of a written invoice-factoring offer.

Method and calculation order

The initial advance uses the entered advance rate. A prorated 30-day fee and other costs reduce the reserve release. Simple annualization divides cost by the advance and scales by days.

To compare this result with another relevant method, open the Line Of Credit Calculator. Related calculation for the next planning step.

Worked reference example

On a 100,000 invoice with 80% advance, a 2% 30-day fee and 500 other fees, initial cash is 80,000, modeled cost is 2,500 and final reserve release is 17,500.

How to use the result

Confirm recourse, notification, minimum volume, concentration, reserves, disputes, chargebacks, collections and what happens when the customer pays late.

Continue the workflow: Use the Business Loan Calculator to related calculation for the next planning step. Then use the Business Runway Calculator to related calculation for the next planning step.

What the calculator cannot know

Simple annualization is not statutory APR or IRR. The tool excludes rolling facilities, minimums across multiple invoices, recourse losses, legal assignment and tax.

Inputs, outputs and result meaning

Calculate advance, reserve, time-based factor fee, other fees, final release and a simple annualized cost from user-entered terms.

Inputs

Market and currency

Selects currency formatting and market terminology only; it does not insert tax, eligibility, underwriting, or product rules. Available choices are United States (USD), United Kingdom (GBP), Canada (CAD), Australia (AUD), New Zealand (NZD), and Ireland (EUR).

Invoice face amount

Eligible invoice amount accepted by the factor. Supported units are selected market currency.

Advance rate

Share paid initially. Supported units are percent (%).

Factor fee per 30 days

Fee percentage applied for each 30-day period or prorated period. Supported units are percent (%).

Days until customer pays

Scenario collection period. Supported units are days.

Other factoring fees

Wire, due-diligence, minimum, service or other entered fees. Supported units are selected market currency.

Expected dispute or dilution reserve

Scenario reduction for credits, returns or disputes. Supported units are percent (%).

Outputs

Modeled factoring cost

This is the primary result. The display rule uses up to 2 decimal places.

Initial advance

The display rule uses up to 2 decimal places.

Gross reserve

The display rule uses up to 2 decimal places.

Time-based factor fee

The display rule uses up to 2 decimal places.

Modeled final reserve release

The display rule uses up to 2 decimal places.

Modeled total cash received

The display rule uses up to 2 decimal places.

Simple annualized cost on advance

It is displayed in %. The display rule uses up to 2 decimal places.

The initial advance uses the entered advance rate. A prorated 30-day fee and other costs reduce the reserve release. Simple annualization divides cost by the advance and scales by days. Keep the result label, unit, selected mode, and stated limitations together when sharing the answer.

Primary sources and review status

• U.S. SBA — Manage cash flow
• Federal Reserve — Small business credit
• Business.gov.au — Finance

Sources and model boundaries checked 2026-10-08. CalculatorGeek Editorial Team verified this page for publication on 2026-10-16. Existing formulas, source dates, model boundaries, and professional-advice limitations remain in force.