Invoice financing is a way to borrow against invoices you have already sent but not yet been paid for. A lender advances most of the invoice value now, you carry on chasing the client yourself, and when they pay you settle the advance plus a fee. It exists for one specific gap: the weeks between finishing the work and the money actually arriving.
It is worth understanding before you need it, because the pricing is quoted in a way that hides how expensive it can get. Fees are advertised as small weekly percentages, which sound modest next to a bank rate and are not. What follows is how the mechanism works, what the published figures actually say, and the cheaper levers worth ruling out first.
How invoice financing actually works
The basic process
You submit one or more unpaid invoices to a lender as collateral. The lender advances a percentage of the face value up front. Most invoice financing companies advance up to 85% to 90% of the invoice value, and it is possible to receive up to 100% (Fundera, checked 7 September 2026). NerdWallet puts the same ceiling at up to 90% of invoice value (NerdWallet, checked 7 September 2026). When your client pays, you repay the advance plus the accrued fee and keep the difference.
What lenders actually look at
Because the invoice is the collateral, the assessment points at your customer rather than at you. Lenders weigh the quality of your invoices and your customers' repayment history (Fundera, checked 7 September 2026). In practice that means a solid business with one shaky client can find that client's invoices refused, and there is no single published minimum for time in business or revenue across the industry, so the answer varies by lender.
The two shapes it comes in
Some lenders will finance a single invoice at a time, which suits an occasional gap rather than a standing arrangement. Others set up a revolving facility backed by your receivables as a whole, so the available amount rises as you issue invoices and falls as they get paid. The second shape costs more to leave open but removes the per invoice application, and which one a lender offers is worth asking before you compare headline rates.
Invoice financing versus invoice factoring
Who collects from your customer
The two terms get swapped freely and they are not the same arrangement. With invoice financing you retain ownership of the invoices and you collect payment from your customers. With invoice factoring the factoring company advances a portion of the invoice value and then collects payment directly from your customer (NerdWallet, checked 7 September 2026). Fundera frames the same split as borrowing against invoices versus selling them to the factoring company at a discount (Fundera, checked 7 September 2026).
Why that difference reaches your client
If you are still the one collecting, your client's experience does not change and they generally have no reason to know a lender is involved. Under factoring they are typically told to pay a third party instead of you, which is the part businesses with long standing clients tend to object to, more than the fee itself. If factoring is the option you are actually weighing, we have a fuller breakdown of how it works, including recourse and non recourse terms, in What is invoice factoring.
Check that a reminder was not the only thing missing
Billbooks sends automatic payment reminders on every paid plan, so an invoice that is simply sitting forgotten in someone's inbox follows itself up. Free for 30 days, no credit card needed.
What invoice financing actually costs
The published fee ranges disagree, and the unit is why
This is the number to read carefully. Fundera describes a flat fee of between 1% and 5% of the total invoice value for each week it takes your customer to pay (Fundera, checked 7 September 2026). NerdWallet lists 0.5% to 2% per week, or 1% to 5% per month, and separately describes lenders who charge an interest rate of between 10% and 40% plus a platform, origination or service fee of 1% to 5% (NerdWallet, checked 7 September 2026). Note that 1% to 5% appears in both, attached to a week in one source and to a month in the other. That is a fourfold difference in cost on the same headline number, so confirm the unit in writing on any offer before you compare two of them.
A worked example
Fundera works it through on a $100,000 invoice due in 30 days. The financing company advances 85%, or $85,000, and charges 3% of the invoice for each week the customer takes. The customer pays in two weeks, so the fee is $6,000, being $3,000 a week, and Fundera puts the effective cost at an estimated APR of nearly 85% (Fundera, checked 7 September 2026). NerdWallet runs a similar sum at a lower weekly rate: a $100,000 invoice at a 2% weekly fee paid in two weeks costs a $4,000 fee, an approximate APR of 53% (NerdWallet, checked 7 September 2026).
What the annualised figure does and does not tell you
An APR in the fifties or eighties looks alarming beside a term loan, and the comparison is only partly fair. You are not borrowing for a year, you are borrowing for the two or four weeks your client takes, so the cash cost is the fee, not the APR. The APR is still the right lens for one decision: whether to use financing repeatedly as a standing part of how you operate. A fee you pay once to cover a payroll run is a different thing from the same fee charged every month on every invoice, and at these rates the second one quietly becomes one of your largest line items.
Who qualifies
Invoice financing suits any small business with a B2B model and outstanding receivables, and it is not really an option for B2C businesses (Fundera, checked 7 September 2026). The reason is structural rather than a policy preference: the product needs a named commercial customer whose credit can be assessed and whose payment can be verified, which consumer sales and subscription billing do not provide in the same form.
Speed is the genuine advantage. Fundera describes funding as fast as 1 day once an offer is approved, and NerdWallet says lenders sometimes provide funding in as little as 24 hours (Fundera and NerdWallet, both checked 7 September 2026). Compared with the underwriting on a conventional loan, that is the thing you are really buying.
When it makes sense, and when it does not
It fits a narrow case: real invoices out to creditworthy business clients, a gap caused by their payment terms rather than by a shrinking customer base, and a fee you can absorb as the price of getting paid sooner. It fits badly when invoices are frequently disputed, when your clients are themselves slow and weakly capitalised, or when the underlying problem is that invoices go out late and irregularly. Financing an invoice that should have been sent three weeks earlier is an expensive way to buy back your own admin time.
Rule out the free levers first, because they close more of the same gap than people expect. Payment terms can pull cash forward on their own, which is the whole point of an early payment discount like 2/10 net 30. A structured follow up sequence recovers a large share of what is simply sitting unread, and we have templates for that in our guide to the payment reminder email. If the pile has grown past the point where reminders alone will clear it, start with the process in how to handle outstanding invoices instead.
Fewer invoices need financing when none of them get forgotten
Billbooks tracks every outstanding invoice and follows up automatically, so the gap you are thinking of financing gets smaller before you pay anyone a fee for it. Free for 30 days, no credit card needed.
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Frequently asked questions
What is invoice financing?
It is a way to borrow against unpaid invoices. A lender advances a percentage of an invoice's value up front, you keep collecting from your customer as normal, and you repay the advance plus a fee once they pay. Most lenders advance up to 85% to 90% of the invoice value.
Is invoice financing the same as invoice factoring?
No. With invoice financing you retain ownership of the invoice and collect payment from your customer yourself. With invoice factoring the factoring company advances part of the value and then collects directly from your customer, which usually means your client is dealing with a third party rather than with you.
How much does invoice financing cost?
Advance rates typically run 85% to 90% of the invoice. Fees are quoted as a percentage of the invoice for each period it stays unpaid, and the published ranges vary: Fundera describes 1% to 5% per week, while NerdWallet lists 0.5% to 2% per week or 1% to 5% per month. Confirm whether a quoted rate is weekly or monthly, because the same number means four times the cost.
Will my customers know I am using invoice financing?
Usually not. Because you stay responsible for collecting, nothing about your client's experience changes and there is no reason for them to be told. That is the main practical difference from factoring, where the customer is typically notified and pays the factoring company instead.
How fast can I get funded through invoice financing?
Fast is the point of the product. Fundera describes funding as fast as 1 day once an offer is approved, and NerdWallet says lenders sometimes fund in as little as 24 hours. Approval still depends on how quickly the lender can verify your invoices and your customer.
Does invoice financing work for a B2C or subscription business?
Generally no. Fundera notes it suits businesses with a B2B model and outstanding receivables and is not really an option for B2C businesses, because the product depends on a named commercial customer whose credit can be checked and whose payment can be verified.