An exporter sells a commodity priced in US dollars and pays its costs in its home currency. The home currency has strengthened 20% against the dollar.
Dilution in Invoice Finance: a Worked Example
The invoices that were not going to be paid in full.
BY MICHAEL SHANG · SIXTEEN YEARS IN COMMERCIAL BANKING · UPDATED · 6 MIN READ
// THE SHORT ANSWER
Dilution asks a question an ageing report cannot answer: of every dollar a business invoices, how much was not going to arrive? Credit notes, rebates, returns, short deliveries and disputes all cut an invoice without any customer failing, so a young, clean-looking ledger can still be worth less than its face. A financier measures the rate from the credit-note history, usually as non-cash credits divided by sales for the same period, and uses it in setting the advance rate and reserves. Because it follows how the business trades, it tends to repeat, and it tends to rise when the business runs into trouble.
BASIS Practitioner judgment from sixteen years in commercial banking, set out in How Bankers Think (Highbank Press, 2026). Every borrower on this site is a composite constructed for teaching, not a client. The market is mid-market commercial lending as practised in New Zealand and Australia; where a convention differs elsewhere, the page says so.
// MAKE THE CALL
Issue 02 — Aoraki Trade Exports. Paid in USD, costs in NZD, asking for a NZ$6m multi-currency facility. The MD won't say which currencies. Your call first, then the senior banker's.
PART OF Trade Loan
// 01 — WHY A CLEAN LEDGER CAN STILL COME UP SHORT
A receivables financier lends against what customers owe. An invoice for US$100,000 is worth that only if the customer owes US$100,000, and many of the things that reduce the amount owing have nothing to do with the customer's ability to pay. Goods come back. A delivery arrives short. A retailer deducts an allowance when it settles. The price on the invoice was wrong. Each produces a credit rather than a payment, so the collateral shrinks with no cash reaching the account.
Supervisors use the word the same way. The Basel capital standards for purchased receivables define dilution as the possibility that the receivable is reduced through cash or non-cash credits to the obligor, and give returned goods, quality disputes, debts the seller owes the customer, and payment or promotional discounts as examples. Definitions differ at the edge: the US national-bank supervisor's handbook counts bad debts among the sources. Many financiers, and this page, treat bad debts as a separate credit risk.
// 02 — HOW THE RATE IS MEASURED
The formula is short and the choices inside it are not. Credit notes that only correct and reissue an invoice are usually taken out, because the customer still owes the money. Bad-debt write-offs are left out so they are not counted twice, and so are deductions already handled elsewhere in the calculation. The period matters as well. A twelve-month figure smooths the year and a three-month figure catches a change sooner, so a lender usually reads both.
Timing adds a further difficulty. A credit note issued in April often relates to a March invoice, or to something sold last year. Where notes lag the sale, the ledger contains invoices already destined for credit, and a rate measured on sales understates the share of today's ledger affected. A field exam therefore tests a sample of credit notes against the invoices they reduce.
// 03 — THE EXAMPLE
A supplier of private-label snack foods to supermarkets, constructed for this page like every figure in it, invoices US$48.0m a year, has a ledger of US$6.0m at its June year-end and is financed at 85%. Twelve months of credit notes, in US$m:
At 5.6%, the 15% the financier does not advance looks ample. But more than half of that figure is one item. The volume rebate accrues through the year and is settled in a single credit in July, so the June ledger carries a deduction the average conceals:
The financier deducts the accrued rebate from the eligible ledger as a specific item and removes it from the rate, so it is not counted twice. What remains is US$1.2m on sales of US$48.0m, or 2.5%, and that is the figure the advance rate has to allow for. Two suppliers can share a headline of 5.6% and need different terms, depending on whether the credits arrive evenly or in a lump. Every percentage here is the example's and not a market norm.
// 04 — DILUTION AND BAD DEBT ARE DIFFERENT LOSSES
A bad debt is money truly owed by a customer that cannot pay. Dilution is a debt that was not fully owed, or stopped being owed. The protections do not overlap. A credit check on the customer says nothing about whether the goods were right. Trade credit insurance generally responds to insolvency or protracted default and leaves a disputed debt outside cover until the dispute is resolved. Recourse lets a financier come back to its client for an unpaid invoice, which helps little once the client has failed.
Dilution also tends to move against the lender at the worst moment. A supplier in trouble ships late, quality slips and customers begin to claim. Once it stops trading, customers with warranty claims or unfilled orders have every reason to deduct them. A rising rate can therefore be a warning about the business itself, a point the US supervisor's handbook makes directly. Contra, where a customer is also a supplier, is a related exposure that can be seen in advance.
DEFINED IN ONE PARAGRAPH → · THE ADVANCE RATE IT FEEDS → · INVOICE FINANCE →
// 05 — WHERE IT DECIDES A FILE
Before a facility is signed, the financier asks for the credit-note history and reads it beside the aged debtors report. The answer goes into the advance rate and, where dilution runs above a level agreed in the document, into a reserve that takes the excess off availability. It also touches eligible receivables: rebate accruals, disputed amounts and unapplied credits may be deducted from the pool directly, and the lender has to see that the same dollar is not deducted twice.
After signing, the rate is a number to watch. A jump in credit notes that coincides with a new customer or product line says something about what the business is now selling. For the borrower, the practical point is that a large rebate agreed with a retailer reduces funding as well as margin, and it does so on the date it is credited rather than the day it was promised.
// SOURCES
The documents the statements on this page rest on. Each was opened and checked when cited.
- Basel Committee on Banking Supervision, Basel Framework, CRE34.8 and footnote — risk-weighted assets for dilution risk — Defines dilution as the possibility that the receivable is reduced through cash or non-cash credits to the obligor, with returns, quality disputes, debts to the obligor and payment or promotional discounts as examples; it is a bank capital rule for purchased receivables, cited for the definition — section 01.
- Office of the Comptroller of the Currency, Comptroller's Handbook: Asset-Based Lending, Version 1.1 (January 2017), page 17 — The US supervisor counts returns, allowances, disputes, bad debts and other offsets as dilution, and says a rise in the rate can signal a decline in product or service quality — sections 01 and 04.
// QUESTIONS PEOPLE ASK
- How do you calculate dilution on accounts receivable?
- Divide the non-cash credits issued in a period, such as credit notes, rebates, returns and allowances, by the invoiced sales for that period. Credits of US$400,000 on sales of US$10m give a rate of 4%. Lenders usually remove credits that are immediately reissued and bad-debt write-offs, and look at twelve-month and shorter periods side by side. Agreements differ on what counts, so the definition has to be read before two rates are compared.
- What is a dilution reserve?
- An amount a lender deducts from availability under a borrowing base because dilution is higher than the advance rate was set to absorb. It works like a reduction in the advance rate without changing the rate itself, and many agreements apply it only to the part of dilution above an agreed level. Because it is calculated from recent history, it can rise and fall with the borrower's credit notes from one period to the next.
- What is a normal dilution rate?
- It varies too much by industry for a single figure to be useful. A business with routine rebates, returns or promotional deductions, such as a supplier to large retailers, can run far higher than one selling made-to-order goods on firm prices. A lender reads the composition and the trend rather than a level alone: what is causing the credits, whether they repeat, and whether they are growing.
- Is dilution of receivables the same as share dilution?
- No. Share dilution is the reduction in an existing shareholder's percentage when a company issues more shares. Receivables dilution is what credits and adjustments take off the invoices a company has raised. The two share a word and nothing else. In a lending file, dilution means the second unless the context is an equity raise or a convertible instrument.
// NEXT TO IT
- RECEIVABLES AND TRADEEligible receivablesFace value is what was invoiced. Eligible is what gets funded.
- RECEIVABLES AND TRADEAdvance rateThe unfinanced share forecasts what will not turn into cash.
- RECEIVABLES AND TRADEBorrowing baseA limit that notices when the assets have gone.
- RECEIVABLES AND TRADERecourse (receivables finance)The money was advanced. The risk came back.
// ON WHOSE DESK
The seats that read this term in an ordinary week. Each page says what the seat is for, who arrives in it, and the shape of the round it runs.
- Transaction bankerSells and structures the plumbing a business runs on — accounts, payments, collections, liquidity and trade finance.
- Credit analystReads a borrower and writes the recommendation a decision-maker will act on.
- Business relationship managerCarries a book of trading businesses — wins them, keeps them, and is the bank's voice when the answer is no.
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