Supplier Early-Payment Discounts: Is Paying Faster Worth the Cash?
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Article Summary
A supplier early-payment discount is worth taking only if it beats the cost of funding and the payment still leaves enough cash for payroll. On a hypothetical $50,000 invoice at 2/10, net 30, paying $49,000 twenty days early saves $1,000, a simple annualized return of about 37.2%. Borrowing the $49,000 at 12% for twenty days costs about $322, leaving roughly $678. Bennett's rule is not to protect a discount by exposing payroll, so test the lowest cash balance before the normal due date.
Your supplier offers 2% off if you pay twenty days early. That sounds small until you calculate the return on the cash you surrender. It sounds less attractive when the early payment lands two days before payroll.
For an established service business, the decision needs two approvals: the discount must beat the cost of funding, and the payment must leave enough cash for the next operating commitments. Passing the first test doesn't excuse failing the second.
Bennett's financial position is straightforward: don't protect a discount by exposing payroll. Calculate both before authorizing the payment.
Price the twenty days you are buying
In a hypothetical example, a supplier invoices $50,000 on terms of 2/10, net 30: pay $49,000 by day ten or $50,000 by day thirty. Confirm the actual contract's timing and eligibility rules.
You save $1,000 by committing $49,000 twenty days earlier. The period return is $1,000 divided by $49,000, or 2.04%. A simple annualized comparison using 365 days is:
Discount return = discount ÷ (1 − discount) × 365 ÷ days accelerated.
Here, 2% ÷ 98% × 365 ÷ 20 equals approximately 37.2%. This is a comparison rate, not an investment yield you can necessarily earn repeatedly for a year. The actual benefit on this invoice remains $1,000.
The Treasury's discount guidance also separates an offered discount from an economically justified discount. Its rules govern federal agencies; your private business follows its own agreement. The useful principle is to evaluate the economics before paying.
Compare the actual funding cost
Suppose an available credit facility costs a hypothetical 12% annual interest, with no incremental draw fee. Borrowing $49,000 for twenty days costs about $322 using a 365-day basis. The discount leaves approximately $678 before any additional fees.
That looks attractive, provided the facility permits the use, has reliable availability, and can be repaid when expected. Include draw fees, minimum interest, unused-capacity consequences, and the risk that the borrowing lasts longer than twenty days.
Paying from cash has a cost too. Interest forgone may be modest, but losing the ability to cover an unexpected receivable delay may be expensive. A mathematical spread is only part of the decision.
Don't use the supplier's entire $50,000 invoice as the financing amount when the discounted payment is $49,000. Don't use thirty days as the acceleration period when the choice is day ten versus day thirty.
A discount can improve margin while tightening cash. A free 20-minute Profit & Tax Leak Check uses rough numbers, with no documents required, to identify which pressure deserves a closer look. It is a directional conversation, not an invoice or financing review.
Put both payment dates into the forecast
Now suppose the business expects $92,000 in unrestricted cash before the early-payment date. Payroll and other unavoidable payments before day thirty total $65,000. A client is expected to pay $40,000, but the receipt could slip.
Paying early leaves $43,000 before those commitments. Without the client receipt, the balance falls to negative $22,000. Waiting until day thirty preserves the $49,000 through the immediate payroll window, although the full invoice still needs funding when due.
The discount hasn't become economically bad. The business has discovered that it needs financing or more reliable collections before it can take it safely.
Run both versions in the 13-week cash forecast. The relevant comparison is the lowest balance before the normal due date and the funding needed at that date. A month-end balance can hide a midmonth shortfall.
Rank invoices when cash is limited
Not every early-payment offer deserves the same priority. List eligible invoices with their discount dollars, cash required, days accelerated, approval status, and funding cost.
A smaller invoice can produce a better return per dollar committed. Conversely, an impressive annualized percentage on a tiny invoice may not justify unusual administration. Evaluate net dollars alongside the percentage.
Exclude disputed invoices until the underlying issue is resolved. Paying early to capture a discount can reduce negotiating flexibility on incomplete or defective work. Have purchasing confirm receipt and acceptance before finance releases money.
Also distinguish a discount on an existing payable from prepaying for future supply. The latter adds delivery and supplier-credit exposure. It needs a separate decision, even when the salesperson uses the same word.
Make the rule repeatable
An approval policy can require three recorded facts: a positive benefit after financing cost, no forecast breach of the cash floor, and an accepted invoice with verified payment instructions.
Use the cash-reserve framework to set that floor from your actual operating risks. Don't replace it with an arbitrary rule to take every discount above a certain percentage.
Fractional CFO support can connect purchasing terms, lender availability, and the weekly cash forecast so the controller doesn't have to choose between savings and liquidity without a policy.
Before the next payment run, calculate the return on the five largest eligible invoices and mark the cash low point under each payment date. If the tradeoff is still unclear, bring those rough totals to a Profit & Tax Leak Check and identify the next calculation that matters.
Frequently asked questions
What does 2/10, net 30 mean on a supplier invoice?
The buyer can take a 2% discount by paying within ten days, or pay the full amount by day thirty. In the hypothetical example, that is $49,000 on a $50,000 invoice by day ten or $50,000 by day thirty. Actual eligibility and timing come from the supplier agreement.
Why is the early-payment discount return about 37.2% annualized?
The $1,000 saving divided by the $49,000 paid early is a 2.04% period return. Using discount ÷ (1 − discount) × 365 ÷ days accelerated, 2% ÷ 98% × 365 ÷ 20 is approximately 37.2%. It is a comparison rate, not a promised annual investment yield.
Should I borrow on a credit line to take a supplier discount?
Only after comparing all incremental borrowing costs with the discount. At a hypothetical 12% rate, borrowing $49,000 for twenty days costs about $322, leaving roughly $678. Confirm permitted use, availability, draw fees, minimum interest, and repayment timing, because a positive spread alone does not establish affordability.
What if payroll falls before the supplier invoice's normal due date?
Model both payment dates and the lowest cash balance. In the example, paying early leaves $43,000 before $65,000 of payroll and unavoidable payments, and if a $40,000 client receipt slips, the balance falls to negative $22,000. An early payment that breaches the cash floor needs reliable funding first.
Is the funding amount for an early-payment discount the full invoice value?
No. In the example the funding amount is $49,000, the discounted amount paid early, rather than the $50,000 face value. Likewise, the acceleration period is twenty days, the difference between day ten and day thirty, not the full thirty-day term.
Which supplier discounts should get priority when cash is limited?
List eligible invoices with discount dollars, cash required, days accelerated, approval status, and funding cost. A smaller invoice can produce a better return per dollar committed, while a high annualized percentage on a tiny invoice may not justify the administration. Evaluate net dollars alongside the percentage while preserving the cash floor.
Should disputed supplier invoices qualify for early payment?
No. Exclude disputed invoices until the underlying issue is resolved, because paying early to capture a discount can reduce negotiating flexibility on incomplete or defective work. Have purchasing confirm receipt and acceptance, and verify payment instructions, before finance releases the money.
Is prepaying a supplier the same as taking an early-payment discount?
No. A discount on an existing accepted payable only accelerates a known obligation. Prepaying for future supply adds delivery and supplier-credit exposure, so it needs a separate decision and approval even when the supplier's salesperson uses the same word, discount.