A credit memo works by reducing what a buyer owes a seller after the original invoice has already gone out. The seller issues the document, links it to the original invoice, and lowers the buyer’s account balance by the specified amount. Nothing about the first invoice gets voided or rewritten. The credit memo simply adjusts the piece that changed, whether that’s a return, a billing mistake, or a price concession negotiated after the sale. Both parties then record matching entries so their books agree, and the credit either offsets a future payment or, less commonly, gets refunded in cash.
When a Seller Issues One
A handful of situations account for most credit memos. Product returns are the most common: the buyer sends goods back, and the seller credits the value of those items. Damaged or defective shipments trigger them often, sometimes for the full invoice, sometimes only for the affected line items. Billing errors are another routine cause — a wrong unit price, or an invoice for more units than actually shipped.
Sellers also issue credit memos for price reductions agreed to after the fact. A buyer might point out that a competitor quoted less, or a seller might grant a post-sale allowance to head off a full return. Either way, the memo formalizes the reduction so both ledgers move together. The credit itself is a reduction against the buyer’s account balance, not a cash payment. Turning it into a refund check is a separate step that happens only if the buyer asks or has no upcoming purchases.
Credit Memo vs. Debit Memo
The two documents move in opposite directions. A credit memo, issued by the seller, decreases what the buyer owes. A debit memo, also issued by the seller, increases it, usually because the original invoice undercharged or because additional costs like freight or restocking fees apply. From the seller’s side, a credit memo shrinks accounts receivable; a debit memo grows it.
Buyers sometimes issue their own version, often called a debit note, to formally request a credit from the seller. This happens when the buyer spots a pricing discrepancy or a shortage and wants to document the claim. The seller reviews the debit note and, if valid, responds with a matching credit memo.
What Goes on the Document and Who Approves It
The process usually begins in customer service or sales. A buyer reports a problem, returns merchandise, or negotiates an adjustment, and someone on the seller’s side opens a credit request. Approval comes next, typically scaled to the dollar amount. A $200 credit for a shipping error might need only a department manager. A $50,000 credit for a large return might require a VP or controller.
Once approved, the memo needs specific details to be useful. It should reference the original invoice number so both parties can trace the adjustment back. The line items being credited, with quantities and unit prices, must be spelled out. A short reason (“defective units returned” or “pricing correction per agreement dated X”) helps during audits. The issuance date determines which accounting period absorbs the revenue adjustment, so it matters more than it might seem.
The finished memo goes to the buyer, who uses it to update accounts payable. Without the document, the buyer has no formal basis for shorting the next payment, and the seller’s records would show a receivable nobody plans to collect.
The Seller’s Journal Entries
When goods are involved, the accounting has two sides: the revenue side and the inventory side. Skipping the second one is a common mistake.
Revenue Side
The standard entry debits a contra-revenue account, usually called Sales Returns and Allowances, and credits Accounts Receivable. Running the reduction through a contra account rather than directly against Sales keeps returns and allowances visible on the income statement, where they net against Gross Sales to produce Net Sales. A $500 credit memo produces a $500 debit to Sales Returns and Allowances and a $500 credit to Accounts Receivable.
Some smaller businesses skip the contra account and debit Sales Income directly. The bottom line comes out the same, but the ability to track return rates separately disappears. Sage 50, for instance, defaults to debiting Sales Income and crediting Accounts Receivable when processing a credit memo.1Sage 50 Help. Journal Entry Distributions—Credit Memos Either method is acceptable; the contra-account approach just gives management better data on the magnitude of returns.
Inventory Side
When returned goods are going back into stock, the seller also has to reverse the cost of goods sold. The entry debits Inventory (putting the goods back on the books) and credits Cost of Sales (reversing the expense that hit when the goods first shipped). Skipping this leaves cost of goods sold overstated and inventory understated. For stock or assembly items, accounting software typically posts both the revenue-side and inventory-side entries at once.1Sage 50 Help. Journal Entry Distributions—Credit Memos
If the credit is for a price adjustment or billing correction rather than a physical return, the inventory side doesn’t apply. No goods came back, so there’s nothing to add to inventory and no cost of sales to reverse. Only the revenue entry runs.
Sales Tax
If the original invoice included sales tax, the credit memo should adjust the seller’s sales tax liability too. The entry debits Sales Tax Payable for the tax on the credited items, reducing what the seller owes the state.1Sage 50 Help. Journal Entry Distributions—Credit Memos The credit lowers total taxable sales for the period in which it was issued, so the issuance date drives which return picks up the change.
How the Buyer Records It
On the buyer’s side, the entry mirrors the seller’s. The buyer debits Accounts Payable (reducing what they owe) and credits a Purchase Returns account (reducing net purchase costs). If the original purchase went straight into Inventory rather than a Purchases account, the credit hits Inventory instead.
The effect is simple: the buyer’s ledger now shows a smaller balance owed to that vendor. On the next payment, the buyer can short-pay by the credit amount and both accounts reconcile. Most accounting software matches these automatically once the memo is entered against the correct vendor and invoice.
What Happens to the Credit Next
A credit sitting on a customer account has two possible destinations. The more common one is offsetting it against an existing or future invoice. If a buyer owes $1,000 on an open invoice and receives a $300 credit memo, the next payment drops to $700. The seller’s system applies the credit to that specific invoice, and both sides close the transaction at zero.
Credits can also be split. A $300 credit might cover $150 on one invoice and $150 on another, or partially offset one large invoice and leave a remaining balance for later. Customer account ledgers keep a running total of open invoices against available credits, and most accounting systems prompt the user to apply outstanding credits when a new payment comes in.
The other path is a cash refund. This tends to happen when the customer relationship is ending or the buyer has no upcoming purchases. The seller pays the buyer back, debiting Accounts Receivable (or the credit balance on the customer’s account) and crediting Cash. Until the refund is actually paid out, the credit stays as a liability on the seller’s books.
The ASC 606 Wrinkle for GAAP Filers
For companies following U.S. GAAP, ASC 606 changes the timing. The standard treats expected returns as variable consideration, so sellers can’t just wait for returns and record credit memos as they happen. They have to estimate returns upfront.
ASC 606 requires sellers to recognize revenue only for the amount they expect to keep. When a product is sold with a return right, the seller estimates expected returns and reduces revenue at the time of sale, not when the credit memo eventually gets issued. A refund liability is recorded for the estimated return amount, along with a corresponding asset for the right to recover the returned products.2Deloitte. ASC 606-10 Variable Consideration
Each reporting period, the seller updates the estimate. If actual returns run higher than expected, revenue gets reduced further. If they run lower, previously constrained revenue gets recognized. When the individual credit memo finally goes out, it hits the refund liability rather than revenue directly. For companies with meaningful return rates, the credit memo becomes the last step in a process that started with an estimate at the point of sale.
Credits That Sit Too Long
A credit memo that never gets used creates a legal obligation. Every state has unclaimed property laws requiring businesses to turn dormant balances over to the state after a set dormancy period. For credit balances on customer accounts, three years is the most common period, though roughly a dozen states set it at five.
Before dormancy expires, sellers are typically required to make a good-faith effort to reach the customer and let them know about the outstanding credit. If the customer doesn’t respond or can’t be located, the balance gets reported to the state’s unclaimed property division and the funds are remitted. The credit comes off the seller’s books at that point. Ignoring escheatment can bring penalties and interest, and state auditors increasingly target accounts receivable credit balances. Reviewing credit balances periodically is a lot cheaper than surfacing the problem during an audit.