Credit Memo vs Debit Memo Guide

The difference between a credit memo and a debit memo is direction: a credit memo decreases the amount a buyer owes, and a debit memo increases it. A seller issues a credit memo after a return, an overcharge, or a post-sale discount, which lowers the buyer's accounts payable. A debit memo adjusts the same transaction the other way, raising the balance after an undercharge or an added fee. Both reference the original invoice rather than replacing it. Last updated July 2026.

Get the two backward and your payable balance is wrong, and an unapplied credit means you overpay a vendor. This guide explains what each document is, how they differ, how a credit memo differs from an invoice and a credit note, when they get issued, and how to process one in accounts payable. It is written for US business owners, bookkeepers, and AP staff who reconcile these against vendor invoices every month. If you only need one side, our full guides to the credit memo and the debit memo each cover the definition, examples, and the fields the document has to carry.

What is a credit memo?

A credit memo is a document a seller issues to a buyer that reduces the amount the buyer owes on a previously issued invoice. It does not request payment; it lowers a balance. For the buyer's accounts payable, a credit memo is money back: it decreases what you owe that vendor, either against an open invoice or as a credit toward a future purchase.

Sellers issue credit memos to correct an overcharge, account for returned or damaged goods, apply a post-sale discount, or fix a pricing error on the original invoice. Rather than voiding and reissuing the whole invoice, the seller sends a credit memo for the difference. It usually references the original invoice number, the line items affected, and the credit amount, so both sides can tie it back to the sale it adjusts. A credit memo is sometimes called a credit note.

What is a debit memo?

A debit memo is a document that increases the amount owed on a transaction. From the buyer's accounts payable perspective, a debit memo raises what you owe a vendor, typically because the original invoice undercharged you, a quantity was understated, or an agreed fee was left off. It is the mirror image of a credit memo.

Debit memos move money toward the seller, where credit memos move it toward the buyer. A seller might issue a debit memo to bill for an additional cost that surfaced after the original invoice, such as freight or a price correction. On the buyer's side, some AP teams also issue their own debit memos to a vendor to formally claim a deduction (for a short shipment, for example) before the vendor agrees to a matching credit memo. Either way, the effect on your payable balance is an increase.

What are debit memos?

Debit memos are documents that increase the amount owed on a transaction that was already invoiced. A vendor issues one when they realize you were undercharged, a quantity was understated, or an agreed fee was left off the original invoice, so instead of reissuing the invoice they bill the difference with a debit memo.

Typical triggers are an underbilling correction, a price or rate adjustment agreed after the fact, added freight or handling, rush fees, or a scope change on a service. For example, a SaaS vendor might invoice an annual plan and later add features mid-term; rather than opening a new invoice, they send a debit memo to raise the amount owed. On your side the document has to be verified against the contract and the original invoice before you accept the increase, because a debit memo you do not agree with is a dispute, not a payable.

What is a debit memo in accounts payable?

In accounts payable, a debit memo is an adjustment that raises what you owe a vendor after the original invoice. When you receive one, you record it as an increase in your payable to that vendor and, once verified, pay the higher net amount. It is the opposite of a credit memo, which lowers the payable.

AP teams handle debit memos in two directions. Inbound, a vendor sends a debit memo to charge you more, and you match it to the original invoice, verify the added amount is contractually correct, code it to the same GL account and cost center the original charge hit, and add it to the next payment. Outbound, some AP departments issue their own debit memo to a vendor to formally claim a deduction, such as for a short or damaged shipment, before the vendor confirms a matching credit. Whichever way it flows, the control is the same: verify the adjustment against the source documents before it changes what you pay.

Why a debit memo is not an invoice

An invoice opens the original obligation and bills for goods or services delivered. A debit memo comes later and adjusts that existing obligation upward, usually to correct an undercharge or add a fee the original invoice missed. An invoice starts the balance, a debit memo changes it.

They look alike because both carry a document number, a date, vendor and buyer details, and line items, which is why a debit memo can slip through AP as if it were a fresh invoice. The tell is that a debit memo references an earlier invoice it is adjusting, while an invoice stands on its own. Capturing the document type at data entry keeps a debit memo linked to the invoice it corrects instead of being paid twice as a standalone bill. For the full side-by-side, including which party issues each document and how to spot the difference in a stack of vendor paperwork, see our detailed comparison of a debit memo vs invoice.

How do you process a debit memo (and handle a debit memo correction)?

To process a debit memo, verify it against the original invoice and the contract, confirm the added amount is legitimate, enter it in your AP system linked to the correct vendor and source invoice, code it to the matching GL account, and include it in the next payment run. If the memo itself is wrong, you dispute it rather than pay it.

A debit memo correction is what you do when the adjustment does not hold up: the price increase was not agreed, the fee duplicates a charge already billed, or the quantity is wrong. In that case you push back to the vendor with the original invoice and contract terms, and the vendor either withdraws the debit memo or replaces it with a corrected one, sometimes paired with a credit memo that reverses the overstatement. The reason clean capture matters here is that you cannot spot a bad debit memo unless the original invoice data is accurate and easy to compare against. When the vendor, invoice reference, line items, and amounts are already structured, catching an unjustified increase takes a glance instead of a manual dig through email.

What is the difference between a credit memo and a debit memo?

The difference is direction. A credit memo decreases the amount owed and moves money toward the buyer; a debit memo increases the amount owed and moves money toward the seller. Both adjust a transaction after the original invoice has been issued, so the parties do not have to cancel and reissue the invoice from scratch.

Think of them as two corrections that point opposite ways. If the original invoice was too high, or goods came back, the seller sends a credit memo and your accounts payable goes down. If the invoice was too low, or extra costs apply, a debit memo brings the balance up. The trigger (an error, a return, an added charge) decides which document you receive, and the direction tells you instantly whether your payable shrinks or grows.

Credit memo vs debit memo at a glance

Is a credit memo the same as a credit note?

Yes, a credit memo and a credit note are the same document under two names. Both are issued by a seller to reduce the amount a buyer owes, and both serve as written proof that a credit has been applied. The term you see depends mostly on the country and the accounting software, not on any difference in function.

US businesses and accounting platforms tend to say "credit memo," while "credit note" is more common in the UK and parts of Europe. The fields are the same either way: the issuing party, the original invoice reference, the affected line items, and the credit amount. If a vendor sends you a "credit note," treat it exactly as you would a credit memo in your accounts payable process.

What is the difference between a credit memo and an invoice?

An invoice requests payment and increases what the buyer owes; a credit memo reduces an existing balance and never asks for money. The invoice opens the obligation by billing for goods or services, while the credit memo corrects or reverses part of that obligation after the fact. One adds to accounts payable, the other subtracts from it.

They share a lot of structure, which is why they are easy to confuse. Both carry a document number, a date, vendor and buyer details, and line items. The tell is the intent: an invoice states a total due with payment terms, and a credit memo states a credit amount tied to an earlier invoice. If you handle a high volume of both, it helps to capture the document type during data entry so credits are never accidentally paid as bills. For the broader invoice-versus-receipt-versus-bill picture, see our explainer on the difference between an invoice and a receipt.

When is a credit memo issued?

A credit memo is issued whenever a previously billed amount needs to come down. The most common triggers are returned or rejected goods, damage in transit, an overcharge or pricing error on the original invoice, a post-sale discount or rebate, and partial cancellations or service disputes. In each case the seller credits the buyer instead of reissuing the invoice.

For an AP team, credit memos most often show up after a return is authorized or after you have flagged a billing discrepancy during invoice review. If your three-way match catches that you were charged for ten units but only received eight, the vendor resolves it with a credit memo for the two missing units. That is one reason a clean match matters: it surfaces the discrepancies that credit memos exist to correct. See our guide to three-way matching for how that check works.

How does a credit memo affect accounts payable?

A credit memo reduces your accounts payable balance. When you receive one from a vendor, you record it as a decrease in what you owe that vendor, and the credit is applied either against a specific open invoice or held on account for future invoices. Your liability goes down by the credit amount, and the corresponding expense or asset is adjusted to match.

The mechanics are straightforward in any accounting system: the credit memo offsets an invoice from the same vendor so you pay the net. If a vendor invoice is $4,000 and they issue a $600 credit memo for returned goods, you pay $3,400 and your payable to that vendor drops accordingly. The key control is applying the credit to the right invoice and vendor record, because an unapplied or misapplied credit either inflates what you pay or leaves money sitting unused. In QuickBooks this offset is recorded as a vendor credit that you apply against an open bill.

How do you process a credit memo in accounts payable?

To process a credit memo, verify it against the original invoice, enter it as a credit in your AP system, link it to the correct vendor and invoice, then apply it so the next payment is reduced by the credit amount. The goal is to net the credit against what you owe before the payment run, not after you have already paid in full.

A reliable workflow looks like this:

1. Match the credit memo to its source. Confirm the vendor, the original invoice number, the affected line items, and the credit amount agree with what was returned or overcharged.
2. Capture the document accurately. Record the vendor, date, reference invoice, and amount, and tag it clearly as a credit memo so it is never queued as a payable to be paid.
3. Code it correctly. Post the credit to the same general ledger account and cost center the original expense hit, so the reversal lands where the charge did. Our explainer on invoice coding covers how GL coding works.
4. Apply it to the open invoice. Link the credit to the relevant invoice in QuickBooks, Xero, NetSuite, or your ERP so the payment is automatically reduced.
5. Reconcile. Confirm the vendor statement reflects the applied credit and that no duplicate credit or payment slipped through.

The slow part of this is almost always step two: keying the vendor, invoice reference, line items, and amount by hand off a PDF. Pulling those fields automatically is exactly what an invoice data extraction tool does. You can upload a credit memo or an invoice and get the vendor, document number, dates, totals, and full line-item detail as structured data, then push it into your accounting system. Capturing the document type and amounts cleanly is what makes the credit apply to the right invoice instead of becoming a reconciliation headache later, and it is the same first step behind accounts payable automation. For high volumes, automated invoice data capture handles credit memos and invoices in the same batch.

What is an example of a credit memo?

A simple example: a vendor invoices you $5,000 for 100 units, but 15 arrive damaged and you return them. The vendor issues a credit memo referencing the original invoice for $750 (15 units at $50). You apply that $750 credit against the $5,000 invoice and pay $4,250, and your accounts payable to the vendor falls by $750.

Another common case is an overcharge. Say an invoice lists a unit price of $52 when your contract price is $50, across 200 units. The vendor sends a credit memo for $400 to correct the $2 difference. You record the credit, apply it to the invoice, and pay the corrected amount. In both examples the credit memo references the original invoice, names the affected line items, and states the credit amount, which is what lets your AP team tie it back to the right transaction and reduce the payment accurately.

How do you handle credit and debit memo data entry?

Credit and debit memo data entry means keying each memo's vendor, original invoice reference, affected line items, and adjustment amount into your accounting system, then tagging the document type so a credit is never paid as a bill. The safest approach is to capture those fields the moment the memo arrives and apply the adjustment before the next payment run.

Doing this by hand is where AP teams lose time and make errors. A misread amount or a memo entered against the wrong invoice throws off the vendor balance, and an unapplied credit means you overpay. Teams that process memos in volume usually automate the keying step so the data lands clean the first time. Our guide to automating invoice data entry walks through the workflow, and dedicated invoice data entry software reads credit memos, debit memos, and invoices in the same batch and exports them to Excel, CSV, or your ERP. The point is simple: when the numbers come in accurately, applying the memo to the right invoice takes seconds and your books tie out.

The takeaway for accounts payable teams

Credit memos and debit memos exist so vendors and buyers can adjust a transaction without scrapping the original invoice. Remember the direction: a credit memo lowers what you owe, a debit memo raises it, and a credit note is just another word for a credit memo. The risk in AP is not understanding them, it is processing them, because an unapplied credit means you overpay and a misread document means your books do not tie out.

The fix is accurate capture at the point the document arrives. When the vendor, invoice reference, amounts, and line items come in as clean structured data, applying a credit to the right invoice takes seconds instead of a manual hunt through email. If you are tightening up the rest of the cycle too, our guides on invoice coding and three-way matching cover the adjacent controls, our credit memo journal entry guide shows how to book both sides, and once credits are applied and invoices approved, a separate payments and approval platform handles scheduling and paying the approved net amount. Working in QuickBooks specifically? See how to create and apply a credit memo in QuickBooks.