How do I apply a vendor credit memo in AP?

Enter the vendor credit as its own record, then apply it against a specific open bill at the point of payment rather than netting it manually. Both QuickBooks and NetSuite require an open bill from that vendor to apply the credit to — a credit with nothing outstanding to apply against just sits unapplied until a new bill arrives.

By Zuny Fester, Head of Operations and Marketing

Reviewed by Zuny Fester

Published September 14, 2026Last reviewed September 14, 2026Editorial policy

Part of the accounts payable and invoice processing guide.

First step	Enter the vendor credit as its own record, separate from any bill
Where it applies	Against an open bill, at the payment step
Requirement in both QuickBooks and NetSuite	An open bill from that vendor must exist to apply the credit to
Effect on the bill	The credit amount is deducted from the bill's total before payment
NetSuite auto-apply option	Can apply the credit to a vendor's oldest open bills automatically

Entering the credit

A vendor credit — from a return, an overcharge, or a promised discount — gets entered as its own record first, not as a negative bill. QuickBooks' own support guidance walks through creating a Vendor Credit with the credit amount and vendor details, kept separate from any specific bill at the point of entry.

Applying it against a bill

Both platforms apply the credit at payment time, not entry time. QuickBooks' guidance describes opening the bill, clicking Make payment, and marking the vendor credit in the Credits section before saving — the credit reduces what's actually paid. NetSuite's own documentation describes the same mechanic with more flexibility: apply the credit on the credit transaction itself via an Apply subtab, during a bill payment run, or through a single-vendor payment — and optionally check an Auto-Apply box to have NetSuite apply the credit to that vendor's oldest open bills automatically.

The one hard requirement

NetSuite's documentation states it plainly: "You must have open bills from the vendor to apply a credit from that vendor." A credit issued for a vendor with no currently open bill has nothing to apply against — it sits unapplied, waiting for the next bill from that vendor, rather than reducing a cash payment today. That's a real timing gap worth knowing about, not a bug: the credit is real and recorded, it just can't reduce a payment that doesn't yet exist.

Next step

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Worked example

A $500 vendor credit with no bill to land on

A vendor issues a $500 credit memo for a damaged shipment, but the business has no other open bills from that vendor at the moment. The credit is entered correctly and appears in the system as an available vendor credit — but per NetSuite's own documented requirement, it can't be applied to anything yet because there's no open bill to apply it against. Three weeks later, a new $1,200 bill arrives from the same vendor. At payment time, the $500 credit is applied against it, and the actual cash payment is $700. The credit was real the whole time; it just took a new bill to actually realize the cash benefit.

Frequently Asked Questions

Some vendors will issue an actual cash or check refund instead of a credit — that's handled as a separate deposit/refund transaction, not a vendor credit applied against a bill. Whether that's available depends on the vendor's own policy, not on AP software capability.

An unapplied vendor credit reduces what the business owes that vendor — functionally it's a reduction to accounts payable (or, in some chart-of-accounts setups, a small receivable from the vendor) until it's applied, rather than a debt itself.

Both platforms support applying a partial credit to one bill and carrying the remainder forward — the credit doesn't have to be fully consumed by one bill; auto-apply logic in particular is built to spread a credit across multiple open bills starting with the oldest.

Sources

Topic

AP & Invoice Processing

Accounts payable and invoice processing is the set of steps a vendor bill goes through between arriving at a company and turning into a payment: capturing what the vendor sent, checking it against wha…

Diagnostic

Why did we pay the same vendor invoice twice?

Almost always one of two things: the vendor exists as two separate records in your vendor master, so a duplicate-invoice-number check that only compares within one vendor ID never sees the second copy — or the invoice was entered twice by different people, because it arrived through two channels and each assumed they had the only copy.

Diagnostic

Why does one vendor show two different balances in AP aging?

The vendor almost certainly exists as two separate records in your vendor master file — created under slightly different names (a typo, a rebrand, a merger, a re-onboarding) — so bills and credits are split across both. AP aging reports by vendor record, not by real-world vendor, so it shows two partial balances instead of one true balance.

Definition

What is accounts payable?

Accounts payable is the aggregate amount a company owes suppliers for goods or services purchased on credit — a short-term liability on the balance sheet. The same term also names the department or function that processes vendor invoices and issues payment, so "AP" can mean either the liability itself or the team that manages it, depending on context.