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.

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.

As a balance-sheet item	A current (short-term) liability — amounts owed to suppliers, not yet paid
As a function	The team or process that receives invoices, approves them, and issues payment
What creates an AP liability	Receiving goods or services on credit terms, before payment is made
What clears it	Payment issued to the vendor for the invoiced amount
Its counterpart on the other side of a transaction	Accounts receivable — the same invoice, recorded as an asset by the vendor issuing it

The liability, and the function that manages it

Accounts payable is the aggregate amount of a company's short-term obligations to pay suppliers for products and services purchased on credit. That's the balance-sheet definition. In everyday use, the same term also refers to the department or process that manages those obligations — receiving vendor invoices, verifying them, routing them for approval, and issuing payment. Someone saying "send that to AP" means the department; someone reading "AP" on a balance sheet means the liability.

How an AP liability comes into existence and clears

The liability is created the moment a company receives goods or services on credit — before cash actually changes hands. It sits on the balance sheet as a current liability until payment is made, at which point it clears: the AP balance decreases, and cash decreases by the same amount. The lag between receiving something and paying for it is exactly what accounts payable exists to track.

AP and AR are mirror images of the same transaction

Every invoice a business receives and records in its own AP is the same invoice its supplier recorded in their AR. One company's payable liability is the counterparty's receivable asset — the transaction is identical, just recorded from opposite sides of the relationship.

Next step

Map the finance workflow with the most exposure and prove the automation path.

Bring the invoice, contract, payment reconciliation, or customer finance workflow you have to defend at audit. Loopfour can map the trigger, controls, integrations, and approval loop.

Book a workflow review

Worked example

One invoice, two ledgers

A marketing agency delivers a $5,000 campaign to a client on 30-day payment terms. The moment the work is delivered and invoiced, the agency records a $5,000 accounts receivable — an asset, money it's owed. The client, receiving the same invoice, records a $5,000 accounts payable — a liability, money it owes. Thirty days later, when the client pays, its AP balance drops by $5,000 and its cash drops by $5,000; the agency's AR balance drops by $5,000 and its cash rises by $5,000. Same transaction, opposite entries, on two different companies' books.

Frequently Asked Questions

A liability — it represents money a company owes, not money it's owed. Accounts receivable, the mirror concept, is the asset.

Typically not — AP specifically refers to trade payables owed to vendors and suppliers for goods and services. Payroll liabilities and tax liabilities are usually tracked as their own separate balance-sheet line items.

Accounts payable arises from routine trade credit with suppliers, generally short-term and without formal interest terms. A note payable is a formal, often interest-bearing debt obligation (a loan), which may be short- or long-term and is tracked separately from trade AP.

Sources

Definition

What is accounts receivable?

Accounts receivable is the money customers owe a business for goods or services already delivered on credit, recorded as a current asset on the balance sheet until collected. It's a debit balance (increases with a debit, decreases with a credit) and typically converts to cash within a year, which is why it's classified as a current rather than long-term asset.

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

What causes a three-way match failure between the PO, receipt, and invoice?

A three-way match compares the PO, the receipt (what was actually delivered), and the invoice on quantity, price, and charges. A failure means one of those three disagrees beyond tolerance — usually because the invoice bills a quantity that isn't fully receipted yet, the unit price differs from the PO, or the invoice adds a charge, like freight, the PO never included.

Comparison

Do I need a 2-way or 3-way match for this purchase?

A 2-way match (PO against invoice) is enough for low-risk, non-physical purchases like software subscriptions or professional services, where there's no separate delivery step to verify. A 3-way match (PO, receipt, and invoice) is the standard for physical goods, where confirming something actually arrived — and in what quantity — is the whole point of the extra step.