What Is Accounts Payable? Definition, Process, Journal Entries and Controls

Most businesses do not pay for everything at the moment they buy it. Suppliers deliver goods or perform services and send an invoice payable in 30 or 60 days. Until the business pays, it owes that money. The total of those obligations is accounts payable, and the team and process that manage them are also called accounts payable.

This guide explains what accounts payable is, how it is recorded, the end-to-end AP process, the reports and metrics that matter, the controls that prevent costly errors and fraud, and how AP affects cash flow. It is written for business owners, new finance staff and anyone who wants a clear grounding in AP.

Accounts payable definition

Accounts payable is the amount a business owes to its suppliers (vendors) for goods or services received but not yet paid for. Key characteristics:

• It is a liability, because the business has an obligation to pay.
• It is usually a current liability, due within a year, typically within 30 to 90 days.
• It arises from trade credit: supplier invoices with payment terms.
• It appears on the balance sheet as accounts payable or trade payables.

Accounts payable is distinct from other liabilities such as loans, accrued expenses (costs incurred but not yet invoiced), payroll liabilities and taxes payable, although all are current liabilities.

Accounts payable in double-entry accounting

Recording a supplier invoice

When a business receives and approves a supplier invoice for 1,200 of office supplies, under accrual accounting:

Account	Debit	Credit
Office supplies expense	1,200
Accounts payable		1,200

If the invoice includes recoverable sales tax or VAT, for example 1,000 net plus 200 VAT:

Account	Debit	Credit
Office supplies expense	1,000
VAT recoverable (input tax)	200
Accounts payable		1,200

Paying the invoice

When the business pays the supplier:

Account	Debit	Credit
Accounts payable	1,200
Cash at bank		1,200

The expense was recognised when the invoice was recorded; payment only settles the liability and reduces the bank balance.

Purchases of inventory or assets

Purchases of inventory debit inventory rather than an expense; purchases of equipment debit fixed assets. AP is credited in each case.

Early payment discounts and credit notes

If a supplier offers 2% for payment within 10 days and the business takes it on a 1,000 invoice, it pays 980. The 20 discount is typically recorded as a reduction of the cost or as discount received. A credit note from the supplier debits AP and credits the original expense or inventory account.

Cash-basis accounting

Businesses using cash accounting record expenses when paid and do not maintain AP balances in their ledger, though they still need to track unpaid bills to manage cash. Larger businesses generally must use accrual accounting.

Accounts payable vs related terms

Term	Meaning	Difference from AP
Accounts receivable	Money customers owe the business	The opposite side; an asset. See AP vs AR
Accrued expenses	Costs incurred but not yet invoiced	No invoice yet; recorded by estimate
Notes payable	Formal written promises to pay, often with interest	Loans rather than trade credit
Trade payables	Amounts owed to suppliers of goods and services	Often used interchangeably with AP
Expenses	Costs recognised in profit and loss	AP is the balance sheet obligation, not the expense itself

The accounts payable process

The AP process typically follows these stages. Our guide to invoice processing covers each stage in more depth.

1. Supplier onboarding: collecting and verifying supplier details, tax numbers and bank details before the first invoice.
2. Purchasing: purchase orders for defined categories. See purchase order vs invoice.
3. Invoice receipt: through a central channel.
4. Data capture: keying, extraction or e-invoices.
5. Validation: duplicate checks, supplier and bank detail checks, arithmetic and tax.
6. Matching: to POs and receipts. See three-way matching.
7. Approval: according to an approval matrix.
8. Recording: posting to the ledger.
9. Payment: scheduled runs, approved and released.
10. Reconciliation: bank statements, supplier statements and the AP control account.

Supplier onboarding in detail

Most AP fraud and many errors start with supplier master data, so onboarding deserves care:

1. Collect a supplier form with legal name, trading name, registered address, tax identification number, contact details and bank details on the supplier's letterhead or through a supplier portal.
2. Verify identity: check company registration and tax numbers against public registers where available.
3. Verify bank details independently: call the supplier using a phone number obtained from an independent source, not from the form or email, to confirm the account. Some countries offer account name checking services that confirm whether the account name matches the payee.
4. Check for duplicates: is the supplier already in the system under a slightly different name?
5. Screen where required: sanctions lists, conflict of interest declarations for related parties.
6. Approve the new supplier by someone other than the person who entered it.
7. Record default terms: payment terms, currency, tax treatment, default expense account.

Apply the same verification to any later change of bank details. Fraudsters often impersonate genuine suppliers by email to announce "new bank details"; verification by phone to a known number stops most of these attempts.

Debit balances, unapplied credits and overpayments

An AP ledger should normally show credit balances: amounts the business owes. A debit balance on a supplier account means the supplier owes the business, typically because of:

• A credit note recorded but not used against a later invoice.
• An overpayment or duplicate payment.
• A payment recorded against the wrong supplier.
• A prepayment for goods not yet received.

Review debit balances monthly. Ask suppliers for refunds or apply credits to the next invoice. Old debit balances are often money that can be recovered with a phone call.

Roles in accounts payable

Role	Typical responsibilities
AP clerk or assistant	Invoice capture, coding, matching, filing, supplier queries
AP specialist or accountant	Exceptions, reconciliations, accruals, payment runs
AP supervisor or manager	Controls, approvals of master data changes, KPIs, team management
Financial controller	Policy, month-end sign-off, audit liaison
Approvers (budget holders)	Approving invoices for their area
Treasury	Cash forecasting, payment release, bank relationships

In a small business, one person, or the owner, may cover all of these. As the business grows, separating them is both a control and an efficiency gain.

Accounts payable as the business grows

AP evolves through recognisable stages:

• Owner-managed: bills paid from the banking app; records in accounting software, if any. Risk: missed bills, no audit trail.
• First bookkeeper: bills recorded in accounting software, weekly payment runs, monthly reconciliation.
• Small finance team: approval workflow, purchase orders for larger spend, supplier statement reconciliations.
• Established AP function: AP automation, three-way matching, KPIs, formal supplier onboarding, segregation of duties.
• Shared service or global AP: centralized processing across entities, e-invoicing, multi-currency payments.

Moving to the next stage is usually triggered by volume, an audit finding, a fraud attempt or a funding round that demands stronger controls.

Key AP reports

Accounts payable ageing

The AP ageing report lists unpaid invoices by supplier, grouped by how long they have been outstanding or by days until due:

Supplier	Current	1–30 days overdue	31–60	61–90	Over 90	Total
Paper Co	1,450	0	0	0	0	1,450
Freight Ltd	3,200	1,100	0	0	0	4,300
IT Services	0	0	2,750	0	0	2,750
Packaging Inc	980	0	0	0	420	1,400
Total	5,630	1,100	2,750	0	420	9,900

Overdue items need attention: are they disputed, waiting for approval or simply missed? Each answer calls for a different action, from chasing an approver to contacting the supplier. Very old small balances may be unapplied credits or duplicates.

Supplier statements reconciliation

Comparing each major supplier's statement of account with the AP ledger reveals missing invoices, unapplied credit notes and payments allocated to the wrong invoices.

AP control account reconciliation

The total of the AP subledger (all supplier balances) should equal the AP control account in the general ledger. Differences point to manual journals posted directly to the control account or system issues.

Cash requirements forecast

A schedule of invoices due by date shows how much cash will be needed for payments in each upcoming week.

AP and cash flow

AP is one of the main levers of working capital:

• Paying too early reduces cash available for operations without benefit, unless taking a discount.
• Paying too late damages supplier relationships, may incur late fees or interest, and can lead to worse terms or supply interruptions.
• Paying on time maximizes the free credit suppliers provide while keeping good relationships.

Metrics such as accounts payable turnover and days payable outstanding measure how quickly a business pays its suppliers.

Worked example

A business has monthly supplier purchases of 120,000 on 30-day terms. If it pays on day 30 instead of day 10, it keeps an extra 20 days of purchases in the bank: 120,000 × 20 ÷ 30 = 80,000 of additional cash on average, at no cost. If suppliers offered 2% for payment within 10 days, though, the discount would be worth 2,400 a month, an annualised return of roughly 37% on paying early, likely better than any other use of that cash.

Accounts payable in financial statements and analysis

AP appears on the balance sheet under current liabilities, and changes in AP appear in the cash flow statement. Under the indirect method, an increase in AP during the period is added back to profit in cash flow from operating activities, because expenses were recognised without cash leaving the business; a decrease is subtracted.

Analysts look at AP to understand:

• Working capital management: how much supplier credit the business uses.
• Liquidity stress: a sharp rise in AP, especially overdue AP, can signal cash difficulties.
• Supplier dependence: concentration of payables with a few suppliers.

Lenders reviewing a business may compare the AP ageing report with bank statements: are suppliers being paid on terms, or is the business stretching them? Our guide to bank statement analysis explains how payment patterns appear on statements.

Worked example: AP in the cash flow statement

A company reports net profit of 85,000. During the year, AP rose from 42,000 to 57,000. In the indirect cash flow statement, the 15,000 increase is added to profit, contributing to operating cash flow of 100,000 before other working capital changes. If AP had fallen by 15,000 instead, operating cash flow from the same profit would be 70,000. The difference is purely timing of supplier payments, which is why analysts look at AP trends and not just profit.

Internal controls in AP

AP is a common target for fraud and a common source of costly errors. Essential controls:

Risk	Control
Fake or altered bank details	Independent verification of any bank detail change using known contact details; dual approval of supplier master changes
Fictitious suppliers	Supplier onboarding checks; separation of supplier setup from invoice approval and payment
Duplicate payments	System duplicate checks; supplier statement reconciliations
Overbilling	PO matching and price checks
Unauthorized purchases	Approval matrix; PO policy
Payment errors	Dual authorization of payment runs
Concealment	Monthly bank reconciliation by someone independent of payments

Segregation of duties is the foundation: the person who sets up suppliers should not approve invoices, and the person who approves invoices should not release payments, wherever staff numbers allow. In small businesses where this is not possible, the owner reviewing bank statements and supplier changes is a strong compensating control.

Bank reconciliation is the final check that only approved payments left the account. If you work from PDF statements, a bank statement converter lets you compare every payment with the AP ledger quickly. See how to reconcile a bank statement.

AP metrics

Metric	What it tells you
Days payable outstanding (DPO)	Average days to pay suppliers
Invoice cycle time	Days from receipt to approval or payment
Cost per invoice	Efficiency of processing
On-time payment rate	Supplier relationship health
Discount capture rate	Value from early payment discounts
Exception rate	Process quality
Duplicate payment rate	Control effectiveness

Accounts payable in small businesses

Small businesses often handle AP informally, but a simple system pays off:

• Send all bills to one email address or your accounting software's inbox.
• Record bills in the software when they arrive, with due dates.
• Pay on the due date from a weekly payment session.
• Attach invoices to payments.
• Reconcile the bank account monthly.
• Review the unpaid bills report weekly.

Accounts payable at month-end

At period-end, AP teams typically:

• Process all invoices received for the period up to the cut-off.
• Accrue for goods and services received but not invoiced.
• Reconcile the AP subledger to the control account.
• Reconcile major supplier statements.
• Review the ageing report for overdue, disputed and debit balances.

See our month-end close checklist.

Common AP mistakes

• Paying from emails or PDFs without validating supplier and bank details.
• No central intake, so invoices are lost and paid late.
• Duplicate payments from resubmitted invoices.
• Missing accruals at month-end, understating expenses.
• Ignoring debit balances, such as unapplied credits and overpayments.
• No segregation of duties.
• Not reconciling supplier statements or the AP control account.

Frequently asked questions

Is accounts payable an asset or a liability?

Accounts payable is a liability. It represents money the business owes to suppliers, usually due within a year, so it is classified as a current liability on the balance sheet.

What is the journal entry for accounts payable?

When an invoice is recorded, debit the expense, inventory or asset account (and recoverable tax) and credit accounts payable. When the invoice is paid, debit accounts payable and credit cash.

What does an accounts payable team do?

The AP team receives and validates supplier invoices, matches them to orders and receipts, obtains approvals, records them, schedules and makes payments, manages supplier queries and reconciles supplier accounts and the AP ledger.

Is accounts payable an expense?

No. The expense is recognised in the profit and loss account; accounts payable is the corresponding obligation on the balance sheet until the supplier is paid.

What is the difference between accounts payable and accrued expenses?

Accounts payable relates to supplier invoices that have been received and recorded. Accrued expenses are costs that have been incurred but not yet invoiced, such as utilities used in the last weeks of the month, and are recorded by estimate until the invoice arrives.

How often should accounts payable be reconciled?

Monthly at a minimum: reconcile the AP subledger to the general ledger control account, review the ageing report and reconcile statements from major suppliers. The bank account used for payments should also be reconciled monthly.

What is a good accounts payable turnover?

It depends on the industry and supplier terms. A turnover consistent with paying on agreed terms is generally healthy. Paying much faster may waste cash, and much slower may strain supplier relationships.

Summary

Accounts payable is what a business owes its suppliers and the process of managing those obligations. Record invoices accurately, follow a controlled process from receipt to payment, pay on time rather than early or late, watch the ageing report, and protect the process with strong controls on supplier data, duplicates and segregation of duties. Reconcile the bank to confirm only approved payments went out.

Convert your bank statements with StatementPilot to reconcile supplier payments against your AP ledger quickly.