What Is Accounts Payable? Definition, Process & Examples
Accounts payable explained in plain English — definition, the AP process step by step, journal entries, an example, and Days Payable Outstanding.
Quick Answer
Accounts payable (AP) is the total amount of money a business owes to its suppliers for goods or services received on credit but not yet paid for. It is recorded as a current liability on the balance sheet under accrual accounting. AP is created when a vendor bill is received and settled when the business pays the bill.
Accounts payable is the money you owe your vendors. Manage it well and it becomes free short-term financing for your business. Manage it poorly and it costs you late fees, damaged relationships, and surprise cash crunches.
Table of contents
What Is Accounts Payable?
Accounts payable (AP or A/P) is the money a business owes its suppliers for products or services received on credit. It appears on the balance sheet as a current liability because payment is due within 12 months — typically within 15 to 60 days.
Like AR, AP only exists under accrual accounting. Cash-basis businesses simply record expenses when they pay, skipping AP entirely.
The Accounts Payable Process
A clean AP process has five steps: (1) receive vendor invoice, (2) match it to a purchase order or receipt, (3) approve for payment, (4) record the bill in AP, and (5) pay on or before the due date.
In a small business, all five steps might be the owner; in a larger business they're split across AP staff, managers, and approvers. The principles are the same.
Accounts Payable Example
Acme Studio receives a $600 bill from its software vendor on May 1 with Net 30 terms. The accountant records:
- May 1: Debit Software Expense $600 / Credit Accounts Payable $600
- May 30: Acme pays. Debit Accounts Payable $600 / Credit Cash $600
For those 30 days, the $600 lives in AP. The expense hit the P&L immediately, but the cash didn't leave the bank until day 30.
AP Aging Reports
An AP aging report groups unpaid bills by how long they've been outstanding — 0–30, 31–60, 61–90, and 90+ days. Anything in 60+ is overdue and probably costing late fees or damaging the vendor relationship.
Days Payable Outstanding (DPO)
DPO measures how long you take to pay vendors on average. Formula: (Accounts Payable ÷ Cost of Goods Sold) × Number of Days in Period.
A higher DPO — as long as you stay within agreed terms — means you're using vendor credit as free working capital. A DPO of 30 days on $50,000 of monthly payables is effectively a $50,000 interest-free loan.
How to Manage Accounts Payable
Three rules: (1) never pay late — late fees and broken relationships cost more than the cash you'd save; (2) never pay early unless there's a discount (Net 30 means pay on day 30, not day 5); (3) automate bill capture with software like Bill.com, QuickBooks, or Xero so nothing is missed.
Best Ways to Get Started
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Automate bill capture
Forward vendor invoices to a dedicated email; software reads, codes, and queues them for approval.
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Pay on the due date, not before
Holding cash to day 30 of Net 30 is free financing.
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Take early-payment discounts
A 2/10 Net 30 discount (2% off if paid in 10 days) is an annualized return of ~36%. Always take it.
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Negotiate longer terms with vendors
Many will extend Net 15 to Net 30 or Net 45 if you ask — especially after a year of on-time payments.
Step-by-Step Plan
- 01
Receive the vendor invoice
Email or paper. Capture into your system immediately.
- 02
Verify and match
Match to a PO or to the goods/services received. Catch billing errors here.
- 03
Approve the bill
Owner or manager review for legitimacy before it enters AP.
- 04
Record in AP subledger
Accounting software auto-generates the journal entry.
- 05
Schedule payment for the due date
Most software will batch-pay on a chosen day each week.
- 06
Reconcile AP monthly
Subledger total = AP account balance on the GL.
AP Aging Report Example — Acme Studio
| Vendor | 0–30 Days | 31–60 Days | 61–90 Days | 90+ Days | Total |
|---|---|---|---|---|---|
| Software Vendor | $600 | $0 | $0 | $0 | $600 |
| Office Supplies Co. | $340 | $0 | $0 | $0 | $340 |
| Contractor | $2,500 | $1,200 | $0 | $0 | $3,700 |
| Utilities | $0 | $0 | $280 | $0 | $280 |
| Total | $3,440 | $1,200 | $280 | $0 | $4,920 |
Mistakes to Avoid
- ✗Paying bills as they arrive instead of on the due date — gives up free working capital.
- ✗Missing early-payment discounts on terms like 2/10 Net 30.
- ✗Forgetting to record a bill until it's paid — understates liabilities.
- ✗Losing vendor invoices in email — leads to surprise overdue notices.
- ✗Mixing personal and business AP because of one shared credit card.
Pro Tips Advanced
- ★Set up a weekly 'pay day' — batch-pay all due-this-week bills in 15 minutes.
- ★Always take 2/10 Net 30 discounts — the implied annual return is about 36%.
- ★Audit recurring vendor bills quarterly — subscription drift quietly inflates AP.
- ★Watch DPO trend, not just the number. A rising DPO can signal cash flow stress.
Frequently Asked Questions
Sources
- • Publication 334: Tax Guide for Small Business — Internal Revenue Service
- • Generally Accepted Accounting Principles (GAAP) — Financial Accounting Standards Board
- • Small Business Financial Management — U.S. Small Business Administration
All articles are reviewed for factual accuracy by a credentialed accounting professional before publication.
Elena is a Certified Public Accountant with 14 years of experience advising small businesses on bookkeeping systems, tax planning, and financial controls. She previously led the small business advisory practice at a regional accounting firm.
