Accounts payable is the money your business owes suppliers and vendors for goods and services you have already received. Every unpaid bill — the lumber yard invoice, the monthly software charge billed on terms, the subcontractor's statement — is part of it. On the balance sheet it is a liability, and it is usually one of the first numbers a lender or buyer looks at.
Many small businesses do not manage payables at all. Bills sit in an inbox or a pile on the desk and get paid when someone remembers or when a vendor calls. That works until it doesn't: a late fee here, a duplicate payment there, a supplier who puts you on cash-only terms. A simple, repeatable process fixes most of it.
Record bills when they arrive, not when you pay them
The core habit is entering each bill into your accounting system the day it arrives, with the vendor, the bill date, the due date, the amount, and the expense category. That creates the payable. When you pay it later, the payment is applied against that bill and the payable goes away. If you only record expenses when the money leaves the bank, you have no accounts payable at all — just a bank account that surprises you.
Entering bills on arrival also puts the expense in the right month. A $4,000 materials bill dated in March belongs to March's costs, even if you pay it in April. Without that, your monthly profit swings with your payment timing rather than with what actually happened in the business.
Keep one place where bills land. A dedicated email address for vendor invoices, or a single tray for paper ones, prevents the most common failure: a bill that nobody saw until the second notice.
Check every bill before it gets paid
Before approving a bill, confirm three things match: what you ordered, what you received, and what you are being charged. For a business that uses purchase orders this is the classic three-way match. For a smaller operation it can be as simple as the person who ordered the goods initialing the invoice to confirm they arrived and the price is right.
Watch for duplicates. Vendors send statements, reminders, and re-sent invoices, and each can look like a new bill. Before entering a bill, search for the vendor and amount; most accounting systems will also warn you about a repeated invoice number, but only if the invoice number was entered the first time.
Be suspicious of any request to change a vendor's bank details. A sudden email asking you to send payments to a new account is a common fraud pattern. Confirm any change by calling the vendor at a phone number you already have on file, not one listed in the email.
Pay on schedule, not on impulse
Set a regular payment run — weekly or every two weeks — and pay the bills that are due before the next run. Paying everything the moment it arrives drains cash you may need; paying only when vendors chase you costs late fees and goodwill. A payment schedule sits between the two.
Read the terms on each bill. Net 30 means payment is due 30 days after the invoice date. Some vendors offer an early-payment discount, written as something like 2/10 net 30: a 2% discount if paid within 10 days, otherwise the full amount in 30. Whether to take a discount like that is a cash decision, but it should be a decision, not an accident.
Record each vendor's tax information as you go. Collect a Form W-9 from any contractor or unincorporated vendor before the first payment, and mark which vendors are 1099-eligible. Anyone paid $600 or more for services during the year generally needs a Form 1099-NEC, and assembling that list in January is far easier when the payables records already flag it.
Use the AP aging report every month
The accounts payable aging report lists what you owe, grouped by how long each bill has been outstanding — current, 1 to 30 days past due, 31 to 60, and so on. Reviewed monthly, it shows which vendors need attention and whether the business is quietly falling behind. It also catches errors: a bill that appears 120 days overdue is often one that was actually paid, but the payment was never applied to it.
At month end, the total on the aging report should equal the accounts payable balance on your balance sheet. If they differ, something was posted directly to the payables account instead of through a bill or a payment, and it should be tracked down before the error compounds.
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