What to put on an invoice so it gets paid the first time

01The fields, and why each one is there#

A business invoice has two readers: the person who bought from you, who checks it against what they agreed to, and an accounts payable clerk, who checks it against a vendor record and a purchase order and has no idea who you are. Every field below answers a question one of them would otherwise email you about, usually after the due date.

• Your legal entity name and address, exactly as on your W-9: the company the customer pays, not a product name.
• The customer’s legal entity name and billing address, matching the entity on the contract.
• A unique invoice number from an unbroken sequence the system assigns.
• The invoice date, the payment terms in words (Net 30) and the due date they produce.
• The customer’s purchase order number, when they issued one.
• Line items: description, service period, quantity, unit price and amount.
• Subtotal, discounts, each tax line by jurisdiction and rate, and the total.
• Amount paid and credited so far, and the balance due, shown largest.
• Remit-to details and accepted payment methods: a payment link, ACH details, a mailing address for checks.
• A contact for billing questions who actually answers.

02Names, numbers and dates#

Use legal names on both sides. If your contract is with Acme Holdings, Inc. and the invoice says Acme, the customer’s AP system may not match it to a vendor or a contract, and the invoice waits in an exceptions queue. The same goes for you: the name on the invoice should match the W-9 you gave them and the bank account they will pay.

Invoice numbers should be unique and sequential, assigned by QuickBooks Online, Xero or your billing system and never chosen by hand. A gap in the sequence is a standard question in any review, because it is how a deleted invoice or a skipped one is found. Dates matter in three places: the invoice date, which is when the receivable is recorded; the due date, which drives the aging; and the service period on each line, which is what revenue recognition reads. An annual subscription invoiced on October 1 is not October revenue, and the service period on the line is what tells the books so.

03Line items and sales tax#

Describe each line so a stranger could tell what was delivered: the plan, the seats, the period. “Services” is not a line item. Discounts belong on their own line, so the list price and the concession both stay visible.

Sales tax is set by each state, and in some places by cities and counties on top. If you are registered in the customer’s state and what you sell is taxable there, show the tax as its own line per jurisdiction and rate, not one lump labeled Tax. Most states expect the tax to be stated separately from the price, and a customer disputing it needs to see which authority and which rate you applied. Tax you collect is not revenue: it is a liability you owe the state until you file. If a customer is exempt, keep their exemption or resale certificate on file before you issue the invoice without tax, because the state will ask you for it, not them.

A worked example. You invoice a customer $10,000 for a service that is taxable in their state at an assumed combined rate of 6%. The invoice total is $10,600. On the debit side, accounts receivable $10,600; on the credit side, revenue $10,000 and sales tax payable $600. When the customer pays, debit cash $10,600 and credit accounts receivable $10,600. When you file, debit sales tax payable $600 and credit cash $600. Revenue never sees the tax.

04Purchase orders, remit-to and payment instructions#

Larger customers pay against purchase orders. Their AP team matches your invoice to the PO and to a receipt before they pay, and an invoice without the PO number is often sent back, or simply not paid until someone notices. Ask for the PO before you send the first invoice, put it on every invoice under it, and watch the PO’s remaining balance: an invoice that exceeds it will also stop.

Tell the customer how to pay you on the invoice itself: a payment link for card or ACH debit, your bank’s ACH routing and account numbers for a transfer, and a mailing address if you accept checks. Change bank details only through a verified channel and tell customers to call before they act on a request to change them, because a fake “we’ve changed banks” email is one of the most common payment frauds against small companies.

05Fixing a sent invoice: credit notes, not edits#

Once an invoice has gone out it is a record both sides hold. Correct it with a credit note that references the original invoice number and states the reason, then issue a new invoice if something is still owed. Your books, the customer’s books and the aging all agree on what happened, and when.

A worked example. You invoiced $10,600 including $600 of tax, and the customer was entitled to a $1,000 price concession. The credit note is $1,060: debit revenue (or a sales returns and allowances account) $1,000 and sales tax payable $60, credit accounts receivable $1,060. The customer now owes $9,540, the tax you report falls by the right amount, and the original invoice is untouched.

Voiding is narrower: an invoice that should never have existed, unpaid and in a month that is still open. In a closed month, even a mistake is corrected by a credit note dated in the open month, so the statements you already sent still say what they said.

06When it starts to matter#

With three customers paying by card on a self-serve plan, the billing system’s receipt is the invoice and none of this is urgent. It matters from the first contract with a company that has a procurement team, the first state where you register for sales tax, and the first time someone asks for your accounts receivable aging. Build the template before then; fixing a year of invoices afterwards means credit notes for every one of them.