Invoice payment terms: Net 15, Net 30, and due-date examples

Write clear invoice payment terms with Net 15 and Net 30 examples, an explicit due date, deposit checks, and a practical follow-up checklist.

Agree the timing before you send the invoice

Invoice payment terms explain when payment is expected and how the customer should pay. They work best when the quotation or contract already contains the same agreement. A new deadline added only after the work is complete can create a disagreement instead of a clear payment request. Confirm the billing contact and approval process before choosing the date.

Australian Government guidance treats payment methods, timing, credit arrangements, and overdue-payment handling as parts of payment terms. That is useful planning guidance, not a worldwide contract rule. Check the rules that apply to your agreement before adding interest, penalties, or collection costs. This guide explains document preparation, not legal entitlement to a fee.

Translate Net 15 or Net 30 into one explicit date

Net 15 and Net 30 commonly describe payment due 15 or 30 days after an agreed starting event. Specify that event: invoice issue, invoice receipt, or acceptance can produce different deadlines. Also state whether you mean calendar days. Do not assume the customer interprets an abbreviation the same way you do.

For these examples only, the agreement starts counting calendar days after an issue date of 2026-09-09. Net 15 gives a due date of 2026-09-24; Net 30 gives 2026-10-09. Write the date as well as the term. If the agreement instead says 30 days after receipt, use the actual receipt date and resolve any difference before finalizing the invoice.

Example wording for a completed service

An illustrative payment instruction is: "Payment of the invoice total is due by 2026-09-24, 15 calendar days after the issue date. Pay in USD by the agreed bank-transfer method and include invoice reference INV-2026-0042. Contact the billing contact shown above with questions about this invoice." Replace every example detail with the agreement and verified payment instructions.

Keep the amount, currency, due date, and reference consistent across the document and your covering email. If a customer requires a purchase-order reference or supplier onboarding, complete that process as well. A readable invoice cannot bypass a missing approval or an unregistered supplier record in the customer's system.

Separate deposits and conditional discounts

For milestone work, state exactly which stage this invoice covers. A deposit already received is different from a deposit now being requested. Compare earlier invoices and payment records before choosing the current amount; do not rely on a note about a deposit to change the calculated total.

An early-payment discount is also different from an unconditional price reduction. For a purely illustrative USD 1,000 amount before tax, a 2% discount would reduce that amount to USD 980. But the eligibility deadline and tax treatment need separate agreement and review. Do not insert a permanent line discount when the customer is entitled to it only after meeting a condition.

Enter and review the terms in QuoteBill

Sign in, open an invoice template, and set "Due date" to the agreed date. Add the payment wording in "Terms" and check "Country / currency". The initial due date is a starting value, not evidence of customer agreement. QuoteBill does not automatically collect payment or send overdue reminders through this document workflow.

Use "Save to cloud", confirm success, then choose "Print / PDF". Open the saved PDF and compare its total and due date with the accepted terms. Send it through your usual channel and record the delivery separately.

  • Confirm the starting event, calendar-day convention, and explicit payment deadline.
  • Check payment instructions, currency, invoice reference, and the accounts-payable recipient.
  • Reconcile deposits and earlier invoices without charging the same stage twice.
  • Track the due date separately; check payment records before sending a polite reminder.

Sources

100 Free Invoice and Quotation Templates

  • Free invoice generator

    Create an invoice online with your logo, customer details, line items and tax settings. Review the preview and save as PDF. Free account required.

  • Consultant invoice template

    Create a consulting invoice for hourly or project work, research and report delivery. Add payment terms, review the total and export PDF.

  • Blank invoice template

    Invoice for Item or service.