Payment terms

Net 30 Invoice: Payment Terms and Due Dates

Set a 30-day due date, show payment instructions clearly and track whether the invoice becomes overdue.

“Net 30” describes a 30-day payment period, but the parties should specify when counting starts. A calendar due date on the invoice removes ambiguity about when that period ends.

Confirm the payment term in the contract, accepted estimate or purchase order before creating the invoice. Net 30 is a commercial agreement, not a universal rule that automatically applies to every client.

The application can calculate a due date from the invoice date, display payment instructions and classify an unpaid invoice as overdue after the deadline. It does not send reminders or collect the payment.

Create a Net 30 invoice

Create a clear Net 30 invoice

  1. 1

    Verify the agreed starting point

    Check whether the agreement measures 30 days from the invoice date, delivery, acceptance or another event. Do not assume the label alone settles this.

  2. 2

    Set the invoice and due dates

    Enter the invoice date and a specific calendar due date. A saved 30-day maturity default can calculate the deadline for ordinary invoices.

  3. 3

    Add payment instructions

    Choose bank transfer, cash or a custom method and add the details needed to identify and complete the payment. Include an approved purchase-order reference when relevant.

  4. 4

    Track the status after sending

    Send the downloaded PDF yourself. Keep it unpaid until receipt is verified; after the due date, an unpaid invoice appears overdue.

Example: 30 days from the invoice date

A contractor issues an invoice on December 2 under terms that explicitly allow 30 calendar days from the invoice date. The invoice shows January 1 as the due date and includes the agreed payment method and project reference.

  • Invoice date: December 2.
  • Payment term: 30 calendar days from invoice date.
  • Specific due date: January 1.

Write the date, not only the shorthand

A client may interpret Net 30 from receipt, completion or invoice date. Showing the actual due date makes the intended deadline easier for both parties to review.

If the agreed term changes, update the date before downloading the PDF. The saved default is a convenience, not authority to override the contract.

Use status as a follow-up list

An unpaid invoice before its deadline is upcoming; after the deadline it is overdue. Once you verify the correct payment, mark it paid to remove it from the unpaid workload.

The status does not record payment dates, partial payments, late fees or collection activity. Keep those records in the appropriate financial system.

Terms are not enforced automatically

Simple Invoicing does not negotiate terms, send invoices or reminders, calculate interest, charge cards or collect debts.

Payment laws and contract rules vary. Confirm your terms and seek professional advice for disputes or regulated transactions.

Related guides

Track paid and unpaid invoices Small business invoice checklist Small business invoice numbering

Frequently asked questions

Not necessarily. The agreement should identify the starting event. This guide’s example uses the invoice date because the parties agreed to it.

Yes. Save a 30-day maturity period for new invoices, then override individual invoices when their terms differ.

No. It shows the unpaid invoice as overdue but does not send reminders or collect payment.

Create an invoice with an unambiguous due date

Record the agreed term, show the calendar deadline and include the payment details your client needs.

Create a Net 30 invoice