Invoice due date calculator

How invoice due dates work

The due date is the day your client must pay by. It is normally calculated from the invoice date by adding the payment terms: an invoice dated 1 June with Net 30 terms is due on 1 July. Writing both the terms and the exact date on the invoice leaves no room for “I thought I had longer”.

Common payment terms explained

• Due on receipt — payment is expected immediately. Best for small jobs, one-off clients and retail.
• Net 7 / Net 15 — a short window that keeps cash flow healthy. Popular with freelancers and tradespeople.
• Net 30 — the most common B2B standard. Larger companies often ask for it by default.
• Net 45 / 60 / 90 — usual for enterprise and government clients, but hard on a small business's cash. Price it in or negotiate.
• 2/10 Net 30 — a 2% discount if paid within 10 days, otherwise the full amount in 30. Use the discount calculator to see what it costs you.

Tips for getting paid on time

Send the invoice the day the work is finished, not at the end of the month. Put the due date in bold near the total, accept at least one easy payment method, and set a reminder for the day before and the day after the deadline. If a payment is late, charge what you agreed to — the late fee calculator shows the amount. Our guide on writing an invoice that gets paid faster covers the rest.

Frequently asked questions

What does Net 30 mean on an invoice?

Net 30 means payment is due 30 days after the invoice date. An invoice dated June 1 with Net 30 terms is due July 1.

Does the due date count from the invoice date or the delivery date?

Unless your contract says otherwise, payment terms count from the invoice date. State the terms and the exact due date on the invoice to avoid disputes.

What if the due date falls on a weekend?

The calculator flags weekend due dates. Many businesses pay on the next business day, but it is best to agree this in advance.

Can I change payment terms after sending an invoice?

Only if the client agrees. Set your standard terms before the work starts, ideally in a quote or contract.