Invoice Due Date Calculator
Calculate when an invoice is due based on issue date and payment terms (net 7, 14, 30, 60). Free.
How to use
What 'Net X' means
Net 30 = payment due 30 days from invoice date. Due on receipt = payable immediately. Net terms always run from the invoice date, not the work completion date — so issuing invoices quickly compresses the wait. UK Late Payment regulations set a statutory 60-day limit for B2B (unless otherwise contractually agreed).
Late payment penalties (UK)
From 2013, UK businesses can charge statutory late-payment interest at Bank of England base rate + 8%. With base rate at 4.75% in 2026, statutory late interest is 12.75% per annum. You can also claim a fixed compensation fee (£40-£100 depending on invoice size) per late invoice. These can be claimed without going to court.
In the UK, the Late Payment of Commercial Debts Regulations 2013 sets the statutory payment period at 60 days for B2B (or 30 days if not contractually specified). Late payment interest is the Bank of England base rate + 8%. As of 2026 with base rate at 4.75%, statutory late interest is 12.75% per annum — typically much higher than commercial loan rates.
Tracking due dates is the #1 cause of late payment for small business owners. Even a simple calendar reminder for each invoice due date dramatically improves cash flow. The bigger gain is sending the invoice quickly — the 'net 30' clock starts when the invoice is delivered, not when work is done.