Invoice Due Date Calculator
Find an invoice's due date on any payment terms, from due on receipt to net 90 and net 30 end of month, see how many days it is overdue and the late interest if your terms allow it. Free, no signup.
Full guide: Payment reminder email templates, friendly to final →
Still tracking due dates in a spreadsheet?
A free Make scenario can watch your invoices, send reminders on schedule and stop when the customer pays.
See the reminder automation Start free on MakeAffiliate link: if you sign up to Make through it, The Gantry may earn a commission at no extra cost to you. Bigger than one calculation? Book a free 20-minute systems review.
What payment terms mean
- Due on receipt: payable on the invoice date.
- Net 30: payable within 30 calendar days of the invoice date. Net 7, 14, 45, 60 and 90 work the same way.
- Net 30 EOM: 30 days after the end of the month in which the invoice is dated, so an invoice dated 3 March is due on 30 April.
Worked example: an invoice dated 3 October on net 30 terms is due on 2 November. On 20 November it is 18 days overdue. If your agreed terms allow 8% a year late interest on S$4,800, that is S$4,800 × 8% × 18 ÷ 365 = S$18.94.
Late interest
Only charge late interest if your terms and conditions say so and the customer agreed to them. Many small businesses use it as a lever in the final notice rather than charging it routinely.
When to remind
A courtesy note three days before the due date, a reminder on the day, a friendly reminder at 7 days, a firm one at 14 to 30 days and a final notice at about 45 days. The free reminder writer drafts the right one for each late customer.
Questions
What does net 30 mean? Payment is due within 30 calendar days of the invoice date. An invoice dated 1 June on net 30 terms is due on 1 July.
What does net 30 EOM mean? Payment is due 30 days after the end of the month in which the invoice is dated, which gives the customer longer than plain net 30.
Can I charge interest on late payments? Only if your terms say so and the customer accepted them. State the rate and how it is calculated on your invoices and terms.
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