UK Net 30 Invoice Due Date Calculator
Enter a UK invoice date and select payment terms (Net 30, Net 60, End of Month, or custom) to get the exact due date. The calculator shows days remaining, overdue status, and follow-up timing.
Enter the invoice date and payment terms — get the exact due date, days remaining or overdue, and a suggested follow-up checkpoint.
After calculating, copy the result into your workflow instead of searching for the calculator again.
Calculate first, then reuse the result
After you calculate, UtilityPilot can turn the result into a clean note you can paste into your SOP, spreadsheet, CRM, Slack, Notion, checklist or email.
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Formula
Due Date = Invoice Date + Payment Term (in calendar or business days)
Calendar days: add the term number directly to the invoice date regardless of weekends. Business days: advance one weekday at a time, skipping Saturday and Sunday. End of month: last calendar day of the invoice month, optionally plus 15 days.
Worked Examples
Scenario 1 — Net 30 calendar days:
Invoice issued Monday 2 March 2026. Terms: Net 30 calendar days.
Due date: 2 March + 30 days = Thursday 1 April 2026
Scenario 2 — Net 30 business days (same invoice):
Same invoice, but terms specify Net 30 business days.
30 weekdays from 2 March ≈ Wednesday 13 May 2026
That is 6 weeks and 4 days later — a material difference.
Scenario 3 — End of month:
Invoice issued 10 February 2026. Terms: End of month.
Due date: last day of February = Saturday 28 February 2026
Scenario 4 — Checking an overdue invoice:
A Net 60 invoice was issued on 1 January 2026. Today is 15 March 2026. Is it overdue?
Due date: 1 January + 60 days = 2 March 2026
Today (15 March) − Due date (2 March) = 13 days overdue
Always confirm whether your contract specifies calendar or business days. Net 30 in calendar days is significantly different from Net 30 in business days.
Common Mistakes
- Assuming Net 30 means business days. Standard Net 30, Net 60 etc. almost always refer to calendar days unless the contract explicitly states otherwise.
- Starting the count from the day after. Day 0 is the invoice date. Day 1 is the next day. A Net 7 invoice dated Monday is due the following Monday.
- Ignoring weekend and holiday adjustments. If the due date falls on a Saturday, Sunday or public holiday, the operational deadline usually moves to the next business day.
- Confusing End of Month with Net 30. End of Month means due on the last day of the invoice month. Net 30 adds 30 days to the invoice date — a different result for most invoice dates.
Guide
How to Use
- 1
Enter the invoice date
The date the invoice was issued to the client.
- 2
Select payment terms
Choose from Due on Receipt, Net 7 through Net 90, End of Month, EOM + 15 or a custom day count.
- 3
Choose calendar or business days
Most standard net terms use calendar days. Switch to business days only if your contract specifies it.
- 4
Review the result
The result shows the due date, days remaining or overdue status, a follow-up checkpoint date, and a weekend warning if applicable.
- 5
Copy the follow-up note
Copy a ready-to-use professional note for email, CRM or your invoice checklist.
Next Steps
What to do next
Adjust due date for weekends / holidays
Find the real operating due date after weekends and public holidays.
Add VAT to the invoice
Get your net, VAT, and gross total before you send.
Count business days until due
See exactly how many working days remain before the due date.
Add N business days to any date
Find the date that is exactly 10, 14, or 30 working days from today.
Invoice & Payment Workflow
Real Due Date Calculator
Adjust due dates for weekends and public holidays
VAT Calculator
Add or remove UK VAT (20%, 5%, zero) from invoice amounts
UK VAT Calculator
Net/VAT/gross breakdown at HMRC rates
Margin Calculator
Check profitability before sending the invoice
Add Business Days
Find the date N working days from any start date
Business Days Calculator
Count working days between any two dates
Working Days by Country
Standard UK payment terms
| Term | Days | Notes |
|---|---|---|
| Net 30 | 30 calendar days | Most common UK B2B term |
| Net 60 | 60 calendar days | Large enterprise and government |
| End of Month | Last day of month | Consolidated billing |
| EOM + 30 | End of month + 30 days | Common in manufacturing supply chains |
| Statutory default | 30 days (B2B) | UK Late Payment Act default |
Save this in your team workflow
Bookmark this page and share with your accounts team so you do not need to search again. Use the Copy result button to paste the due date into your invoice, accounting software, or CRM.