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Invoice Due Date Calculator

Choose the invoice date and payment terms. We give you the due date, flag weekends and show when statutory interest starts running.

100% freeNo signupNet, EOM & custom terms
Payment is due on
Days from invoice date
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Statutory interest can start (B2B)

Common payment terms explained

TermsMeaningInvoice dated 10 March is due
Due on receiptPayable immediately10 March
Net 77 days after the invoice date17 March
Net 1414 days after the invoice date24 March
Net 3030 days after the invoice date9 April
EOMThe last day of the invoice month31 March
30 days EOM30 days after the end of the invoice month30 April

How long can payment terms be in the UK?

Between businesses, terms over 60 days are only valid if expressly agreed and not grossly unfair to the supplier. Public bodies must pay within 30 days. If no terms were agreed at all, payment is due 30 days after the customer received the invoice or the goods/services, whichever is later.

A Bill before Parliament in 2026 (the Commercial Payments Bill) would set a hard 60-day maximum for most business contracts, no earlier than 2027. It is not law yet.

Shorter terms get you paid sooner. Most freelancers use 7 or 14 days — and put the terms in writing with a late payment clause.

FAQ

Frequently asked questions

What does Net 30 mean?

Payment is due 30 calendar days after the invoice date. Net 14 is 14 days, and so on. Weekends and bank holidays count unless your contract says otherwise.

What does "30 days EOM" mean?

End of month: count from the last day of the month the invoice is dated in. An invoice dated 3 March on 30 days EOM is due 30 April.

What if no payment terms were agreed?

For B2B sales in the UK, payment is due 30 days after the customer received the invoice or the goods/services, whichever is later. After that, statutory interest can run.

Is there a legal maximum for payment terms?

Not yet for most private-sector contracts. The current law allows up to 60 days between businesses unless longer is expressly agreed and not grossly unfair. A Bill before Parliament in 2026 would cap most terms at 60 days, no earlier than 2027.

Should the due date be on a weekend?

Nothing stops it, but payments due on a Saturday often land on Monday. Many freelancers simply use terms that land on a weekday.

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