Payment terms

When is this
invoice due?

Pick an invoice date and your payment terms to get the due date, how long is left and when interest can start.

Net, end of month and fixed-day terms
No agreed terms covered
No sign-up

Payment due

Pick a date

Add the invoice date and your payment terms.

Invoice date

Terms usually run from the invoice date. If yours run from the day the customer receives it, use that day.

Payment terms

Days to pay

Customer

If it is paid late, the late payment interest calculator works out the statutory interest and compensation you can add.

Put this calculator on your site

Free to embed on any website or blog. It needs no script, sets no cookies and works in any page builder that accepts an iframe.

Embed code

<iframe
  src="https://taptax.co.uk/tax-calculator/invoice-due-date/embed"
  title="Invoice due date calculator"
  width="100%"
  height="520"
  loading="lazy"
  style="border:1px solid #e5e7eb;border-radius:12px;max-width:100%"
></iframe>
<p style="font-size:12px">
  <a href="https://taptax.co.uk/tax-calculator/invoice-due-date">Invoice due date calculator by TapTax</a>
</p>

30 days

when no payment date was agreed

60 days

the usual limit for a business customer

30 days

for a public sector customer

Payment terms: The agreement on when an invoice must be paid, written on the invoice and ideally agreed before the work starts. The due date is the last day payment counts as on time.

Common payment terms, worked out

For an invoice dated 15 March, each common term falls due on:

Term	What it means	Due
Due on receipt	Payable as soon as the customer has the invoice.	15 March
Net 7	Seven days after the invoice date.	22 March
Net 14	Fourteen days after the invoice date.	29 March
Net 30	Thirty days after the invoice date. The most common UK term.	14 April
Net 60	Sixty days: the usual ceiling for a business customer.	14 May
End of month (EOM)	The last day of the month the invoice is dated in.	31 March
30 days EOM	Thirty days after the end of the invoice month.	30 April
20th of the following month	A fixed day in the month after the invoice, common with monthly payment runs.	20 April

If you never agreed a date

The law fills the gap. With no agreed payment date, a business customer’s payment is late 30days after it receives the invoice or after you deliver the goods or service, whichever is later. Choose “None agreed” in the calculator and add the delivery date if it came after the invoice.

How long you can give a customer

You can set any term shorter than the limits, and many sole traders ask for 7 or 14 days. An agreed date should usually be within 60 days for a business customer; longer is allowed only if it is fair to both businesses. A public sector customer should usually pay within 30 days.

Put the date on the invoice, not just the term

“Net 30” leaves the customer to do the maths and invites an argument about which day counts. A line such as “Payment due by 14 April” next to the term removes it, and makes the day late payment interest starts beyond doubt.

When that day passes, the late payment interest calculator works out the statutory interest and compensation you can add.

Key takeaways

Net terms count days from the invoice date; end-of-month terms count from the last day of that month.
With no agreed date, payment is late 30 days after the later of receipt and delivery.
Keep business terms within 60 days unless longer is fair to both sides.
Write the actual due date on the invoice as well as the term.

Frequently asked questions

What does net 30 mean?

The invoice must be paid within 30 days of the invoice date. An invoice dated 1 March on net 30 is due on 31 March.

What does 30 days end of month mean?

Thirty days after the last day of the month the invoice is dated in. An invoice dated 15 January is due 30 days after 31 January, which is 2 March in a year when February has 28 days.

When is an invoice due if no payment terms were agreed?

For a business customer, payment is late 30 days after the customer receives the invoice or you deliver the goods or service, whichever is later.

What is the longest payment term allowed?

An agreed payment date should usually be within 60 days for a business customer, and longer only if that is fair to both businesses. Public sector customers should usually pay within 30 days.

When can I start charging late payment interest?

From the day after the due date. The late payment interest calculator works out the statutory interest and the fixed compensation you can add.

TapTax creates and sends your invoices, tracks which ones are paid and files your quarterly updates to HMRC. Start on the free plan, no card needed.

Get started free

Where these figures come from

Rates from GOV.UK.

When is thisinvoice due?