Germany Invoice Due Date Calculator

Enter a German invoice date and select Zahlungsziel (payment terms) to calculate the exact due date. Supports Net 14, Net 30, Net 60, End of Month, and custom terms. Includes BGB §286 context on Germany's 30-day default payment rule.

Calculate German invoice due date
BGB §286 default: Under German civil law, if your invoice does not specify a payment date, the debtor automatically enters default (Verzug) 30 days after invoice receipt and delivery — giving you the right to charge late interest without a separate reminder (Mahnung).

Enter the invoice date and payment terms — get the exact due date, days remaining or overdue, and a suggested follow-up checkpoint.

Net 30 invoicesAccounts receivableOverdue checksB2B payment termsSupplier invoicesEnd of month terms
Example: Invoice 15 Apr · Net 30 → due 15 May • Invoice 1 Jan · Net 60 → due 2 Mar • Invoice 5 Feb · End of month → due 28 Feb

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Next, you may need…

Adjust due date for weekends

Move the due date to the next working day if it falls on a weekend or holiday

Count working days until due date

How many business days remain before the payment deadline?

Copy payment reminder note

Get a client-ready payment note to paste into your email or SOP

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. 1

    Enter the invoice date

    The date the invoice was issued to the client.

  2. 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. 3

    Choose calendar or business days

    Most standard net terms use calendar days. Switch to business days only if your contract specifies it.

  4. 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. 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.

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Common German Zahlungsziel terms

German termMeaningDays
Zahlbar sofort / netto KasseDue immediately0 days
14 Tage nettoNet 1414 calendar days
30 Tage nettoNet 3030 calendar days
60 Tage nettoNet 6060 calendar days
2% Skonto / 10 Tage netto 302% disc. in 10, else Net 3030 days / 10 days for discount

Save this in your team workflow

Bookmark this page for your accounts team so you do not need to search again. Use the Copy result button to paste the Fälligkeitsdatum (due date) into your invoice, Lexware, DATEV, or CRM.

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