German E-Invoice Clock 2027 (Sec. 14 UStG) by ReadyStack

2027-01-01 or 2028-01-01, the go-live buffer you have left, and the 8-year archive year


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• The EUR 800,000 test, applied to your entity — Applies the prior-calendar-year turnover test in Sec. 14 UStG to decide whether your first mandatory issuing date is 2027-01-01 or 2028-01-01, and names the reason.
• Days of buffer between go-live and the mandate — Subtracts the date your XRechnung or ZUGFeRD issuing setup goes live from your binding date, so a late project shows as a negative number instead of a feeling.
• Days overdue on the receiving duty — Counts the days since 2025-01-01, when every domestic German business had to be able to receive a structured e-invoice, whatever its turnover.
• Invoices actually in scope per year — Removes the share of small invoices at or under EUR 250 from your annual German B2B volume, so the migration is sized on the invoices the mandate really touches.
• What a year of rejected PDFs costs — Multiplies in-scope invoices by your rework minutes and loaded hourly cost to price a year of correcting and re-issuing invoices a buyer refuses.
• The 8-year archive year — Applies the Sec. 147 AO retention period, shortened from ten to eight years on 2025-01-01, counting from the end of the year the invoice arose.

| You type | |
|---|---|
| Today (the clock counts from here) | default 2026-09-14 |
| How your German sales are invoiced | default German entity, standard VAT (GmbH, UG, AG, branch) |
| Total 2026 turnover of the German entity (prior-calendar-year test) | default 1400000 |
| Date your XRechnung / ZUGFeRD issuing setup goes live | default 2026-11-30 |
| Domestic German B2B invoices you issue per month | default 180 |
| Share of them at or under EUR 250 (still exempt) | default 12 |
| Minutes to correct and re-issue one rejected invoice | default 6 |
| Loaded hourly cost of the person who does it | default 48 |

| It answers | |
|---|---|
| First date you must issue a structured e-invoice | |
| Days left from today | days |
| Buffer between go-live and that date | days |
| Days since the receiving duty started (2025-01-01) | days |
| Invoices in scope per year | invoices |
| Cost of a year of rejected-invoice rework | EUR |
| Keep those e-invoices until (8 years, Sec. 147 AO) | |

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