German Tax Assessment Appeal 2026: Filing an Einspruch as a GmbH or Self-Employed

If you're self-employed or run a GmbH in Germany, never file the tax assessment letter (Steuerbescheid) without reading it. The Finanzamt makes mistakes — and you have exactly one month to challenge it before the assessment becomes final.

What is an Einspruch and when is it worth filing?

An Einspruch (§ 347 AO) is the free, out-of-court appeal against a tax assessment. It's worth filing when:

• The Finanzamt rejected business expenses you can document
• Input VAT was denied even though the invoice meets all formal requirements
• Estimated assessments are too high because a return wasn't filed
• Loss carryforwards weren't taken into account
• You spot a mistake in your own tax return

The number that matters: one-month deadline

The objection deadline is one month from the date the assessment is officially served. By postal delivery, the assessment is deemed served on the third day after dispatch (§ 122 (2) AO). If the third day falls on a Saturday, Sunday, or holiday, the next business day applies.

Example: assessment dated May 15. Service date = May 18. Deadline ends June 18 at midnight. A late objection is dismissed — the assessment becomes final and can only be changed in exceptional cases.

How to file an objection — step by step

1. Form: in writing — by ELSTER, letter, fax, or email to the Finanzamt that issued the assessment. No lawyer required.
2. Content: “I hereby file an objection (Einspruch) against the assessment dated [date], tax number […].” The justification can be added later.
3. Justification: identify the disputed item and attach supporting documents if available.
4. Confirmation: the Finanzamt sends an acknowledgment of receipt.

Important: while the objection is pending, you still have to pay the disputed tax — unless you also apply for suspension of enforcement (Aussetzung der Vollziehung).

Apply for suspension of enforcement (AdV)

Together with the objection, you can request suspension of enforcement (§ 361 AO). The Finanzamt then puts the payment on hold until the objection is decided — you only pay the disputed tax if the objection is ultimately rejected.

AdV is granted when there are serious doubts about the legality of the assessment, or when immediate payment would cause undue hardship. Watch out: if the objection is dismissed, suspension interest of 0.5% per month (6% per year) applies — more expensive than most bank loans.

Common mistakes in tax assessments

• Missing receipts: business expenses denied because the original was required and you only submitted a scan.
• Prepayments not credited: paid tax prepayments weren't applied.
• Estimated assessment: if you didn't file a return, the Finanzamt issues an estimate with high assumptions. An objection plus the missing return usually fixes it.
• Wrong loss carryforward: prior-year losses weren't carried forward.
• Double taxation: foreign income or reverse-charge amounts handled incorrectly.

Lawsuit at the tax court — when does it make sense?

If your objection is rejected by an objection decision (Einspruchsentscheidung), the next step is a lawsuit at the tax court (Finanzgericht) — within one month of the decision being served. Court fees start around €300, and proceedings often take 1–3 years. Worth pursuing for larger disputed amounts or fundamental legal questions — for example after a tax audit with substantial back-taxes, where hiring a tax lawyer usually pays off.

How to avoid disputes with the Finanzamt

Most objections are filed because the original return had gaps or missing documentation. With clean, AI-supported bookkeeping that rarely happens. Norman assigns each receipt to the correct account automatically, sanity-checks the VAT return, and files GmbH taxes and self-employed taxes directly through ELSTER.

Filing it right the first time means fewer wrong assessments — and when one does come, every receipt is already digitally sorted.

Bottom line

A tax assessment is not a verdict — it's a proposal from the Finanzamt. You have exactly one month to review it, and a simple Einspruch keeps every option open. Most important rule: write the deadline in your calendar the moment the assessment arrives, and never file it away unread.