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Applying to extend a German tax return deadline

Deadlines for filing German tax returns can be extended — and extended RETROSPECTIVELY, where it would be inequitable to let the consequences of the expired deadline stand (§ 109(1) AO). That is more than a convenience: the late-filing penalty that otherwise MUST be imposed without any discretion falls away where the tax authority has extended the deadline under § 109, or extends it retrospectively (§ 152(3) no. 1 AO). The statutory default is seven months after the end of the calendar year (§ 149(2) sentence 1 AO); where a member of the tax advisory professions has been instructed, the returns listed in § 149(3) AO are not due until the last day of February of the SECOND following calendar year.

Up to date for 2026 — verified on September 22, 2026Official procedure, no printed formGuide: about 15 min

This content is part of the path: Filing your income tax return· Step 11 of 12· Next step: German income tax return (ESt 1 A)

Deadlines

Default deadline: seven months after the end of the calendar year
§ 149(2) sentence 1 AO — save where the tax statutes provide otherwise
With a member of the tax advisory professions instructed: the last day of February of the second following calendar year
§ 149(3) AO, for the returns exhaustively listed there; in cases under § 149(2) sentence 2 AO, 31 July of the second following calendar year
Mandatory late-filing penalty: after 14 months
§ 152(2) no. 1 AO — 19 months in cases under § 149(2) sentence 2 AO (§ 152(2) no. 2 AO)
Before those limits: a penalty is possible but discretionary
§ 152(1) sentence 1 AO — and it must not be imposed where the person liable to file credibly shows the delay was excusable (sentence 2)

Documents to prepare

  • ELSTER access with a certificate or an ELSTER business account
  • Tax number, type of tax and tax period
  • The deadline that applies to you: the default one or the adviser deadline
  • The specific date you are asking to extend to
  • Factual grounds: missing records, illness, events causing delay
  • Where you go beyond the adviser deadline: a plea of absence of fault
See the procedure on the official site

No form is attached to this procedure: the link leads to the official page that describes it.

What this page gives you

The guide above and the link to the official site. ActioFin does not produce any document for this page: whatever you fill in or file is done on the official medium.

Who this applies to

  • Anyone filing their own return who cannot meet the default deadline of seven months after the end of the calendar year (§ 149(2) sentence 1 AO)
  • Anyone unable to meet a deadline SET by the tax authority: § 109(1) sentence 1 AO names both kinds of deadline side by side
  • Anyone who has already missed the deadline — it can be extended retrospectively, in particular where it would be inequitable to let the consequences stand (§ 109(1) sentence 2 AO)
  • Anyone who has instructed a tax adviser and needs time BEYOND that extended deadline: § 109(2) AO then applies, and the extension requires that the taxpayer is or was prevented without fault
  • Farmers and foresters with a financial year differing from the calendar year: the deadline does not end before the seventh month following the close of the financial year begun in that calendar year (§ 149(2) sentence 2 AO), and 31 July replaces the February date (§ 109(2) sentence 2 AO)

Worked example

Tobias Renner, a sole trader with no tax adviser, cannot file his 2025 return on time

His 2025 income tax return is due at the latest seven months after the end of the calendar year (§ 149(2) sentence 1 AO), that is by 31 July 2026. In July two folders of records are still missing. He applies through ELSTER for an extension to the end of October — deadlines for filing tax returns may be extended (§ 109(1) sentence 1 AO), and because he has not yet let the deadline lapse he does not even need the inequity argument in sentence 2. Had he done nothing and filed only in December 2026, he would be in the territory of § 152(1) AO: a late-filing penalty MAY then be imposed, and it must not be imposed where he credibly shows the delay was excusable (§ 152(1) sentence 2 AO) — with the fault of a representative or agent attributed to him. Had he waited beyond February 2027, that is more than 14 months after the end of the calendar year, a penalty WOULD have to be imposed (§ 152(2) no. 1 AO): no discretion left. It amounts, for each part month of delay, to 0.25 per cent of the assessed tax reduced by the assessed instalments and creditable withholdings, but at least 25 euros per part month (§ 152(5) sentence 2 AO). That is exactly what the application prevents: subsection 2 does not apply where the tax authority has extended the deadline under § 109 or extends it retrospectively (§ 152(3) no. 1 AO).

How to fill it in, step by step

  1. Establish first WHICH deadline applies to you: the default of seven months (§ 149(2) sentence 1 AO) or the adviser deadline to the end of February of the second following year (§ 149(3) AO).
  2. Check whether you are still within it: a running deadline is extended under § 109(1) sentence 1 AO, an expired one only retrospectively under sentence 2, and that requires the consequences to be inequitable.
  3. Log in to Mein ELSTER and select the application for an extension of time (Antrag auf Fristverlängerung).
  4. State the type of tax, the tax period and the specific date you are asking to extend to — an application without a target date cannot be decided.
  5. Give factual grounds: missing records, illness, an event delaying preparation.
  6. If you are asking to go beyond the adviser deadline in § 149(3) AO, assert expressly that you are or were prevented WITHOUT FAULT — § 109(2) AO requires it, and a representative's fault is attributed to you.
  7. Expect the extension to be made subject to an ancillary provision or to security (§ 109(3) AO).
  8. Keep the decision granting the extension: it is the evidence that the mandatory late-filing penalty under § 152(3) no. 1 AO does not bite.

Good to know

  • Retrospective extension is the strongest provision in this application: where such deadlines have already expired they can be extended retrospectively, in particular where it would be inequitable to let the consequences stand (§ 109(1) sentence 2 AO).
  • The link to the late-filing penalty is written into the statute, not merely administrative practice: § 152(3) no. 1 AO excepts cases of extension under § 109 from the mandatory penalty.
  • The extension may be made subject to an ancillary provision and in particular conditional on security (§ 109(3) AO).
  • It may be granted on a purely automated basis where a risk management system under § 88(5) AO is used and there is no occasion for an official to handle the case (§ 109(4) AO) — a quick answer is therefore not a sign of carelessness.
  • The mandatory penalty also falls away where the tax is assessed at zero or a negative amount, or where the assessed tax does not exceed the sum of the assessed instalments and creditable withholdings (§ 152(3) nos. 2 and 3 AO).
  • It likewise does not apply to annual wage tax returns or to declarations of VAT special advance payments under § 48(2) UStDV (§ 152(3) no. 4 AO) — the annual special advance payment under a permanent extension therefore never triggers it.
  • For returns assessing the trade tax base amount the penalty is a flat 25 euros for each part month of delay (§ 152(6) sentence 2 AO).
  • The obligation to file survives even where the tax authority has already estimated the tax base (§ 149(1) sentence 4 AO). An estimate does not dispose of the return.

Common mistakes

  • Claiming the adviser deadline without having instructed an adviser. § 149(3) AO ties it to persons within §§ 3 and 4 to 4d of the Tax Advisory Act having been INSTRUCTED to prepare the return.
  • Asking to extend beyond the adviser deadline without pleading absence of fault. § 109(2) AO allows extension for periods after the last day of February of the second following year only where the taxpayer is or was prevented without fault.
  • Assuming the adviser's fault does not count. The fault of a representative or agent is attributed to the taxpayer (§ 109(2) sentence 3 AO, and likewise § 152(1) sentence 2 AO).
  • Giving up once the deadline has passed. It can be extended RETROSPECTIVELY (§ 109(1) sentence 2 AO), and the mandatory late-filing penalty falls with it (§ 152(3) no. 1 AO).
  • Applying without a target date. What is extended is a deadline to a point in time; without one there is nothing to decide.
  • Confusing the filing deadline with the threshold for the mandatory penalty. The return is due after seven months (§ 149(2) sentence 1 AO); the penalty only becomes mandatory after 14 months (§ 152(2) no. 1 AO) — in between, the discretion in § 152(1) AO governs.
  • Mistaking this for an extension of time to PAY. It concerns FILING the return; for payment there is the deferral, and for VAT preliminary returns the permanent extension.

Frequently asked questions

By when must I file my tax return?

Save where the tax statutes provide otherwise, returns relating to a calendar year must be filed at the latest seven months after the end of that calendar year (§ 149(2) sentence 1 AO). Where a member of the tax advisory professions has been instructed to prepare them, the returns listed in § 149(3) AO are not due until the last day of February of the second calendar year following the tax period.

Can I still get an extension once the deadline has passed?

Yes. Where such deadlines have already expired they may be extended retrospectively, in particular where it would be inequitable to let the legal consequences of the expiry stand (§ 109(1) sentence 2 AO).

What does the extension actually get me?

It removes the mandatory late-filing penalty. Under § 152(2) AO a penalty MUST be imposed where an annual return has not been filed within 14 months; under § 152(3) no. 1 AO that does not apply where the tax authority has extended the deadline under § 109 or extends it retrospectively.

How large would the late-filing penalty be?

For returns relating to a calendar year or to a statutorily fixed point in time it is, for each part month of delay, 0.25 per cent of the assessed tax reduced by the assessed instalments and the creditable withholdings, but at least 25 euros for each part month (§ 152(5) sentence 2 AO).

I have a tax adviser and still need longer — is that possible?

Only on an additional condition. For periods after the last day of February of the second calendar year following the tax period, § 109(1) AO applies only where the taxpayer is or was prevented without fault from meeting the filing deadline; the fault of a representative or agent is attributed to the taxpayer (§ 109(2) AO).

Can the tax office attach conditions to the extension?

Yes. The tax authority may attach an ancillary provision to the extension and in particular make it conditional on the provision of security (§ 109(3) AO).

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Guide and document provided for information purposes only; they do not constitute personalised legal or tax advice. Check the recipient organisation's requirements and consult a professional if needed.