Closed your business in Germany? Why the official post keeps coming

Does the post stop when you deregister?

You have deregistered your trade (Gewerbeabmeldung), handed back your trade licence and thought: finally, some peace. Then the letters arrive: from the tax office (Finanzamt), from the chamber of industry and commerce (IHK), from the statutory accident insurance institution (Berufsgenossenschaft). Weeks, months, sometimes years after you deregistered.

Many businesses close every year: according to the Federal Statistical Office (Destatis), there were around 602,700 trade deregistrations in Germany in 2023. What few people know: your tax obligations do not end when you deregister. In many cases they continue for ten years or longer.

Why does post still arrive after deregistration?

1. Can the tax office still audit you?

The tax office has the right to carry out a tax audit (Betriebsprüfung) even after you have given up your business. Under § 169 AO, the assessment period (Festsetzungsfrist) is usually 4 years, 5 years where tax was understated through recklessness, and as much as 10 years in cases of tax evasion.

In practice, this means: you deregister your business in 2026, and in 2030 an audit order (Prüfungsanordnung) lands in your letterbox. The tax office then examines past tax years, and if something is wrong, it asks for back payments, plus interest.

2. How long do retention duties under § 147 AO last?

The retention periods show how long your old business stays relevant for the tax office, and why many former business owners still receive post years later:

The period starts at the end of the calendar year in which the last entry was made, the letter was received or sent, or the voucher was created (§ 147 (4) AO). If you deregister your business in March 2026, the 10-year periods only end at the end of 2036. In addition, a period does not end as long as the documents still matter for a tax whose assessment period has not yet expired (§ 147 (3) AO).

3. Can your VAT still be checked?

Even after you deregister, the tax office can still examine your VAT (Umsatzsteuer). While business premises are still in use, it can even carry out an unannounced VAT inspection (Umsatzsteuer-Nachschau, § 27b UStG); after the business has closed, it can be examined as part of an audit. If errors come to light, such as incorrect input tax deductions or sales that were not reported, you face back payments with interest.

Interest on back taxes (§ 233a AO) is 0.15% per month (§ 238 (1a) AO), or 1.8% a year. This rate applies to interest periods from 1 January 2019; a 2022 law set it, replacing the previous 0.5% per month. If a back payment of €10,000 bears interest for 36 months, that comes to €540 in interest (€10,000 × 0.15% × 36).

4. Trade tax apportionment and IHK contributions

The IHK charges contributions based on the trade tax base amount (Gewerbesteuermessbetrag), and that amount is often only finally set months after deregistration. The apportionment of trade tax (Gewerbesteuer-Zerlegung), where you had premises in several municipalities, can also lead to back payments.

5. Social security and the Berufsgenossenschaft

The Berufsgenossenschaft (BG) still asks for the final contribution for the current year after you deregister. And if you had employees, the social security institutions may still claim contributions, usually up to four years after the end of the year in which they fell due, and up to 30 years for contributions withheld on purpose (§ 25 (1) SGB IV).

Where should the post go?

It becomes especially critical if you move abroad after deregistering. The authorities keep sending post to your last known address in Germany. And the deemed delivery rule (Zugangsfiktion) applies:

• A letter from the tax office posted to an address in Germany counts as delivered on the fourth day after posting, a letter sent abroad one month after posting, unless it arrives later or not at all (§ 122 (2) AO)
• Deadlines run without you knowing
• Notices become final, and back payments can be enforced

A forwarding order with Deutsche Post (Nachsendeauftrag) only runs for a limited time. After that, letters go back to the sender. The matters behind them do not stop: the tax office carries on, and you hear nothing about it.

How deadlines are counted: our guide to German tax deadlines and deemed delivery.

What should you do?

Straight after deregistering:

1. Tell the tax office your new address, or name an authorised recipient (Empfangsbevollmächtigter)
2. Keep all records safe: invoices, contracts, bank statements, for the statutory periods of up to 10 years
3. File your final tax returns: income tax, VAT and trade tax for the year of deregistration
4. Inform your tax adviser: a tax adviser can still be useful after deregistration

If you move abroad:

1. Set up PortoDoc as your authorised recipient, so that your official post reaches you
2. Give the tax office your PortoDoc address as your new delivery address: you name PortoDoc to the tax office yourself, and your online account shows under "For the tax office" what to enter
3. Inform all authorities: IHK, Berufsgenossenschaft, trade office (Gewerbeamt)

How does PortoDoc help in the years after?

PortoDoc receives your post, even if you closed your business years ago. You get your postal address in Ahrensburg near Hamburg with your personal PD number. It is a delivery address for letters, not a business, registered-office or imprint address.

We scan each letter and it then appears in your online account.

Especially useful for former business owners:

• Audit orders and notices get an AI-based, non-binding urgency level: red = urgent, yellow = action needed, green = for information
• AI deadline hint from the Business plan: it marks possible deadlines in notices and payment demands: a non-binding aid. The letter itself is what counts, and you (or your tax adviser) check every deadline yourself.
• Letters from the IHK and the BG arrive in your online account like every other letter, with an e-mail notification when a new letter arrives. Originals are kept safely for 90 days after scanning and then destroyed; if you need one, we forward it to you: €4.90 within Germany, €7.90 abroad (letters up to 20 g), postage included.
• A clear record: all letters received are stored in your online account and are searchable

Your post still arrives at a fixed address years later. PortoDoc receives and scans it for you, and you can read it from anywhere.

Conclusion

Deregistering your business is not the end of official post. Often it is only the start of a long follow-up phase. Retention periods of up to 10 years, possible tax audits and back payments make a dependable postal address essential.

Especially if you move abroad, PortoDoc is your fixed postal address: your letters reach your online account, wherever you are. Checking deadlines and responding in time remains your task, or your tax adviser's.