Betriebsprüfung 2026: Die neue Außenprüfungsordnung

The tax audit (Betriebsprüfung) is getting a new rulebook: on July 10, 2026, the Bundesrat approved the new audit regulations (Außenprüfungsordnung, ApO). They replace the tax audit regulations (Betriebsprüfungsordnung) of March 15, 2000, and take effect on the day after publication in the Federal Tax Gazette (Bundessteuerblatt). For you as an entrepreneur, that means: audits are meant to arrive sooner and be wrapped up faster, case selection is risk-oriented – and since 2025, cooperating too slowly can trigger a cooperation delay penalty (Mitwirkungsverzögerungsgeld) of 75 euros per day. Here you'll learn what's changing and how to prepare.

What are the Außenprüfungsordnung – and why now?

The Außenprüfungsordnung is not a change in legislation but a general administrative directive (allgemeine Verwaltungsvorschrift). It governs how the tax administration organizes and conducts external audits (Außenprüfungen): the criteria by which cases are selected, how audits of affiliated companies proceed, how the state tax authorities and the Federal Central Tax Office (Bundeszentralamt für Steuern) work together. So for you it isn't a law that applies directly, but it is a fairly reliable look into your auditor's working instructions.

The trigger is the DAC 7 Implementation Act of December 20, 2022 (DAC-7-Umsetzungsgesetz). It modernized tax procedural law and amended numerous provisions of the Fiscal Code (Abgabenordnung). The old Betriebsprüfungsordnung from 2000 simply no longer fit. The Federal Ministry of Finance published the draft on March 23, 2026, and comments were possible until April 17, 2026. The Bundesrat approved it on July 10, 2026, without substantial changes to the draft.

The name itself is a signal, too: "Betriebsprüfungsordnung" becomes "Außenprüfungsordnung" because the directive applies to all external audits within the meaning of the Abgabenordnung – not only to the classic commercial tax audit, but also, for example, to special wage tax and VAT audits.

The three most important changes

1. Case selection is risk-oriented

The ApO stipulate that audit cases should generally be selected on a risk-oriented basis. When setting audit priorities, risk assessment procedures – including international ones – must also be taken into account. Translated: unusual key figures, industry comparisons, and machine-detectable inconsistencies drive the selection more strongly than before. For clean bookkeeping with plausible documentation, that's rather good news.

2. The prompt tax audit becomes the standard case

Until now it was normal for an audit to cover periods years in the past. The ApO present the prompt tax audit (zeitnahe Betriebsprüfung) as the standard case. Together with the earlier start of audits under § 197 Abs. 5 AO, this points toward audits taking place considerably closer to the year being audited.

This has a practical side effect that's easy to underestimate: if what was only just recorded is being audited, your records have to be complete now – not at some point when the audit is announced. The classic buffer of two to three years, during which gaps could still be quietly closed, disappears.

3. The suspension of the limitation period is capped at five years

A core element of the reform: under § 171 Abs. 4 Satz 3 AO, the suspension of the limitation period (Ablaufhemmung) in an external audit is capped at five years. Previously, a stalled audit could push back the assessment limitation period practically without limit. That's no longer possible – which puts the tax administration itself under time pressure.

The catch: the qualified request for cooperation under § 200a AO

Because the suspension of the limitation period is capped, the legislator needed an instrument to prevent taxpayers from simply waiting out the audit. That instrument has been in force since January 1, 2025: the qualified request for cooperation (qualifiziertes Mitwirkungsverlangen) under § 200a AO. Anyone who wants to know how seriously the acceleration is meant should take a close look at this provision.

Here's how it works:

• Six months' lead time. Only after six months have passed since notification of the audit order (Prüfungsanordnung) can the tax office issue a qualified request for cooperation (§ 200a Abs. 1 Satz 1 AO). Within those six months, "simple" requests for cooperation are usually issued already.
• It is an administrative act. Unlike an informal request from the auditor, the qualified request for cooperation is formal – and therefore contestable, but also binding.
• A one-month deadline. If you fail to comply with the request within one month, or comply insufficiently, a cooperation delay penalty must be imposed (§ 200a Abs. 2 Satz 1 AO). The tax office has no discretion here.
• 75 euros per day. The Mitwirkungsverzögerungsgeld amounts to 75 euros for every full calendar day of delay, for a maximum of 150 days. The maximum amount is therefore 11,250 euros.
• Surcharge for repeat cases. In cases of repeated cooperation delay, or where there is reason to fear that a taxpayer would not cooperate without a surcharge because of their economic capacity, an additional surcharge may be imposed (§ 200a Abs. 3 AO) – at the authority's discretion, up to 25,000 euros per day, likewise for a maximum of 150 days.

From when does § 200a AO apply to you?

In principle, the provision applies for the first time to the audit of taxes arising after December 31, 2024 (Art. 97 § 37 Abs. 2 Satz 1 EGAO). But it also applies to earlier years if the audit order was notified after December 31, 2024 (Art. 97 § 37 Abs. 3 Satz 1 EGAO). So anyone who receives an audit order in 2026 for 2020 through 2023 falls within its scope.

Careful when seeking legal remedies

One detail that is discussed critically in the specialist literature: if the taxpayer challenges measures under § 200a AO by objection (Einspruch) or court action, the assessment limitation period for the audited taxes does not end before one year has passed since the decision became final (§ 200a Abs. 5 AO). This effect occurs even if the measure later turns out to have been unlawful. A legal remedy against the request for cooperation can therefore effectively extend the limitation period – here it's always worth coordinating with your tax advisor.

The best protection: agree on a framework

There is a very practical way out that many people don't know about. Under § 199 Abs. 2 Satz 3 AO, no qualified request for cooperation may be imposed if the taxpayer and the tax authority have agreed on a framework for cooperation (Rahmenbedingungen für die Mitwirkung) during the external audit and the taxpayer complies with it.

Such arrangements already existed in suitable individual cases in the past. Now they have an explicit legal basis. If you clarify at the start of an audit which records will be delivered in what form and within what time frame, you take away the basis for the sanction instrument. That's the strongest lever you have – and it costs no more than one conversation at the beginning of the audit.

How to prepare in practical terms

An audit that arrives earlier and is supposed to run faster is won or lost in the preparation. These are the points where things go wrong most often in practice:

1. Digital receipts have to be findable. Not "available somewhere," but assignable by document, date, and entry. A receipt archive attached directly to the accounting entry saves days during an audit.
2. Process documentation under GoBD. It describes how receipts get into your system and how they are processed and archived. It's almost always missing in small businesses and is one of the first things asked about.
3. Keep cash records clean. With cash transactions, that includes TSE logs, cash reports, and the registration of the electronic till under § 146a AO.
4. Prepare data access. The tax administration may demand tax-relevant data in machine-readable form. Clarify in advance with your bookkeeping which reports your system can produce.
5. Appoint a single contact person. When queries bounce back and forth between management, bookkeeping, and the tax advisor, you get exactly the kind of delays that § 200a AO makes expensive.

Tip: Don't wait for the audit order to start tidying up. If prompt audits become the standard case, the best time to prepare is the current month – not the moment the letter from the tax office arrives.

Audit-proof bookkeeping – without you having to deal with it

Audit readiness isn't created shortly before the audit; it comes from bookkeeping that is kept up to date and is easy to follow. That's exactly what we do at Buchführungsheld: real bookkeepers record your receipts every month, archived digitally and in line with GoBD, at a fixed price. If questions come up later, everything is where it belongs. Want to know how well your business currently stands? Book a free preliminary consultation, and we'll look at your situation together.

Frequently asked questions

What are the Außenprüfungsordnung (ApO)?

The ApO are the federal government's new general administrative directive for external audits. The Bundesrat approved them on July 10, 2026. They replace the Betriebsprüfungsordnung (BpO) of March 15, 2000, and take effect on the day after publication in the Federal Tax Gazette. The BpO ceases to be in force at the end of the day of publication.

How high is the cooperation delay penalty?

It amounts to 75 euros for every full calendar day of cooperation delay and may be imposed for a maximum of 150 days. The maximum amount is therefore 11,250 euros. In repeat cases, an additional surcharge of up to 25,000 euros per day may be imposed (§ 200a Abs. 3 AO).

Can I avoid the qualified request for cooperation?

Yes. Under § 199 Abs. 2 Satz 3 AO, no qualified request for cooperation may be imposed if you have agreed a framework for cooperation with the tax office and you also comply with it. So it's worth discussing such a framework right at the start of the audit.

Will tax audits now happen more often?

The ApO say nothing about the number of audits, only about how they are organized. However, they do stipulate that case selection is risk-oriented and that prompt audits should become the standard case. So above all, you should expect audits to take place closer to the year being audited and to be concluded more quickly.