German Fiscal Code (AO)

German Fiscal Code (AO) - The German Fiscal Code is the fundamental procedural law of German tax law. It governs the general principles of taxation, the procedure for assessing taxes, the rights and obligations of taxpayers, and the regulations governing tax collection and enforcement. The AO is relevant to property owners because it sets forth the deadlines and procedures for property tax, real estate transfer tax, income tax, and inheritance tax.

Significance for Property Owners

The AO specifies the deadlines for filing tax returns, how tax assessment notices are issued and challenged, and under what conditions the tax office must collect back taxes or issue refunds. For landlords who report income from renting and leasing, the AO defines the statute of limitations for assessment (generally four years, ten years in cases of tax evasion) and the rules for amending final tax assessments.

With regard to real estate transfer tax, the AO stipulates that the tax becomes due within one month of the tax assessment notice being issued. The tax office’s certificate of no objection-a prerequisite for the transfer of ownership in the land register-is issued only after payment of the real estate transfer tax.

Important AO Provisions for Real Estate Transactions

When buying and selling real estate, the AO addresses several practical aspects:

Reporting Requirements: Under § 18 of the Real Estate Transfer Tax Act (GrEStG) in conjunction with the AO, notaries are required to report real estate purchase agreements to the tax office. This is done automatically by sending a certified copy of the contract. The taxpayer themselves also has reporting obligations in certain cases-such as when a property is gifted.

Retention obligations: Landlords are subject to retention obligations for tax-relevant documents under § 147 AO. Accounting records, lease agreements, receipts for income-related expenses, and operating cost statements must be retained for ten years. Only business correspondence is subject to a six-year retention requirement. Failure to comply may result in estimates during a tax audit or external tax examination, which are typically borne by the taxpayer.

Field Audit: Under § 193 AO, the tax office may review a taxpayer’s tax affairs through a field audit. Landlords of larger portfolios or business operators are more frequently affected by this. In such audits, all rental income, income-related expenses, and depreciation are examined.

Objection and Appeal Procedures

The AO regulates the objection procedure as an extrajudicial remedy in §§ 347 ff. An objection may be filed with the competent tax office within one month of receiving any tax assessment. During the objection procedure, enforcement of the assessment is not automatically suspended-the taxpayer must submit a separate application for a stay of enforcement.

If the objection is rejected, the next step is to file a lawsuit with the tax court (Section 40 of the Tax Court Act (FGO)). In Bavaria, the Munich Tax Court has jurisdiction. Appeals against tax court rulings may be filed with the Federal Fiscal Court (BFH).

AO Deadlines at a Glance

Deadline	Duration	Description
Appeal deadline	1 month	From the date of notification of the tax assessment
Statute of limitations for assessment	4 years	Standard period from the filing of the return
Statute of limitations for assessment (negligence)	5 years	In cases of negligent tax evasion
Statute of limitations for assessment (fraud)	10 years	In cases of intentional tax evasion
Retention requirement for accounting records	10 years	Receipts, lease agreements, statements
Retention requirement for business correspondence	6 years	Correspondence, contract offers

Practical tip for Nuremberg and the metropolitan region

We recommend that property owners carefully review tax assessment notices-especially property tax and real estate transfer tax notices-within the one-month appeal period. Erroneous notices can only be contested within this period. Following the 2025 property tax reform, many owners in Nuremberg and Franconia have received new property tax assessment notices, against which an appeal should be filed in a timely manner if the basis for valuation appears to be incorrect.

For complex tax matters such as real estate gifts, the allocation of purchase prices between building and land components, or the question of whether a rental business qualifies as a commercial enterprise, we recommend consulting a tax advisor specializing in real estate tax law. In the Nuremberg-Fürth-Erlangen region, there are numerous specialized tax advisory firms that provide expert advice to landlords and investors. The Nuremberg Chamber of Tax Advisors maintains a search database of tax advisors organized by areas of practice.

Frequently Asked Questions

How long can the tax office claim back taxes?

The standard statute of limitations for tax assessments is four years from the end of the calendar year in which the tax return was filed. If no tax return was filed, the statute of limitations does not begin to run until three years have passed. In cases of negligent tax evasion, the period is extended to five years; in cases of intentional tax evasion, it is extended to ten years. This means that, in the worst-case scenario, the tax office can retroactively demand payment for undeclared rental income for up to ten years.

What happens if I don’t pay the real estate transfer tax on time?

If the real estate transfer tax is not paid by the due date, the tax office will impose late payment penalties of 1 percent per month or part thereof of the delay on the amount in arrears. In addition, the clearance certificate will not be issued, meaning the transfer of ownership in the land registry is blocked. Since buyers typically link the payment of the purchase price to the transfer of ownership, a delay in paying the real estate transfer tax can bring the entire purchase process to a standstill. In Bavaria, the real estate transfer tax rate is currently 3.5 percent.

Can I file an appeal against a tax assessment?

Yes, an appeal may be filed with the competent tax office against any tax assessment within one month of its notification. The appeal must be substantiated in writing; an informal email or a handwritten letter referencing the assessment is sufficient for formal purposes, and a substantive justification may be submitted later. During the appeal process, the obligation to pay generally remains in effect; however, a stay of enforcement may be requested under Section 361 of the German Fiscal Code (AO), which avoids a provisional payment.

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