The renovation of a rental apartment is not only a matter of aesthetics or tenant comfort. In the background, the key question always arises – whether the expense can be deducted immediately or whether it must be recognized over many years. In the German tax system, that line is surprisingly thin and easy to cross. A poorly planned scope of work is enough for a quick tax benefit to turn into depreciation. Therefore, before starting a renovation, it is worth knowing what really determines the treatment of costs and how costly mistakes can be avoided.
Renovation of a rented apartment – recognize as expenses or depreciate over time?
At first glance, everything seems simple – the renovation is paid for and the aim is to deduct it as quickly as possible. In practice, however, whether the expense is recognized as a one-off deduction or depreciated over many years depends on how the tax office classifies the activities. The key distinction concerns the difference between deductible maintenance expenses and expenses treated as an investment. If the work is intended to restore the property to its original technical condition, immediate recognition as business-related expenses is possible. This means a real tax benefit already in the current return, without having to spread the expense over many years.
The problem begins when the scope of work goes beyond ordinary refreshing. It is enough for the renovation to raise the standard of the property or introduce new elements, and the tax authorities may classify it as an investment. In that case, one-off deduction is no longer possible – the costs are capitalized and recognized gradually through depreciation. Importantly, the amount of the expense itself does not determine the classification, so even an expensive renovation may still be a current expense if it does not change the standard. That is why, before work begins, the renovation should be viewed not only technically but also from a tax perspective – because the difference in approach may mean waiting several years for relief instead of receiving an immediate tax benefit.
Repairing or improving? This detail decides whether the renovation can be deducted immediately
In practice, the most important question is: is something being repaired, or is something new being created? That nuance determines how the expense will be treated. If worn-out components are replaced with new ones – even technologically better ones – but they still serve the same function, this constitutes deductible maintenance expenses. This applies, for example, where costs related to replacing windows or modernizing an installation merely restore the building’s functionality. In such cases, the expense can be recognized in the year in which it is incurred, which for many owners means a clear improvement in cash flow.
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The situation is completely different when the work leads to a real increase in the value or functionality of the premises. If, for example, the layout of rooms is changed, new installations are added, or the standard of equipment is significantly raised, the tax authorities will treat this as an improvement. Importantly, even if individual measures seem minor, their combination into one larger modernization project may change the classification of the whole. That is precisely why problems arise so often – the taxpayer sees several repairs, while the tax office sees one investment. It is therefore advisable to assess the renovation as a whole and in advance determine whether the line between maintenance and improvement is being crossed.
If a larger renovation is planned, take photos of the apartment before the contractors arrive and ask the contractor not to simply write “apartment renovation” on the invoice. The more precisely the items are separated – for example, repair of the installation, replacement of worn windows, painting, or construction of a new element – the easier it is later to demonstrate to the Finanzamt what was ordinary maintenance expense and what was a genuine modernization. In the case of a larger investment, a few photos and a properly described invoice can be worth more than a long dispute with the tax office several years later.
15% over 3 years – the threshold that changes everything. Has the renovation already exceeded it?
One of the most problematic provisions is the rule relating to 15% of the building’s value (excluding land) within 3 years of purchase. If renovation expenses exceed this threshold, even standard work may be treated as an investment. In practice, this means that costs that would normally be deductible in one lump sum suddenly fall under depreciation and are recognized over many years. This is especially important for intensive work carried out after purchasing a rental apartment – because that is when the threshold is most easily exceeded unintentionally.
Importantly, this value includes various measures, including costs related to replacing the heating system or larger modernization works. It does not matter whether the renovation was necessary – what counts is the total amount of the expenses and the timing of the work. It should also be remembered that exceeding the threshold may have retroactive effect, which means that earlier returns may need to be corrected. For that reason, monitoring the renovation budget in the first years after acquiring a property is not only a financial issue but also a matter of tax security. Sometimes spreading the work over time brings more benefits than completing the renovation quickly.
Rental renovation step by step – when a tax benefit is obtained and when the expense is subject to depreciation
Planning a rental renovation should begin not with the choice of materials, but with a tax analysis of the entire project. If the focus is on restorative work – that is, work that returns the premises to a usable condition – immediate deduction may be available. In practice, this includes, among other things, costs related to replacing a stove, repairing installations, or refreshing surfaces. It is precisely such measures that most often qualify as business-related expenses, providing a real tax benefit already in the current tax year.
The situation changes when the renovation becomes part of a broader strategy to raise the standard. If the measures are interconnected and form a single whole, the tax authorities may classify them as an investment, even if individually they would appear to be ordinary repairs. In that case, depreciation applies, meaning recognition of the costs over time, which significantly delays recovery of the funds. That is why it is so important to analyze each stage of the renovation separately and consciously decide whether the aim is speed or tax efficiency. In many cases, small changes to the work schedule can translate into concrete financial benefits.
In practice, depreciation of a residential rental property most often amounts to 2% per year for buildings completed after 1924 and 2.5% per year for buildings completed before 1925. For residential buildings completed after 31 December 2022, current rules provide for a rate of 3% per year, which is why expenses treated as investment costs are recognized gradually rather than in one lump sum.
New bathroom, installation, windows… current expense or investment? How to distinguish them?
The line between expense and investment most often becomes blurred in larger modernization projects. The mere replacement of components – even if expensive – does not yet mean an investment. If the work is limited to restoring functionality, for example includes costs related to replacing windows or installations, it may still be treated as current expense. The key issue is whether the premises after renovation work the same as before or acquire a new quality. That difference determines whether the item is deductible maintenance expense or an investment expense.
In practice, the problem arises when modernization covers several areas at once. If the standard is improved in a number of key installations, for example during the renovation of the bathroom, heating system and electrical system, the entire scope of work may be classified as an improvement. Even if part of the work had a repair character, the final result – namely the increase in standard – may determine the classification. That is why the renovation should be viewed not through the prism of individual invoices, but as a whole project. This approach helps avoid surprises at the time of filing and allows taxes to be managed consciously.
FAQ
Which renovation costs for a rented apartment can be deducted from tax in Germany?
As a rule, expenses that serve to maintain or restore the property’s previous condition, the so-called Erhaltungsaufwendungen, can be deducted once. This may include painting, repairing installations, replacing worn floors, windows or sanitary fixtures. If the work creates something new, expands the property, or significantly raises its standard, the cost may be subject to depreciation instead of one-off deduction.
How is the 15% renovation cost threshold calculated?
During the first three years after acquiring the property, the covered renovation and modernization expenses are added up before VAT. If they exceed 15% of the acquisition costs of the building itself, excluding the value of the land, they may be treated as anschaffungsnahe Herstellungskosten and cannot be deducted in one lump sum.
From what date is the 3-year period under the 15% rule calculated?
The three-year period is calculated to the day from the transfer of economic ownership of the property, i.e. in principle from the moment possession, benefits, burdens and risk related to the property are transferred. This does not have to be the date of signing the notarial deed or the beginning of the tax year.
What happens once the 15% threshold is exceeded?
Once the threshold is exceeded, the renovation expenses covered by it are treated as costs similar to production costs and increase the depreciation base of the building. This means that instead of deducting them in full in one year, they are recognized gradually through AfA. If the threshold is exceeded only in the second or third year, a correction of earlier tax returns may be required.
Which expenses are included in the 15% threshold and which are excluded from it?
The threshold may include, among other things, renovations, modernizations, removal of defects already existing at the time of purchase, and even cosmetic work such as painting or wallpapering. It does not include typical, regularly recurring maintenance work, for example ongoing heating servicing, nor certain repairs of damage that arose only after the purchase as a result of the actions of a third party or a force majeure event.
Can every renovation be deducted in one lump sum after 3 years?
No. After three years, the special 15% rule no longer applies, but it remains necessary to distinguish ordinary maintenance costs from investment costs. An extension of the building, a change in its function, or a significant increase in standard may still mean that the expense must be treated through depreciation.
Can renovation of an apartment before the first letting be deducted?
Yes, expenses incurred before the first rental income is received may be treated as vorweggenommene Werbungskosten if a clear connection between the renovation and the planned letting can be demonstrated. It is therefore advisable to retain, for example, advertisements, correspondence with the agent, or other evidence confirming the actual intention to rent out the apartment. A mere declaration of intent may not be sufficient.
Does spreading renovation work over several years prevent the expenses from being treated as an investment?
Not always. If the successive works are elements of a single planned modernization program and together lead to a significant increase in the building’s standard, the Finanzamt may treat them as one whole, even if they were carried out in different years. According to the current guidelines, the three-year period is of particular significance when assessing such a “step-by-step renovation.”
Can larger renovation costs be spread over several years?
Yes. Larger Erhaltungsaufwendungen relating to real estate belonging to private assets and used mainly for residential purposes may be spread evenly over 2 to 5 years under § 82b EStDV. This may be advantageous where a one-time deduction of the entire renovation cost in a single year does not produce the optimal tax effect.
How should renovation of a rented apartment be documented for the Finanzamt?
Invoices, payment confirmations, cost estimates, and a detailed description of the work performed should be retained. In the case of larger renovations, it is also advisable to have photographs of the apartment before work begins and after completion. Such documentation helps demonstrate whether only ordinary repairs were carried out or whether a significant increase in the property’s standard actually occurred. The current BMF guidelines note the taxpayer’s duty to cooperate where the previous condition of the building can no longer be clearly established.
Maciej Szewczyk
He gained experience as a consultant on IT projects for many international companies. In 2017, he founded the startup taxando GmbH, where he developed the innovative tax app Taxando, which simplifies the filing of annual tax returns.
Maciej Szewczyk combines technological expertise with in-depth knowledge of tax regulations, making him an expert in his field. In his private life, he is a happy husband and father and lives with his family in Berlin.
