Subsidies for new windows –
save twice
New windows not only improve the energy efficiency of your home, but are also financially supported by the government and many local authorities. There are various options available: grants, low-interest loans and even tax relief. We provide you with an overview of the most important programmes in 2025.
BAFA subsidy for individual measures (BEG EM)
What is subsidised?
The replacement of old windows with modern, energy-efficient windows with a U-value ≤ 0.95 W/(m²K).
How much funding is available?
- 15% subsidy on eligible costs
- + 5% extra bonus if an individual renovation roadmap (iSFP) is available
- Maximum 12,000€ per residential unit
- Minimum investment: €2,000
Prerequisite:
- Application must be submitted before the contract is signed.
- A certified energy efficiency expert must be involved.
Source: BAFA – Federal Office of Economics and Export Control
2. KfW promotional loan for energy-efficient building renovation (loan 261)
What is subsidised?
Window replacement as part of a complete energy-efficient renovation to create a so-called efficiency house.
How much funding is available?
- Loan of up to €150,000 per residential unit
- Repayment subsidies of 5–45%, depending on the efficiency house standard achieved
Prerequisite:
- Renovation must be carried out in accordance with the efficiency house standard (e.g. EH 85 or better).
- An energy consultant is required.
- Submit your application to your bank before starting the project.
Source: KfW – Energy-efficient renovation (loan 261)
3. Tax bonus pursuant to Section 35c of the Income Tax Act (EStG)
What is subsidised?
Costs for energy efficiency measures on owner-occupied residential property – including window replacement.
How much funding is available?
- 20% tax reduction spread over 3 years
- Maximum €40,000 per property
Requirements:
- The property must be at least 10 years old
- Only for owner-occupied properties
- The measure must be carried out by a specialist company
Important: This funding cannot be combined with BAFA or KfW funding.
Source: Federal Ministry of Finance – Tax bonus for energy efficiency measures
4. Regional support programmes
Many cities and municipalities offer additional subsidies – often in combination with federal programmes.
Here are a few examples (as of 2025):
| Location | Subsidy |
|---|---|
| Munich | Up to €5,040 for single-family homes |
| Heidelberg | Grants of up to €12,000 |
| Karlsruhe | €50/m² window area, max. €5,000 |
| Stuttgart | 30% of costs, max. €15,000 |
| Tübingen | €500 per window, max. €5,000 |
Tip: Check with your city or district administration or on their website for current funding opportunities.
Source: klimafreundliches-bauen.de – Window funding 2025
Our tip for you
Seek advice from a certified expert. They will not only help you with optimal planning and execution, but will also assist you with the application process. This will ensure that you do not miss out on any funding opportunities.