Funding service: Apply for KfW Funding
Submit funding applications in just a few clicks. autarc takes care of the entire process with certified energy consultants. Save up to 12 hours!

What is KfW funding 458?
KfW funding 458 is a government subsidy for heating replacement. The KfW subsidy is for the retrofitting of climate-friendly heating systems such as heat pumps in existing residential buildings. Up to 70 percent of eligible costs are reimbursed. For single-family homes, a maximum of 30,000 euros is eligible for funding.
How does autarc's funding aid work?
autarc Förderhilfe takes care of the entire application process for you. All powers of attorney are issued to our certified energy consultants. They check all data and submit the application. For you, this means: no worries when applying. All documents are managed directly in the AUTARC software. So you have everything in one place.
- Step 1: Collect data
- Step 2: Start testing
- Step 3: Submit an application
- Step 4: Get notified
Benefits of funding with autarc
- Time savings: Up to 12 hours less effort per project thanks to automated processes.
- Expert knowledge: Certified energy consultants check every application for completeness.
- Everything is central: All documents and notifications in one place in the AUTARC software.
- No errors: Professional review prevents rejections due to incomplete applications.
- Power of attorney included: Energy consultants act on your behalf at KfW Communications.
Apply for funding digitally
FAQ about funding aid
How much is KfW funding 458?
KfW 458 funding amounts to up to 70 percent of the eligible costs. A maximum of 30,000 euros is eligible for funding for a single-family home. This corresponds to a maximum grant of 21,000 euros per project.
Which heating systems are supported by KfW?
Heat pumps, biomass heating systems, solar thermal energy and fuel cells are supported. Connection to heating networks is also eligible. All systems must be based on renewable energy and meet certain efficiency criteria, including at least 65 percent of newly installed heating systems powered by renewable energy.
How long does it take to process the KfW application?
Processing by KfW usually takes 4 to 6 weeks. With autarc funding assistance, your application will be reviewed and submitted after just a few days. Missing documents are immediately identified and requested.
Can I also apply for funding for rented properties?
KfW funding 458 also applies to rented residential buildings. Owners can apply for funding regardless of use. The only important thing is that these are existing residential buildings.
What happens if the application is rejected?
If the application is submitted correctly by autarc Förderhilfe, rejections are very rare. Our certified energy consultants check all requirements in advance. If improvements are necessary, we will take over the communication with KfW.
What documents do I need for the KfW application?
Cost estimates, building data and technical documentation for the heating system are required. The AUTARC software guides you through all required documents. Our energy consultants check the completeness before submission.