Germany's R&D tax incentive, up to €4.2m a year for SMEs.
The Forschungszulage is not a grant but a tax credit on evidenced R&D expenditure. Claiming it has two stages: the BSFZ certifies the R&D quality of the project, and the tax office offsets the allowance against corporation or income tax.
Eligibility
- An R&D project within the meaning of the Frascati Manual (basic research, industrial research or experimental development).
- The project started after 1 January 2020.
- The project is not yet complete at the time of application.
- No other public funding covering the same expenditure (no double funding).
- A taxable business in Germany.
Eligible costs
- Staff costs for personnel working on the R&D project (including a 20% overhead flat rate from 1 January 2026).
- 60% of the fee for contract research placed with third parties.
- Own work by sole traders and actively involved shareholders (€40 an hour, max. 40 hours a week).
- From 1 January 2026: certain movable fixed assets used exclusively for the project.
Common pitfalls
R&D quality can't be evidenced
The BSFZ rejects applications where the project shows no novelty, no uncertainty and no systematic method (the Frascati criteria). Routine product development is not eligible.
Overlooking double funding
For staff funded by ZIM, EXIST or Horizon Europe, the Forschungszulage cannot additionally be claimed on those costs. A clean cost split is mandatory.
Missing in-year time records
Without complete, contemporaneous time records (per project, per employee), the tax office won't accept the staff costs. Reconstructing them after the fact is regularly challenged.
Miscalculating the retroactive window
The four-year assessment period under § 169 AO begins at the end of the financial year. Anyone claiming in 2026 retroactively for 2022 has to check the deadline precisely, otherwise it has expired.
The application process
- 1. BSFZ application. Apply for the R&D project at the Bescheinigungsstelle Forschungszulage. Online portal (bescheinigung-forschungszulage.de). Typical processing time 2–4 months.
- 2. Receive the BSFZ certificate. If the decision is positive: a certificate confirming the R&D quality of the project. That certificate is a precondition for the tax claim.
- 3. Application to the tax office. With the BSFZ certificate in hand: apply for the Forschungszulage at your tax office, with evidence of the eligible expenditure.
- 4. Assessment. The tax office assesses the Forschungszulage. It is offset against corporation or income tax, or paid out in cash if the tax liability is smaller than the allowance.
How upsmart helps
We run the BSFZ procedure as a repeatable process: we structure R&D projects up front against the Frascati criteria, take time records from your existing time tracking, and keep the certificate and the tax office application bundled and versioned together. We continuously check for double funding with other programmes we run for you.
Combining it with other programmes
It can be combined with ZIM, EXIST, INVEST and state programmes only to a limited extent, and never on identical cost centres. A clear separation is required, typically through the project structure and time records.
Frequently asked questions
Up to €4.2m a year for SMEs (35% on application, on a €12m assessment base). Standard is €3.0m a year (25%). Plus a 20% overhead flat rate on R&D expenditure from 1 January 2026.
Yes, within the four-year assessment period under § 169 (2) no. 2 AO in conjunction with § 5 FZulG. Financial years from 2022 onwards are typically still open in 2026.
An R&D project description setting out the research question, the state of the art, the intended innovation, the project plan with milestones and the systematic method. The BSFZ assesses against the Frascati criteria.
No. The Forschungszulage is tax-free income within the meaning of § 3 EStG, and it does not reduce deductible business expenses either.
The Forschungszulage feeds into the ongoing tax assessment and is subject to tax audit. Documentation of the R&D expenditure and the time records has to be kept for the whole assessment period.
Read on in the blog
Forschungszulage 2026 for startups
Forschungszulage 2026 for SMEs
Claiming retroactively (§ 169 AO)
Guides and tips for this programme
Calculating the Forschungszulage: what you actually get
Forschungszulage: which staff costs are eligible
Forschungszulage for sole traders: costing your own work correctly
The BSFZ certificate: process, criteria and processing time
What counts as R&D? The Frascati criteria explained simply
Forschungszulage for contract research: the 60% rule and what has applied since 2024
Forschungszulage rejected: reasons and what you can do
Forschungszulage: keeping time records properly
Forschungszulage for software development and AI: what counts and what doesn't
The Forschungszulage in a tax audit: what the tax office checks
Forschungszulage 2026: amounts, rates, caps
Forschungszulage or ZIM? A direct comparison
Forschungszulage 2026 for startups: what the €4.2m ceiling really means
Forschungszulage 2026: a €12m assessment base, €4.2m for SMEs — what applicants need to know now
Forschungszulage retroactively: four years of cash flow almost nobody claims
Primary sources
- Research Allowance Act (FZulG)— Federal Ministry of Justice
- BSFZ portal— BSFZ
- Ministry of Finance application decree on the FZulG— Federal Ministry of Finance
- GBER Art. 25 (Regulation (EU) 651/2014)— European Commission
- § 169 AO — assessment period— Federal Ministry of Justice
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