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RETROACTIVE APPLICATION

Research Allowance (Forschungszulage) Retroactive Application – Claim Up to 6 Years of Funding

Conducted R&D but never applied for the Research Allowance? No problem – retroactive applications from 2020 onward are possible and often particularly lucrative.

15+ M €
Secured Research Allowance
100% Success
Success Rate BSFZ Certificates
< 4 Months
Average Processing Time
0
Retroactive eligibility
0
Earliest applicable fiscal year
0
Funding rate (same retroactively)
0
NOVARIS approval rate

Retroactive Application – Why Now Is the Best Time

The Research Allowance Act (FZulG) has been in effect since January 1, 2020. All fiscal years since 2020 are generally eligible – provided the tax assessment for the respective year is still open or amendable. Are you potentially entitled to a substantial funding amount?

A large proportion of eligible companies have not yet used the Research Allowance. The reasons: lack of awareness, uncertainty about eligibility, insufficient capacity. The result: billions in funding remain unused.

Why is right now the best time for retroactive application? Three factors speak for it:

Statute of Limitations Risk for 2020

The assessment period for fiscal year 2020 is about to expire in many cases. Those who do not act now will permanently lose their claim.

Cumulative Effect

Applying for multiple years at once can yield a six-figure or even seven-figure funding amount in one go – a unique opportunity.

SME Bonus from 2024

The increased 35% funding rate for SMEs applies from fiscal year 2024 through the Growth Opportunities Act. You can directly benefit from this.

Urgent action required: The longer you wait, the more past fiscal years risk expiring. The retroactive application is time-critical – start assessing your funding potential now. NOVARIS offers a free initial analysis to identify which years are still open for you.

Overview: Which Fiscal Years Are Still Open?

The following table provides an overview of the funding conditions for each fiscal year since the FZulG came into force. The urgency assessment is based on typical assessment periods – the actual situation depends on the individual tax assessment.

Fiscal Year Status Funding Rate Max. Assessment Basis Action Required
2020 Usually still possible 25% 4M EUR Urgent! Expiry imminent
2021 Offen 25% 4M EUR Apply soon
2022 Offen 25% 4M EUR Gute Chancen
2023 Offen 25% 4M EUR Gute Chancen
2024 Offen 25% / 35% KMU 12M EUR Optimal
2025 Offen 25% / 35% KMU 12M EUR Optimal
Important regarding fiscal year 2020: The assessment statute of limitations is particularly critical. The standard assessment period is 4 years and begins at the end of the calendar year in which the tax return was filed. If the 2020 tax return was filed in 2022, for example, the assessment period ends at the end of 2026. Act immediately!
2020–2025: Personnel Costs Only

The 20% overhead allowance only applies from 2026. For 2020–2025, only gross wages of R&D employees and contract research costs (70%) are eligible. Nevertheless, funding amounts are substantial.

From 2024: SME Bonus 35%

The Growth Opportunities Act brings 35% funding rate for SMEs and a tripled assessment basis to EUR 12 million. Particularly attractive for retroactive claims from 2024.

Requirements for the Retroactive Application

For a retroactive Research Allowance to be successfully claimed, several requirements must be met simultaneously. The good news: most requirements can also be fulfilled or documented retroactively. Here are the five key requirements in detail:

1

R&D Projects in the Respective Fiscal Year

Actual R&D activities according to the Frascati Manual: basic research, applied research, or experimental development. The key criterion is overcoming a technical uncertainty.

2

Tax Assessment Still Open or Amendable

The tax assessment must still be open – subject to review, objection filed, or assessment period not yet expired. Your tax advisor can check the status.

3

Personnel Costs Verifiable

Gross wages and salaries of R&D employees from payroll records, employment contracts, and salary statements – available in most companies even for past years.

4

R&D Character Documentable

Documentation via a BSFZ application with project description and scientific-technical objectives. Can also be submitted retroactively – no application needed during the research period.

5

Separate BSFZ Application for Each Year

A separate BSFZ application required for each fiscal year. A multi-year project can be described as a continuous project.

Summary of requirements:

1. R&D projects carried out in the respective fiscal year
2. Tax assessment still open (subject to review or assessment period)
3. Personnel costs verifiable from payroll accounting
4. R&D character documentable retroactively (BSFZ application)
5. Separate BSFZ applications for each fiscal year

The Biggest Challenge: Documenting R&D Retroactively

By far the biggest challenge with retroactive applications is the retrospective documentation of R&D activities. Many companies have carried out excellent R&D work in recent years but have not maintained separate R&D time tracking or formal project documentation as required by the FZulG.

The good news: a complete reconstruction is possible in the vast majority of cases. R&D activities leave numerous traces within the company that can be compiled retroactively into audit-proof documentation.

Sources for Retrospective Reconstruction

The following documents and data sources are excellent for retroactively documenting R&D activities:

Project Plans & MinutesGantt charts, sprint plans, milestone reports
Email & CommunicationEmails, Teams chats, Slack messages
Jira, Git & ConfluenceCommits, tickets, timestamps
Patents & PublicationsStrong R&D evidence with legal standing
Prototypes & TestsTest results, lab reports, experimental protocols
Org Charts & Job ProfilesR&D assignment and effort allocation

NOVARIS Consulting has extensive experience with retrospective reconstruction of R&D documentation. Our consultants work closely with your technical departments to review, structure, and convert existing documents into audit-proof documentation meeting BSFZ and tax office requirements.

Practical tip: In parallel with the retroactive application, start setting up ongoing time tracking for your current R&D activities. This saves you the reconstruction effort for future years. Learn more in our guide to R&D time tracking.

Calculation Example: How Much Funding You Can Claim

To illustrate the potential of retroactive application, consider a realistic example. Take an SME with 8 R&D employees and an average gross salary of EUR 75,000 per year. The company has continuously conducted R&D since 2020 but never applied for the Research Allowance.

Wirtschaftsjahr Bemessungsgrundlage Fördersatz Forschungszulage
2020 600.000 EUR 25% 150.000 EUR
2021 600.000 EUR 25% 150.000 EUR
2022 600.000 EUR 25% 150.000 EUR
2023 600.000 EUR 25% 150.000 EUR
2024 720.000 EUR 35% (KMU) 252.000 EUR
2025 720.000 EUR 35% (KMU) 252.000 EUR
Total 1.104.000 EUR

Explanation: The assessment basis for 2020–2023 is 8 employees x EUR 75,000 = EUR 600,000 (pure personnel costs). From 2024, the 20% overhead surcharge is added: EUR 600,000 + EUR 120,000 = EUR 720,000. The funding rate for 2020–2023 is uniformly 25%; from 2024, the SME rate of 35% applies.

Over one million euros in Research Allowance – and many companies do not know they are entitled to this money. The Research Allowance is not a subsidy but a legal entitlement. Every company that conducts R&D and meets the requirements has a right to this funding.
Contract Research +EUR 140,000/Year

70% of external R&D remuneration is eligible. At EUR 200,000/year to research partners: +EUR 140,000 assessment basis. Learn more

Owner-Operator Flat Rate

Shareholders & sole proprietors: EUR 100/hour (max. 40h/week). Ideal for owner-managed companies with active R&D involvement.

How the Retroactive Application Works with NOVARIS

The retroactive Research Allowance application is a structured process that NOVARIS Consulting guides from initial analysis to payout. Our proven process ensures no funding is left behind and documentation is audit-proof.

1. Initial Analysis

Free potential assessment: open years, eligible projects, expected allowance.

1–2 Hours
2. Documentation

Project reconstruction with your departments, audit-proof project descriptions.

2–4 Weeks
3. BSFZ Application

Separate applications per fiscal year to the certification body.

2–4 Months
4. Tax Office

Submit Annex FZ with assessment basis and requested allowance.

2–4 Months
5. Payout

Offset against tax liability or direct refund.

Immediate
Total duration: From initial analysis to payout typically takes 4–8 months. For retroactive applications covering multiple years, BSFZ applications can be submitted in parallel, accelerating the overall process. NOVARIS handles complete coordination and keeps you updated on every step.
Success-Based & Risk-Free

100% success rate (as of March 2026). Most affordable provider on the market. Payment only on success. Free initial analysis.

Risk Without Advisory

Incorrect retrospective documentation can be classified as tax evasion — criminal consequences, fines, back-payments with interest. Particularly strict scrutiny for retroactive claims.

FAQ: Retroactive Research Allowance

The Research Allowance is assessed as part of the income or corporate tax assessment. The standard assessment period is 4 years starting at the end of the calendar year in which the tax return was filed. Example: If the 2020 tax return was filed in 2022, the deadline expires at the end of 2026. In cases of negligent tax reduction, the period extends to 5 years; for tax evasion, to 10 years. As long as the tax assessment is subject to review, the Research Allowance can be applied for retroactively at any time.

Yes, absolutely. Each fiscal year is evaluated separately. You can register different R&D projects with the BSFZ for each year. This is actually the norm: companies evolve their research portfolios over time. A separate BSFZ application is filed for each fiscal year. A multi-year project can be described as a continuous project.

No, Annex FZ (Research Allowance) can be submitted subsequently without amending the original tax return. The Research Allowance is assessed as a separate decision and offset against tax liability – or directly refunded. Your tax advisor only needs to submit Annex FZ. NOVARIS prepares it and coordinates with your tax advisor.

NOVARIS works on a success-based model. You only pay if the Research Allowance is actually granted. The initial analysis is always free and non-binding. No risk for you: if no allowance is granted, no costs are incurred.

No, the increased SME funding rate of 35% was only introduced with the Growth Opportunities Act and applies from fiscal year 2024. For 2020–2023, the uniform 25% rate applies regardless of company size. From 2024, SMEs benefit from the higher rate. The increased assessment basis of EUR 12 million (previously EUR 4 million) benefits all company sizes.

Related Content

Sources & legal references

All statements regarding eligible base, funding rates, and application process are based exclusively on the following official legal sources and authority documents. Research date: .

Note: This page does not replace individual tax advice. For a binding assessment of your project, please contact us or your tax advisor.

Since 2021
FZulG specialists
25+ engagements
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EUR 18.85M
Filed volume · 100 % approval

Why DIY Applications Fail

The FZulG application process is technically complex and fraught with pitfalls. BSFZ rejections, incorrect cost allocations, and missed deadlines cost German companies millions in unclaimed funding every year.

~29 %
3–6 Months
50.000 €+
€ 18,85Msecured
25+clients
100 %approval rate
6 yearsFZulG experience

With NOVARIS: 100% Approval Rate (as of March 2026)

NOVARIS Handles Your Complete R&D Tax Credit Application

From the initial assessment of your R&D projects through BSFZ certification to payout by the tax office – NOVARIS manages the entire process. Success-based and risk-free.

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Max Nodes
Max Nodes
Managing Director & Founder of NOVARIS Consulting. Specialized in German R&D tax credits (FZulG) with a 100% approval rate. Learn more