Taxfix
Taxfix helps European employees file taxes in 22 minutes, not hours.
Taxfix is Europe's leading AI-native mobile tax filing app that simplifies complex tax returns through a conversational interface, reducing filing time from hours to 22 minutes. The platform serves individual taxpayers across Germany, Italy, and Spain, offering both self-filing (€39.99) and expert-assisted services (20% of refund). With over 8 million tax returns filed and €4.5 billion in refunds processed, Taxfix has helped millions of eligible employees claim an average of €1,172 in unclaimed refunds.
Problem solved
Over seven million eligible European employees forgo billions in unclaimed tax refunds annually because traditional tax filing is too complex and time-consuming.
Target customer
Individual employees and pensioners in Germany, Italy, and Spain who are entitled to tax refunds but find traditional tax filing complex or time-consuming.
Founders
M
Mathis Büchi
Co-Founder
Previously founded Smallpdf (1M+ daily users) with Lino Teuteberg; studied International Business at Hong Kong University; spent 7 years in Hong Kong and Korea.
L
Lino Teuteberg
Co-Founder
Co-founded Smallpdf with Mathis Büchi; childhood friends since age 10; board member and angel investor at redalpine.
Funding history
Series A
$13M
August 2018
Led by Valar Ventures (Peter Thiel)
· Creandum, Redalpine
Series C
$65M
April 2020
Led by Index Ventures
· Neil Rimer (board member)
Series D
$220M
April 2022
Led by Ontario Teachers' Pension Plan
· Index Ventures, Valar Ventures, Creandum, Redalpine
Total raised:
$330M
Industries
Pricing
Self-filing: €39.99 flat fee (€59.99 for joint assessment). Expert service: 20% of tax refund (minimum €99.99). Free: app download, tax calculator, and refund estimation.
Notable customers
8M+ individual tax filers across Germany, Italy, and Spain; endorsed by Finanztip
Integrations
ELSTER-Schnittstelle (official German tax authority interface), TaxScouts (acquired 2024), Steuerbot (portfolio brand)
Website
Competitors
Taxdown
Broader European coverage but less focused on conversational UX and mobile-first experience.
Taxfyle
US-focused accountant marketplace; lacks Taxfix's AI-driven questionnaire and mobile app simplicity.
Wundertax
German competitor with similar self-filing model but smaller user base and lower funding.
Thriday
Australian-focused; broader accounting platform but lacks Taxfix's tax refund specialization.
Why this matters: Taxfix is Europe's leading tax fintech with $330M raised and $1B+ valuation, solving a massive market problem: 7M+ eligible Europeans annually forgo billions in refunds due to filing complexity. The founding team (Büchi & Teuteberg) previously scaled Smallpdf to 9M users without marketing spend, demonstrating exceptional execution capability.
Best for: European employees who want to claim tax refunds quickly without hiring an accountant or spending hours on complex forms.
Use cases
Quick tax refund claim
An employee in Berlin answers 70 personalized questions in 22 minutes using Taxfix's chat interface, receives €1,172 refund without ever opening a tax form or hiring an accountant. The app handles submission directly to German tax authorities.
Instant refund option
A self-employed contractor uses Taxfix's expert service and receives 50% of their refund within one business day via the Instant Refund feature, while awaiting final tax authority approval for the remainder.
Accountant-assisted filing
A retiree in Spain uses TaxScouts (Taxfix's acquired brand) to have their tax return prepared by a licensed tax advisor, paying only 20% of the refund amount rather than hourly fees.
Alternatives
Taxdown
Broader European geographic reach but less intuitive mobile experience and lower user ratings.
Steuerbot
Now part of Taxfix's portfolio; similar conversational tax filing approach but smaller market share.
Steuersparbox
German tax software with more feature depth but steeper learning curve than Taxfix's simplified interface.
FAQ
What does Taxfix do? +
Taxfix is a mobile app that simplifies tax filing by asking users personalized questions in a conversational format, then submitting their tax return directly to authorities. It helps users claim unclaimed tax refunds—averaging €1,172 per user—in just 22 minutes.
How much does Taxfix cost? +
Self-filing costs €39.99 (€59.99 for joint returns). Expert-assisted service costs 20% of your tax refund (minimum €99.99). Downloading the app and estimating your refund are free.
What are alternatives to Taxfix? +
Taxdown (broader European reach but less intuitive), Taxfyle (US-focused accountant marketplace), Wundertax (German competitor), and traditional tax software like Steuersparbox (more features, steeper learning curve).
Who uses Taxfix? +
Individual employees and pensioners across Germany, Italy, and Spain who want to claim tax refunds quickly. Over 8 million users have filed through Taxfix, generating €4.5 billion in refunds.
How does Taxfix compare to Taxdown? +
Both offer conversational tax filing, but Taxfix has significantly higher user ratings (4.6 stars, 255K+ reviews) and is Europe's #1 mobile tax app. Taxfix also integrated TaxScouts for accountant-assisted service, while Taxdown lacks equivalent expert services in all markets.
Tags
tax filing
tax refunds
mobile app
fintech
AI-native
accountant services
conversational UI
European markets