What TaxDown does

TaxDown is a Madrid-based fintech founded in 2019 that operates an AI-powered digital tax filing platform serving individual taxpayers and self-employed professionals in Spain and Mexico. The platform connects directly to the Spanish Tax Agency (Agencia Tributaria/AEAT) via official "Colaborador Social" status, retrieves taxpayer financial data automatically, and guides users through a guided questionnaire to identify applicable deductions across 150+ state and regional categories. An AI trained on over 800,000 real tax declarations generates optimized filings that are validated by 40+ registered tax advisors before submission, with the company claiming the largest share of personal income tax returns processed in Spain and over 2 million returns filed to date.

The core technology stack combines direct AEAT data integration, proprietary NLP-powered deduction detection (the "Luz" AI assistant), structured-data processing for investment and crypto holdings, and human-in-the-loop expert review. The platform supports multiple filing personas including salaried employees, property owners, investors (stocks and cryptocurrency), self-employed (Autónomos), expatriates, and non-residents, with dedicated products such as the AsesorIA conversational advisor, Taxductor crypto reporting tool, and a notifications service for Hacienda correspondence.

The business model combines a freemium acquisition funnel (free tax refund calculator with no registration required) with paid annual subscription plans (PRO starting at €35) and recurring monthly subscriptions for self-employed users (Plan Standard and Plan Premium Autónomos). Distribution operates through a B2B2C model embedded with 500+ corporate partners including BBVA, CaixaBank, Santander, Bankinter, Deutsche Bank, Revolut, Telefónica, Generali, and DKV, supplemented by direct digital channels (website, iOS/Android apps), content/SEO marketing, and referral programs. The company has raised approximately €30M+ across equity and debt rounds, reached profitability in 2025, and serves 4 million+ registered users.

Name

TaxDown

Legal name

Tax Down S.L.

Website

https://taxdown.es

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

101–250 employees

Short description

TaxDown is a Madrid-based fintech that uses AI and direct integration with the Spanish Tax Agency to help individual taxpayers and self-employed professionals in Spain and Mexico prepare, optimize, and file their income tax returns, serving over 4 million users through 500+ corporate partnerships.

Ownership category

akta.pro rank

Product category

Tax Preparation Software

NAICS

Accounting, Tax Preparation, Bookkeeping, and Payroll Services (5412), Other Accounting Services (541219)

SIC

Services-Computer Processing & Data Preparation (7374)

akta.pro primary industry

Tax Planning & Personal Tax Optimization Tools (FSAGADAJ)

akta.pro secondary industry

Tax Advisory & Compliance (BPAHABAB)

Keywords

• Tax filing software
• Personal income tax
• Self-employed tax management
• AI tax assistant
• Tax advisory services

Headquarters

HQ city

Madrid

HQ country

Spain

HQ region

Europe

Offices3 records

Markets served

GTM type

B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Tax Filing Subscription (Annual): Annual subscription plans for individual tax filing services. Users pay for access to AI-powered tax preparation, expert review, and submission to the tax authority. Plans range from Free (calculation only) to Premium tiers with full service including defense against tax authority inquiries.
2. Self-Employed (Autónomo) Management: Monthly subscription for self-employed individuals covering quarterly tax filings (IVA, IRPF), annual income tax, and accounting management through the platform. Standard and Premium tiers available with different invoice scanning limits.
3. Freemium / Free Tier: Free tax calculator available to all users. Allows estimation of tax refund/payment without commitment. Upsells to paid plans for filing services.
4. B2B Corporate Partnerships: Revenue from white-label or referral arrangements with corporate partners including banks and employers who offer TaxDown services to their customers/employees as a benefit.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

TaxDown operates an AI-powered digital tax platform that helps individuals and self-employed professionals in Spain prepare, optimize, and file personal income tax returns (IRPF). The platform connects directly with the Spanish Tax Agency (AEAT) via Cl@ve authentication, applies 150+ state and regional (autonómicas) deductions automatically, pairs AI automation with review by 40+ registered human tax advisors, and submits the declaration on the user's behalf. It also handles Hacienda notifications, quarterly filings for the self-employed, and cryptocurrency tax reporting.

Product overview

TaxDown operates as a multi-module AI-powered digital tax platform offering both consumer-facing and self-employed-facing services. The core consumer product is the TaxDown platform — a web and mobile application that uses AI to help individuals prepare, optimize, and file their income tax return (IRPF) in Spain, featuring a free tax calculator, a guided questionnaire-based filing flow (Borrador de TAXDOWN), a human expert review step, and direct AEAT submission. The AsesorIA provides an AI-powered fiscal advisor for conversational guidance. For self-employed users, TaxDown offers monthly subscription plans (Plan Standard Autonomos and Plan Premium Autonomos) covering tax filing, quarterly model submissions, accounting record-keeping, and incorporation/closure management. A Notifications service handles Hacienda correspondence and requirements on the user's behalf. All services combine AI automation with a human fiscal expert review layer, and the platform connects directly to the AEAT via Cl@ve authentication.

Differentiator

Problem solved

Functional benefit

Brands

• FINTAX: Registered trademark of Tax Down S.L.
• AsesorIA
• Taxductor
• AsesoresIA

Products and services

• TaxDown Platform Web and mobile application that uses AI to help individuals in Spain prepare, optimize, and file their annual personal income tax return (IRPF). The platform connects directly to the Spanish Tax Agency (AEAT), guides users through a 3-minute questionnaire, applies 150+ deduction rules, validates the result with a human fiscal expert, and submits the declaration on the user's behalf.
• AsesorIA (AI Fiscal Advisor) AI-powered conversational fiscal advisor that provides real-time answers to tax questions, guidance through complex scenarios, and personalized deduction recommendations in plain language, backed by human fiscal experts available within 24 hours.
• Servicio de Notificaciones (Hacienda Notifications Service) Service in which users upload a photo of any Spanish tax authority (Hacienda/AEAT) notification; TaxDown's fiscal team analyzes the case, prepares the required response, and presents it on the user's behalf, covering requirements, proposed liquidations, inspection procedures, payment demands, and attachment notices.
• Crypto Asset Reporting (Taxductor) Tool that analyzes and organizes cryptocurrency transactions from wallets and exchanges to prepare them for inclusion in the user's annual income tax return, handling the complexity of crypto capital gains reporting in Spain.

Quantifiable outcome

• Average savings of €350 per tax return through deduction optimization
• +5 more outcomes

Named customers9 records

Segments6 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability5 records

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• RevolutcoreGTM or Marketing Partner · 7 April 2026Revolut integrated TaxDown's tax advisory services into their mobile banking app, enabling Revolut users to file their income tax return directly from the Revolut platform. This partnership coincides with Spain's official tax declaration process using Renta WEB with Cl@ve.
• BBVA (Corporate)coreGTM or Marketing Partner · 1 January 2025BBVA partnered with TaxDown to help their new clients in Spain with tax declarations. BBVA offers TaxDown services as part of their digital banking ecosystem.
• CaixaBankcoreGTM or Marketing PartnerCorporate partner offering TaxDown services to their retail banking customers as part of their digital financial services.
• Banco SantandercoreGTM or Marketing PartnerCorporate partner offering TaxDown services to their customers through their digital banking channels.
• BankinterminorGTM or Marketing PartnerCorporate partner offering TaxDown services to their banking customers.
• Deutsche Bank SpainminorGTM or Marketing PartnerCorporate partner offering TaxDown services to their customers.

Scale indicators10 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• TurboTax (Intuit): US market leader in consumer do-it-yourself tax filing. Closest global analog to TaxDown's AI-driven B2C filing model; far larger scale and brand but operates in a different geography and tax regime.
• H&R Block: Established US tax preparation company offering DIY software, expert-assisted filing, and in-person services. Broader portfolio than TaxDown but directly comparable in core consumer filing value proposition and tiered expert-review offering.

Direct peers

• Taxfix: Berlin-based consumer tax filing app using AI-guided questionnaires with expert review for German income tax returns. Same product model, same PLG + subscription GTM, and the most direct European comparable in scale and stage.
• TaxScouts: UK-based digital tax preparation service combining AI automation with human accountant review for personal tax returns. Directly comparable model: AI + human-in-the-loop filing sold via subscription.
• Declarando: Spanish direct competitor in AI-assisted personal income tax filing, offering subscription plans with expert review. Head-to-head rival in the Spanish IRPF market.
• TaxAct: US consumer and small business digital tax preparation platform offering DIY filing with tiered subscription plans. Comparable freemium-to-paid conversion funnel and expert-assisted filing model.
• FreeTaxUSA: US digital tax filing platform competing primarily on price in the DIY segment. Comparable value positioning (free calculator tier upsold to paid filing) though without TaxDown's bank B2B2C distribution.
• Taxdoo: Hamburg-based fintech providing automated VAT and sales tax compliance for e-commerce and digital businesses. Comparable European tax-tech DNA but focused on cross-border e-commerce VAT rather than personal income tax.

Regional players

• ClearTax (Clear): India's leading consumer and SMB tax filing platform with AI-assisted income tax returns. Comparable digital-first, AI-augmented personal tax filing model in a non-overlapping geography.

Emerging players

• Holded: Spanish SMB software platform offering accounting, invoicing, and tax filing for small businesses and freelancers. Adjacent in Spanish market overlap and Autónomo target segment, with overlapping tax compliance functionality.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/tax_down
• YouTubeyoutube.com/TaxDown
• Facebookfacebook.com/tax.down.56
• LinkedInlinkedin.com/company/13005741
• Instagraminstagram.com/tax_down

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds10 records

Investors15 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about TaxDown