For individuals
Explore questions about living, working and earning income in Spain, in your own words.
Open beta · Starting with Spain
Tax questions.
Clearer answers.
Meet a simpler way to navigate Spanish tax.
Request your access link and ask your first question free.
More countries are coming soon.
Want a first look? Explore the product preview
Tax research assistant · SpainInterface preview
I live in Spain and work as a freelancer. What should I review before filing?
WorldTax.aiIllustrative research outline
Start with your activity and income.
A useful research outline separates the facts about your work from the Spanish rules and filing obligations to examine.
01Your activityDescribe your work, registrations and relevant dates.
02Income & recordsOrganize income, expenses and documents for further review.
To go further: your activity, tax year and income sources.
Legislation · Treaties · Official guidance
A source-led research workflow for Spain
- Spanish tax legislation relevant to the question.
- Official guidance on the specific issue.
- An applicable tax treaty, if the question involves another country.
Illustrative interface preview. Request an access link to ask your first question in the beta.
Explore the interface. Request an access link to try the beta.
SpainAvailable nowMore countries coming soon
100+Beta testers
10,000+Questions asked
1Country live · Spain
2025Started in Barcelona
Different situations. One starting point.
Built around
your tax questions.
Personal income. A growing business. A complex client case. Start with a question about Spain, with wider coverage coming soon.
For businesses
Find a starting point for research on Spanish business activity, VAT and filing obligations.
For advisors
Structure your Spanish client research by issue, facts and the source material to examine.
Focused today. A broader vision.
Starting with Spain.
Built to go further.
Our beta starts with Spanish tax questions. More countries are coming soon, guided by the situations that matter to our users.
- Your situation, in your words.Start with a question, not a search query.
- A focused starting point.Explore Spain in the current beta.
- A growing country roadmap.Tell us where you'd like WorldTax.ai to go next.
Spanish tax research brief
An illustrative view of a structured question
Country coverage
Spain · AvailableMore countries · Soon
Research areas to review
Personal taxYour situation
Business activityRelevant rules
Income & filingOfficial guidance
One country today.A broader perspective for tomorrow.
From question to direction
Less searching.
More understanding.
The experience we're building follows a simple idea: help you ask the right question and understand what to look at next.
Start with your question.
Use your access link to describe a Spanish tax situation in your own words.
What should I review before starting a business in Spain?
Connect the context.
Identify the facts and Spanish tax issues to examine. Keep the research focused on your situation.
SpainFactsResearch
See the way forward.
Bring the research together into a structured outline to review with your team or advisor.
A clearer research outline
Issues. Sources. Next questions.
Our product philosophy
Clarity you can follow.
Judgement you keep.
Good research should make a complex situation easier to examine. That principle guides how we're developing WorldTax.ai.
Sources before certainty.
The research should point back to the material behind it.
Assumptions made visible.
Missing facts and open questions should be easy to spot.
Human expertise at the centre.
A useful assistant supports professional review and informed decisions.
About WorldTax.ai
Born in Barcelona.
Built for a borderless world.
WorldTax.ai started in 2025 with a simple belief: everyone should have access to tax guidance, not only those who can afford an advisor for every question.
Tax rules are spread across legislation, treaties and official guidance, and they change from one country to the next. We are a small, independent team in Barcelona building an AI agent that lets you ask in plain language, shows its assumptions and points to the sources behind each answer, so you know what to check and when to bring in a professional.
We begin with Spain because depth matters more than breadth. Since the beta opened, more than 100 testers have asked over 10,000 questions, and what they ask shapes what we build next.
Follow WorldTax.ai on LinkedInOur homeBarcelona41.39° N · 2.17° E
2025
The idea takes shape
WorldTax.ai starts in Barcelona, with a focus on making tax research clearer and easier to follow.
Today
Open beta in Spain
More than 100 testers have asked over 10,000 questions so far. Request a link to join and help shape what comes next.
Next
More countries
New jurisdictions are added guided by what our users ask for. Tell us where you would like us to go.
Our mission
Give everyone access to clear tax guidance through an AI agent.
Sources first
Research should point back to the material behind it, not replace it.
An international view
Barcelona is a crossroads. We build for people whose tax life crosses borders.
Start small. Explore further.
Your first question is free.
More testing? Let's talk.
Request an access link to try the Spain beta with one free question. If you'd like to test further, pricing is available on request.
Spain beta
BY ACCESS LINKFree
1 question to get started
Bring a real question about Spain and get a first feel for WorldTax.ai.
- One free question
- Spain is the only beta country
- For individuals, businesses and advisors
Extended testing
On request
Pricing for further testing
Want to explore more questions? Tell us about your needs and request test pricing.
- Discuss additional testing access
- Share your research use case
- Request a quote from our team
Beta coverage: Spain only. More countries coming soon.
A few useful answers
Let's make
things clearer.
Have a specific question about the product?
We'd like to hear from you.
What is WorldTax.ai?
WorldTax.ai, also written World Tax AI, is a startup, founded in 2025 and based in Barcelona, developing an AI tax research assistant. Our mission is to give everyone access to clear tax guidance through an AI agent: ask in plain language, see the assumptions and sources, and know when to involve a professional.
Can I try WorldTax.ai today?
Yes. WorldTax.ai is in open beta for Spain. Request an access link and we will send you a personal link to test the product, including one free question. The interactive preview on this page shows illustrative examples of the interface.
Who is the platform being built for?
The platform is for individuals, businesses and professionals researching tax questions. The current demo covers Spain. Select an audience in the interface preview to see an example.
Where is WorldTax.ai based?
We are based in Barcelona, Spain, and started the project in 2025. We are currently in open beta, starting with Spain.
Which countries are available?
Spain is currently the only country available in the demo. More countries are coming soon. Let us know which country you'd like to see next when you contact the team.
How much does it cost?
Your first question in the Spain beta is free. Pricing for extended testing is available on request. Contact us with your use case to discuss further test access and request a quote.
Does WorldTax.ai replace a tax advisor?
The intended role is to assist with research and understanding. Tax decisions depend on your facts and the rules in force, and should be reviewed with a qualified professional when appropriate.
How do I get access or request pricing?
Choose “Request your access link” for the Spain beta or “Request test pricing” for extended testing. The form sends your request directly to our team, and we reply by email.
One question. A useful first step.
Start with Spain.
Your first question is on us.
Request your access link and try one question free in the Spain beta. Looking for more? Ask us about pricing for extended testing.
Spain available now · More countries coming soon.