File IRS in Portugal in 15 minutes – in English
Smart tax filing for expats in Portugal. We compare joint vs. separate filing, calculate every deduction, and generate a ready-to-submit Modelo 3.
Trusted by expats across Portugal · Validated for 2025 tax season
Tax return plans to fit your needs
Simple pricing — no hidden fees, no subscriptions. Pay once, file once.
Here's everything that's included
Both plans include all income categories and features. Couple plan adds automatic joint vs. separate comparison.
Both plans include a 14-day money-back guarantee — no questions asked.
How SmarTax works
Tell us about yourself
Family status, residency, income types — takes 3 minutes
Upload your declaration
Download your declaration draft from Portal das Finanças and upload it — we guide you step by step
We optimize your taxes
Our engine compares joint vs. separate filing and finds the option that saves you the most
Download & submit
Get your ready-to-submit declaration and upload it to Portal das Finanças
Not ready to commit?
Try our free IRS simulator — enter your income details and see your estimated refund in 2 minutes. No signup required.
You're in safe hands
Your data and calculations are protected at every step.
Audited by Contabilista
Our calculation engine has been reviewed by a licensed Contabilista Certificado for accuracy of formulas, rates, and tax code compliance.
No login sharing
Unlike accountants, we never ask for your Portal das Finanças credentials. You upload and submit the declaration yourself — we just generate it.
Money-Back Guarantee
Not satisfied? Full refund within 14 days, no questions asked. Processed within 5 business days.
Stop worrying about your Portuguese IRS
Accurate calculation, expert-verified formulas, and protected by our money-back guarantee.
Get Started — From €29Who we can help
SmarTax works for the most common expat tax situations in Portugal.
Expat Employee
Employed in Portugal or remotely? We handle your employment income and all standard deductions. Foreign salary support is coming soon.
Employment · Foreign income (soon) · NHR
Freelancer / Self-Employed
Recibos verdes, simplified regime, and proper coefficient calculations. Freelance income with all activity types supported.
Freelance · Recibos Verdes · Simplified regime
Married Couple
Automatic joint vs. separate filing comparison — see exactly which option saves more, with real numbers from your data.
Joint vs. Separate · Mixed Income · Auto Comparison
Choose the right approach for your situation
| SmarTax | Accountant | DIY (Portal) | |
|---|---|---|---|
| Price | From €29 | €150-300 | Free |
| Time to file | ~15 min | Days/weeks | Hours |
| Joint vs. separate optimization | Depends on accountant | ||
| Foreign income (coming soon) | Challenging | ||
| Available 24/7 | |||
| Verified by Contabilista | |||
| In English | Varies | ||
| Best for | Standard returns, couples, foreign income | Complex audits, disputes with AT | Simple Cat A only |
SmarTax is the faster, digital-first alternative for standard IRS returns. For complex tax audits or disputes with Autoridade Tributária, we recommend a Contabilista Certificado.
What expats say about SmarTax
“I used to pay €250 to my accountant every year. SmarTax did the same thing in 20 minutes for €29. I almost felt guilty.”
Sarah M.
Software Engineer, British expat in Lisbon
“The joint vs. separate comparison saved us €340. Our accountant never even mentioned this option.”
Andrei K.
SDE, Remote worker in Porto
“First time filing taxes in Portugal. I was terrified. SmarTax made it so simple I finished during lunch.”
Maria L.
Freelance designer, Digital nomad in Faro
Stop worrying about your Portuguese IRS
Accurate calculation, expert-verified formulas, and protected by our money-back guarantee.
Get Started — From €29Still got questions?
File your taxes with confidence
No more guessing, no more expensive accountants. SmarTax walks you through every step — from upload to submission — in plain English.
Built by expats, for expats
“When I moved to Portugal, I spent 3 days trying to understand my first tax return. Then I paid €150 for an accountant who spent 20 minutes on it.
I built SmarTax so no expat has to go through that again.”
— Roman Verevkin
Founder of SmarTax
Ready to file your Portuguese taxes?
Don't wait until June 30 — Portal das Finanças crashes every year in the final week.
Check My Savings — From €29