About Simples IRS
Simples IRS helps people on recibos verdes (self-employed invoices) in Portugal understand how much they will pay in IRS (income tax), Social Security and VAT (IVA), and what the deadlines are. It has calculators, a tax calendar and guides written in plain language.
This English version is a translation provided for convenience. In case of doubt, the Portuguese version prevails: Sobre o Simples IRS.
It is free. You do not need an account.
All the tools and guides are free and there is no paid version. You do not need to create an account or leave your email to use the site.
To stay free, the site is funded by discreet Google AdSense ads. That is how we pay for hosting and for the time it takes to keep the figures right.
Who makes the site
Simples IRS is an independent project. The Simples IRS team is responsible for the site and its content.
To get in touch: simplesirs.pt@gmail.com (see the Contact page).
Simples IRS does not belong to the Tax and Customs Authority (Autoridade Tributária e Aduaneira, AT, the "Finanças") or to Social Security, and does not speak on their behalf.
How we check the figures
We only use official sources
The Diário da República (where laws are published), the Portal das Finanças and the Segurança Social website.
Every figure has a date
On each page we list the sources used and the date they were checked ("Checked on"). The 2026 tax figures were checked on 11 November 2026.
When the law changes, we update
Tax laws change often, especially with the State Budget (Orçamento do Estado). When that happens, we review the affected pages and change the date.
If something has no official source, it does not go in
We would rather give no number than a wrong one.
Found a mistake? Write to simplesirs.pt@gmail.com with the page address and, if possible, the official source. We will correct it and update the date.
Your numbers stay with you
The figures you type into the calculators (income, age, expenses) are calculated in your own browser, on your computer or phone. They are neither sent to us nor stored by us. More details in the Privacy policy.
It does not replace an accountant
Simples IRS gives general information and estimates. It is not tax, accounting or legal advice and does not replace a certified accountant, the AT or Social Security. The amount that counts is always the one calculated by the Finanças and Social Security. Read the Legal notice.