Spain's 2025 Income Tax simulator is now live: Check if you owe money or get a refund
The Spanish Tax Agency tool lets you preview your Renta result without needing a Cl@ve or digital certificate
The countdown to this year’s Spanish income tax campaign (Declaración de la Renta) has officially begun. The 2026 filing period for the 2025 tax year opens on Tuesday April 8 and runs until Tuesday June 30. For many people across Spain, that annual date with the taxman brings the same nagging question: will I have to pay or am I getting money back?
The good news is you don’t have to wait until April to get a rough idea. The Agencia Tributaria has already activated its online simulator, known as Renta Web Open, so taxpayers can preview their likely result in advance.
What is Renta Web Open?
Renta Web Open is a simple online simulator that lets you enter your tax details and estimate the outcome of your return. It can also help you check if you are actually required to submit a return in the first place.
Unlike the full filing system, you do not need a digital certificate or Cl@ve login to use it. It’s purely for guidance, though, and doesn’t generate an official return.
You will still need to submit your actual Declaración de la Renta during the official window between April 8 and June 30.
How to access the simulator
You’ll find the tool on the official Agencia Tributaria website. Head to ‘All procedures’, click on ‘Other services’ and then select ‘Simulators’. From there, choose the ‘Renta Web Open Simulator’.
First, you will be asked for some basic details such as your NIF, marital status and whether you have children or elderly dependants. On the next screen, you can add income from employment, savings, investments or freelance work.
At the end, the simulator produces a PDF preview showing key figures, including total tax due and withholdings. If the final amount appears as a negative number, that means you are due a refund. If there is no minus sign, you will need to pay that amount.
Images: Agencia Tributaria
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