Spain's 2025 Tax Return: How to Use the Simulator and Check Your Fiscal Data Now

The 2025 Tax Campaign Is Coming — But You Can Get Ahead Right Now

Spain's 2025 income tax campaign (Campaña de la Renta 2025) officially opens on April 8, 2026 and runs until June 30, 2026. But you do not have to wait until April to start preparing. Since March 18, two important tools have been available to all taxpayers:

1. Your fiscal data — the economic and financial information the tax agency (Agencia Tributaria / Hacienda) holds about you
2. The Renta WEB Open simulator — a free tool that lets you estimate whether your return will result in a payment or a refund, before the campaign even begins

For the large number of residents and expats across Spain who are required to file a Spanish tax return — whether on employment income, rental income, pension income, investment returns, or a combination — using these tools now can save time, avoid surprises, and help you plan ahead.

What Is Renta WEB Open?

Renta WEB Open is a simulator version of the standard Renta WEB platform used to file the actual Spanish tax declaration. It is designed to give taxpayers a realistic preview of their tax situation without requiring any personal identification or login.

Crucially, Renta WEB Open:

• Does not require you to log in — no Cl@VE, certificate, or NIF validation needed
• Does not use your actual fiscal data — you enter figures manually, which means you can model different scenarios
• Cannot be used to submit a return — it is a simulator only; the results are not filed with Hacienda
• Can calculate both individual and joint declarations — useful for couples deciding which option is more favourable

In short, it is a no-commitment way to get a clear picture of your likely tax liability or refund before the official campaign opens.

How to Access the Simulator

To use Renta WEB Open, go to the Agencia Tributaria website (agenciatributaria.es), navigate to the Renta section, and click on Renta Web Open Simulador — updated for the 2025 tax year.

Once inside, you will see two options:

• "Nueva declaración" — start a new declaration from scratch by entering your income, deductions, and personal circumstances
• "Cargar" — import data from a previously saved declaration file (.ses format) if you have used the tool before

From there, you can choose your preferred official language (Spanish, Catalan, Basque, or Galician), select individual or joint declaration mode, and begin entering figures section by section. The system calculates the result automatically as you go, updating the summary in real time.

When you reach the final page — "Documento de ingreso o devolución" (payment or refund document) — you will see clearly whether your 2025 return is expected to result in money owed to Hacienda or a refund coming back to you. The tool will also indicate which option (individual or joint) is more favourable if you are filing as a couple.

You can generate a PDF preview of the simulated declaration — useful for keeping a record or sharing with an accountant — though this document is not valid for official submission.

How to Check Your Actual Fiscal Data

Alongside the simulator, you can now access the fiscal data that Hacienda already holds about you — the income, deductions, and financial information it has received from employers, banks, pension providers, and other third parties. This is the data that will pre-populate your actual draft declaration (borrador) when the campaign opens in April.

Checking your fiscal data now allows you to:

• Spot any errors or missing information before the campaign opens
• Verify that your employer has reported your salary correctly
• Confirm rental income, bank interest, dividends, and other passive income figures
• Begin gathering supporting documents for any deductions you plan to claim

To access your fiscal data, you need to authenticate using one of the following methods:

• Cl@VE Móvil — Spain's digital identity app, linked to your NIE or DNI
• Digital Certificate (Certificado Digital) — installed in your browser
• Electronic DNI (DNI electrónico) — with a card reader
• Reference Number (Número de Referencia) — obtained via the AEAT website using your NIF and data from a previous return
• eIDAS — for EU citizens using their home country's digital identity system

If you have the Agencia Tributaria mobile app installed, you will receive a notification directly on your phone with a quick-access link once the fiscal data for 2025 becomes available in your profile.

If this is your first time accessing the 2025 tax year services, the system will ask you to confirm or update your domicilio fiscal (registered tax address) before showing your data. Make sure this is correct — it affects which regional deductions you are entitled to claim.

The Full Calendar: Key Dates for the 2025 Tax Campaign

The 2025 Renta campaign runs from April 8 to June 30, 2026. Here are the key dates to note:

• From March 18: Fiscal data and Renta WEB Open simulator available
• April 8: The campaign officially opens — online submissions via Renta WEB begin and continue until June 30
• April 29: Telephone appointment booking opens — for those who want to file by phone with the help of an Agencia Tributaria agent (without needing to visit a Hacienda office in person)
• May 6: Telephone declarations begin — once you have a telephone appointment, you can file your return by phone from this date
• May 29: In-person appointment booking opens — for those who want to visit a Hacienda office in person. Appointments can be booked until June 27
• June 1: In-person declarations begin at Hacienda offices, with dedicated counters staffed by tax officials
• June 25: Deadline for declarations with a payment result if you have chosen bank direct debit (domiciliación bancaria) as your payment method
• June 30: End of campaign — the absolute final deadline for all submission methods: online, telephone, and in-person

Who Needs to File in Spain?

Not everyone living in Spain is required to file a tax return — but many residents are, and the thresholds are lower than many people assume. As a general rule, you are required to file if you are a Spanish tax resident (spending more than 183 days per year in Spain) and:

• You earned more than €22,000 from a single employer
• You earned more than €15,000 from two or more employers (if more than €1,500 came from the second or subsequent employers)
• You have rental income, investment returns, capital gains, or other income exceeding certain thresholds
• You receive a pension from outside Spain

For expats who have recently moved to Spain, or who have income from both Spain and their home country, the picture can be more complex. If in doubt, consult a gestor (tax administrator) or asesor fiscal (tax adviser) — ideally one with experience advising foreign residents.

This article is based on reporting from Expansión, published March 18, 2026, and information from the Agencia Tributaria. Dates and procedures are correct as of publication but subject to change. This article is for informational purposes only and does not constitute tax advice. For advice specific to your situation, consult a qualified tax adviser.