Spain Tax 2026: The Key Date You Need to Check Your Income Data

The Key Date: March 18, 2026

If you live in Spain and need to file a tax return for the 2025 fiscal year, there is one date to put in your diary right now: March 18, 2026. From that date, taxpayers can access their datos fiscales (fiscal data) through the Spanish Tax Agency (Agencia Tributaria) website or its mobile app.

This is the starting gun for the 2026 tax campaign. Checking your fiscal data early gives you time to spot errors, gather missing documents, and prepare a smooth submission before the rush begins.

Full 2026 Tax Campaign Timeline

The Spanish tax campaign runs from March to the end of June. Here are all the key dates you need to know:

Date	What Happens
March 18, 2026	Fiscal data (datos fiscales) becomes available online via Agencia Tributaria
April 8, 2026	Online tax return submissions open (Renta Web)
May 6, 2026	Phone assistance begins — appointments required
June 1, 2026	In-person appointments at tax offices start
June 25, 2026	Deadline for bank direct debit (domiciliación bancaria) payments
June 30, 2026	Final deadline to submit your tax return

Missing the June 30 deadline can result in late filing penalties, so it is worth acting well in advance — especially if you plan to use phone or in-person assistance, as appointments fill up quickly.

Who Has to File a Tax Return in Spain?

Not everyone in Spain is legally required to file, but many people choose to do so because the majority of returns result in a refund. According to official figures, around 65% of tax returns result in a refund — so even if you are not obliged to file, it may be worth your while.

Income Thresholds for 2025 Earnings

You are generally required to file if your 2025 income met any of the following conditions:

• €22,000 or more from a single employer
• €15,876 or more from multiple employers, or if you received unemployment benefits alongside employment income

There are additional filing obligations for income from rental properties, investments, self-employment, and capital gains. If you are unsure whether you need to file, consulting a gestor (tax advisor) is always recommended.

How to Access Your Fiscal Data

From March 18, you can view your fiscal data in two ways:

1. Online: Log in to the Agencia Tributaria website at agenciatributaria.es using your digital certificate, Cl@ve PIN, or DNI/NIE reference number
2. App: Download the official Agencia Tributaria app and access your data on mobile

Your fiscal data includes income reported by employers, banks, and other organisations to the tax authority. It is important to check this carefully — if anything is missing or incorrect, you should flag it before submitting your return.

What to Look for When You Check Your Data

When you review your fiscal information, pay particular attention to:

• Employment income: Make sure all income from all employers is correctly listed
• Bank interest and dividends: Check that returns on savings and investments are shown
• Mortgage deductions: If your mortgage pre-dates 2013, you may still be eligible for deductions
• Rental income: Ensure any rental income you received is included
• Pension income: Both Spanish and foreign pensions should appear if applicable
• Property data: Confirm that your registered address and property details are correct

Advice for Expats in Spain

For foreign residents — particularly in expat-heavy areas such as Málaga, Marbella, Alicante, Torrevieja, and the Costa Blanca — the tax campaign can be a stressful time. Demand for appointments at local tax offices is high, and slots are often gone within hours of opening.

Here is what expats should do:

• Check your fiscal data as soon as March 18 arrives — do not leave it until April
• Book phone or in-person appointments early — May 6 and June 1 are the opening dates, but popular slots disappear fast
• Consider using a gestor: A local tax advisor can file on your behalf and navigate any complexities around foreign income, pensions, or the Modelo 720 (overseas asset declaration)
• Check your NIE and bank details are up to date to avoid delays in receiving any refund

What Happens If You Owe Tax?

If your return shows you owe money to the tax authority, you have options:

• Pay in full by June 30, 2026
• Split the payment into two instalments: 60% by June 30 and the remaining 40% by November 5, 2026
• Set up a direct debit (domiciliación bancaria) before June 25 if you want the payment taken automatically

Key Takeaways

• March 18 is the date to check your 2025 fiscal data online
• Online submissions open on April 8
• The final deadline is June 30, 2026
• Filing thresholds are €22,000 (single employer) and €15,876 (multiple employers)
• Around 65% of returns result in a refund — it is often worth filing even if not required
• Expats should act early and consider professional help

This article is based on information available as of March 2026. Tax rules can change — always verify the latest details with the Agencia Tributaria or a qualified tax advisor.