Income Tax Campaign 2025-2026: Fiscal survival guide and key dates

 

Just a few days left until one of the most important fiscal events in Spain's calendar begins. The Income Tax Campaign 2025-2026, corresponding to the previous year's tax return, already has confirmed official dates. Anticipating not only helps to avoid last-minute rushes but is also essential for properly managing complex asset situations or investments made during 2025.

Official Calendar: From April to June

The window to settle accounts with the Tax Office opens on April 8 and will definitively close on June 30, 2026. These are the dates you should highlight:

• April 8: Start of the campaign for online submissions (Renta Web and App).

• April 29: Opening of appointments for the "We Call You" plan (telephone assistance).

• May 6: Start of telephone tax return preparation.

• May 29: Opening of appointments for face-to-face assistance in offices.

• June 1: Start of face-to-face assistance in Tax Agency branches.

• June 25: Deadline if the result is to be paid and you wish to set up direct debit.

• June 30: End of the campaign.

Artificial Intelligence: Hacienda's new "eye"

The main novelty of this campaign is the consolidated integration of Artificial Intelligence (AI) in the Renta Web system. The Tax Agency not only uses these systems to assist taxpayers but also to monitor in real time:

1. Preventive alerts: If you modify key draft boxes, AI can issue warnings to confirm that the data is correct, detecting errors or "omissions" before submission.

2. Identification of obligated individuals: Predictive technology is used to identify citizens who, due to their income or investments (such as crypto assets or real estate), are required to file a tax return and have not yet done so, sending preventive notices.

3. Human supervision: Hacienda emphasizes that, although AI detects patterns, all final decisions and administrative actions have human oversight to ensure legal certainty.

Still waiting for your 2024 refund?

It is important to remember that the legal deadline for the tax authorities to issue a refund is six months after the previous campaign ends. If your refund has been delayed beyond that period, Hacienda is required to automatically include late payment interest in your favor.

Reviewing the draft is no longer an option, but a necessity, especially if you have had changes in your family situation, have carried out investment operations, or have had international mobility during 2025.