Everything You Need to Know to Avoid Mistakes
The 2025 Income Tax Return campaign is now underway, and as every year, it brings doubts, last-minute rushes, and, in many cases, mistakes that can be costly. In this article, we clearly and practically explain everything you need to consider to file your tax return correctly and make the most of available deductions.
📅 Key Dates for the 2025 Tax Return
It’s essential to know the timeline to avoid penalties or surcharges:
- Start of online filing: April 8, 2026
- Start of telephone service: May 6, 2026
- Start of in-person assistance (by appointment): June 1, 2026
- Deadline for returns with direct debit payment: June 25, 2026
- Final deadline: June 30, 2026
👉 Tip: Don’t leave it to the last minute. Filing early allows you to spot and correct errors in time.
👤 Who Is Required to File?
Not all taxpayers are required to file a return. In general:
- If you earned more than €22,000 per year from a single employer
- If you had more than one employer and earned over €15,000
- If you received income from rentals, investments, or business activities
If in doubt, it’s best to review your draft return.
💡 Key Changes in 2025
This year brings several relevant updates:
- Adjustments to IRPF tax brackets in some autonomous communities
- New deductions related to energy efficiency
- Changes in the taxation of cryptocurrencies
- Increased control over income from digital platforms
🧾 Deductions You Shouldn’t Forget
One of the key ways to pay less tax is to carefully review deductions:
🏠 Housing and Home (Beyond the Basics)
- Main residence rental (old regime): still applicable if the contract predates 2015
- Energy-efficient home renovations:
- Reducing energy consumption
- Improving insulation or heating
- Installation of electric vehicle charging points at home
- Residence in specific areas (such as La Palma in certain years)
👉 These deductions are closely linked to sustainability and efficiency.
👶 Family and Personal Situation
- Birth or adoption of children (very relevant at regional level)
- Childcare or nursery expenses
- Large families or single-parent households
- Maternity deduction (up to €1,200)
- Care for dependent individuals
👉 Many of these depend on your autonomous community and can be combined.
💼 Employment and Professional Activity
- Union fees
- Mandatory professional association fees
- Legal defense expenses related to employment
- Deduction for low-income earners (up to ~€340)
👉 These are often overlooked and easy to apply.
📚 Education and Training
- School expenses (books, materials, etc.)
- Language courses or additional training (depending on region)
- Nursery expenses (especially in regional deductions)
💚 Health and Wellbeing (Increasingly Common)
New regional deductions may include:
- Gym expenses
- Specific medical treatments (e.g., rare diseases)
- Veterinary expenses for pets
- Glasses or eye care
👉 These types of deductions are growing significantly in 2025.
🌱 Investment and Savings
- Pension plans
- Investment in newly created companies (startups)
- Donations to NGOs or social organizations
- Protection of historical heritage
🚗 Mobility and Sustainability
- Purchase of an electric car
- Installation of charging points
👉 These are incentives aimed at the ecological transition.
📍 Regional Deductions (The Most Overlooked)
Each autonomous community has its own deductions, which may include:
- Rental support for young people
- Living in rural areas
- Household expenses
- Domestic help
- Eco-friendly donations
⚠️ Important: These are often NOT automatically included in the draft return and must be added manually.
👉 Reviewing these deductions can make a significant difference in your final result.
⚠️ Common Mistakes to Avoid
Many taxpayers make errors that are easy to prevent:
- Not reviewing the draft return
- Forgetting additional income
- Applying deductions incorrectly
- Not including personal changes (marital status, children, etc.)
💻 How to File Your Return Step by Step
- Access the Tax Agency portal
- Log in using Cl@ve, a digital certificate, or reference number
- Review your draft return
- Modify the data if necessary
- Confirm and submit your return
🧠 Conclusion
Filing your income tax return doesn’t have to be complicated if you stay informed and review every detail. Spending a bit of time can help you save money and avoid problems with the tax authorities.
If your tax situation is complex, consider consulting a professional advisor to help you optimize your return.