Many taxpayers pay more income tax than they owe simply because they're unaware of the deductions they're entitled to. Unlike reductions (which act on the taxable base), deductions are subtracted directly from the tax bill, so their effect tends to be more visible in the final result.
The most common national deductions
- Contributions to pension plans: reduce the general taxable base, within the annual limits set by law, which have been lowered in recent reforms for individual plans.
- Donations to nonprofit organizations: entitle you to a deduction on your tax bill, with percentages that increase the more recurring your donations to the same organization are over the years.
- Maternity: a deduction for working mothers with children under 3, compatible with the monthly advance payment.
- Large families or dependents with disabilities: specific deductions that can be claimed as a monthly advance payment or applied directly on the return.
- Investment in newly created businesses: a deduction for those who invest as partners in certain startups, subject to holding-period requirements.
Regional deductions: the part that varies the most
Each autonomous region in Spain has the power to set its own additional deductions, which creates enormous variety depending on where you're a tax resident. Some of the most common across different regions include:
- Deductions for renting your primary residence (especially for people under a certain age).
- Deductions for the birth or adoption of children.
- Deductions for education expenses (school supplies, language courses, nursery schools).
- Deductions for investment in renovating your primary residence or improving its energy efficiency.
- Deductions for caring for dependent family members.
Since these deductions change frequently and vary a lot from one region to another, it's worth checking each year which ones are in force in your specific region, as it's common for them to be updated or for new deductions to be created from one year to the next.
The primary residence deduction: a transitional regime
The national deduction for investing in a primary residence was eliminated for purchases made from January 1, 2013 onward, but it's kept in place, through a transitional regime, for those who already bought their primary residence before that date and were applying the deduction. If you bought your home before 2013, this is one of the deductions most worth double-checking that you aren't missing.
How to make sure you don't miss deductions
The most reliable way to avoid leaving deductions unclaimed is to review the Tax Agency's draft return line by line before confirming it, rather than accepting it as is. The draft automatically incorporates a lot of tax data, but it doesn't always include regional deductions that require the taxpayer to declare them explicitly.
Simulate your withholding before tax season
Our income tax calculator gives you an estimate of your withholding based on your personal situation, useful as a reference before reviewing in detail which specific deductions might apply to you in your region.