Key weeks remain for organize expenses, anticipate decisions, and take advantage of incentives These transactions only count if they occur before December 31st. What you do now will impact what you pay when it's time to file your income tax and corporate tax returns next year.
The following guidelines incorporate the technical recommendations of the Register of Tax Advisor Economists (REAF) and other common practices for pay what's fair without surprisesThe idea is simple: simulate, document, and execute on time.
What to do now: express diagnosis and plan
Spend half an hour doing a quick review: accumulated incomeDeductible expenses, investments, and withholdings. With this information, you can decide whether it's better to make advance payments or defer receipts.
Draw up a small plan with 10-day milestones: gather supporting documents, simulate personal income tax with and without contributions, execute transactions (donations, amortizations, redemptions) and archive everything in a digital file.
If you have an investment portfolio, review the results: selling unrealized losses This can help offset gains from 2025, always aligned with your financial strategy, and pay attention to the online stock market trading that affect your tax deadlines.
To avoid getting lost, leave a written message check list: invoices, work certifications, contracts and any document that supports deductions.
Pension and retirement plans
Contributions reduce the general tax base: up to 1.500 euros in individual plans and an additional 8.500 euros if they are from employment. If your salary is around 45.000 euros, receiving 1.500 euros before the end of the year could mean a saving of approximately 450 euros.
If you retired this year and are going to redeem the portion corresponding to contributions prior to 2007 You can benefit from a 40% reduction if the redemption is in the form of capital and is done within the legal deadlines (windows enabled between 2025 and 2027).
Anyone with a spouse whose income from work or activities is less than 8.000 euros may contribute up to 1.000 euros to the spouse's plan and reduce their own base. And for people with disabilities, the protected assets allow the base to be reduced to the current limits.
Payroll: withholdings, in-kind compensation and payments
If your income or family situation has changed, ask your company to adjust your rate. income tax withholding to avoid surprises during the tax season.
It values ​​receiving tax-exempt in-kind benefits before December 31 (such as childcare vouchers, food stamps, or health insurance when the company pays for it), which can ease the bill for the year.
If you are expecting bonuses, back pay, or compensation, agreeing to receive payment in January may be a good option. defer taxation and smooth out tax brackets. Anyone who has worked outside of Spain should review the exemption for income from work abroad (up to 60.100 euros if requirements are met).
Primary residence, mortgage and reinvestment
If you sold your house this year, you have two years to reinvest and maintain the exemption of the profit. Until you reinvest, you don't consolidate the taxation of that capital gain.
Those who purchased their primary residence before 2013 can prepay their mortgage to take advantage of the 15% deduction on a maximum annual basis of 9.040 euros per taxpayer.
Rentals: expenses, defaults and reductions
For income from real estate capital, collect and keep invoices from Property tax, community fees, insurance, repairs, amortization and other direct expenses. Without a complete invoice, the deduction is at risk in a tax audit.
If you're going to undertake a major renovation, you can divide the work into two invoices (December and January) to spread the expense over two years and not lose deductibility due to limits.
Non-payments can be recorded as doubtful balance If there is insolvency (bankruptcy proceedings) or six months have passed since the first attempt at collection; each monthly payment counts in the year in which the time requirement is met.
In housing contracts, the general reduction is 50% (60% in contracts prior to May 2023), with improvements of up to 90% in stressed areas if the rent is reduced by more than 5% compared to the previous contract, or by 70% in certain cases of first rental to young people.
If you manage multiple rentals, consider paying taxes as economic activity: just one full-time employee is enough to meet the requirement, which expands deductible expenses (salaries, social security, related supplies, management fees, etc.).
Capital gains and losses
It offsets capital gains and losses: if you accumulate gains, sell assets at a loss Before December 31st, you can reduce the savings base.
If you're going to sell at a profit and it's not urgent, postpone it until January 1st. taxation differs a year and a half. Avoid immediate repurchases of the same value if regulations prevent the loss from being applied.
It includes costs and fees in the calculation of transactions and retains extracts and supporting documents to sustain the compensations.
Donations with a direct impact on fees
Donations to entities that are part of the patronage system allow for a tax deduction. 80% of the first 250 euros And on the excess, you'll get 40% or 45% back if you remain loyal for three years with an equal or greater amount. Always keep receipts.
Electric mobility and energy efficiency
The purchase of an electric vehicle or the installation of a charging point entitles you to 15% deduction with limits. For vehicles, the maximum base is 20.000 euros (maximum savings of 3.000 euros) and there are price limits for the car to apply the incentive.
Example: if you buy a car for 32.000 euros, the deduction is capped at 3.000 euros up to a base limit of 20.000 euros. At charging points, the 15% discount is applied on a limited base (up to 4.000 euros), with a maximum saving of 600 euros.
In energy efficiency projects, review the technical requirements and certificationsSome deductions require specific reports and execution dates; explore financing options such as green mortgage.
Self-employed: order, evidence and box
Do not leave depreciation or provisions unrecorded. Review asset acquisitions and amortization tables Avoid losing deductions simply due to lack of a seat.
Simulate year-end installment payments for avoid treasury tensions in the fourth quarter and better adjust your provisions.
Those who pay taxes under the simplified tax regime must monitor their income and purchase amounts: the extension of extraordinary limits requires regulation, and if it is not approved, ordinary limits will return in the indicated period.
Companies: Useful Moves in Companies
To provide the capitalization reserve It reduces the taxable base and the incentive has been strengthened; remember the equity maintenance requirement; review your operating budget.
For small businesses, advancing expenses and deferring sales can be efficient with lower temporary rates; check if it's worth it for you not to exceed certain turnover thresholds.
The freedom of amortization For electric vehicles and charging points acquired during the fiscal year, it allows for accelerated tax expenditures. It also reviews the 1% limit on customer service expenses based on revenue.
Manages impairments judiciously due to uncollectible debtsProrations if the period was less than 12 months, and adjustments for non-deductible expenses (fines, penalties, surcharges) to avoid subsequent regularizations.
Operational checklist and calendar in 10 days
Days 1–2: gather income, expenses and supporting documents; create a digital folder with everything organized.
Days 3–4: simulate income tax and, if applicable, CompaniesIt compares scenarios with and without contributions/donations and with different sales.
Days 5–6: execute key moves (pension contributions, donations, mortgage amortization, adjusting withholdings, selling losses).
Days 7–8: Download certificates (plans, donations, works, recharging points) and review the conditions of each deduction.
Days 9–10: final review and checklistSchedule reminders for due dates and close pending matters with your advisor.
Regional tax deductions and rent: useful tips
Several communities are planning incentives if you put vacant properties up for rent or meet certain conditions. Canary Islands and Madrid There are fixed deductions for housing with requirements; Cantabria and Galicia contemplate amounts per property, and Extremadura allows deduction of up to 100% of the reduced net income with limits.
At Valencian Community There is a percentage on the total income from leases initiated if the rent does not exceed the reference price; the Balearic Islands allow, under certain conditions, the deduction of part of the landlord's expenses when the apartment had not been rented for two years.
Always check the regulations in your community (daycare, rental, elderly care, school supplies, housing and energy efficiencyDeductions are lost if the requirements and deadlines are not met.
Common risks and how to avoid them
Avoid keeping loose tickets: ask complete invoices Without NIF, concept and date or the Tax Office will not accept the expense.
Don't move money around just for taxes if it breaks your strategy: the taxation should serve to the financial plan, not the other way around.
Don't leave it until the last day: preparing in November gives you more time. margin for correction and document it calmly.
Technical context to monitor
The REAF points out that many amounts of IRPF (minimums, exempt limits or allowance amounts) They haven't been updated in a while.Therefore, inflation's real effect is diminished if these regulations are not reviewed. It is advisable to monitor any potential regulatory changes that may affect 2026.
Anyone who sets aside some time now to simulate, adjust and document He reaches the end of the year with his homework done: less income tax and corporate tax, fewer surprises in the spring, and more control over his money.
