Corporate tax 2025 has become the procedure that determines the competitive advantage of Spanish companies. Those who master its new rates, deductions and obligations will gain margin, cash flow and peace of mind. However, the reform brings nuances that cannot be summed up in a simple headline. That is why we break down the essentials here, with a practical approach.
New corporate tax rates for 2025
The general rate remains at 25%, but everything below that has changed.
Micro-SMEs with a turnover of less than one million will be taxed at 21% on the first €50,000 of taxable income. For the rest, a rate of 22% applies, two points less than in 2024.
Medium-sized SMEs will see an intermediate step with a rate of 24%, while small entities will move to 20%.
Start-ups and newly created companies will maintain the 15% rate for the first four years of profitability, a key respite for early liquidity.
Meanwhile, the minimum rate of 15% for groups with sales exceeding twenty million remains in force. It is advisable to review deferred adjustments so as not to lose deductions.
The reduction for micro-SMEs will not stop in 2025. The government plans annual reductions until the first tranche reaches 17% and the rest 20% in 2027. Therefore, bringing forward profits to this financial year may be advantageous.
Consolidated tax groups must calculate their minimum tax on the sum of individual tax payments. It does not apply to the consolidated result, which may increase the tax if there are companies operating at a loss.
Corporate tax deductions and incentives
The deduction for R&D&I carries more weight than ever. It now covers the purchase of intangible assets developed by third parties, provided that the project has a report from the Ministry of Science. The Supreme Court has confirmed that this report is binding on the tax authorities and guarantees deductibility.
Green projects receive further support. The freedom to amortise renewable self-consumption installations up to five hundred thousand euros is maintained. In addition, accelerated amortisation is introduced for electric vehicles and charging points.
The capitalisation reserve is being strengthened. The reduction is now 20% of the increase in equity. It even reaches 30% if the average workforce grows by more than 10%.
Finally, the deduction for donations is increased from 35% to 40%. Ticking the ‘Solidarity Company’ box costs taxpayers nothing and multiplies the social impact.
The digital revolution also reaches corporate tax in 2025. A ten per cent tax credit is created for expenditure on advanced data analysis and cybersecurity software. This incentive is compatible with the innovation deduction and can be combined with accelerated depreciation of hardware.
The limitation on financial expenses remains anchored at 30% of EBITDA, but is relaxed for certified green infrastructure projects. In these cases, an additional threshold of five million is allowed, which, when calculated correctly, reduces the tax base without altering the debt ratio.
Formal obligations and strategy
The 2025 corporation tax return must be filed between 1 and 25 July, or 22 July if you pay by direct debit. Form 200 includes a section on beneficial ownership that requires the identification of the individuals who control the company.
Corrective self-assessments simplify the correction of errors. Simply submit a new Form 200 and calculate the interest yourself without waiting for a request.
In compensation for negative bases, the old brackets reappear. The general limit of 70% drops to 50% between twenty and sixty million in income and to 25% above that amount.
The 2025 corporation tax rewards early action. Those who combine smart investment with compliance control obtain real reductions and reduce risks.
Remember that the 2025 corporation tax interacts with the minimum supplementary tax approved by the OECD, which will be settled in 2026. Anticipating accounting adjustments this year will ease the global double tax burden of Pillar Two.