A guide to corporate tax for companies operating in Spain in 2026
Last reviewed: July 2026
Area: Tax & business
Who this is for: directors, SMEs and newly created companies
Every year, as the financial year closes, thousands of directors and finance managers face the same questions: which tax rate applies to me, which expenses can I deduct, when do I have to file Form 200? And although the rules do not change dramatically from one year to the next, certain nuances do —reliefs, limits on offsetting prior-year losses, the criteria the Spanish Tax Agency applies in audits— and it pays to have them up to date before sitting down to calculate the return.
Corporate tax is not just an annual formality. It is a mirror of how the company’s accounts have been managed over the previous twelve months. A poorly adjusted accounting result, a relief applied without meeting the requirements, or a forgotten instalment payment can turn an apparently simple return into a source of tax risk.
That is why understanding the logic of the tax is what makes the difference between a calm tax year and one full of surprises. The sections below explain, in an orderly way, everything a company needs to know about corporate tax in Spain: from its legal nature to the most common mistakes SMEs make when calculating it, including the rates in force and the Form 200 deadlines.
There is no one-size-fits-all answer: this guide is written for directors, finance managers and newly created companies that want to understand the tax before facing the return, and also for those who already file every year but want to review whether they are making the most of the legal margin available.
What corporate tax is and who must file it
Corporate tax is a direct tax that charges the income obtained by companies and other legal entities resident in Spanish territory during the tax period, regardless of where that income was generated. It is governed by the Spanish Corporate Income Tax Act (Law 27/2014), developed by regulation through the Corporate Income Tax Regulation (Royal Decree 634/2015).
As a general rule, the following are required to file it:
- Commercial companies (limited liability companies, public limited companies, general and limited partnerships).
- Cooperatives and agricultural processing companies.
- Associations, foundations and institutions with their own legal personality, even if they do not carry out an economic activity.
- Civil-law partnerships with a commercial purpose.
- Investment funds, pension funds and other entities without legal personality to which the law grants taxpayer status.
An important nuance: the obligation to file corporate tax exists even if the entity has had no activity during the year or the result has been negative. Many dormant or newly incorporated companies wrongly assume that, because they generate no income, they have nothing to declare. That is not the case: filing Form 200 is mandatory, save for very narrowly defined exceptions (fully exempt entities under article 9.1 of the Act).
If your company is in any of these situations and you have doubts about your specific obligation, our corporate tax service page explains how we handle these cases.
Tax rates and tax reliefs
The applicable tax rate depends on the type of entity and its turnover. These are the brackets in force that every company should know before calculating its liability:
| Rate | Percentage | Who it applies to |
|---|---|---|
| General rate | 25% | Most commercial companies, unless a special regime applies. |
| Reduced rate | 23% | Prior-year turnover below EUR 1 million. |
| Protected cooperatives | 20% | Cooperative results, with separate rules for non-cooperative results. |
| Newly created entities | 15% | First period with a positive tax base, and the following one. |
A newly created entity can only claim this 15% rate provided the activity was not previously carried on under different ownership and the entity does not form part of a corporate group.
Beyond the rate itself, there are reliefs and deductions that can significantly reduce the final liability:
- R&D and technological innovation deduction, one of the most valuable and often underused by SMEs that do carry out activities eligible for it.
- Job-creation deduction, including specific reliefs for hiring people with disabilities.
- Investment deduction in film and audiovisual productions, series or live performances.
- Other sector-specific deductions subject to joint limits on the gross tax liability and to formal certification requirements (reasoned reports, eligible-expense documentation, and so on).
Applying these reliefs correctly requires knowing both the substantive and the formal requirements, since an error in the supporting documentation can lead to losing the tax benefit in a later audit. This is precisely one of the areas where well-designed corporate tax planning makes the difference between using the available legal margin and letting it slip away. You can see how we approach it in our corporate tax planning service.
Deadlines and Form 200
The corporate tax return is filed through Form 200, submitted via the electronic office of the Spanish Tax Agency. The general deadline is the 25 calendar days following the six months after the end of the tax period.
For companies whose financial year matches the calendar year (the most common case), this means that Form 200 must be filed between 1 and 25 July of the year following the year-end. In other words, the return for financial year 2025 is filed in July 2026, and so on.
It is also important to keep in mind the instalment payments on account, declared through Form 202 and paid at three points in the year:
Instalment payment calendar (Form 202)
- April: first instalment.
- October: second instalment.
- December: third instalment.
These payments are calculated either on the basis of the prior year’s liability or on the tax base for the current period, depending on the method chosen, and are later offset against the final liability on Form 200. Forgetting any of these payments —more common than it seems in companies without a structured tax calendar— triggers surcharges and late-payment interest that a simple planning of dates could have avoided.
The tax base: what can be deducted
The tax base for corporate tax does not, save in exceptional cases, match the accounting result. It starts from it, yes, but it is corrected through a series of off-book tax adjustments, both positive and negative, that align the accounting result with what the tax rules treat as taxable income.
Among the most common adjustments are:
- Expenses that are not tax-deductible, even if they have been recorded as an expense in the accounts: fines and penalties, non-qualifying donations, expenses arising from transactions with tax havens, and the excess of accounting depreciation over the maximum allowed for tax purposes.
- Temporary differences between the accounting and the tax treatment (for example, in provisions or in certain timing criteria).
- The offset of prior-year tax losses, which allows the current year’s positive tax base to be reduced with tax losses from previous years, although it is subject to percentage limits on the tax base before that offset, especially relevant for companies with higher turnover.
This is where much of the tax risk of a return tends to concentrate: each adjustment must be properly documented and justified, because it is the first thing the Spanish Tax Agency reviews in an audit. A poorly calculated tax base, whether by excess or by default, has different but equally costly consequences: overpaying needlessly reduces the company’s liquidity, and underpaying exposes the company to penalties and surcharges in the event of an adjustment.
Common mistakes when calculating it
Most of the problems that arise with corporate tax come not from bad faith or a strained reading of the rules, but from recurring technical errors that repeat year after year in companies of a similar size.
| Mistake | Consequence |
|---|---|
| Not distinguishing an accounting expense from a tax-deductible expense. | The most widespread error among SMEs without specialised tax advice. |
| Forgetting the instalment payments (Form 202) in April, October and December. | Generates late-payment interest that accumulates until it is regularised on Form 200. |
| Not documenting related-party transactions between the company and its shareholders, directors or group companies. | The Tax Agency reviews these with particular attention; a lack of justification can lead to valuation adjustments. |
| Misapplying the reduced rate for small-sized enterprises. | By miscalculating prior-year turnover or overlooking incompatibilities between special regimes. |
| Not formally certifying deductions (R&D, job creation, specific investments). | Can lead to losing the tax benefit entirely in an audit, even if the expense was eligible. |
| Miscalculating the offset of prior-year tax losses. | Exceeding the legal limits or applying them without checking the entity’s requirements. |
None of these mistakes is exclusive to small companies or complex structures: they appear both in single-shareholder companies and in groups with several subsidiaries, and their cost —in penalties, interest or lost tax benefits— is usually far higher than that of having had advice from the start of the year, not only at the moment of filing Form 200.
How GraciaCalbet can help you
At GraciaCalbet we have spent more than 45 years supporting companies and SMEs in managing their tax obligations, and corporate tax is one of the areas where a team that combines a legal and a tax perspective from the outset adds the most value.
Our work is not limited to calculating the liability and filing Form 200. We analyse each company’s situation throughout the year —not only at year-end— to identify applicable deductions and reliefs, to check that the tax adjustments are properly documented, and to plan the instalment payments so they do not create cash-flow surprises. It is this annual, rather than one-off, perspective that allows problems to be anticipated before they become tax contingencies.
If your company needs support with the corporate tax return, with reviewing applicable deductions or with broader corporate tax planning that integrates corporate tax with the rest of its tax obligations, each company has a different tax position, and an initial review is usually the most useful starting point to understand what room for improvement exists. You can tell us about your case through our contact form.
Frequently Asked Questions (FAQs)
Which companies are required to file corporate tax in Spain?+
All commercial companies, cooperatives, foundations, associations with legal personality and civil-law partnerships with a commercial purpose resident in Spain are required to file Form 200, regardless of whether they have carried out an economic activity or whether the year’s result is positive or negative. Only the fully exempt entities expressly listed in the Corporate Income Tax Act are excused from filing, a very limited set of cases.
When is corporate tax filed in 2026?+
As a general rule, Form 200 is filed within the 25 calendar days following the six months after the end of the tax period. For companies whose year matches the calendar year, this places filing between 1 and 25 July 2026, corresponding to the year closed on 31 December 2025.
What is the corporate tax rate in Spain?+
The general rate is 25%. There is a reduced rate of 23% for companies with turnover below one million euros in the previous year, a 20% rate for tax-protected cooperatives, and a 15% rate for newly created entities during the first period with a positive tax base and the following one.
How is corporate tax calculated?+
The calculation starts from the year’s accounting result, which is corrected through off-book tax adjustments (non-deductible expenses, temporary differences, offset of prior-year losses) to obtain the tax base. The relevant rate is applied to that base to obtain the gross liability, from which deductions, reliefs and instalment payments already made are subtracted.
What happens if I file corporate tax late?+
Failing to file, or filing Form 200 late, entails surcharges for late filing, calculated on the amount payable and increasing the greater the delay. If the Tax Agency has first formally requested the filing, in addition to the surcharges penalties may be imposed, even on companies with no amount to pay.
Which expenses are deductible in corporate tax?+
Accounting expenses are deductible when they meet the general requirements of being correlated with income, supported by documentation and allocated to the correct period, provided the tax rules do not expressly exclude them. Fines and penalties, non-qualifying donations, the excess of depreciation over the tax limit and expenses arising from transactions with tax havens fall outside.
Can I offset losses from previous years in corporate tax?+
Yes. Tax losses generated in previous years can be offset against the current year’s positive tax base. This offset is subject to percentage limits on the prior tax base, which vary according to the company’s volume of operations.
Are instalment payments on corporate tax mandatory?+
Yes, as a general rule all companies subject to corporate tax must make instalment payments on account through Form 202, in April, October and December. Not making them on time generates late-payment interest, even if the final tax return is neutral or results in a refund.
