Spain Corporate Tax Changes 2026: Rates, Loss Relief Limits and Compliance Steps for Companies and Smes

Last reviewed: 17 May 2026

Corporate tax Spain rules changed materially when Royal Decree‑Law 16/2025 came into force, introducing phased rate reductions for micro‑companies and SMEs, tighter caps on loss carryforwards, and new documentation requirements enforced by the Agencia Tributaria. Whether you run a single‑entity sociedad limitada or manage a multinational group with a Spanish subsidiary, the 2026 tax changes 2026 Spain package demands immediate attention. This guide explains every element of the reform, provides worked numerical examples, and sets out an actionable compliance checklist so that general counsel, CFOs, accountants and SME owners can act before the next filing deadline.

Here is what this article covers:

• Exact corporate tax rates Spain for 2026, standard, reduced and special‑regime rates, with eligibility tests.
• Loss carryforward Spain caps, the new percentage limits, how they interact with group relief, and what documentation the Agencia Tributaria now expects.
• A step‑by‑step compliance checklist, filings, accounting entries, deadlines and restructuring options to minimise risk.

Overview of the 2026 Corporate Tax Package: What Changed

The Impuesto sobre Sociedades (Spanish corporate tax) framework was overhauled through a package of measures anchored in Royal Decree‑Law 16/2025, published in the Boletín Oficial del Estado (BOE). The decree introduced three interlocking reforms: a phased reduction in effective rates for qualifying micro‑companies and SMEs, stricter caps on the offset of carried‑forward tax losses, and expanded reporting obligations administered through the Agencia Tributaria’s electronic filing system.

These changes apply to tax periods beginning on or after 1 January 2026. Subsequent guidance issued by the Agencia Tributaria clarified turnover thresholds, documentation requirements, and the interaction of the new loss‑offset caps with the existing tax‑consolidation regime. For practitioners, the key instruments are:

• Royal Decree‑Law 16/2025 (BOE), primary legal text setting new rates, SME phased schedule, and loss‑offset caps.
• Agencia Tributaria guidance notes, administrative interpretation covering Modelo 200 filing adjustments, documentary evidence for reduced‑rate claims, and updated electronic forms.
• Ley 27/2014 (Corporate Income Tax Act), the underlying statute, as amended by RDL 16/2025.

What Are the Corporate Tax Rates in Spain in 2026?

The standard Spanish corporate tax rate remains 25 % for most resident companies. However, the 2026 package introduced meaningful reductions for smaller entities and preserved several special regimes that can lower the effective rate considerably. Understanding which rate applies, and how to document eligibility, is now the first compliance task for every Spanish company.

Who Qualifies for Each Rate

Eligibility for a reduced rate depends on entity type, turnover, and, for newly created companies, the number of profitable tax periods elapsed. The table below sets out the main corporate tax rates Spain entities face in 2026:

For micro‑companies, the phased reduction under Royal Decree‑Law 16/2025 operates on a split‑rate basis. The first €50,000 of the taxable base is taxed at a progressively lower rate across several fiscal years, with the 2026 rate set at 17 % on that tranche, while the remainder of the taxable base is taxed at 20 %. By way of illustration, a micro‑company with a €120,000 taxable base in FY 2026 would compute its corporate tax for SMEs Spain as follows: €50,000 × 17 % = €8,500, plus €70,000 × 20 % = €14,000, for a total liability of €22,500 (an effective rate of 18.75 %, compared with €30,000 at the standard 25 % rate).

Statutory Minimum Taxation Rules for Large Groups

Separately, large corporate groups and entities with net turnover exceeding €20 million remain subject to minimum effective taxation rules. These provisions, which pre‑date RDL 16/2025, ensure that after applying credits and deductions, the effective rate does not fall below 15 % of the taxable base (or 10 % for certain entities subject to special regimes). The 2026 package did not modify these minimum taxation thresholds, but the tighter loss‑offset caps (discussed below) increase their practical bite, particularly for groups with significant accumulated losses.

Loss Carryforwards and the New Limits: Practical Impact and Calculations

One of the most consequential elements of the 2026 corporate tax Spain reform is the tightening of loss carryforward rules. Before the reform, Spanish law already limited the amount of prior‑year losses (bases imponibles negativas) that could be offset against current‑year taxable income, particularly for large taxpayers. Royal Decree‑Law 16/2025 lowered these percentage caps further and introduced additional documentation requirements that the Agencia Tributaria will verify during audits.

How to Calculate Allowable Offset Under the New Cap

The revised framework operates as follows:

• Companies with net turnover below €20 million: may continue to offset carried‑forward losses against 70 % of the current period’s positive taxable base, with no monetary cap on the first €1 million of offset.
• Companies with net turnover between €20 million and €60 million: offset is capped at 50 % of the positive taxable base.
• Companies with net turnover exceeding €60 million: offset is capped at 25 % of the positive taxable base.

These caps are applied before the calculation of the minimum effective taxation rate. In practice, this means that a large group with €100 million of accumulated losses and €40 million of current‑year taxable income cannot offset more than €10 million in a single period (25 % × €40 million), stretching the utilisation of losses over multiple years and increasing the present value of tax payments.

Interaction with Tax Consolidation and Specific Carve‑Outs

For consolidated tax groups filing under the Spanish tax consolidation regime (régimen de consolidación fiscal), the loss‑offset cap applies at the group level, not entity by entity. This is a critical distinction: a group that generates losses in one subsidiary and profits in another must calculate the cap on a consolidated basis and apply the relevant turnover bracket to group‑wide net turnover. Industry observers expect this interaction to make group‑level tax planning more complex, since the aggregation of turnover across entities often pushes the group into the most restrictive 25 % bracket.

There are limited carve‑outs. Losses arising from insolvency proceedings and certain restructuring operations may still be offset without cap, provided the taxpayer can demonstrate that the losses arose directly from the restructuring and are documented with supporting judicial or notarial records. Companies seeking to rely on these exceptions should obtain professional advice, as the Agencia Tributaria has signalled that it will scrutinise such claims.

Required Documentation and Accounting Entries

Under the new rules, companies must maintain and be prepared to present:

• A detailed schedule of all carried‑forward loss pools, broken down by tax period of origin.
• Reconciliation between accounting losses and tax losses (bases imponibles negativas) for each period.
• Board minutes or management resolutions documenting the decision to offset losses in the current period.
• Supporting evidence for any carve‑out claim (insolvency orders, restructuring agreements, notarial certifications).

These records must be retained for the statutory limitation period (currently four years from the filing date of the return in which the offset is claimed, although the right to verify the origin of losses extends to earlier periods).

Immediate Compliance Steps for Companies: A Practical Checklist

Corporate tax compliance Spain demands a proactive response to the 2026 reforms. Waiting until the filing season to assess the impact is a significant risk, particularly for companies that have historically relied on large loss‑offset claims or that may now qualify for reduced SME rates. The following six‑step checklist addresses the most critical actions.

• Step 1, Assess rate eligibility. Review prior‑period net turnover against the micro‑company (below €1 million) and SME (below €10 million) thresholds. Confirm eligibility with certified turnover statements from audited accounts.
• Step 2, Reclassify entities if needed. If a subsidiary or branch has changed turnover bands (for example, crossing the €1 million micro‑company threshold), update internal classification and ensure the correct rate is applied in provisional payment calculations.
• Step 3, Audit and tag carried‑forward losses. Build or update the detailed schedule required by the Agencia Tributaria. Reconcile accounting and tax losses for each pool, identify pools that may expire, and model the offset available under the new caps.
• Step 4, Amend the accounting close and tax return process. Ensure that the financial close process captures the new fields in Modelo 200, including the SME rate election box and the loss‑offset disclosure schedule. Coordinate with external auditors.
• Step 5, Prepare supporting statements for the Agencia Tributaria. Assemble the documentation described in the loss carryforward section above: board minutes, turnover certifications, restructuring evidence. These should be ready for presentation during any verification or audit.
• Step 6, Review deadlines and consider voluntary disclosures. If prior returns applied rates or offset amounts that are now inconsistent with the Agencia’s interpretation, consider filing supplementary returns (declaración complementaria) before an inspection is initiated, which may reduce penalties and surcharges.

Recordkeeping and Documentation to Support Claims

The Agencia Tributaria’s post‑RDL guidance places particular emphasis on contemporaneous documentation. This means documents must be prepared at the time the tax position is taken, not created retroactively in response to an audit request. Companies should implement internal controls, ideally integrated into the monthly or quarterly close cycle, to capture turnover certifications, loss‑pool reconciliations, and rate‑election decisions as they arise. The likely practical effect will be an increase in audit activity focused on the transition period, making early preparation essential.

Practical Options for SMEs and Groups: Restructuring, Timing and Risks

Beyond compliance, the 2026 Spanish corporate tax reforms create planning opportunities, and traps, for SMEs and corporate groups. Early indications suggest that many companies are reviewing group structures, timing of profit recognition, and intra‑group pricing to optimise their position under the new rules.

When Restructuring Helps, and When It Creates More Tax Risk

Splitting activities across multiple entities to keep each below the €1 million micro‑company threshold is an obvious temptation. However, Spain’s general anti‑avoidance rule (cláusula antielusión, Article 15 of Ley 27/2014) and the specific substance requirements in Royal Decree‑Law 16/2025 mean that structures without genuine commercial purpose will be challenged. A restructuring is more defensible when it reflects operational logic, for example, separating genuinely distinct business lines with independent management, assets and customers.

Conversely, timing the recognition of income and expenses across fiscal years can be a legitimate tool. If a company expects to cross a turnover threshold, accelerating deductible expenses or deferring revenue (within the bounds of generally accepted accounting principles) may preserve eligibility for reduced rates in the current period.

Drafting Points for Intra‑Group Transactions

Transfer pricing scrutiny is expected to intensify under the new regime. Key drafting points include:

• Arm’s‑length pricing. Ensure all intercompany agreements reflect market terms and are supported by benchmarking studies.
• Substance over form. Each group entity claiming a reduced rate must demonstrate genuine economic substance, employees, premises, decision‑making authority, in its own jurisdiction.
• Management fees and royalties. Cross‑charges between group entities should be documented with service‑level agreements, time records, and cost‑allocation methodologies.
• Financing arrangements. Thin capitalisation and interest limitation rules continue to apply alongside the new corporate tax reforms; intercompany loans must be at arm’s‑length rates.

Industry observers expect the Agencia Tributaria to prioritise audits of companies that restructured in 2025 or early 2026, particularly where the restructuring resulted in multiple entities just below a turnover threshold.

Reporting Obligations, Key Dates and Who Must File What

Understanding corporate tax compliance Spain obligations requires mapping entity types to specific filing requirements and deadlines. The table below provides a consolidated view for FY 2026.

Companies should note that the Agencia Tributaria has updated Modelo 200 to include new mandatory fields relating to the loss‑offset cap and the SME rate election. Failing to complete these fields, or completing them incorrectly, may trigger an automated verification notice. All filings must be submitted through the Agencia’s electronic platform using a digital certificate or Cl@ve authentication.

Worked Examples and Short Modelling Guide for SMEs

Two brief examples illustrate the practical impact of the 2026 reforms on corporate tax for SMEs Spain.

These simplified calculations exclude deductions, credits and minimum‑taxation adjustments, which can alter the final liability. Companies should model their own position using actual figures and consult qualified advisers. A dedicated corporate tax calculator for Spain is a useful resource for running sensitivity analyses across different turnover and profit scenarios.

How Spain Compares in the EU

At 25 %, Spain’s standard corporate income tax rate sits above the EU average of approximately 21.3 %, according to data published by the Tax Foundation. However, the phased reductions for micro‑companies and SMEs bring effective rates closer to those available in jurisdictions such as Portugal (21 % standard, with lower rates for SMEs) and below the rates applied in France (25 %) and Germany (approximately 30 % including trade tax). The Canary Islands ZEC regime, at 4 %, remains one of the most competitive special regimes in Europe, though it is subject to EU state‑aid approval and stringent substance requirements.

Conclusion: Three Actions to Take Now on Corporate Tax Spain

The 2026 corporate tax Spain reforms are not a future concern, they apply to current tax periods and require immediate attention. To summarise, every company and SME operating in Spain should take three actions without delay:

1. Verify your rate eligibility. Confirm whether your entity qualifies as a micro‑company, SME, or standard taxpayer under the RDL 16/2025 thresholds, and ensure you have the certified documentation to support your classification.
2. Model your loss‑offset position. Apply the new percentage caps to your carried‑forward loss pools and assess how many years it will take to utilise accumulated losses. Adjust cash flow and tax‑provision forecasts accordingly.
3. Prepare for filing and audit. Update your Modelo 200 process, assemble contemporaneous documentation, and consider voluntary disclosures for any prior positions that may be inconsistent with the Agencia Tributaria’s current interpretation.

Companies with complex group structures, cross‑border operations, or significant accumulated losses should seek qualified corporate law advice early in the process. The Spain practice area at Global Law Experts connects businesses with specialists who can provide tailored guidance on every aspect of the 2026 reforms.

Sources

1. BOE, Royal Decree‑Law 16/2025
2. Agencia Tributaria, Corporation Tax (Impuesto sobre Sociedades)
3. PwC, Spain: Taxes on Corporate Income
4. Administracion.gob.es, General Corporate Tax Guidance
5. Welex, Corporate Tax in Spain: Rates and Progressive Reductions
6. Tax Foundation, Corporate Income Tax Rates in Europe
7. TradingEconomics, Spain Corporate Tax Rate