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Taxation ES · 2026

How to prepare for a Treasury inspection in 2026 and reduce tax risks

The 2026 tax control plan defines who the Treasury inspects. Discover the tax risks and how to prepare strategically.

Saúl Hidalgo

The 2026 Tax Control Plan sets the priorities of the Tax Agency and defines which profiles it will inspect with greater intensity. Understanding these criteria is key to anticipating and reducing fiscal risks.

The Tax Agency reinforces its strategy with a clear focus: more data, more automation and greater capacity to detect inconsistencies. The objective is no longer just to detect obvious fraud, but to identify situations where the information does not fit.

In this context, entrepreneurs, self-employed workers and investors must pay special attention to how they are structuring their activity.

What the Treasury monitors in 2026

The digital economy is one of the main focuses. The Treasury intensifies control over income generated on platforms, e-commerce and online activity, especially when there is no correct declaration.

The real estate sector remains under supervision. Undeclared rents, operations through companies and valuations that do not reflect the reality of the market are analyzed.

The self-employed and SMEs continue to be a relevant profile, especially when they present:

Control is also reinforced over companies without real activity or used personally, as well as structures that seek to artificially reduce the tax burden.

In the case of large assets, the level of surveillance is higher. International structures, tax planning and possible differences between declared income and standard of living are analyzed.

Multinationals and related operations are also part of the focus, especially in matters of transfer pricing and international tax planning.

How the Treasury detects tax irregularities

The current system is based on massive data analysis and process automation.

The cross-referencing of information makes it possible to compare banking data, billing, economic activity and financial behavior in real time. When there are inconsistencies, the system automatically generates alerts.

The exchange of international information reinforces this control. The Treasury has access to accounts, assets and operations abroad, which significantly reduces fiscal opacity.

One of the most determining criteria is the relationship between consumption and declared income. If the standard of living does not match the declared economic capacity, the system detects it.

Profiles with highest risk in 2026

Not all taxpayers have the same level of exposure. The profiles with the highest risk of inspection this year are:

How to prepare for a Treasury inspection in 2026

Preparation can no longer be reactive. Anticipating is the only way to reduce risks.

Fiscal coherence is the central element. It is not just about declaring income, but about making the entire economic structure make sense from the Administration's point of view.

Having an adequate structure is key, especially in cases of investment or international activity. Corporate and tax decisions must respond to a real and sustainable logic.

Tax planning remains a valid tool, as long as it is well structured. Improvised solutions or solutions without an economic basis are one of the main sources of risk.

Avoiding "patches" is essential in an environment where data is crossed automatically and any inconsistency ends up being detected.

Conclusion

In an environment where the Treasury cross-checks data automatically, the risk is not in making obvious errors. It is in maintaining structures that do not resist a complete analysis.

Entrepreneurs, investors and profiles with international activity are today the main focus of control.

Reviewing your tax situation before an inspection is no longer a tactical option. It is a strategic decision.

If you have operations, assets or structures outside of Spain, it is time to analyze if everything is correctly aligned.

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