3.3. Results obtained in accordance with other indicators established in previous years' Target Plans

The Objective Plans prior to 2018 included indicators referring to the results derived from fraud prevention and control actions. This term is used to measure the tax collection results of the Tax Agency's actions to combat fraud.

However, these indicators provide a measurement of the Agency's control activities on a cash basis (settlements collected regardless of the year in which the settlement was made, collected fees that had been reported in the fiscal year or in previous fiscal years, late settlements entered, as well as denial of requested refunds), and the overall amount may be conditioned by extraordinary results that are not very representative of the main activity of the Tax Agency, which will not adequately reflect the activity of the organization.

Furthermore, the goal of maximizing performance indicators for combating fraud may not be fully aligned with one of the core functions entrusted to the Tax Agency, namely, increasing revenue collection during the voluntary payment period. Although legislative measures have been adopted to increase self-assessed and paid taxes (eg. limitation of financial expenses, obligation to declare assets abroad, investment of the taxpayer in real estate transfers, among others), their effectiveness would be limited if the Tax Agency's subsequent behavior were passive.

Furthermore, the anti-fraud results indicators only reflect part of the effects of the Tax Agency's activity, with a time frame limited to a specific year, which can lead to an erroneous understanding of them as an incentive to obtain results in the short term to the detriment of carrying out preventive actions or checks of greater complexity and duration. This purely quantitative form of monitoring must therefore be overcome.

Tax revenues are conditioned by a series of external variables such as economic growth, the evolution of internal demand, the employment rate, inflation, regulatory changes, the rate of refunds, among others. Therefore, its evolution is not a sufficiently consistent indicator of the evolution of voluntary compliance, which makes it difficult to recognize that the actions carried out by the Tax Agency also have an impact on said evolution.

All of these issues, along with the increased focus on assistance and fraud prevention measures, as reflected in the 2024-2027 Strategic Plan, make it advisable to measure the Tax Agency's actions through other indicators. The indicator that most accurately reflects how tax behaviour evolves in our country is the one that compares the differential evolution of the aggregate tax bases with that of the reference macroeconomic magnitudes, since a constant line of action of the Tax Agency is to direct its actions towards the emergence and expansion of the tax bases.

Notwithstanding the foregoing, information is provided on the results obtained in 2024 in accordance with the anti-fraud performance indicators included in the Target Plans for years prior to 2018.

The Tax Agency's collection results in the prevention and fight against fraud reached a total amount of 18.928 billion euros in 2024, which represents an increase of 13.28% compared to the previous year.

In relation to this overall result, the efficiency index measures the amount collected from these anti-fraud actions for each euro spent by the Tax Agency. To calculate it, the following magnitudes are used:

The numerator includes, in millions of euros, the amount obtained through the fight against tax and customs fraud.
The denominator includes, in millions of euros, the amount of the annual budget of the Tax Agency, in terms of recognised obligations. That is, it covers the cost of all the functions performed by the Tax Agency, since they all contribute to fulfilling its mission of ensuring the correct application of the state tax and customs system.

According to the efficiency index, in 2024, for every euro spent at the Agency, €10.65 was raised in the fight against fraud, a figure slightly higher than the previous year.

Data and graphs related to this issue can be found in the Annex. Table 16. Efficiency index . (Annex).

The total amount is made up of two parts: "Results of the prevention and control of tax and customs fraud," which yielded €17.872 billion in 2024, and "Other results of the prevention and control of tax and customs fraud," with a result of €1.056 billion in the same period.