Starting January 1, 2026, a significant modification to the calculation of the retirement pension base will take effect in Spain. This reform is part of measures aimed at strengthening the contributory nature and sustainability of the public pension system.
The change introduces a dual calculation system, which will coexist for several years and allow the most favorable method for the worker to be applied at the time of retirement.
A Dual System for Pension Calculation
From 2026, there will be two possible methods to calculate the retirement pension base:
1. Current system
- Based on the contribution bases of the last 25 years.
2. New extended system
- Based on the contribution bases of the last 29 years.
- Within this period, it will be possible to exclude the 2 years with the lowest contributions.
During the transitional period, the most favorable calculation for the worker will be applied automatically.
Transitional Period: 2026 – 2043
The reform includes a gradual adaptation period from 2026 to 2043.
During these years:
- Both calculation systems will coexist.
- The Social Security administration will automatically apply the method that results in a higher pension.
- The number of months considered for the calculation will gradually increase.
This mechanism acts as a safeguard clause, aimed at preventing immediate negative effects on future retirees.
Gradual Implementation of the New System
The regulation establishes a step-by-step implementation:
- Starting in 2026, the new calculation model begins.
- From 2027, the extended system will apply generally.
- The calculation will consider the 324 best contribution bases of the last 29 years.
This system allows excluding the periods of lowest contributions that could negatively affect the pension calculation.
End of the Dual System in 2044
The dual system will be completely discontinued in 2044.
From that point on:
- Calculations will be based exclusively on the last 29 years of contributions.
- The 2 years with the lowest contributions can still be excluded within that period.
How Will This Reform Affect Future Pensions?
During the transitional period (2026–2043), applying the most favorable calculation largely neutralizes potential negative effects of the reform.
However, when the single system is fully in effect:
- Workers with very stable careers and increasing salaries may receive slightly lower pensions compared to the previous 25-year calculation system.
On the other hand, the new model benefits those with irregular contribution periods, as it allows the worst years to be excluded.
Conclusion
The reform introduces a more flexible pension calculation model, allowing for the most favorable system to apply for nearly two decades.
In the long term, the system moves toward a broader contribution period, aiming to improve the sustainability of the public pension system.
Given these changes, it is recommended to plan retirement in advance and analyze how career progression may impact the final pension calculation.