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Solidarity Supplement for the Elderly (CSI) Calculator

How much Solidarity Supplement for the Elderly (CSI) could you receive? This calculator estimates the monthly CSI from your situation (living alone or as a couple) and your annual income. CSI is the difference between a reference value and your resources, divided by 12.

Enter your situation and annual income (for a couple, the two incomes are added). The calculator subtracts the resources from the reference value and divides by 12. Since June 2024, children’s income no longer counts. 2026 national figures.

CSI to receive per month
€370.00

How the CSI is reached

Reference value (annual)€8,040.00
Annual resources counted−€3,600.00
= Annual difference€4,440.00
= CSI to receive per month (÷ 12)€370.00

Educational estimate, not advice. It computes the benefit assuming you meet the access conditions (66+ and 6 years of residence); it does not decide entitlement, check the assets limit or apply Social Security’s exact income-counting rules. Confirm with Social Security.

Video: how to use the calculator

What CSI is and who can claim it

The Complemento Solidário para Idosos (CSI), or Solidarity Supplement for the Elderly, is a monthly benefit from Portugal’s Social Security for low-income pensioners, paid on top of the pension. It can be claimed by people aged 66 or over (the statutory old-age pension age) who reside legally in Portugal for at least 6 years and whose resources are below the reference value. This calculator estimates the benefit assuming you meet the access conditions.

How it is calculated

The monthly CSI is 1/12 of the difference between the annual reference value and your annual resources. As a formula: monthly CSI = (reference value − resources) ÷ 12. The resources counted are your own income and, for a couple, the spouse or partner’s income too. Since 1 June 2024 the children’s income no longer counts. If resources already equal or exceed the reference value, there is no supplement to pay.

The 2026 figures

In 2026 the CSI reference value is €8,040 a year (about €670 a month) for someone living alone and €14,070 a year for a couple, set by Portaria no. 480-D/2025/1. Someone with no income at all receives the maximum: €670 a month (single). CSI is national and is paid 12 times a year.

Worked example

Someone living alone with €3,600 of annual income (pensions and other): the annual CSI is €8,040 − €3,600 = €4,440, that is €4,440 ÷ 12 = €370 a month. With no income at all they would receive the maximum of €670 a month. With €8,040 or more of income they would not qualify. For a couple, the two incomes are added and the €14,070 reference value is used.

Frequently asked questions

What is the Solidarity Supplement for the Elderly (CSI)?
It is a cash benefit from Portugal’s Social Security paid on top of the pension of low-income pensioners, to guarantee a minimum level of income in old age. It is a solidarity (non-contributory) benefit: it does not depend on the contributions paid, but on current income.
What is the CSI amount in 2026?
The reference value in 2026 is €8,040 a year (about €670 a month) for someone living alone and €14,070 a year for a couple, set by Portaria no. 480-D/2025/1. That is the maximum: the CSI received is the difference between it and your resources, divided by 12.
How is the amount you receive calculated?
You subtract the annual resources from the annual reference value and divide by 12: monthly CSI = (reference value − resources) ÷ 12. The higher your own income, the lower the supplement. If resources reach the reference value, there is no supplement.
Does the children’s income count for CSI?
No. Since 1 June 2024 the children’s income no longer counts towards the award and calculation of CSI. Only your own income and, for a couple, the spouse or partner’s income are counted. This change widened the number of people entitled to the benefit.
Which resources count for CSI?
Your own income and, for a couple, the spouse’s income count: pensions, earned income, capital and property income. Social Security applies its own rules (some income counts differently) and there is an assets limit above which there is no entitlement. This calculator uses the resources you enter as a reference, so the real amount may differ.
Does this calculator decide whether I qualify for CSI?
No. It only estimates the benefit amount assuming you meet the access conditions (age, residence and resources below the limit). The decision on entitlement and the exact counting of income and assets are up to Social Security.

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Author: Thorben Rasmus Idel · Reviewed by: Nahar Geva · Last reviewed: 2026-06-10