What is the difference between the cantonal clearing house and the UFAS/BSV?

The cantonal compensation fund is a local administrative body that actually manages the tax registers and calculates the AVS annuities for the residents of the canton. UFAS (Federal Office of Social Insurance, in German BSV) is the federal body that defines the uniform calculation criteria, checks the correct application of the rules and ensures the uniformity of the system throughout Switzerland. Simply: UFAS/BSV sets the federal rules, the cantonal fund applies them in the territory.

How do contribution gaps affect my AVS income?

Each contribution gap (period in which AVS contributions have not been paid) reduces both the total number of years of contribution and the average income used in the calculation, resulting in a lower income. For example, 2 years of gap reduces the average rent by about 4%. The clearinghouse identifies all gaps in your record and communicates the specific impact on your annuity amount. It is possible to retroactively fill the gaps with voluntary payments before applying for retirement.

Can I claim supplementary benefits if my AVS annuity is insufficient?

Yes. If the AVS pension (possibly supplemented by LPP, third pillar, or other income) does not cover the minimum living allowance established by the canton, you are entitled to claim the supplementary benefits. They are welfare aid financed by general taxation, not social security benefits. They must be explicitly requested at the competent cantonal office, after verification of income and assets according to federal criteria. They are not automatic.

When and how should I submit the AVS annuity application?

The compensation fund automatically sends the documentation 3-4 months before reaching the reference age (64 years for men, 63 for women). You must return the completed and signed form at least 2 months before your desired retirement start date. The cashier will process the request and communicate the final amount of the annuity and the exact start date of disbursement (first of the following month).

Can I fill the contribution gaps before I retire?

Yes, it is a very common and often economically advantageous practice. You can retroactively pay voluntary contributions for gap periods before reaching the reference age, within the deadlines indicated by the cantonal fund (commonly communicated with the contribution account statement). The cashier provides an estimate of the monthly increase in income that would result from the full payment, allowing you to assess the cost-benefit ratio of the payment.

Calculation of AVS annuity and contribution gaps (cross-border guide)

Di Laura Bianchi · Published on 23 August 2026

Swiss cantonal administration office: compensation fund for AVS pension calculation

How the cantonal compensation fund works in the calculation of the AVS annuity, what contribution gaps reduce the amount and how the supplementary benefits fill the living minimum.

Context

In a nutshell

The cantonal compensation fund manages the calculation of the AVS annuity in the first Swiss pillar
Contribution gaps reduce the amount of the annuity in proportion to the missing months
Supplementary benefits guarantee coverage of the minimum living allowance when the income is insufficient
The application process starts 3-4 months before reaching retirement age

Key facts

What: Cantonal compensation fund in charge of calculating and paying the AVS annuity
When: Request for annuity 3-4 months before the reference age (64 years old men, 63 years old women)
Where: At the compensation fund of the canton of residence (Obvaldo or other)
Who: UFAS/BSV coordinates at federal level; cantonal coffers manage locally
Amount: Depends on contributions paid during the working career and contribution gaps
Duration: Minimum 1 year contribution to access the annuity; full career typically 44 years for men
Procedure: Documentation sent automatically; return of form required at least 2 months before the desired date

In the Swiss social security system, the first pillar (AVS) represents the basis of security in old age. Each canton has its own cantonal compensation fund in charge of managing the calculation of the AVS annuity for its residents. The fund collects and records contributions during the entire working career and, upon reaching the age of

Operational details

The calculation of the AVS pension follows well-defined steps at the federal level, even if materially carried out at the cantonal level. The amount of the annuity depends on two main factors: the number of years of contribution credited to the insurance account and the average coordinated income over the entire working career.

The system is progressive: it is not enough to have paid many contributions at all, but the continuity and duration of the contributory career counts. A worker who enters the labour market late will access a lower income than a colleague who started earlier, even if both have paid the same total amount of contributions during their employment. This federal mechanism encourages career continuity and favors those who access work at a young age. Similarly, the secondo pilastro (LPP/BVG) completes the social security coverage with mandatory payments from the employer.

The concrete impact of contribution gaps

A common scenario concerns job search periods between jobs. Even a few consecutive months of unemployment, if not covered by unemployment insurance, create a gap in the AVS tax register. Although a single 6-month gap has a seemingly modest impact, the accumulation of multiple gaps over the course of the career can reduce final performance by a significant percentage.

For example, if an insured person turns 44 years of contribution (instead of 45 years of a

Useful planning tools

To estimate your pension strategy, use the pension planner and the pillar 3 simulator.

Key points

How to request the AVS pension and check contributory gaps

The procedure for requesting the AVS pension begins about 3-4 months before reaching the reference age. The cantonal compensation fund sends automatically to the insured a complete package containing the request form, a detailed extract of the contributions account (where all identified gaps in the system are highlighted) and operational instructions.

Step-by-step procedure for requesting the pension:

1. Accurate verification of the extract: Check the document received from the cantonal fund in every detail to identify any gaps, unregistered contributions or discrepancies in the coordinated income. If you notice inconsistent data or missing contributions, contact the cantonal fund immediately to request a correction. This phase is critical because errors can permanently reduce the pension.

2. Evaluate the opportunity to fill gaps: Request the cantonal fund to project the monthly increase in pension that would result from paying voluntary contributions. Compare the total cost to be paid with the annual increase in pension and the number of years of life expectancy to retirement to evaluate whether it is worth it.

3. Complete and sign the request form: Return the signed form to the cantonal fund within the specified times (usually at least 2 months before the desired retirement date). Attach any payment for voluntary contributions if you decide to fill gaps.

4. Receive the communication and start of the pension: The cantonal fund will formally communicate the definitive amount of the pension, the exact date of commencement (first day of the month following the reference age) and the payment methods (usually through a bank account).

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Frequently Asked Questions

What is the difference between the cantonal clearing house and the UFAS/BSV?: The cantonal compensation fund is a local administrative body that actually manages the tax registers and calculates the AVS annuities for the residents of the canton. UFAS (Federal Office of Social Insurance, in German BSV) is the federal body that defines the uniform calculation criteria, checks the correct application of the rules and ensures the uniformity of the system throughout Switzerland. Simply: UFAS/BSV sets the federal rules, the cantonal fund applies them in the territory.
How do contribution gaps affect my AVS income?: Each contribution gap (period in which AVS contributions have not been paid) reduces both the total number of years of contribution and the average income used in the calculation, resulting in a lower income. For example, 2 years of gap reduces the average rent by about 4%. The clearinghouse identifies all gaps in your record and communicates the specific impact on your annuity amount. It is possible to retroactively fill the gaps with voluntary payments before applying for retirement.
Can I claim supplementary benefits if my AVS annuity is insufficient?: Yes. If the AVS pension (possibly supplemented by LPP, third pillar, or other income) does not cover the minimum living allowance established by the canton, you are entitled to claim the supplementary benefits. They are welfare aid financed by general taxation, not social security benefits. They must be explicitly requested at the competent cantonal office, after verification of income and assets according to federal criteria. They are not automatic.
When and how should I submit the AVS annuity application?: The compensation fund automatically sends the documentation 3-4 months before reaching the reference age (64 years for men, 63 for women). You must return the completed and signed form at least 2 months before your desired retirement start date. The cashier will process the request and communicate the final amount of the annuity and the exact start date of disbursement (first of the following month).
Can I fill the contribution gaps before I retire?: Yes, it is a very common and often economically advantageous practice. You can retroactively pay voluntary contributions for gap periods before reaching the reference age, within the deadlines indicated by the cantonal fund (commonly communicated with the contribution account statement). The cashier provides an estimate of the monthly increase in income that would result from the full payment, allowing you to assess the cost-benefit ratio of the payment.