Guide
Pillar 3a deduction under withholding tax
Yes, a pillar 3a is deductible for someone taxed at source in Switzerland, but not in the scale the employer withholds. The deduction goes through a subsequent ordinary assessment: mandatory or on request for residents, and on request for a quasi-resident living abroad if the conditions are met. Without that procedure, no extra deduction is granted.
Why the deduction is not in the scale
The employer’s withholding is capped at flat professional expenses, insurance premiums and family charges. The tied-pension contribution is a separate deduction. It is not applied to the month’s salary. Since 1 January 2021 the federal tax administration requires a subsequent ordinary assessment, not a simple scale correction. Geneva described this on 13 March 2026.
Mandatory or on request
For people living in Switzerland, the assessment is mandatory from CHF 120,000 of gross employment income, or if there is income not taxed at source. One spouse is enough; the two salaries are not added together. It then continues until withholding tax ends. Without that trigger, the request is due by 31 March of the next year, and when leaving Switzerland with the departure return.
Quasi-resident
Someone living abroad can ask, each tax year, if at least 90% of the household’s worldwide gross income is taxable in Switzerland. The request is written and irrevocable for that year. It does not by itself create the status. French cross-border workers outside Geneva are often taxed in France on that salary, which lowers the Swiss share. Italy-agreement cross-border workers are excluded.
How much can be deducted
For 2026 the federal tax administration publishes 7,258 CHF with a 2nd pillar and 36,288 CHF without. A payment counts only if it is credited by 31 December of that year.
On 2 October 2026 the Federal Council set the amounts from 1 January 2027 at 7,373 and 36,864 CHF. They are the latest published ceilings. They do not apply to a 2026 payment.
Sources: withholding tax, 3a ceilings, Federal Direct Tax Act and OIS. Next: tax deductions, subsequent ordinary assessment, cross-border workers.
The request form stays in French. It asks for a first name, last name, email, phone and canton. It is free and does not commit you. Open the French form.
The wider frame is the Swiss third pillar.
Questions
Your questions, answered
The questions people ask before they request a comparison.
Is pillar 3a deductible under withholding tax?+−
Yes, for someone who lives in Switzerland and has paid in. The route is not the monthly scale. It is the subsequent ordinary assessment, mandatory or on request.
Why does net pay not fall after the payment?+−
The employer applies flat amounts, not the real contribution (Federal Direct Tax Act, art. 85). The effect shows in the assessment, which credits the tax already withheld.
From what income is the assessment mandatory?+−
From CHF 120,000 of gross employment income, or from income that is not taxed at source. For a couple, one spouse’s income is enough. Wealth thresholds depend on the canton.
What is the deadline for tax year 2026?+−
The payment must be credited by 31 December 2026. The assessment request is due by 31 March 2027, or with the departure return. The federal tax administration treats that date as a forfeiture deadline.
Can a cross-border worker always deduct pillar 3a in Switzerland?+−
No. The income must be taxable in Switzerland under the treaty, and the 90% test must be met, spouse included. Cross-border workers covered by the Switzerland–Italy agreement have been excluded since 1 January 2024.
Can the assessment raise the tax?+−
Yes. Withholding is credited without interest, then the balance is due or refunded. A filed request cannot be withdrawn.
Official sources
Official sources
- FSIO — The third pillar (article 7 OPP 3) — Small and large contributions. Pillar 3a buy-backs concern gaps from 2025. The first buy-back is possible in 2026.
- FSIO — Amounts valid on 1 January 2026 — OASI pensions, BVG thresholds and 2026 pillar 3a ceilings. Last editorial check: 6 octobre 2026.
- Federal Council — pillar 3a deduction from 1 January 2027 — Press release of 2 October 2026: 7,373 francs with a 2nd pillar, 36,864 francs at most without one. The 20% rate is unchanged.
- FSIO — Your third-pillar contribution — Maximum with a 2nd pillar, or 20% of income inside the limit without one. The credit counts on 31 December for the tax year.
- FTA — Circular 18a (taxation of pillar 3a) — Tax on capital at withdrawal, staggering, transfer to the 2nd pillar.
- FTA — Pillar 3b life policies that can be surrendered — Flexible provision is not one single tax story. A policy follows the contract and the canton.
- FSIO — OPP 3 change (beneficiaries) — The FSIO announced a wider choice of pillar 3a beneficiaries from 1 June 2027. The applicable detail is on that page, not in a ceiling figure.
- OASI/disability information centre — Pensions, the 13th old-age pension, reference age and the transitional generation.
Editorial review on 6 octobre 2026. Pillar 3a ceilings cited for 2026, from the FSIO table. From 1 January 2027 the Federal Council sets 7,373 francs with a 2nd pillar and 36,864 francs at most without one. The 20% rate is unchanged. Press release of 2 October 2026: https://www.admin.ch/fr/newnsb/BqB41FVYi5FB. Cantonal pillar 3b amounts can change from one tax notice to the next. This is not personal advice.