Pillar 3a and cross-border workers: who can really deduct their payments?

Pillar 3a is presented everywhere as the Swiss employee's first tax lever: every franc paid in, up to the ceiling, reduces taxable income. For a cross-border worker, this promise holds in one specific case only. The right to open a 3a account is acquired with the first Swiss salary; the right to deduct the payments depends on the country that taxes that salary, the canton of employment and the spouse's income. This guide separates the two, situation by situation, and shows what happens at the time of withdrawal.

1. Can a cross-border worker open a pillar 3a?

Yes. Only people who receive income from a gainful activity subject to the AVS (old-age and survivors' insurance) can take out a tied pension contract, and that is the case for every cross-border worker employed by an employer in Switzerland. The Federal Tax Administration says so plainly in its circular on pillar 3a, in force since 1 January 2026: cross-border workers domiciled abroad can also build up a pillar 3a, whether or not they can deduct their contributions in Switzerland.

Three practical rules complete these ceilings:

• The payment must be credited to the account by 31 December at the latest to count for the year, the Federal Social Insurance Office points out.
• Several accounts are possible, with several banks or insurers, as long as the annual total does not exceed the ceiling. No federal limit sets their number. An existing account cannot, however, be split afterwards.
• Payments stop with gainful activity: as soon as employment in Switzerland ends, the foundation or insurer can no longer accept contributions. In the year the activity ends, the full contribution is still allowed.

2. Why does the right to contribute not give the right to deduct?

Because a cross-border worker's withholding tax leaves no room for individual deductions. The scale applied by the employer includes, as flat-rate amounts, professional expenses and compulsory contributions (AVS, pension fund, insurance); pillar 3a is not among them. The Federal Tax Administration's circular specifies that the calculation of the withholding tax scale does not take account of individual deductions such as contributions to pillar 3a.

And without any action, this tax is final. Article 99 of the Federal Act on Direct Federal Taxation states it in one sentence: no additional subsequent deduction is granted. The only way out is the subsequent ordinary assessment (TOU), which replaces the flat-rate withholding with a genuine tax return with its deductions. It is open only to certain cross-border workers.

3. Who can deduct, depending on the country of residence and the canton of employment?

The answer depends first on the tax agreement that applies to the salary. The table summarises the most common situations.

Resident of France employed in the eight cantons of the 1983 agreement

This is the most counter-intuitive case. A cross-border worker who works in Lausanne, Neuchâtel or Basel and returns to France every evening is taxed on their salary in France, on presentation of the 2041-AS certificate of residence (a French tax form). Switzerland levies no tax on this salary: there is therefore nothing from which to deduct pillar 3a. And France does not take over: French tax doctrine allows the deduction of contributions paid to the compulsory schemes for retirement and pension provision of the country of employment; pillar 3a, which is optional, is not one of them, and the 2047-SUISSE return (the French tax return for income received from Switzerland) provides lines for the AVS, the compulsory 2nd pillar and its buy-ins or LAMal (Swiss compulsory health insurance), but none for pillar 3a. For this cross-border worker, a 3a payment reduces tax in neither of the two countries. The tax status of these cross-border workers is covered in our guide to non-return days.

Resident of Germany: a flat-rate withholding of 4.5%

The German-Swiss convention limits Swiss tax to a withholding of 4.5% of gross salary, which Germany credits against its own tax. The Zurich tax administration describes this withholding as a fixed flat-rate tax which cannot, in principle, be reduced. As the salary falls under German taxation, the cross-border worker cannot, in practice, reach the threshold of 90% of income taxable in Switzerland that the TOU requires; moreover, no Swiss text expressly deals with pillar 3a for cross-border workers resident in Germany. The question of deduction therefore arises on the German side, and the answer should be sought from the Finanzamt (the German tax office).

Resident of Italy: a TOU expressly excluded

The agreement of 23 December 2020 on the taxation of cross-border workers provides that taxation in the state of employment takes the form of withholding tax and that any other method is excluded. The federal ordinance on withholding tax reflects this: these cross-border workers cannot be subject to a subsequent ordinary assessment. The Federal Tax Administration and the canton of Ticino confirm it. Withholding tax is final, and pillar 3a is not deductible in Switzerland. Our guide to cross-border workers' taxes details this regime and the distinction between existing and new cross-border workers.

4. The quasi-resident TOU: how do you obtain the deduction?

For a cross-border worker taxed at source outside the cases above, typically a resident of France employed in Geneva, deducting pillar 3a requires the subsequent ordinary assessment provided for in article 99a of the Federal Act on Direct Federal Taxation. The Geneva tax administration spells it out: to deduct your contributions to pillar 3a, you must have quasi-resident status and apply for a TOU.

The conditions

• At least 90% of worldwide gross income taxable in Switzerland, including that of the spouse. A spouse's salary received in France, rent collected in Haute-Savoie or income from French investments enter into the calculation and may be enough to make the test fail.
• A written application by 31 March of the following year at the latest, filed with the tax administration of the canton of employment; in Geneva, using the DRIS/TOU form. The deadline cannot be extended.
• An application that cannot be withdrawn once filed, even if the assessment turns out less favourable than withholding tax.
• An application to be renewed every year. For a non-resident, the TOU applies to a single tax period only; only residents of Switzerland taxed at source then remain under ordinary assessment automatically.
• A representative or an address for service in Switzerland, which the administration may require of a taxpayer domiciled abroad.

The downside of the TOU

Ordinary assessment does not simply add pillar 3a to the flat-rate amounts: it recalculates the whole tax, with a rate that takes account of all the household's income, and credits the tax already withheld at source. The Geneva tax administration warns that additional tax is possible, and advises making voluntary payments during the year in anticipation. A rental property in France, for example, can push the rate up to the point of cancelling out the gain from pillar 3a. A simulation before filing is essential, since the application can no longer be withdrawn. Our feature on quasi-resident status details the 90% calculation, and our guide to correcting withholding tax in Geneva explains the difference with the DRIS (request to correct withholding tax), which has not allowed pillar 3a contributions to be deducted since 2021.

5. Can missed years be bought back?

Since 1 January 2025, the ordinance on tied individual pension provision has allowed years in which the maximum contribution was not paid to be made up through a buy-in. No provision excludes cross-border workers. The conditions are strict:

• Having received income subject to the AVS in the year to be made up, and confirming this in writing to the foundation or insurer.
• Paying the maximum contribution in the year of the buy-in, i.e. 7,258 francs in 2026 for an employee affiliated with a pension fund.
• Not exceeding, per buy-in year, the amount of the small contribution: 7,258 francs in 2026, and 7,373 francs in 2027.
• Only gaps arising from 2025 onwards can be made up, within the limit of the ten years preceding the buy-in. The first buy-ins are therefore possible in 2026, for the year 2025.
• No more buy-ins after a first withdrawal of retirement benefits.

For a cross-border worker, the tax logic remains that of the ordinary payment: the buy-in reduces Swiss tax only if a TOU is obtained for the year of the buy-in. For a cross-border worker in the eight cantons of the 1983 agreement, it reduces tax nowhere. Buying into the 2nd pillar, which follows other rules, is covered in our guide to LPP buy-ins.

6. How is the withdrawal taxed?

Pillar 3a assets can be withdrawn at the earliest five years before the AVS reference age, and at the latest five years after it if gainful activity continues, i.e. between 60 and 70 for a reference age of 65. Early withdrawal is possible in the event of a full disability pension, the purchase of your own home, starting self-employment in Switzerland or leaving Switzerland permanently. A partial withdrawal closes the account concerned: to stagger withdrawals over several years, you must have paid into several accounts, an existing account not being divisible.

In Switzerland: withholding tax is always levied

Capital paid to a person domiciled abroad is subject to withholding tax, and the Federal Tax Administration's circular points out that a withdrawal from pillar 3a is always taxed, whether or not the contributions were deducted. The federal share, calculated on a scale specific to lump-sum benefits, ranges from 0% up to 25,000 francs to a maximum of 2.60% (between 150,000 and 750,000 francs), for a single person; to this is added the share of the canton where the foundation has its registered office. This tax can be refunded in full, without interest, on an application filed within three years of the payment, with a certificate from the tax authority of the country of residence. Where France taxes only part of the capital, as would presumably be the case for the eight cantons (see below), the refund might be only partial: the Franco-Swiss convention allows Switzerland to tax the portion that France does not tax. No official text expressly deals with this case.

In France: a regime that depends on whether the payments were deductible

The Bulletin officiel des finances publiques (BOFiP, the official body of French tax doctrine) distinguishes two cases. It taxes under the regime for non-deductible contributions those 3a accounts whose contributions were deductible neither in Switzerland nor in France: only the portion representing accrued earnings is taxable, as investment income, with social levies. This is presumably the situation of a cross-border worker in the eight cantons of the 1983 agreement, but no paragraph expressly covers their case: have it confirmed by your tax office. Where the canton of taxation allows the deduction, this regime does not apply: the capital presumably falls under the pension regime, with a possible option for taxation at 7.5% after a 10% allowance, if the capital is paid in a single instalment. The situation of a Geneva cross-border worker who has never obtained a TOU is not dealt with specifically by the Bulletin officiel: have it confirmed by your tax office before the withdrawal.

For a resident of Italy, the Agenzia delle Entrate (the Italian Revenue Agency) took the view, in a ruling given to a taxpayer, that the capital of a pillar 3a paid in one go falls under the “tassazione separata” (separate taxation) of pensions. For a resident of Germany, the treatment of the capital is a matter for the Finanzamt.

7. Without a deduction, what is left to weigh up?

For a cross-border worker who cannot deduct anything, pillar 3a loses the advantage on which its reputation rests. It keeps other features, which cut both ways:

• The money is locked in until five years before the reference age, except in cases of early withdrawal, and the case of a cross-border worker's end of employment is not settled by the federal texts.
• The withdrawal is taxed in Switzerland at source, with a refund that requires a procedure and, for France and Italy, taxation in the country of residence.
• For a resident of France in the eight cantons, whose payments were deducted nowhere, only the earnings would be taxed in France on withdrawal, subject to confirmation by the French tax authorities; the Swiss tax might then be only partly refunded.
• The savings remain in francs until withdrawal, which exposes their euro equivalent to exchange rate movements, in either direction.

The choice depends on each person's horizon, their other investments and their tax situation at the time of withdrawal. This guide describes the rules; it does not replace personalised advice. Our overview of the three-pillar system places pillar 3a in relation to the AVS and the pension fund, and our guide to cross-border workers' tax deductions reviews the other items.

8. Payments in francs, retirement in euros: how to plan ahead?

Pillar 3a payments are made in francs, and the capital is paid out in francs on withdrawal. For a cross-border worker whose day-to-day life is in euros, this means two moments of exchange: on payment, if the savings come from a euro account, and on withdrawal, when the capital has to reach that account. A withdrawal in one go concentrates several years of savings into a single conversion, at a rate that nobody chooses in advance.

For francs to be brought back to the euro account, a Swiss transit IBAN in your own name lets you receive and convert them; in manual mode, the timing of the exchange is chosen within 30 days. ibani is a Swiss financial intermediary based in Geneva, not a bank: it converts at the real market rate, plus a margin of 0.40% to 0.15% depending on the amount. The day's rate can be followed on our CHF-EUR converter, and our cross-border worker service page presents the offer.

9. Frequently asked questions