Pillar 3a and tax: from your first payment to retirement

Pillar 3a is the most popular tax deduction in Switzerland, and it earns that on the first year alone: every franc you pay in comes straight off your taxable income, up to around CHF 7'258 if you're in a pension fund. That's the half most people see. The other half runs for decades, from your first payment to the day the money comes back out, and the tax treatment stays generous almost the whole way.

The deduction is only the first of three advantages

For tax purposes, pillar 3a is a bucket the tax office mostly leaves alone. Money goes in before the tax on your income is worked out, so you're taxed on a smaller income. While it sits in the bucket it's shielded: the balance isn't part of your taxable wealth, and its growth isn't taxed as income year by year. The tax office takes its share exactly once, gently, on the way out.

Those are three separate advantages, and each one works on its own.

What you save now

Every franc up to the annual maximum comes off your taxable income, so what the deduction is actually worth to you depends on your marginal rate. The higher your income, the more the same contribution saves. For the 2025 tax year that maximum is around CHF 7'258 if you have a pension fund through your employer. Without one, as a self-employed person for example, you can pay in up to 20 % of your earned income, capped at around CHF 36'288.

Anna earns CHF 90'000 and pays the full CHF 7'258 into her pillar 3a. At a marginal rate of roughly 25 %, that's about CHF 1'800 less tax for the year. Do that in most of your working years and it adds up long before any investment growth enters the picture.

Worth checking: maximum amounts and tariffs get reset periodically, and they differ from canton to canton. The figures here are guide amounts for the years named. What counts for you is the maximum in force for your tax year, together with your own marginal rate.

The neighbour who never paid in

Two neighbours on the same salary. Anna pays into pillar 3a every year, Beat keeps the same money in an ordinary savings and investment account. Nothing dramatic happens in year one. The same salary just produces two different outcomes, and it happens again every year:

• Anna is taxed on a smaller income, because her contribution comes off first. Beat is taxed on all of his.
• Anna's 3a balance is invisible to the wealth tax, and its growth isn't taxed. Beat's savings sit in his taxable wealth, and the interest and dividends they throw off are taxable income.
• Anna's money compounds without that annual drag. Beat's compounds more slowly, because tax takes a slice on the way past.

Run that for twenty or thirty years and the gap gets wide. The one-time tax Anna pays when she finally takes the money out is, in most cases, far smaller than everything she saved and earned along the way. That's the quiet power of the bucket.

What happens at retirement

You normally take pillar 3a out within five years either side of the ordinary AHV retirement age, and if you keep working you can usually keep paying in and defer the payout.

When the money does come out, it isn't added to your other income for that year. It's taxed on its own, once, at a reduced pension tariff (the Vorsorgetarif), and depending on your canton, your municipality and the amount, that's typically a single-digit percentage up to around 10 %. That sits well below the rate you saved at when you paid in, which is where the whole advantage comes from. One practical detail decides how much you actually hand over: a 3a account can usually only be closed in one piece, not in slices. So several smaller 3a accounts, closed in different years, spread the total across tax years. The tariff climbs with the amount taken in any single year, so that staggering can lower the overall bill, depending on your situation.

A reform has been discussed at federal level that would tax larger capital withdrawals from the 2nd and 3rd pillars more heavily, possibly from around 2027. The details aren't settled, so the rules that count are the ones in force in the year you actually withdraw.

Using pillar 3a for your first home

You can also draw on pillar 3a early to buy a home you'll live in yourself, under the home-ownership rules (Wohneigentumsförderung, WEF), once every five years per 3a relationship. The moment you do, the money leaves the tax-protected bucket and the withdrawal gets taxed straight away, at the same reduced separate pension tariff rather than your ordinary income rate. In effect you're pulling forward the one-time tax you'd otherwise have paid at retirement.

This is the point that trips people up, and it's where the 3a parts company with the pension fund. With the pension fund, the 2nd pillar, an amount taken out for a home can be paid back, and you generally have to pay it back before you can make new tax-deductible buy-ins. So people assume the 3a works the same way, with a level they have to rebuild before the tax benefit returns. It doesn't. A pillar 3a advance withdrawal for housing can't be repaid into the 3a at all. Pillar 3a has had a buy-in since 2025, but it closes contribution gaps from earlier years rather than a withdrawal, so there's still nothing to restore here (how the buy-in works is covered in the pillar 3a buy-in). You simply keep making your normal annual contributions, up to the yearly maximum, from that point on. Your only lever is that annual maximum, and the withdrawal leaves it exactly where it was.

Timing is the other thing worth planning. If you draw from your pension fund and your pillar 3a in the same calendar year, or from several accounts at once, most cantons add the amounts together to work out the tax, which pushes you up the tariff. Spreading the withdrawals over different years can soften that one-time bill.

From document to deduction

TaxWize reads your pillar 3a contribution off your documents, files it under the right deduction, and shows what it does to your taxable income, so the saving is something you can see rather than something you take on trust. The long game, from your first payment to the payout, is still yours to plan, but the part that lands on this year's return is handled.

If you've already put a question like this to ChatGPT: TaxWize vs. ChatGPT shows where the two tools differ once there's a real return to file.