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

Pillar 3a is the most popular tax deduction in Switzerland, and for good reason. But most people only ever see half of it: the money they save on this year's tax bill. The full story runs for decades, from your first payment to the day you take the money out, and the tax treatment is generous at almost every step. Here is the whole picture, in plain language: what you save now, what your 3a grows into, how the payout is taxed at retirement, and what changes if you use it to buy a home.

Think of it as a tax-protected bucket

The simplest way to picture pillar 3a is a bucket the tax office mostly leaves alone.

Money goes into the bucket before the tax on your income is worked out, so you are taxed on a smaller income. While it sits in the bucket, it is shielded: the balance is not part of your taxable wealth, and its growth is not taxed as income year by year. It is taxed only once, gently, on the way out.

That is three advantages in one, and it is worth seeing them separately.

What you save now

Each franc you pay into pillar 3a, up to the annual maximum, comes off your taxable income. So the saving depends on your marginal tax rate: the higher your income, the more each franc of contribution is worth.

For the 2025 and 2026 tax years the maximum is around CHF 7'258 if you have a pension fund through your employer. If you have no pension fund, for example as a self-employed person, you can pay in up to 20 % of your earned income, capped at around CHF 36'288.

A worked example. Anna earns CHF 90'000 and pays the full CHF 7'258 into her pillar 3a. At a marginal rate of roughly 25 %, that lowers her tax bill by about CHF 1'800 for the year. Pay in most years and the saving stacks up well before you count any investment growth.

Worth checking: the maximum amount and the tariffs change over time and differ by canton. The figures here are guide amounts for the years named. Confirm the current maximum and your own marginal rate for your tax year before relying on them.

The neighbour who never paid in

Picture 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.

Three things separate them, every single year:

• Anna is taxed on a smaller income, because her contribution is deducted. Beat is taxed on all of his.
• Anna's 3a balance is invisible to the wealth tax, and its growth is not taxed. Beat's savings are part of his taxable wealth, and their interest and dividends are taxable income.
• Anna's money compounds without that yearly tax drag. Beat's compounds more slowly, because tax takes a slice along the way.

Over twenty or thirty years the gap becomes large. The one-time tax Anna eventually pays when she takes the money out is, in most cases, far smaller than everything she saved and earned along the way. That is the quiet power of the bucket.

What happens at retirement

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

When the money comes out, it is not added to your other income for that year. It is taxed on its own, once, at a reduced pension tariff (the Vorsorgetarif). Depending on your canton, your municipality and the amount, that is typically a single-digit percentage up to around 10 %. It is meaningfully lower than the rate you saved at when paying in, which is the heart of the advantage.

One practical move matters here. You can usually only close a 3a account in one piece, not in slices. So holding several smaller 3a accounts, and closing them in different years, spreads the amount across tax years. Because the tariff rises with the total taken in a single year, that staggering can lower the overall tax, depending on your situation.

Worth watching: 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 are not final, so it is worth confirming the rules that apply in the year you actually withdraw.

Using pillar 3a for your first home

You can also take pillar 3a out early to buy an owner-occupied home you live in yourself, under the home-ownership rules (Wohneigentumsförderung, WEF). This is possible once every five years per 3a relationship.

Two things change when you do.

First, the money leaves the tax-protected bucket. Second, the withdrawal is taxed now, at the same reduced separate pension tariff, rather than your ordinary income rate. In effect you bring forward the one-time tax you would otherwise have paid at retirement.

Here is the point that trips people up, and it is where the 3a differs sharply from the pension fund. With the pension fund (2nd pillar), an amount taken out for a home can be paid back, and you generally have to repay it before you can make new tax-deductible buy-ins again. People often assume the 3a works the same way, with a level you have to "rebuild" before the tax benefit returns. It does not. A pillar 3a advance withdrawal for housing cannot be repaid into the 3a at all. There is no buy-in and nothing to restore. 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 it is unchanged by the withdrawal.

One more thing worth knowing: if you withdraw from both your pension fund and your pillar 3a, or from several accounts, in the same calendar year, most cantons add the amounts together to work out the tax. That pushes you up the tariff. Spreading the withdrawals across different years can soften the one-time bill.

Where TaxWize helps

TaxWize picks up your pillar 3a contribution from your documents, puts it in the right deduction, and shows the effect on your taxable income, so you can see the saving rather than take it 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 for you.