Pillar 3a for expats: the easiest tax win in Switzerland
Pillar 3a is tax-deductible retirement saving - pay in up to about CHF 7,258 a year (as of 2025), cut your tax bill, and let it compound. Held as a fund rather than cash, it's one of the best-value moves an expat can make.
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What pillar 3a is
Pillar 3a is voluntary, tax-privileged private retirement saving - the third pillar of the Swiss system - where every franc you pay in reduces your taxable income.
Switzerland's retirement system rests on three pillars: state (AHV/IV), occupational pension (BVG), and private. Pillar 3a is the tax-privileged slice of the private layer - a personal account you fund yourself, with strict limits and generous tax treatment.
As of 2025, employees with a pension fund can contribute up to about CHF 7,258 a year. Self-employed people without a pension fund can pay up to 20% of net income, capped around CHF 36,288 - one of the biggest tax deductions available in the Swiss system.
The money is locked until about five years before retirement age. The main exceptions: buying your main home, leaving Switzerland permanently, or becoming self-employed. It works alongside your pension fund (2nd pillar) - not instead of it.
The two wins: tax and compounding
Pillar 3a pays you twice - a tax deduction now, and decades of compounding growth after.
The tax deduction is the immediate win: your contribution comes straight off your taxable income. Roughly, you save the contribution multiplied by your marginal tax rate. In many Swiss urban cantons that's around 25-35% for a typical expat salary - so a full CHF 7,258 contribution can save CHF 1,800-2,500 in tax the same year.
The second win is compounding. If the money sits as cash it earns almost nothing, and the tax deduction is the only real benefit. If it's invested in a fund, decades of compounded returns typically become far larger than the total contributions themselves.
The earlier and more consistently you pay in, the more both effects add up. Missing a year is a permanent miss - you can't back-fill 3a contributions the way you can with some other tax-advantaged accounts elsewhere.
Bank 3a vs fund 3a
For anything but the short term, a fund-based 3a usually far outperforms a cash 3a account.
A cash 3a account at a bank earns close to nothing at typical Swiss interest rates. It suits money you know you'll withdraw within a few years - to buy a home, say - where you can't afford market swings.
A fund-based 3a invests in equities and bonds. Expected long-term returns are much higher, at the price of more short-term volatility. Over 10-30 years the gap between a cash 3a and a low-fee equity 3a is typically measured in tens of thousands of francs.
A few things to watch:
- Fees - look at the total expense ratio (TER). Fintech 3a providers offer equity funds well below 0.5% p.a., which compounds into a big difference.
- Multiple 3a accounts - many expats open several 3a accounts and pay into them in rotation. At retirement you can withdraw them in different tax years and reduce the one-off withdrawal tax.
- Currency and allocation - a globally diversified equity strategy is usually preferable to CHF-only.
For the mechanics of building a global equity portfolio inside or outside 3a, see our ETF guide.
Expats: leaving, buying a home, and how to start
Pillar 3a still makes sense even if you might not stay in Switzerland forever.
When you leave Switzerland permanently, you can withdraw the balance. It's taxed once as a lump-sum withdrawal - often at a low rate that depends on the canton where the 3a foundation is domiciled, which can make a real difference in the final number.
You can also draw on pillar 3a to buy your main home in Switzerland, either as capital or to amortise a mortgage. That flexibility is one reason many expats build 3a in parallel with a house-purchase plan.
To get started, open a 3a with a bank, insurer or fintech. As a rule, prefer a flexible fund 3a over a 3a insurance policy (mixed life + savings) unless you fully understand the lock-in and the fee load; insurance-linked 3a is much harder to change or cancel.
US persons should get advice before choosing a fund 3a - US tax rules on non-US funds (PFIC) can make many otherwise excellent products complicated or punitive. A cash 3a plus dedicated US-friendly investing often works better. For the broader tax angle, see our tax optimisation guide.
How much would 3a save you?
Move the sliders to see the annual tax saved and how a fund-based 3a could grow over time.
You'd save about CHF 1'815/year in tax and build roughly CHF 195'025 over 20 years.
Indicative only, as of 2025 - actual tax saving depends on your canton and income.
Set up pillar 3a the smart way
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OpenPillar 3a - your questions, answered
What is pillar 3a?
It's voluntary, tax-deductible private retirement saving - the third pillar. You choose how much to pay in each year up to a legal maximum, and the amount is deducted from your taxable income.
How much can I pay into pillar 3a?
As of 2025, employees with a pension fund can contribute up to about CHF 7,258 a year. Self-employed people without a pension fund can pay up to 20% of income, capped around CHF 36,288.
Is pillar 3a worth it if I might leave Switzerland?
For most employed expats, yes. You get the tax deduction now and can withdraw the balance when you leave permanently - often at a low one-off tax rate. Starting early means more compounding even on a short stay.
Bank 3a or fund-based 3a?
For horizons beyond five to ten years, a fund-based 3a usually far outperforms a cash account earning almost nothing. A cash 3a makes sense mainly if you'll withdraw soon.
When can I withdraw pillar 3a?
Normally from about five years before retirement age. You can also withdraw earlier to buy your main home, when you leave Switzerland permanently, or if you start self-employment.
I'm a US person - is there a catch?
Possibly. US tax rules on foreign funds (PFIC) can make fund-based 3a complicated for US persons, so get advice before choosing a product.
Turn your tax bill into your retirement
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