What changes since 2025
Until now, a “missed” 3a year was lost: impossible to catch up later. The reform in force since 2025 introduces the possibility of buying back certain missed 3a contributions after the fact, mirroring what already exists for the 2nd pillar. It's an opportunity for anyone who couldn't contribute the maximum in some years (early career, irregular income, periods abroad).
The exact terms (eligible years, amounts) are framed and may be adjusted. Have your eligibility checked before acting.
Who can buy back?
The buy-back is for people who, in one or more recent years, had income subject to AVS but didn't contribute to the 3a (or not the maximum). You must be able to contribute to the 3a in the year of the buy-back (so have eligible earned income) and meet the scheme's conditions. Cross-border workers and the self-employed may be concerned depending on their situation.
Conditions and ceilings
The buy-back is on top of your ordinary 3a contribution for the year. It covers the years when you could have contributed but didn't, within a limit set by the rules and over a framed number of past years. You must first have paid the current year's maximum before buying back an earlier year. The exact amounts depend on the ceilings applicable to each year concerned.
The tax advantage of the buy-back
Like a classic 3a contribution, the buy-back is deductible from your taxable income the year you make it. Used well, it can sharply cut your tax in a year when your income (and thus your marginal rate) is high — for example after a salary rise or a bonus. It's an extra tax reduction tool.
How to proceed
- Check the eligible years: identify those where you didn't contribute the maximum.
- Max out the current year first before buying back a past year.
- Document your AVS-liable income for the years concerned.
- Coordinate with your overall strategy (staggered withdrawals, other deductions).
The limits to know
The buy-back isn't open to everyone or uncapped: you need eligible income, must respect the order (current year first), and stay within the rules' limits. Like 3a capital, bought-back sums remain locked until retirement (save for release cases). A buy-back is only worthwhile as part of a coherent tax strategy.
The 3a buy-back is powerful but technical. We calculate your buy-back potential and the associated tax saving for free.
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