A "buyback" in the Swiss pension context means paying money now for a benefit you should have earned earlier. In Pillar 2 (BVG), buy-ins have existed for decades, now the same concept applies to Pillar 3a.
The mechanics are simple: you identify a year where you were eligible to contribute to Pillar 3a but did not (or contributed less than the maximum). You then make a payment equal to the gap amount (up to that year's maximum limit). The payment counts as a tax deduction in the year you make it.
Key distinction from regular contributions
A regular Pillar 3a contribution fills the CURRENT year. A buyback fills a PAST year. But from a tax deduction perspective, both are deducted in the year of payment. The IRS... sorry, the Steuerverwaltung treats them identically on your tax return.
Practical workflow
- Check which years (2025+) you have gaps (your 3a provider or AHV-Ausweis can confirm)
- Calculate the gap amount (maximum limit for that year minus what you actually contributed)
- Transfer the buyback amount to your 3a account
- Declare it on your Steuererklärung as a Pillar 3a contribution
- Receive the tax refund
Stacking with Pensionskassen-Einkauf
You can make BOTH a Pillar 3a buyback AND a Pillar 2 (Pensionskassen) buy-in in the same year. They are independent tax deductions. Combined with your regular 3a contribution, a single year could see CHF 30,000-50,000 in tax-deductible pension contributions.
