Start with the payslip
The Federal Social Insurance Office links pillar 3a contributions to earned income subject to Swiss OASI. For young people in employment, OASI contributions generally begin on 1 January of the year they turn 18. That date is not the contract signature or necessarily the birthday itself. Separate the first year with eligible earnings from the provider's account-opening conditions. If the apprentice is still a minor when that year begins, ask the provider what documentation and signatures it requires.
An apprenticeship spanning two tax years
Assume an apprenticeship starts in August 2026 and the apprentice turns 18 in October 2027, working in Switzerland without any unusual circumstances. The 2026 wages do not establish 3a eligibility. In 2027, the wages may be subject to OASI from January, before the birthday. The apprentice checks their payslip and whether they belong to an occupational pension fund. This example illustrates timing; it neither sets a contribution ceiling nor suggests how much to pay.
Why some savings should remain accessible
Pillar 3a is tied retirement provision. The money is not freely available for travel, a move or everyday purchases. Suppose an apprentice can save CHF 80 a month but will need CHF 700 for training expenses in nine months. Putting all of those savings into 3a could create a practical difficulty. They can set aside near-term expenses somewhere accessible and consider tying up some money once their budget is stable.
What to check in ten minutes
Look for OASI deductions on payslips, ask the employer for an explanation if they are absent, and confirm occupational pension membership. Compare costs, access to the money, any minimum contribution and recurring commitments. With modest income, do not infer a tax saving merely because contributions are deductible. A sensible first step may be to establish eligibility and then wait until there is enough accessible savings.
Discuss it without deciding for the apprentice
If a parent wants to help, first establish who will own the savings and who can operate the account. A family gift does not replace eligible earned income for the apprentice. With a tight budget, compare two rhythms: regular saving into an accessible account or deciding on a one-off contribution later after verifying eligibility. Before signing an insurance policy, ask what happens if the apprentice returns to full-time education, earns less or ends the apprenticeship early.