Pillar 3a with B Permit: Why the Voluntary Tax Declaration Can Be a Trap

Published on 2026-04-17

The Pillar 3a is considered the ultimate tax-saving tool in Switzerland. However, for expats with a B permit, a persistent myth persists: that you can simply contribute and "somehow" get the money back. The reality? Without the right strategy, you end up paying double.

The Quick Check

If you only pay withholding tax and do not file a tax return, you will receive no tax deduction for your Pillar 3a. A contribution is only worthwhile if you are either subject to mandatory taxation (income over CHF 120,000) or voluntarily apply for a Subsequent Ordinary Assessment (NOV). But be careful: the latter can even increase your tax burden.

The Myth: “Pillar 3a is worthwhile for everyone”

In traditional financial consulting, Pillar 3a is marketed as a universal tax-saving model. However, for you as a holder of a B permit, if you are subject to withholding tax, this is a dangerous misconception.

The Problem: Withholding tax already includes a flat rate for insurance and retirement provisions. If you now contribute privately to Pillar 3a without filing a tax return (NOV), your tax advantage completely evaporates. Worse still: upon withdrawal in retirement, the capital is taxed again. So you end up paying taxes on money that you could never deduct.

When does Pillar 3a make sense for you?

There are exactly two scenarios in which Pillar 3a becomes a tax-saving model for you:

Mandatory Tax Return: Your gross income is above CHF 120,000 per year (in some cantons, additional limits apply for wealth or secondary income). Here, you must fill out a tax return and can deduct the 3a contributions directly from your taxable income.
The Subsequent Ordinary Assessment (NOV): If you earn less, you can voluntarily apply for a tax return until March 31 of the following year.

Important for the NOV: A shadow calculation with the possible tax deductions is absolutely necessary beforehand. If your municipality's tax rate is too high, you could end up worse off.

The “NOV Trap”

Many believe that the voluntary tax return is merely a "form to collect money." This is not true. Once you apply for the NOV, there is no turning back. If the municipal tax rate at your place of residence is higher than the average of the canton (which is calculated in the withholding tax), your tax bill may end up being higher than before, despite the 3a deduction.

What happens if you contribute but do nothing?

If you contribute to Pillar 3a and do not file a tax return:

No Deduction: Your taxable income does not decrease.
Double Taxation: Upon later withdrawal (e.g., when moving out of Switzerland or retirement), capital withdrawal tax applies.
Low Flexibility: Your capital is tied up without you having utilized the primary advantage – the tax savings.

So before setting up a standing order, you should definitely check your individual situation.

→ Use our free B-Permit Calculator for an initial assessment

Conclusion: Calculate first, then contribute

Pillar 3a is a powerful tool for expats, but it is not a guaranteed win. The myth that you always benefit from a voluntary tax return can be costly.

Our recommendation: Check your place of residence and your income. Only if the ordinary assessment (NOV) is more advantageous than the withholding tax is Pillar 3a the right path for you.

Frequently Asked Questions (FAQ)

Can I deduct 3a contributions if I only pay withholding tax? No. The deduction is only possible if you submit a complete tax return (ordinary assessment).

What is the most important deadline for you as a B permit holder? March 31. By this date, your application for a Subsequent Ordinary Assessment (NOV) must be received by the tax office.

Is Pillar 3a worthwhile when moving abroad? Yes, you can withdraw Pillar 3a early upon definitive departure from Switzerland. Here, too, tax planning plays a significant role.