Quellensteuer vs ordinary assessment (NOV): when filing a return pays
Updated · 2 sources
Direct answer
Quellensteuer is final unless you act: Permit B and L holders are taxed at source by tariff, and a subsequent ordinary assessment (NOV) becomes mandatory at CHF 120,000 gross employment income and optional below it if you apply by 31 March of the following year. The NOV is where Pillar 3a contributions, pension buy-ins and real professional costs get deducted, but it is a one-way door: once granted, you file full returns until your source-tax obligation ends.
Key facts
- Mandatory NOV: gross employment income of at least CHF 120,000, or other non-taxed income or taxable assets (cantonal thresholds)
- Voluntary NOV: apply by 31 March of the following year, a hard forfeiture deadline (Verwirkungsfrist)
- Deductions like Pillar 3a, BVG buy-ins and childcare costs are claimable only via NOV, not in the tariff
- Withholding tax already paid is credited interest-free against the NOV bill; the result can be higher or lower
Side by side
| Quellensteuer (default) | NOV (ordinary assessment) | |
|---|---|---|
| How taxed | Employer deducts by tariff (canton, family, church) | Full tax return on worldwide income and assets |
| Deductions | Flat amounts built into the tariff | Actual: 3a, BVG buy-ins, debt interest, childcare, training |
| Who must / may | All B/L permit holders | Mandatory from CHF 120,000; optional on request by 31 March |
| Reversibility | Applies until C permit or citizenship | Once in, you stay until source-tax duty ends; request cannot be withdrawn |
Should you apply? Run the simulation first
The classic NOV win is a year with large deductible items the tariff does not see: a pension-fund buy-in, full Pillar 3a payments on a high salary, third-party childcare, or a long commute. The classic NOV loss is the high-income single in a high-tax municipality whose tariff was computed at a favourable cantonal average.
Because the application is due by 31 March and is effectively irrevocable, simulate before you sign: estimate taxable income under both systems with your canton tax office's calculator, including wealth tax on any assets. Cross-border commuters (Permit G) follow a different route and generally need quasi-resident status (90% of worldwide income taxable in Switzerland) to access an NOV.
FAQ
- I earn under CHF 120,000. Can I still get an ordinary assessment?
- Yes, if you are resident in Switzerland: apply to your cantonal tax office by 31 March of the following year. The application is binding and repeats automatically in later years until your withholding-tax obligation ends.
- Can I deduct Pillar 3a under Quellensteuer without an NOV?
- No. The tariff contains only flat-rate deductions. Actual 3a contributions, BVG buy-ins and similar items are recognised only in an ordinary assessment, which is why paying into 3a without filing an NOV often wastes the deduction.
- What happens to the tax already withheld if I get an NOV?
- It is credited against the assessed tax without interest. If the assessment is lower you are refunded the difference; if higher, you receive a bill.
- I missed the 31 March deadline. Any way back?
- For that tax year, generally no: the deadline is a forfeiture deadline. A separate, narrower correction (Neuberechnung) exists only for tariff errors such as wrong income, wrong tariff code or wrongly assumed tax liability, also by 31 March.
Related guides
- Swiss gross-to-net salary in 2026: AHV, ALV, BVG and taxes explainedIn Switzerland, mandatory employee social security and pension deductions reduce gross salary by roughly 10% to 16% before income tax: 5.30% for AHV/IV/EO, 1.10% for ALV (up to CHF 148,200), ~1.3% for NBU/KTG, and 3.5% to 9.0% of coordinated salary for the 2nd-pillar pension (BVG/LPP).
- Pillar 3a maximum for 2026: CHF 7,258 or 20% of incomeIn 2026 you can pay up to CHF 7,258 into Pillar 3a if you have a pension fund. Without one, the limit is 20% of net earned income, up to CHF 36,288.
- How to get a Swiss work permit: EU/EFTA and non-EU pathsEU/EFTA citizens get a Swiss work permit by taking a job and registering with their commune within 14 days of arrival and before starting work; the employment contract alone creates the right. Non-EU/EFTA nationals cannot apply themselves: a Swiss employer must prove no suitable CH/EU candidate was available and win a quota permit (usually a 1-year B) before they may enter and start.