Provisional tax bills in Switzerland: how they work
Published 2026-10-19 · Updated 2026-10-19 · 3 min read · 3 sources · Verified Swiss federal benchmarks
Direct answer
Cantons and communes bill income and wealth tax during the year on a provisional basis using estimated income and assets, then settle the difference after you file the return. Payment dates and instalments are cantonal; missing a provisional bill does not replace the duty to file if ordinary assessment (NOV) applies from CHF 120,000 gross or if you opted in by 31 March.
Key facts
- Provisional bills are prepayments toward the final cantonal and municipal tax.
- Estimates use prior-year data or employer signals unless you notify a change.
- Wealth tax prepayments run in parallel where cantons tax net assets.
- Final assessment after the return may trigger a refund or additional payment.
- Withholding tax (Quellensteuer) is a different system for B, L, and G permit holders.
What the invoice contains
Cantonal income tax at the provisional rate or tariff your commune applies.
Municipal share through the multiplier listed on the bill.
Church tax surcharge if you are a member in a canton that levies Kirchensteuer.
Wealth tax instalment if your canton taxes net assets during the year.
Swiss QR-bill payment section with reference number; use the QR reference tool if you automate payments.
Example flow for one year
January: commune sends provisional bill based on last year's taxable income of CHF 85,000.
March: new job pays CHF 120,000 gross. Mandatory NOV applies from CHF 120,000.
April: you notify the tax office in writing. They may increase instalments for income and wealth tax.
December: you pay CHF 7,258 into Pillar 3a with a pension fund. Provisional bills already sent do not reflect that deduction; the final return does.
Following year: assessment compares total tax due with provisional payments and issues refund or balance.
- 1Pay provisional bills by the due date to avoid interest.
- 2Report salary jumps, unemployment, or large deductions promptly.
- 3File the annual return by the cantonal deadline.
- 4Compare final decision with provisional payments.
- 5Claim refund or pay balance within the appeal window if you disagree.
Worked example: underpayment risk
Provisional bills assumed CHF 90,000 taxable income. Actual income after bonus is CHF 130,000 taxable.
Social security on the bonus still shows on Lohnausweis: 5.30% AHV/IV/EO without cap plus 1.10% ALV up to CHF 148,200 total salary.
You paid four provisional instalments totalling CHF 8,000. Final income and wealth tax might be CHF 11,000.
You owe CHF 3,000 plus possible interest if you never notified the commune after the raise.
Early notice often spreads the extra into remaining instalments instead of one shock at assessment.
When to react early
Side income, equity vesting, or a large bonus moves marginal tax without changing social caps until salary exceeds CHF 148,200 for ALV.
Unemployment: notify before the next instalment to lower prepayments.
Marriage, divorce, or children change household taxation in many cantons.
Canton move: deregister and register so the correct commune bills you; 31 December residence fixes the year.
Common mistakes
Treating provisional tax as the final liability and skipping the return.
Missing NOV filing when gross exceeds CHF 120,000 because bills looked small.
Paying 3a in January and expecting lower provisional bills for the prior year without filing.
Ignoring wealth tax instalments while only watching income tax slips.
Assuming Quellensteuer employees never receive provisional bills; rules vary by permit and correction claims.
FAQ
- Is provisional tax the final amount?
- No. It is an interim payment. The final amount follows the assessment on your return.
- What if I overpay provisionally?
- The excess is refunded or credited after final assessment, unless offset against other debts to the commune.
- Do employees always get provisional bills?
- In many cantons yes, for residents in ordinary assessment. Withholding taxpayers follow a different path.
- Can I reduce instalments before filing?
- Often yes if you prove lower expected income or higher deductions. Submit evidence; cantons decide case by case.
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