Quellensteuer (Withholding Tax) Explained
Important: Swiss rules can vary depending on your canton, municipality, nationality, residence status and personal circumstances. This guide provides general information based on official sources and should not be treated as legal, tax, financial or medical advice. Always confirm the current requirements with the relevant Swiss authority.
Step by step
- 1
Check whether Quellensteuer applies to you
It applies to L, B and F/S permit holders who are not married to a Swiss citizen or C-permit holder, and to cross-border G-permit commuters. You leave the system when you obtain a C permit, marry a Swiss or C-permit holder, or move into ordinary assessment. Swiss citizens and C-permit holders always file a return instead.
- 2
Verify your tariff code on the first payslip
A = single with no children. B = married, single earner. C = married, both spouses working. H = single parent living with the child. L/M/N/P = cross-border commuters. Suffixes Y or N show whether church tax is included. The employer sets the code from the details you gave HR — if your marital status, children or church registration are wrong, the withholding is wrong every month until you correct it.
- 3
Understand which canton's tariff applies
The tariff of your canton of residence applies, not the canton where you work. Live in Zug and work in Zurich and you are withheld at Zug rates. If you have no Swiss residence — a cross-border commuter — the canton of the employer applies. Moving canton mid-year changes your tariff from the following month; tell HR the moment you sign a new lease.
- 4
Read the deduction on your payslip each month
It appears as Quellensteuer, impôt à la source or imposta alla fonte, as a single line that already bundles federal, cantonal and communal tax. The rate is derived from your gross including 13th month, bonus and taxable benefits, projected to an annual figure — which is why a bonus month shows a disproportionately large deduction.
- 5
Collect the receipts that generate a refund
Through the year, keep: the Pillar 3a tax certificate your provider issues in January, confirmation of any voluntary Pillar 2 buy-in, Kita or crèche invoices, receipts for work-related further training, evidence of maintenance payments made, and — in some cantons — donations and commuting costs. These are the items the tariff never accounts for.
- 6
File a Tarifkorrektur or an ordinary-assessment request by 31 March
Send the cantonal tax office the correction form for the previous tax year, with the certificates attached. If your gross exceeded CHF 120,000, or you have significant other income or wealth, you file a full return under mandatory ordinary assessment instead. Refunds typically arrive 3–9 months after filing, with interest in some cantons.
- 7
Check the assessment you get back
Compare the assessed tax against what was withheld line by line. Errors are common where a bonus was withheld at a projected annual rate, where you arrived or left mid-year, or where a spouse's income was assumed. You normally have 30 days to object in writing (Einsprache / réclamation) from the date on the decision.
- 8
Plan the switch out of the system
Once you enter ordinary assessment — by request, by crossing the threshold, by C permit or by marriage — you stay in it and file every year. Withholding usually continues as a provisional payment for permit holders, with the final bill trued up on assessment. Set aside the difference in the first year; the first ordinary assessment often arrives with a balancing payment.
How Quellensteuer is calculated
Your employer applies your canton of residence's tariff to your gross monthly salary including 13th month, bonus, taxable benefits and share income. The tariff depends on your civil status, whether one or both spouses work, the number of children under 18 (or in education), your church-tax status, and the canton. Federal, cantonal and communal tax are bundled into the single withheld amount. Crucially, the tariff is built for the average taxpayer in that band: it embeds standard professional-expense and insurance allowances but nothing personal to you, which is where the systematic over-withholding comes from.
The tariff letters explained
Tariff A applies to single people with no children — most young expat professionals. Tariff B is for married, single-earner households. Tariff C is the dual-earner married tariff, and it assumes a second income of a defined size, which is why it can over-withhold when one spouse works part-time and under-withhold when both earn well. Tariff H covers single parents living with a dependent child and is markedly more favourable than A. Tariffs L, M, N and P cover cross-border G-permit holders resident in Germany, France, Italy or Austria. The Y/N suffix indicates whether church tax is included; if you are not a member of a recognised church, make sure you are on the N variant.
When you must, and when you should, file an ordinary return
Two routes leave pure withholding. Mandatory subsequent ordinary assessment (NOV) applies when gross employment income exceeds CHF 120,000 in a calendar year, when you have material non-salary income such as rent, self-employment or foreign income, or when your wealth passes the cantonal threshold. Ordinary assessment on request (NOV auf Antrag) is the voluntary route: you file a full return to claim deductions the tariff ignores. The trade-off is commitment — once in, you generally stay in for the rest of your Swiss residence, and in a year where you make no deductible contributions the return can cost you slightly more than the withholding would have. Model both before opting in, especially in high-rate cantons.
Tarifkorrektur — the lighter route
If you do not meet the NOV thresholds and do not want the lifetime commitment, the tariff correction lets you claim specific items without entering ordinary assessment. Commonly accepted: Pillar 3a contributions (CHF 7,258 for employees in 2026), voluntary Pillar 2 buy-ins, childcare costs, work-related further training and retraining, maintenance payments actually paid, and in several cantons donations, weekday accommodation for a distant workplace, and inter-cantonal commuting above the standard allowance. Not accepted: general living costs, rent, most commuting already covered by the standard allowance, or losses on investments. The deadline is 31 March of the following year in nearly every canton, and the form is on your cantonal tax office website in German, French or Italian, sometimes with an English guide.
Cross-canton and cross-border situations
Your residence canton's tariff governs, and the deduction changes the month after you move — so a move from Geneva to Zug in July means six months at each canton's rate, trued up on any later assessment. Cross-border commuters follow the treaty with their country of residence: Germany and Austria use a capped withholding with taxation mainly at home, France's arrangement differs between the Geneva agreement and the cantons that apply the 1983 accord, and Italy's frontalier rules changed under the 2020 agreement with a transitional regime for existing commuters. If you commute across a border, read the specific treaty position before assuming Swiss withholding is your final tax; the cross-border guide covers this in detail.
Common refund situations
Started or stopped working mid-year: withholding projects your salary as if you worked twelve months, so the effective rate is too high. Married, separated or had a child mid-year: the tariff changes only prospectively. Made a Pillar 3a contribution or a pension buy-in: never reflected in the tariff at all. Paid for Kita or a crèche: a large deduction in most cantons and completely absent from withholding. Received a bonus or RSU vesting: withheld at a projected annual rate. Worked part of the year abroad for the same employer: the Swiss portion may be over-withheld. Any one of these is worth the correction form.
What to do if the assessment looks wrong
Read the decision (Verfügung / décision) carefully: it shows the assessed tax, the tax already withheld, and the balance. If the figures do not match your payslips or a deduction you claimed is missing, file a written objection within the deadline printed on the decision, normally 30 days, attaching the evidence. Objections are free and routine; most are resolved in correspondence without a hearing. If you owe a balance, pay it or agree instalments even while objecting, because interest accrues on late payment regardless of the objection's outcome.
Planning ahead so you keep the money
Three habits cover almost everything. First, pay Pillar 3a by around 20 December so it settles in the right tax year and keep the certificate. Second, put a calendar reminder for 15 February each year to gather the certificates and file the correction before 31 March. Third, before any big change — marriage, a child, a canton move, a large bonus, going part-time — check what it does to your tariff and whether ordinary assessment now makes more sense. The system is not designed to disadvantage foreigners, but it does assume you will ask for your own deductions, and most people simply never ask.
Related canton guides
Your next step
Turn this guide into action — run the numbers for your own situation, then work through the deadlines for your canton.
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Build my free checklistThe 31 March deadline for the tariff correction is strict in most cantons and there is no extension. Miss it and the Pillar 3a, pension buy-in and childcare relief for that year is simply lost.
Once you opt into ordinary assessment on request, the choice is generally binding for the remaining years of your Swiss residence — you cannot switch back to pure withholding because a later year would have been cheaper.
A wrong tariff code (usually married-but-coded-single, or church tax deducted when you are not a member) can cost thousands over a year. Correct it with HR immediately; only the current year is easily fixed.
Bonus and RSU months are withheld at a projected annual rate, so a large one-off payment can be over-withheld. That money comes back only if you file.
People also asked
What is the difference between Quellensteuer and standard taxation?
Quellensteuer is deducted automatically by your employer using canton-specific tariff tables and requires no filing. Standard (ordinary) assessment means you file an annual return, declare income and wealth, claim every deduction, and receive an assessment with a balance to pay or refund. Most B and L permit holders start with Quellensteuer.
Can I get a refund if I overpaid Quellensteuer?
Yes — file a tariff correction with your cantonal tax office by 31 March of the following year. The usual reasons: Pillar 3a contributions, voluntary Pillar 2 buy-ins, childcare costs, work-related further training, maintenance payments, and arriving or leaving mid-year.
How much does a typical correction get back?
A single employee who maxed Pillar 3a (CHF 7,258 in 2026) usually recovers CHF 1,300–2,300 depending on canton and income. Add a Pillar 2 buy-in or two children in Kita and the figure can exceed CHF 5,000. There is no minimum claim size worth filing for — the form takes under an hour.
Is ordinary assessment mandatory above CHF 120,000?
Yes. Gross employment income above CHF 120,000 in a calendar year triggers mandatory subsequent ordinary assessment, and the threshold applies per spouse rather than to household income. Significant non-salary income or wealth above the cantonal threshold can also trigger it, and Geneva and Vaud assess more situations than the average canton.
What happens when I get a C permit?
You leave the withholding system and file annual returns. It normally takes effect from the start of the month after the C permit is issued, so a year of transition often contains both withholding and a return covering the same income.
Which tariff code applies to me?
A for single without children, B for married with one earner, C for married with both working, H for a single parent living with the child. Codes L to P cover cross-border commuters. Your employer sets the code; if it is wrong, contact HR and your cantonal tax office in the same week.
I got married in September — when does my tariff change?
From the month after the change in most cantons. The tariff for the earlier months is not retrospectively adjusted, which usually means over-withholding for a couple where one spouse earns much less. That difference comes back through the correction or the ordinary assessment.
Does Quellensteuer cover wealth tax too?
No. The withholding covers income tax only. Once your net assets pass your canton's wealth-tax allowance, the canton can assess wealth separately even if you never file an income return — Geneva and Vaud do this routinely. See the wealth tax guide for the thresholds.
I left Switzerland mid-year. Can I still claim?
Yes, and it is often the largest single refund people forget. Withholding projected your salary across a full year while you only earned part of one, so the effective rate was too high. File the correction from abroad by 31 March, give a bank account that will still be open, and leave a forwarding address with the tax office.
Official sources for this guide
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