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Quellensteuer explained – withholding tax, your first Swiss tax return, customs and pets

Last updated 25 September 2026Rules checked every MondayOfficial sourcesSources & methodology →

Most newcomers to Switzerland never fill in a tax form in their first year, because the employer deducts Quellensteuer (withholding tax) from every payslip. Yet one missed deadline can cost you a year of deductions. Here is how tax at source, the tax return, customs and pet rules work in 2026.

Woman with glasses using a calculator and laptop with bills at home
Photo: fizkes/Adobe Stock

If you work in Switzerland on an L or B permit, your employer deducts Quellensteuer / impôt à la source (tax at source, or withholding tax) from your salary every month and pays it to the cantonal tax authority. It covers federal, cantonal and communal income tax in one go – but deductions you are entitled to only count if you claim them in time.

What is new in Swiss tax for 2026?

DateChangeStatus
From tax year 2026Federal commuting deduction: CHF 0.75 per km by car (was CHF 0.70), total still capped at CHF 3,300In force
1 January 2026Canton of Geneva: tariff C for two-income couples caps the spouse's assumed income at CHF 70,500In force
2026 and 2027Canton of Zurich: cantonal multiplier cut to 95 per cent, from 98 per centIn force
8 March 2026Voters approve individual taxation of married couples, 54.23 per cent yesTakes effect in 2032
29 November 2026Vote on an initiative for fairer federal taxes for married couplesPending
1 January 2029Imputed rental value and the maintenance deduction for owner-occupied homes abolishedDecided, not yet in force

Source: Federal Tax Administration (ESTV), Federal Department of Finance, cantons of Zurich and Geneva, read 23 September 2026.

Until 2032, married couples and registered partners file one joint return with both incomes added together. The Federal Council set 2032 for individual taxation on 19 August 2026 and says the act stays valid even if the November initiative passes. The federal child deduction is then due to rise from CHF 6,800 to CHF 12,000.

Who pays Quellensteuer in Switzerland?

According to the official Swiss portal, tax at source applies to all foreign workers resident in Switzerland except C permit holders and people married to a Swiss citizen or a C permit holder. It also covers people who live abroad and work here, such as cross-border commuters. Under federal law you are tax-resident if you live here intending to stay, or stay at least 30 days while working (90 days without work). Studying here while keeping your home abroad does not count.

Rates are set by each canton. In the canton of Zurich, the deduction depends on your gross income, marital status, eligible children and religious denomination, and the year's total appears in box 12 of your Lohnausweis / certificat de salaire (salary certificate). In the canton of Geneva, it is calculated each month on your annualised salary, and you must report any change in your family situation within 14 days. In Zurich, tax at source ends from the month after you obtain a C permit or Swiss citizenship, or marry a Swiss-resident person who holds either.

When do you still need a Swiss tax return?

Under the federal Withholding Tax Ordinance, a gross employment income of at least CHF 120,000 in a tax year triggers a nachträgliche ordentliche Veranlagung / taxation ordinaire ultérieure (NOV, subsequent ordinary assessment) – a full return – in every canton. Below that you may request one by 31 March of the following year, irrevocably. The canton of Zurich adds:

Situation (canton of Zurich)What happens
Gross salary of at least CHF 120,000 a year; spouses' salaries are not added togetherCompulsory full return
Other income not taxed at source of at least CHF 3,000, or worldwide wealth of at least CHF 80,000 (CHF 160,000 for married couples)Compulsory full return
You want to claim pillar 2 buy-ins, pillar 3a, childcare costs or actual professional expensesVoluntary request, filed electronically by 31 March of the following year, no extension; a return every year after that
Wrong tariff code or wrong gross income on your deductionCorrection request by 31 March of the following year
You live abroadRequest possible only if at least 90 per cent of the family's worldwide income is taxed in Switzerland

Source: Kantonales Steueramt Zürich (cantonal tax office) and the federal Withholding Tax Ordinance (QStV), read 23 September 2026.

Expatriate managers and specialists posted here for at most five years may deduct extra costs under the federal Expatriates Ordinance, or a flat CHF 1,500 a month for housing and travel.

How is Swiss income tax calculated?

Switzerland taxes income at three levels: the Confederation levies direct federal tax, and cantons and communes tax income and wealth. Each commune sets its own tax coefficient, so one canton can have both low-tax and high-tax communes.

Federal tax is progressive and reaches a flat 11.5 per cent at the top. If Anna is single with taxable income of CHF 100,000, her direct federal tax for 2026 is CHF 2,684.35, or CHF 1,816.00 if she were married; each child cuts it by CHF 263. Cantonal and communal tax comes on top. The key federal deductions for 2026:

Federal deduction2026
Per childCHF 6,800
Married couplesCHF 2,800
Dual earnersCHF 8,600 to 14,100
Third-party childcare, per childUp to CHF 25,800
Commuting by carCHF 0.75 per km, all commuting capped at CHF 3,300
Pillar 3aUp to CHF 7,258 with a pension fund, CHF 36,288 without

Source: Federal Tax Administration (ESTV), read 23 September 2026.

The cantonal tax administration sends you the return, which you can file electronically in every canton; the usual deadline, printed on the form, is 30 days, and you can ask for more time. In the canton of Zurich, the 2026 return is due by 31 March 2027. Ignore a reminder and you face an assessment at the tax office's discretion and a fine of up to CHF 1,000 under federal law, or CHF 10,000 in serious or repeat cases.

Customs and pets: what can you bring in duty-free?

According to the Federal Office for Customs and Border Security (BAZG), household effects, animals and a car enter duty-free when you move your residence here, provided you have used them personally for at least six months and keep using them.

Customs ruleWhat applies
FormForm 18.44 (Übersiedlungsgut, removal goods) with a full list of goods, pets included
Proof of the moveEU/EFTA citizens: employment contract, lease or deregistration certificate
Time limitWithin two years of moving
AlcoholDuty-free up to 200 litres at up to 25 per cent alcohol, 12 litres above that
CarCleared at its first border crossing after the move; Swiss plates within one year at the latest

Source: Federal Office for Customs and Border Security (BAZG), read 23 September 2026.

The customs information centre answers on +41 58 467 15 15, Monday to Friday 08:00–11:30 and 13:30–17:00.

From the EU, dogs, cats and ferrets need a microchip, a valid rabies vaccination and a recognised pet passport, says the Federal Food Safety and Veterinary Office (BLV); the first jab is possible from 12 weeks and valid 21 days later. From countries with a high rabies risk, animals also need an antibody test and long waiting times, so those under seven months cannot enter.

Register your dog with your commune, which enters it in the national AMICUS database, and pay the dog tax – about CHF 100 to 200 a year, depending on the commune. In the city of Zurich, dogs over three months must be registered within ten days of arrival. In the canton of Geneva, the cantonal tax is CHF 50 for the first dog and CHF 70 for the second, plus communal additional centimes and small fund charges.

What to do now

StepWhatWhen
1Check the tariff code on your payslip and box 12 of your Lohnausweis (Zurich)Monthly
2Report changes in your family situation (Geneva: within 14 days)As they happen
3Keep receipts for pillar 3a, childcare and commutingAll year
4Decide on a voluntary ordinary assessment – it cannot be withdrawnBy 31 March of the following year
5Present form 18.44 and your list of goodsWithin two years of moving
6Register your dog with the communeCity of Zurich: within ten days

Source: Kantonales Steueramt Zürich, canton of Geneva, BAZG and City of Zurich, read 23 September 2026.

Official sources

The official pages this guide is based on, read 23 September 2026. Links open the authority’s own website.

Relocate in Europe provides general information, not legal or financial advice for your individual situation. Check with the authority named above before you act – rules change, and your case may differ.