Quellensteuer (Withholding Tax)
Quellensteuer is the Swiss income tax deducted directly from an employee's gross salary by the employer, who then remits it to the canton's tax authority. It applies to all employees earning above a minimum threshold (typically CHF 120–150/year depending on canton) and is a primary employer obligation under cantonal law.
Quellensteuer—withholding tax—is the income tax amount you deduct from each employee's paycheck and pay to your canton on their behalf. It is not optional: if your employee earns above the cantonal threshold, you must deduct and remit it.
The rate varies by canton and employee income, typically ranging from 8–22% depending on location and gross salary. Your payroll software or canton tax office provides the exact tariff table for your region.
When Quellensteuer Applies
Quellensteuer is due whenever an employee's annual gross salary exceeds the cantonal minimum threshold. Most cantons set this between CHF 120 and CHF 150 per year. Below that, no withholding applies.
You calculate and deduct Quellensteuer on each paycheck (monthly or bi-weekly). The tax is based on gross salary, marital status, number of children, and canton of residence—not the employer's location.
- Withholding applies to all employment forms: full-time (100% Pensum), part-time, trainees, and temporary workers
- Cross-border workers (CH resident, foreign employer) may have different rules—consult your canton
- Remittance frequency: monthly in most cantons, quarterly in some smaller ones
- Non-resident employees (foreigner working in Switzerland) are sometimes subject to simplified withholding at a flat rate
- Self-employed persons do not pay Quellensteuer; they file regular tax returns
Your Obligation as Employer
Under cantonal tax law (ArG in most cantons), you are responsible for calculating, deducting, and remitting Quellensteuer on time. Late or missing payments incur penalties and interest.
You must register with your cantonal tax authority when you hire your first employee. They issue a withholding tax ID and send you tariff tables and payment deadlines. Update them if employee address or family status changes.
- Calculate withholding using official canton tariff tables (updated annually)
- Deduct the correct amount each pay period; under-deduction is your liability, not the employee's
- Remit by the cantonal deadline—typically the 10th of the following month
- File an annual Quellensteuer declaration (Quellensteuernachweis) by March 31 listing all employees and amounts withheld
- Keep payslips and remittance receipts for seven years for audits
- Verify employee tax residency (Steuersitz) in Switzerland to confirm the withholding rule applies
Most Common Mistake
The most frequent error is using the wrong canton's tariff. Withholding is based on the employee's home canton, not your office location. A Zurich employer withholding using a Zug tariff for a Zug-resident employee will under-withhold, creating a back-tax liability.
A secondary mistake is forgetting to update withholding when an employee's situation changes—marriage, divorce, birth of a child, or move to another canton. You must request a new tax card (Steuerkarte) and apply the new rate immediately.
- Always ask the employee their tax domicile (Steuersitz) on day one and verify in writing
- When circumstances change, immediately request an updated tax card from the employee or canton
- Do not assume canton of residence matches canton of work
- If unsure of the correct tariff, contact your cantonal tax office (Steuerverwaltung) or consult a tax accountant
- Use official tariff tables; calculators and old spreadsheets lead to errors
Frequently asked questions
- Do I withhold Quellensteuer for all employees?
- Only if they earn above your canton's minimum threshold (usually CHF 120–150/year). Part-time and apprentice employees below the threshold are exempt. Verify the exact threshold with your cantonal tax office.
- What happens if I under-withhold or forget to remit?
- You are liable for back-payment plus interest (typically 5% annually) and penalties. The canton can pursue recovery from you, not the employee. Early registration and using payroll software reduces risk.
- Can an employee opt out of Quellensteuer?
- No. Quellensteuer is a legal obligation, not optional. However, employees can file a tax return at year-end and may receive a refund if they over-withheld. Some cantons allow refunds within a year; rules vary.
General information for Swiss employers, not legal advice. Have a lawyer confirm anything with legal consequences.