Swiss tax return checklist for expats

Before you start, check which return you need

A Swiss tax return is much easier to handle when the paperwork is already in one place. The frustrating part is usually the missing bank statement or the pension certificate you thought you had saved.

Start by checking your canton, the tax year and the deadline on your tax letter. Use the instructions for that year. Last year’s return is a helpful reference, but your income, circumstances and deduction limits may have changed.

If tax comes straight out of your salary, check whether you also need to file a return. Tax at source does not settle that question for every expat. A subsequent ordinary assessment, often called NOV, may be compulsory or available on request. The request has its own deadline and can lead to a higher or lower final bill. Check the rules before applying.

Official guidance: tax at source and Zurich’s NOV guidance (German). Your own canton’s rules apply.

Get your documents together

Make a folder for the tax year and put the relevant statements in it. If something is missing, ask the employer, bank or insurer for a replacement early. A document labelled “tax statement” is usually more useful than a screenshot of your current balance.

For a typical employee’s return, start with the following. You will only need the items that apply to you.

Income

Salary certificates from each employer, plus statements for pensions, benefits, additional jobs or other income.

Bank accounts & investments

Year-end tax statements showing balances, interest, dividends and securities. Include accounts outside Switzerland.

Pensions

Pillar 3a contribution certificates and certificates for any deductible occupational pension purchases.

Insurance & medical costs

Your annual health-insurance statement, relevant insurance certificates, and medical or dental bills showing what you paid yourself.

Loans & mortgages

Statements showing the debt outstanding and the interest charged during the tax year.

Expenses & donations

Records of commuting, work-related costs, eligible training, childcare and donations.

Property & other assets

Property records, rental income, mortgage details and relevant costs, including for property abroad. Have information on vehicles and other reportable assets ready too.

Your tax paperwork

The current tax letter or access code, last year’s return and the most recent assessment. Note changes such as moving home, marriage or a new job.

See the Swiss authorities’ document checklist for a general starting point.

Check your work expenses

It helps to work through the expense sections before checking the final totals. Do not assume that every cost connected with your job is deductible, or that an amount accepted last year is still right.

Travel to work

Have your public-transport costs or commuting details ready. Car costs are not automatically deductible simply because you drove. Eligibility, mileage calculations and deduction caps depend on the applicable rules. Account for days worked from home and any employer reimbursement.

Meals away from home

A meal deduction depends on your working arrangements and whether you can reasonably eat at home. Subsidised meals or a staff canteen can affect it. Check the relevant box on your salary certificate and the current instructions; there is no single distance rule to use for every Swiss return.

Other job costs and training

Check whether the standard allowance or an itemised claim is appropriate for other professional expenses. Keep receipts for eligible training and further education, and separate costs you paid from anything your employer covered. A course fee is not automatically deductible just because it appears on a receipt.

Use your canton’s current guidance on professional expenses. The Federal Tax Administration’s deduction comparisons show why amounts and rules need checking by canton and tax year.

Look at the other deductions

This is the part worth doing slowly. Several payments may look similar in your bank account but belong in different places on the return.

Pillar 3a and pension contributions

Use the contribution certificate for the relevant year and check the deduction you are entitled to claim. The maximum is not the same for everyone. If you made a pension purchase or a catch-up contribution, check its specific conditions rather than treating it as a routine payment.

See ch.ch’s pillar 3a guidance for eligibility and contribution rules.

Health insurance and medical bills

Insurance premiums and unreimbursed medical costs are separate deductions. Premium deductions are limited. For medical and dental costs, start with qualifying expenses you actually bore after reimbursements; a minimum threshold may apply. Where it does, only the qualifying amount above it is deductible. Do not calculate that threshold from the net salary figure alone.

Debt and interest

Keep the outstanding loan balance separate from the interest paid. Debt can affect taxable wealth; eligible debt interest can affect taxable income, subject to limits. Repaying the loan itself is not an income-tax deduction.

Donations and family costs

Keep donation receipts and check that the recipient qualifies for a deduction. Childcare costs and family deductions also have conditions and limits. A change in your household is a good reason to review this section instead of copying last year’s figures.

For an example of how these categories are treated, see Zurich’s 2026 tax-return instructions (German PDF). Check the corresponding guide for your canton and year.

Include income and assets abroad

For expats, the account left open back home is easy to overlook. Do not assume that an account, investment or property can be left off your Swiss return because it is abroad or already taxed elsewhere.

For Swiss tax residents filing a return, foreign income and assets generally need to be disclosed. Reporting something does not always mean Switzerland taxes it directly: allocation rules and tax treaties can affect the treatment, and foreign property can influence the tax rate. A move into or out of Switzerland during the year needs particular care.

For bank accounts and investments, distinguish the value of what you own from the income it produced. You normally need the year-end balance or tax value, interest and dividends, and any tax withheld. Use the prescribed exchange rates or valuation guidance for the relevant tax year.

See Zurich’s guidance on income and assets and Zug’s guidance on accounts, securities and currencies (German).

Check withholding tax on investment income

Swiss withholding tax on certain investment income may be refundable or credited when the assets and income are properly declared and the refund conditions are met. This is separate from the tax deducted from your salary. Foreign withholding tax follows different rules, so do not combine the two.

The Federal Tax Administration explains Swiss withholding tax and the conditions for a refund.

Use the right value for other assets

Use your canton’s valuation instructions for vehicles and other reportable assets. Do not reuse a car’s original purchase price every year or apply a universal depreciation percentage. Ordinary household belongings are generally exempt; valuable collections or investment assets can be treated differently.

Review the return, then submit it

When everything is entered, take a break before the final check. It is easier to spot a missing account or a misplaced decimal when you are no longer concentrating on filling boxes.

• Check personal details, the tax year and any changes in your household.
• Match income and account balances to the supporting statements.
• Check for missing foreign accounts, property or investment income.
• Make sure expenses have not been claimed twice or included after reimbursement.
• Attach the documents the canton requests, then complete every submission step.
• Save the submitted return, attachments and confirmation. If filing on paper, check the required signatures.

If you need more time, check the canton’s extension procedure before the filing deadline. Do not assume that an extension for the return also extends a separate deadline to request an assessment.

Check the assessment when it arrives

The assessment is worth reading even after the return has been submitted. Compare the accepted income, assets and deductions with your copy, and look for explanations of any changes. If something looks wrong, act within the objection period stated in the notice.

Zurich explains its tax bills and objection procedures (German). Follow the instructions on your own notice.