Expense Tracking for Swiss Freelancers: What You Can Deduct

Swiss freelancers operating as sole traders (Einzelunternehmen) deduct Geschäftskosten (business expenses) from their taxable income. The principle is the same as in Germany and Austria: expenses wholly and exclusively for business purposes reduce your tax bill. Swiss rates, limits, and documentation requirements have their own specifics.

Common Deductible Expenses

Home office (Arbeitszimmer). A room used exclusively for business entitles you to deduct a proportional share of rent, utilities, and internet. The room must be your primary workplace. Swiss tax authorities apply this rule strictly: a mixed-use space is generally not accepted. The deductible amount is typically calculated as a fraction of total floor area.

Technology and equipment. Computers, phones, software subscriptions, cloud services, and office equipment are deductible. Items costing over CHF 1,500 are depreciated over their useful life. Items under CHF 1,500 can be fully expensed in the year of purchase.

Professional development. Courses, books, conferences, and professional memberships directly related to your field are deductible.

Travel costs. Business travel is deductible: train, flight, accommodation. Meal expenses during business travel are deductible at a flat allowance (Tagespauschale) rather than by receipt. The Swiss tax authority publishes updated flat rates annually. Personal vehicle use for business trips is deductible at the standard rate of CHF 0.70 per kilometre.

Professional insurance. Business liability insurance premiums are fully deductible. AHV/IV/EO contributions paid as a self-employed person are deductible from cantonal income but the treatment for federal tax differs slightly. Your Treuhänder handles this distinction.

Treuhänder fees. Your fiduciary’s fees for bookkeeping, tax return preparation, and advisory services are fully deductible.

What Requires Documentation

Every deduction requires a supporting Beleg (receipt or invoice). Swiss tax authorities conduct detailed reviews during audits (Steuerprüfungen) and will disallow any deduction without valid documentation.

For flat-rate deductions (Tagespauschale, Kilometergeld), you record your business trips in a log rather than collecting receipts. The log should show date, destination, purpose, and distance or duration.

Cantonal Differences

Swiss income tax has both a federal component (Direkte Bundessteuer) and a cantonal component (Staatssteuer). The cantonal rates vary significantly: Zug and Schwyz are the lowest-tax cantons, while Geneva and Vaud are among the highest. While the types of deductible expenses are broadly consistent, specific limits and interpretations can vary by canton. Your Treuhänder should know the local practice.

How KontoMatch Helps

KontoMatch captures your receipts, extracts the relevant data (vendor, date, amount, MWST), and categorizes each expense automatically. At year end, you have a complete, documented record of every business expense with source documents attached, ready for your Treuhänder to review and incorporate into your tax return.