Guide
Deductions
Deductions reduce your taxable income and thus your tax burden. Which deductions are permitted and how you document them is regulated partly differently by the Confederation and the cantons.
In brief
Deductions include in particular professional expenses, expenses for education and further training, childcare costs, debt interest, donations and medical and insurance costs you bear yourself. The current guidelines of your canton and federal law are always decisive. Collect all receipts during the year so that you can fully substantiate the information in your tax return.
What matters
Actual versus lump-sum deductions
For many items you can choose between a lump-sum deduction and the actual, documented costs. Which option is more favourable depends on your personal situation and is worth calculating.
Note cantonal differences
Uniform rules apply to the direct federal tax, whereas for cantonal and communal taxes the rates and maximum amounts can vary from canton to canton. Therefore always check the current guidelines of your canton.
Receipts are mandatory
Without proof, deductions are generally not accepted. Keep receipts, invoices and confirmations for as long as the retention periods require.
Timing of the costs
As a rule, what matters is the tax year in which the costs were incurred. Where possible, plan larger expenses such as further training or renovations with the tax period in mind.
Individual review in case of uncertainty
In more complex situations, for example self-employment or cross-border circumstances, a review by a specialist is recommended.
Articles on Deductions
5 articles with explanations, checklists and sources.
- Professional expenses and commuting: what you can deductProfessional expenses include in particular travel costs between home and place of work, additional costs for meals and other expenses necessary for carrying out your profession. You can claim either the lump-sum deduction or the actual, documented costs. For the commute, the cheapest reasonable means of transport generally serves as the benchmark. Anyone with several places of work or a varying workload should document the details particularly carefully so that the tax administration can follow the facts.Read article
- Deducting education and further training costs from taxYou can claim costs for job-related education and further training as a deduction up to a maximum amount set annually. As a rule, the requirement is a connection to your professional activity or a recognised retraining. Initial education up to a certain qualification may be regarded as already covered and is not additionally deductible. Careful documentation of the course content and the professional connection makes recognition by the tax administration easier.Read article
- Childcare costs and family deductionsParents can deduct costs for the care of children by third parties up to a maximum amount per child set annually, provided the care is related to employment, education or incapacity to work. In addition, there are general child deductions that are granted regardless of the actual childcare costs. The exact requirements and amounts can be found in the guidelines of your canton. Complete documentation of the childcare arrangements makes the assessment easier and prevents queries.Read article
- Deducting donations, debts and debt interest correctlyDonations to organisations recognised as charitable by the Confederation or canton can be deducted up to a percentage of net income. Interest on private debts, such as mortgages or consumer loans, is also deductible within certain limits. Proof of the actual flow of payments and the recognised charitable status of the recipient organisation are always decisive. A complete list of debts is also important for the declaration of assets.Read article
- Deducting medical costs and insurance premiumsHealth insurance premiums and other insurance premiums can be claimed within the scope of the insurance deduction set annually. Medical and accident costs you bear yourself are additionally deductible, provided they exceed a certain share of net income. It is important that only costs actually paid by you and not covered by insurance are taken into account. Keeping the receipts in an orderly manner throughout the year makes calculating the deductible portion considerably easier.Read article
What you should have ready
- Salary certificate with details of expenses and fringe benefits
- Receipts for travel costs between home and place of work
- Invoices for education and further training
- Proof of childcare costs paid to third parties
- Donation confirmations from charitable organisations
- Summary of debt interest
- Receipts for medical and dental costs you paid yourself
- Premium invoices from your health insurer
Frequently asked questions – Deductions
Sources and related topics
Sources
Updated: August 2026 · General information, not individual tax advice.
Related topics
Your tax return in good hands
Tell us about your situation in the request form – free of charge and without obligation.
