Geneva tax deductions
Geneva tax deductions: your 2025–2026 guide
A complete Geneva tax return reports all income and assets while claiming the deductions you are entitled to. Employment expenses, pensions, family costs and certain property expenses can reduce taxable income—but each has its own conditions and tax-year limits.
By Sarah Prieur · Swiss certified accountant
At a glance
Key takeaways
- The table below is for tax year 2025, filed in 2026. Do not automatically carry those limits into a 2026 return.
- Cantonal and communal tax (ICC) and direct federal tax (IFD) have different deduction rules.
- A deduction reduces taxable income; it is not usually a franc-for-franc tax credit.
- Tax-at-source employees may need a subsequent ordinary assessment (TOU) to claim additional deductions. A refund is not guaranteed.
How deductions work—and the 2025 limits
A deduction lowers the tax base. Its value depends on income, household circumstances, residence and the applicable tax scale. For illustration only, at an assumed 25% marginal rate, an extra CHF 1,000 deduction would save approximately CHF 250, not CHF 1,000. The 25% assumption is neither an official Geneva tariff nor an estimate for your situation.
Distinguish 2025 income declared in 2026 from planning for tax year 2026. Unless expressly stated otherwise, the following amounts apply only to 2025.
| Deduction | Geneva ICC—2025 | Federal IFD—2025 |
|---|---|---|
| Eligible commuting costs | Maximum CHF 534 | Maximum CHF 3,300 |
| Employee professional-expense allowance | 3% of relevant net income; CHF 640–1,812 | 3%; CHF 2,000–4,000 |
| Eligible professional training paid personally | Maximum CHF 12,756 | Maximum CHF 13,000 |
| Actual third-party childcare | Maximum CHF 26,320 per child | Maximum CHF 25,800 per child |
| Full qualifying child or dependant allowance | CHF 13,660, subject to the restriction below | CHF 6,800 |
These are not automatic entitlements. Age, support, activity and evidence conditions still apply. In particular, for Geneva ICC 2025, the full dependant allowance is limited to CHF 10,508, and the half allowance to CHF 5,254, where a third-party childcare deduction is claimed. Do not simply add the maximum figures together.
Employees: commuting, meals and training
Start with the Swiss salary certificate. Contributions and employer benefits affect the deductions you can claim. An expense already paid or reimbursed by the employer must not be deducted again.
Travel and meals
Commuting expenses must meet the applicable conditions. Owning or using a car does not automatically justify a mileage deduction. For federal tax in 2025, assess public transport and any valid reasons it cannot be used. Under Geneva’s 2025 guide, box F on the salary certificate indicates employer-provided transport and rules out the commuting deduction.
For meals, check eligible workdays, whether you can return home and any employer contribution. Home-working days, absences and subsidised meals can change the calculation. Standard allowances and actual expenses cannot be combined freely; apply the separate ICC and IFD rules.
Professional education and development
Personally funded training can qualify if it serves a professional purpose. For 2025, you must in particular hold an upper-secondary qualification, or be at least 20 and take training that does not lead to a first qualification at that level.
Leisure courses and employer-reimbursed amounts are not personally borne professional training expenses. Keep invoices, attendance evidence and reimbursement details. For example, deducting the full course fee when your employer reimbursed half would overstate the cost you actually bore.
Self-employed taxpayers: start from reliable accounts
For a sole proprietorship, begin with the business result. Expenses must be commercially justified and documented: business premises, software, supplies, professional insurance or operating-related fees, according to their nature and use.
Mixed expenses need a defensible allocation. A phone, car or room used both privately and professionally cannot automatically be treated as wholly business-related. Long-term equipment may require capitalisation and depreciation rather than immediate full deduction.
An owner employed by their own LLC or SA is not treated in the same way as a sole trader. The company and individual file separate returns; keep their expenses separate. Pension and personal deductions must then be claimed at the appropriate level.
Our Swiss self-employed bookkeeping guide includes a worked example showing why owner’s drawings are not a deductible salary.
Pension deductions: pillar 3a and second-pillar buy-ins
Ordinary pillar 3a contributions in 2025 and 2026
The following annual limits apply to both ICC and IFD for 2025 and 2026:
- With second-pillar pension affiliation: CHF 7,258.
- Without second-pillar affiliation: 20% of relevant net earned income, up to CHF 36,288.
Pension-fund affiliation is the key distinction, not simply the label “employee” or “self-employed”. Eligibility requires, in particular, qualifying earned income subject to AHV/AVS. Retain the institution’s tax certificate.
Pillar 3a catch-up contributions from 2026
The first eligible buy-in can be made in 2026 for a 2025 contribution gap. Only gaps from 2025 onward are covered, with a maximum ten-year look-back under the conditions. The annual buy-in ceiling for 2026 is CHF 7,258 in addition to the ordinary contribution.
You must have been entitled to contribute in the gap year and the buy-in year, and must have paid the full permitted ordinary contribution for the buy-in year. A 2026 buy-in is deducted in 2026; it does not retrospectively change the 2025 return. Confirm eligibility with the institution before paying.
Occupational pension buy-ins
An eligible BVG/LPP buy-in can reduce taxable income, but it must fit the purchase capacity recognised by the pension fund. Review retirement, lump-sum withdrawal and property plans beforehand.
The 2025 tax guide warns that a lump-sum withdrawal before the three-year period expires can lead to reversal of the deduction through a tax reassessment. Consider liquidity and pension conditions as well as immediate tax savings. A future move abroad also requires checking the separate withdrawal rules.
Families: childcare, dependants and maintenance
Third-party childcare deductions concern actual, evidenced costs up to the month of the child’s fourteenth birthday. Eligibility depends on factors including the parents’ employment, training or lasting inability to work, with specific provisions for single parents living with minor children in their custody.
Nursery care, qualifying after-school care or a paid childminder may qualify. School meals and household chores do not become childcare costs merely because they appear on the same invoice. Attach the required invoices; payments to a directly engaged carer must identify the provider.
The dependant allowance is separate. Assess support provided, the child’s situation and income, and allocation between parents. After separation or a custody change, do not simply copy last year’s claim.
Qualifying maintenance paid to an ex-spouse or for a minor child can be deductible. Child maintenance does not automatically remain deductible after adulthood: Geneva’s guide provides for pro-rata treatment through the month the child reaches majority. Keep the agreement or judgment and payment evidence.
Homeowners: maintenance, mortgage interest and the 2029 reform
The current system remains applicable for tax years 2025 and 2026. Eligible maintenance may be claimed under the applicable standard-allowance or actual-cost rules. Work that preserves a property’s condition can differ from improvements that increase its value. Energy-saving expenditure has specific conditions.
In Geneva, the invoice date generally determines the deduction year for actual costs. Certain energy investments and demolition costs may qualify for a regulated carry-forward. Keep detailed invoices and a breakdown of different types of work.
Eligible mortgage interest relates to income tax; repaying mortgage principal is not an income deduction. The debt itself is relevant to wealth tax. For example, a payment containing both interest and principal cannot be deducted in full as interest.
Imputed rental value: change from 1 January 2029
Geneva’s 7 April 2026 announcement confirms that the reform takes effect on 1 January 2029, with current law continuing through 2028. Abolition of imputed rental value comes with restrictions on deductions. Do not apply future rules to a 2025 or 2026 return.
Health insurance, medical costs and donations
Health insurance premiums and treatment costs belong in different categories. Geneva’s cantonal premium limits depend on its rules and age brackets; federal tax has its own limits. Declare subsidies as the relevant guide requires.
For 2025 medical expenses, only eligible unreimbursed costs above 0.5% of relevant net income for ICC or 5% for IFD are deductible. This is not reimbursement of healthcare by the tax office. Disability-related expenses follow a separate regime and should not automatically be subjected to these thresholds.
Donations must go to qualifying recipients. In 2025, the deduction is capped at 20% of net income before donations for both ICC and IFD; federal tax additionally requires at least CHF 100 in total donations. Religious donations are not treated identically at both levels. An ordinary mandatory association membership fee is not automatically a donation.
Keep insurer statements, reimbursement details and donation receipts so the claimed amount can be reconciled to what you actually paid.
Tax at source: claiming deductions through TOU
You cannot simply subtract these expenses from the tax your employer withholds. A subsequent ordinary assessment (taxation ordinaire ultérieure, TOU) can allow additional deductions, but eligibility differs for Swiss residents and non-residents.
TOU recalculates tax from a complete return. It can lead to a refund or an additional bill. For residents, it generally continues in following years until source-tax liability ends. A request cannot simply be withdrawn because the outcome is unfavourable.
The request deadline for tax year 2025 was 31 March 2026 and has passed. The usual deadline for 2026 income is 31 March 2027. Extending an ordinary return-filing deadline is a different matter. Review the full calculation before a voluntary request; our Geneva withholding-tax guide explains DRIS and TOU.
Documents to prepare and checks after filing
- Salary certificates and pension contribution certificates.
- Professional-expense and training invoices, including reimbursements.
- Childcare bills, family documents and maintenance payment evidence.
- Health insurance statements, medical reimbursements and donation receipts.
- Property invoices, mortgage interest certificates and debt balances.
- Business accounts and a clear separation of private and business spending, where relevant.
Not every document is submitted in the same way. Some must accompany the return; others must be retained for a request. The 2025 guide, for example, requires childcare invoices, while medical and donation evidence is generally kept available. Follow each section’s instructions.
Compare the eventual assessment with the return: claiming a deduction does not mean it was accepted. Geneva’s tax shield for certain wealth situations is a separate subject, not an additional universal deduction.
Frequently asked questions
Can I still pay into pillar 3a to reduce my 2025 income?
An ordinary payment made in 2026 does not belong to 2025. An eligible buy-in covering a 2025 gap can be made from 2026, but it is deducted in the year of the buy-in.
Should I always choose actual expenses?
No. Compare eligible actual costs with the allowance under the separate cantonal and federal rules. Your total spending is not necessarily the deductible amount.
Does spending more always save money through deductions?
No. A CHF 1,000 expense does not become free because it is deductible. The spending should first meet a real need and fit your budget.
Are the 2025 limits also valid for 2026?
Not automatically. The pillar 3a limits in this guide are confirmed for both years. The other listed deduction amounts are expressly for 2025; use the appropriate 2026 instructions for that tax year.
Sources and further reading
About the author
Sarah Prieur
Sarah is a Swiss certified accountant, partner and head of operations at Karpeo. She supports SMEs and self-employed clients with accounting, tax, VAT and payroll, and oversees the quality of client files and year-end accounts. Before Karpeo, she spent eight years in audit at PwC Switzerland, progressing to manager.
Have your Geneva tax return reviewed
A birth, separation, new self-employed activity or retirement plan can affect several parts of your return. Karpeo helps check deductions and prepare the supporting evidence.
