For many international households settled in Geneva, tax is deducted every month, quietly, from the payslip. This withholding at source is not a definitive levy you simply endure: it is a precise mechanism, with its own rules, its own actors and its own routes for correction. Understanding its logic keeps you from overpaying, or from discovering a difference to settle too late. Here is an overview, anchored in the official sources, without quoting any figure: the tax scales and thresholds are set out in the linked texts and change from year to year.
Who withholds, and on whose behalf
The first thing to grasp is each party's role. It is not you who pays the tax to the administration: it is your employer who withholds it from your remuneration, then remits it to the tax authority. In the language of the law, the employer is the debtor of the taxable benefit. It calculates the deduction, subtracts it from gross salary, accounts for it to the canton and is answerable for it — including if it applies the wrong scale. The general framework can be consulted on estv.admin.ch — Tax at source and, for the canton, on ge.ch — Tax at source.
The tax scale: what you must declare
The deduction is not uniform. It depends on a scale that reflects your personal and family situation: living alone or as a couple, whether your spouse works, the number of dependent children, and, in certain cantons, membership of a recognised religious community (this does not apply in Geneva). Yet the administration knows your situation only through what you, and your employer, declare. This is why the choice of scale rests largely on the information you provide at the time of hiring. An approximate declaration mechanically produces an inaccurate deduction. The applicable scales and their conditions appear on the linked cantonal page; we reproduce here neither the letters nor the rates, which belong to the official texts.
Your duty to report changes
Life does not stop on the day you are hired. A marriage, a separation, a birth, the start or end of a spouse's activity: each of these alters the applicable scale. The rule requires such changes to be reported, so that the withholding follows your real situation. Neglecting to report them lets a discrepancy run that will sooner or later have to be corrected, one way or the other. Keeping this information current with your employer and the administration is among the useful habits of a well-organised household.
When withholding ceases to apply
Tax at source does not necessarily last a whole career. As a rule, it concerns people who do not hold a settlement permit. It ceases in particular when the taxpayer acquires that settlement, or when they share a household with a spouse who is a Swiss national or is themselves settled: the situation then shifts to ordinary assessment, by tax return. The exact conditions of this shift, and the special cases, are described in the DFTA and the THA, which you can consult on fedlex.admin.ch — DFTA and fedlex.admin.ch — THA.
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Correcting: rectification and subsequent ordinary assessment
This is the least known part, and the most useful. If you believe the deduction made does not match your situation — an unsuitable scale, deductions not taken into account, an event not reflected — you can request a rectification from the authority, in the forms and within the deadlines set by law, recalled on the cantonal page. Since the reform that entered into force in 2021, the system also revolves around subsequent ordinary assessment: in some situations it is mandatory, in others it can be requested, and it allows you to assert elements that mere withholding ignores. For persons domiciled in Switzerland, a subsequent ordinary assessment, once triggered, then applies to the following years; persons domiciled abroad must, on the other hand, renew their request each year. We mention here no income threshold, no deadline and no collection commission: these parameters appear on the linked official pages and change regularly. The ge.ch — Tax at source page sets out the procedure and the deadlines applicable in the canton.
Why it is worth looking into
Because a miscalibrated withholding costs, in either direction. Too favourable a scale prepares a back-payment; an unfavourable one needlessly ties up cash and deprives you of deductions to which you are entitled. For a household with multiple incomes, evolving family situations or wealth elements, the gap between the automatic withholding and the tax actually due can be significant. A careful reading of your situation, each year, turns a formality endured into a checkpoint under control.
Our role: order, connect, keep the calendar
Ridger does not replace the administration or your tax adviser: we do not issue any assessment decision and guarantee no outcome. Our contribution is organisational. We help you gather the elements of a rectification request, not miss deadlines, liaise between the employer, the tax authority and, where relevant, your tax specialist, and document changes in your situation through the year. It is the discipline of a family office applied to a matter most households leave to chance. Let's talk about your tax situation.
The scales, thresholds and deadlines mentioned are amended regularly: the linked official page prevails, and we verified them on 2026-09-20.