Swiss withholding tax: corrections, refunds and the subsequent ordinary assessment

Two procedures that are not interchangeable

Art. 137 para. 1 DBG gives the taxpayer the right to demand a decision on the existence and extent of the tax liability until 31 March of the tax year following the due date of the payment — either because they disagree with the deduction shown on the employer's statement, or because they never received that statement. This is the legal hook for what practice calls a recalculation.

Circular No. 45 narrows it to three fact patterns and says so explicitly: the list is exhaustive. A wrongly determined gross salary; a wrongly determined rate-determining income, which is the figure used to pick the percentage when the pay is irregular, part-time or split across employers; and a wrong tariff. Everything else is the other procedure.

The subsequent ordinary assessment replaces withholding for the whole year with an ordinary tax return. You declare, the authority assesses, and the tax already withheld is credited against the result. It is the only door to deductions — and, unlike the recalculation, it is a door that locks behind you.

Where the overpayment usually comes from

The deduction is not an individually computed amount. It is a percentage taken from a table, and which table applies is decided by the tariff code: A for single people without children in the household, B for married couples with one earner, C for married couples with two earners, H for single parents, plus a digit for child allowances and a letter for church tax liability (Art. 1 QStV).

Circular No. 45 also prescribes what an employer does when the employee has not reliably documented their personal circumstances: code A0Y for single people and for employees whose civil status is undetermined — no children, with church tax — and C0Y for married employees. Both are the expensive variants, and both stay in place until somebody corrects them.

Correcting them is the employee's duty, not the employer's. Art. 5 para. 3 QStV requires employees to report to the employer any change in the circumstances that determine the withholding tax; the circular spells out what it means by that — civil status and changes to it, taking up or giving up a second job, number of children, religious denomination, and whether the other spouse works. A marriage, a birth or leaving a church that nobody passes on costs money from the following month, and the money comes back only through a recalculation.

What the tariff already contains — and what it never will

The tariff is not stingy, it is flat-rate. Art. 85 para. 2 DBG provides that flat rates for professional expenses and for insurance premiums, and the deductions for family responsibilities, are taken into account when the rate is set. The circular adds that the tariffs also contain flat deductions for ordinary employee contributions to occupational pensions and to non-occupational accident insurance — and that no correction is made if the pension fund rules split the contributions differently.

What the tariff does not contain is listed by the canton of Zurich on its page for the subsequent ordinary assessment: actual professional expenses including weekly-residence costs, buy-ins to the occupational pension scheme, pillar 3a contributions, self-funded education and training costs, third-party childcare costs, maintenance payments, debt interest, and illness- or disability-related costs. All of that exists only inside an ordinary assessment.

There is one narrow exception in the ordinance. A person paying maintenance can ask, under Art. 11 para. 1 QStV, that the authority soften the hardship by granting child allowances inside the tariff up to the amount of those payments — the circular's own worked example turns code A0N into A5N.

The subsequent ordinary assessment has a price

It is a change of tax regime, not a refund form, and it has three consequences worth knowing before signing. It cannot be withdrawn (Art. 10 para. 1 QStV). It does not stop at the disputed year: through Art. 89a para. 5 in conjunction with Art. 89 para. 5 DBG, ordinary assessment continues until withholding tax liability ends. And the outcome is genuinely open, because worldwide income is used to determine the rate.

The tax office of Ticino states the consequence plainly on its own procedure page: the recalculation or the ordinary assessment takes into account, for the purpose of the applicable rate, all worldwide income — income from securities, the imputed rental value of a main residence, and any other income earned in the state of residence or elsewhere. An employee with property abroad can end up owing more than was withheld.

Procedural duties come with it. If the return is not filed even after a reminder, the authority assesses at its dutiful discretion and may impose a fine for breach of procedural duties under Art. 174 DBG. Meanwhile the employer keeps deducting; that deduction simply becomes an advance payment against the ordinary tax, credited without interest.

Above CHF 120,000 the choice disappears

Where gross income from employment reaches at least CHF 120,000 in a tax year, the subsequent ordinary assessment is compulsory: that is the amount the Federal Department of Finance fixed in Art. 9 para. 1 QStV for Art. 89 para. 1 let. a DBG. Dual-earner couples are not added together — para. 3 tests the gross income of each spouse separately. Where liability covers only part of the year, periodic salary is converted to twelve months under Art. 40 para. 3 DBG.

Once inside, you stay inside. Art. 9 para. 4 QStV keeps the ordinary assessment running until the end of withholding tax liability, regardless of whether the gross income later falls below the threshold temporarily or permanently, and regardless of divorce or separation.

The second compulsory case has nothing to do with salary level. Anyone with income not subject to withholding tax — self-employed side income, maintenance received, orphan's or widow's pensions, income from assets — is assessed in the ordinary procedure too and must request the tax return forms by 31 March under Art. 89 para. 4 DBG. Zurich puts cantonal figures on it: other income above CHF 3,000, or assets above CHF 80,000, and CHF 160,000 for jointly assessed persons.

Sometimes the employer just pays it back

Not every case needs a procedure. Art. 138 para. 2 DBG covers the simplest one: where the debtor of the taxable benefit — normally the employer — has deducted too much tax, it must repay the difference to the taxpayer. While the month in question has not yet been settled with the authority, payroll fixes it.

Once it has been settled, Art. 7 QStV takes over: the competent tax authority may refund the surplus directly to the taxpayer. That is why the canton of Zurich asks a correction applicant for an IBAN alongside personal details, the AHV number, the salary certificates for the year and the monthly payslips.

Two points are regularly underestimated. Under Art. 137 para. 3 DBG the employer must continue to deduct until the decision is final, so opening a procedure stops nothing. And a decision on withholding tax can be challenged: Art. 139 para. 1 DBG opens the ordinary objection route of Art. 132.

The canton runs the procedure — it does not own the deadline

31 March appears four times in federal law: Art. 137 para. 1 DBG for the decision, Art. 89 para. 4 and Art. 89a para. 3 for the assessment, Art. 99a para. 1 for people resident abroad. Art. 49 para. 2 and Art. 33b para. 3 of the Tax Harmonisation Act repeat it for cantonal and communal taxes. People leaving Switzerland get less: under Art. 89a para. 3 DBG the deadline ends when they deregister.

How you file differs. Zurich accepts applications for a withholding tax correction and for a subsequent ordinary assessment only electronically through its ZHservices portal and states that the deadline cannot be extended. Geneva runs both on a single form, the DRIS/TOU, filed from the tax section of the e-démarches account or on the paper version sent by post, and states that without it the tax withheld becomes definitive, subject only to a correction on the authority's own initiative. Ticino splits them across two online forms and keeps a simplified recalculation route open for B permit holders where the deduction or the table applied was wrong.

Residents abroad face one hurdle no canton can waive. The ordinary assessment presupposes quasi-residence — as a rule at least 90 per cent of worldwide gross income taxed in Switzerland, spouse's income included (Art. 14 para. 1 QStV) — and Art. 99a para. 1 DBG requires a fresh request for every tax period. For cross-border commuters within the meaning of Art. 2 let. b of the Switzerland–Italy agreement of 23 December 2020, Art. 14 para. 3 QStV excludes it altogether.

What the numbers look like

The Federal Tax Administration publishes the tariffs every year as a file for payroll systems. We read the same 2026 release for our own withholding tax calculator, which makes the size of a tariff-code dispute measurable rather than rhetorical. In the canton of Zurich, at a gross monthly salary of CHF 8,000, the rate is 8.66 per cent under code A0N, 4.77 per cent under A2N and 2.78 per cent under H2N — the gap between the first and the last is 5.88 percentage points, roughly CHF 470 a month.

Church tax inside the code is the smaller but far more common item. At the same salary the Y variant costs 0.22 percentage points more than the N variant in Zurich, but 1.12 points in St. Gallen — about CHF 90 a month there, or a little over CHF 1,000 a year. Twenty cantons publish both variants; in Fribourg the two 2026 tables are identical, Geneva, Neuchâtel, Ticino, Vaud and Valais publish only the variant without church tax, and Jura only the one with it.

The largest single factor is the canton itself. At the same CHF 8,000 a month and the same code A0N, the 2026 rate runs from 4.25 per cent in Zug to 15.43 per cent in Neuchâtel. Which canton settled your withholding tax is therefore not a detail: competence for the recalculation lies with the entitled canton, which under Art. 38 of the Tax Harmonisation Act is in principle the canton where the employee was resident or staying when the payment fell due.

The tariff code is most of the answer

The percentage on your payslip is not a judgement about you. It is a cell in a table, and which cell applies is decided by a three-character tariff code. Article 1 of the Withholding Tax Ordinance defines the letters plainly. Code A: single, divorced, judicially or in fact separated and widowed persons who do not live in the same household as children or dependants. Code B: married couples living together where only one spouse is in gainful employment. Code C: married couples living together where both are. Code H: single, divorced, separated and widowed persons who live in the same household as children or dependants and provide the main part of their upkeep. The digit after the letter is the number of children attracting the child deduction; the final letter is Y or N for church tax liability.

The distance between those codes is not marginal. In the canton of Geneva, on a gross monthly salary of CHF 8’000 in 2026, code A0 costs 12.94 per cent. The same salary under A1 — one child — costs 9.00 per cent, and under A2, two children, 5.11 per cent. A married sole earner on code B0 pays 5.56 per cent. A single parent with one child on H1 pays 3.53 per cent. That is a spread of more than nine percentage points of gross pay, on an identical salary, in an identical canton.

One code regularly surprises people: C, for married couples where both spouses work, is higher than A in several cantons — 12.08 against 12.94 in Geneva, and 9.20 against 8.66 in Zurich. That is not an error. Article 85 paragraph 3 requires the dual-earner tariff to be calculated on the combined income of the spouses, because that combined income is what determines the rate in a system with progressive tariffs. The tariff assumes a second salary it cannot see.

Church tax is the smallest of the levers and the only one you choose. In Zurich the gap between code A0 without church tax and A0 with it, at CHF 8’000, is 0.22 percentage points; in Zug 0.19. At the other end, St. Gallen is 1.12 and Solothurn 0.99. Five cantons — Geneva, Neuchâtel, Ticino, Vaud and Valais — publish no church-tax variant at all, and Jura publishes only the church-tax version.

Where the job is decides what you pay

Withholding tax is federal in its definition and cantonal in its amount. The Federal Tax Administration sets the framework and publishes the tariffs; the cantons levy the tax, and the employer hands it to the competent cantonal tax authority. The result is a range wide enough to matter when you compare two offers. For code A0 on a gross monthly salary of CHF 8’000 in 2026, the rate runs from 4.25 per cent in Zug to 15.43 per cent in Neuchâtel. The unweighted average across all 26 cantons is 11.48 per cent.

For an English speaker looking at the Swiss market, the geography is unusually concentrated — and it happens to sit on the cheaper side of that range. Of the adverts in our own listings that are written in English and name a place we can resolve to a canton, 43.5 per cent are in Zurich, 18.3 per cent in Geneva, 9.4 per cent in Basel-Stadt, 6.7 per cent in Vaud and 5.8 per cent in Zug — five cantons carrying 83.7 per cent of them. Weight the 2026 code A0 rates at CHF 8’000 by where those English-language adverts actually are, and the average comes out at 10.59 per cent. Do the same for French-language adverts, which sit overwhelmingly in Vaud, Geneva and Fribourg, and it comes out at 13.46 per cent.

Nearly three percentage points of gross pay, decided by nothing except which linguistic region a job happens to be in. It is worth knowing before you read a gross figure in an advert as if it were comparable across the country.

The concentration also runs the other way. Within Zurich, 42.6 per cent of the adverts in our listings whose language we can determine are written in English; in Zug it is 50.0 per cent and in Geneva 53.5 per cent, against 7.9 per cent in Bern and 2.7 per cent in Thurgau. The cantons where an English-language job search works are, with the exception of Geneva and Vaud, also the cantons with the lower withholding rates.

When the monthly deduction is not your final tax bill

For many people taxed at source the deduction is the end of it, and article 89a paragraph 4 says so bluntly: if no subsequent ordinary assessment is requested, withholding tax takes the place of the direct federal tax on employment income that would otherwise be assessed under the ordinary procedure, and no additional deductions are granted afterwards. That is the price of the simplicity. Childcare costs, voluntary pension-fund purchases and third-pillar contributions have no place in a tariff.

Above a threshold the choice disappears. Article 89 paragraph 1 letter a requires a subsequent ordinary assessment when gross income reaches or exceeds a set amount in a tax year, and article 9 of the ordinance puts that amount at CHF 120’000 of gross income from employment — CHF 10’000 a month over twelve monthly salaries. For dual-earner couples it is enough that one spouse's gross income reaches it. And it sticks: paragraph 4 keeps the ordinary assessment running until the end of your withholding tax liability, even if the income later falls back below the threshold, and even through a divorce or separation.

The same obligation is triggered, at any income, by article 89 paragraph 1 letter b — having income that is not subject to withholding tax at all. Anyone in that position has to ask the competent authority for the tax return form by 31 March of the year following the tax year.

Below the threshold it is a right rather than a duty. Article 89a and article 10 of the ordinance let you file a written request for a subsequent ordinary assessment by 31 March of the following year; for people leaving Switzerland the deadline ends at deregistration. One property of that request deserves attention before you file it: it cannot be withdrawn. If it turns out that your deductions were worth less than the ordinary assessment costs you, that is settled.

If what you are disputing is the deduction itself, the route is different again. Article 137 paragraph 1 lets the taxpayer demand a ruling on the existence and extent of the tax liability, by 31 March of the tax year following the one in which the payment fell due, either because they disagree with the deduction shown on the employer's attestation or because they never received that attestation. Where the employer withheld too much and has already settled with the authority, article 7 of the ordinance allows the authority to refund the difference directly to the taxpayer.

People living abroad have their own version. Article 99a lets those taxed under article 91 request a subsequent ordinary assessment for each tax period by 31 March of the following year, where the predominant part of their worldwide income — including their spouse's — is taxable in Switzerland, where their situation is comparable to that of a resident taxpayer, or where such an assessment is needed to claim deductions provided for in a double taxation agreement. Article 136a requires them to supply the necessary documents and a Swiss delivery address.

What the percentage does not tell you

The rate applies to gross pay, but the gross pay of a single month is not always what determines the rate. Article 85 paragraph 4 hands the Federal Tax Administration, together with the cantons, the job of setting uniformly how the thirteenth month's salary, bonuses, irregular employment, hourly pay, part-time work and secondary employment are to be treated, and which elements determine the rate. The same paragraph covers tariff changes, retroactive salary corrections, and payments made before employment starts or after it ends. If you work part-time or hold more than one job, that is why the percentage often looks wrong against the amount actually paid out.

The published tariffs are also capped. Each canton's file for code A0 ends at a highest rate — 20.00 per cent in Zug, 31.27 per cent in Zurich, 40.52 per cent in Geneva. Anyone earning at that level is long past the CHF 120’000 threshold and will be assessed under the ordinary procedure anyway, so the ceiling mostly matters for part-year cases and one-off payments.

And one thing the deduction says nothing about at all is whether the gross figure was any good. Tax scales with the salary; it does not judge it. The only way to answer that is to compare the offer with what Swiss employers are actually advertising for the same role.

The permit answers a different question

The most common mistake is to read the tax rule off the permit. The Federal Tax Administration's information sheet on the new agreement with Italy answers it in one word: no, the tax definition is not the same as the one the cantonal migration offices use. People with Swiss nationality who need no permit at all, or who hold a different residence permit, can be cross-border commuters for tax purposes if they meet the conditions — and a Swiss citizen living in Italy who meets all of them counts as one.

The canton of Vaud puts the same separation the other way round in its directive for employers: simply holding a cross-border permit is not relevant, for tax purposes, to whether someone qualifies as a commuter under the 1983 agreement. Vaud also makes the employer responsible for checking that every condition is met — and if they are not, the employer must withhold.

What does decide is residence, plus a set of conditions that differ by treaty: where your main tax domicile is, how far it lies from the border, how often you go home, and whether you can produce the certificate the treaty asks for. Miss any of them and you do not lose your permit — you lose the special rule, and the ordinary cantonal tariff takes over.

Germany: taxed at home, with a 4.5 per cent slice left in Switzerland

Article 15a paragraph 1 reverses the usual order. Salaries and similar remuneration of a cross-border commuter may be taxed in the state where the commuter is resident; by way of compensation, the state where the work is done may levy a tax at source, and that tax may not exceed 4.5 per cent of the gross amount, provided residence is proven by an official certificate from the German tax authority. Germany then credits the Swiss deduction against German income tax and takes it into account when setting prepayments.

The certificate is the whole condition, not a formality. Circular 45 names the forms — Gre-1 for the residence certificate, Gre-2 for its renewal, one per calendar year, handed to the employer. If the form is missing, the ordinary withholding tariffs apply: codes A, B, C, E and H instead of the capped codes L, M, N, P and Q that the ordinance reserves for commuters under the German agreement.

The gap between the two is large at a normal Swiss salary. At CHF 6,500 gross a month on code A0N — single, no child allowance, no church tax — the 2026 rate is 7.28 per cent in Zurich, 8.40 in Aargau, 9.25 in Schaffhausen, 10.18 in Thurgau, 10.59 in St. Gallen, 10.63 in Basel-Landschaft, 11.33 in Basel-Stadt and 12.59 in Solothurn. Every one of those sits above 4.5 per cent, so the ceiling always bites. It stops mattering only well down the scale: the ordinary rate reaches 4.5 per cent at roughly CHF 2,950 a month in St. Gallen, CHF 3,600 in Basel-Stadt and only around CHF 4,250 in Zurich.

The second German peculiarity is the count of nights. Under article 15a paragraph 2, commuter status falls away only if, across a full calendar year of employment, you fail to return to your German home on more than 60 working days for reasons connected with the work. Those non-return days are certified by the employer on form Gre-3, which goes to the cantonal tax administration; it then orders a recalculation, and under- or over-deducted withholding tax is claimed back or refunded.

Italy: one agreement, three categories of commuter

The agreement of 23 December 2020 on the taxation of cross-border commuters entered into force on 17 July 2023 and has applied since the following calendar year. For the first time it defines who is covered: a person tax-resident in a municipality lying wholly or partly within a 20 km strip along the border, working in the border area of the other state for an employer resident there, and returning in principle every day to their main tax domicile. On the Swiss side, the border area is Graubünden, Ticino and Valais and nothing else.

For new commuters, article 3 paragraph 1 gives the taxing right to the state where the work is done, but caps the tax at 80 per cent of what would otherwise be due there — and the state of residence taxes the same income and removes the double taxation. Swiss law implements this in one sentence of the withholding tax ordinance: the withholding tax of these commuters amounts to 80 per cent of the tax under the tariff code whose conditions they meet. The codes are R, S, T, U and V; the old code F for Italian commuters, still described in Circular 45, was repealed at the start of 2024.

In 2026 tariff terms, Ticino charges 10.90 per cent on code A0N at CHF 6,500 a month, so a new commuter is charged 8.72 per cent — a difference of CHF 141.70 a month. In Graubünden it is 9.01 against 7.21 per cent, in Valais 9.88 against 7.90. Reading that as a saving is premature: the twenty per cent Switzerland gives up is normally collected by the Italian assessment that follows.

The second category is the so-called old commuters. Article 9 keeps salaries of Italian residents who were employed in the Swiss border area at entry into force, or at any point between 31 December 2018 and that date, taxable in Switzerland only. They keep the ordinary codes A, B, C and H — and in exchange the cantons of Graubünden, Ticino and Valais transfer 40 per cent of the gross tax to the Italian border municipalities every year until the tax year ending 31 December 2033.

The third category rarely gets mentioned, and it is the expensive one. The Ticino tax administration's own overview lists commuters not covered by the agreement at all: people living in an Italian municipality outside the official list, or returning home only once a week. They pay the full ordinary tariff in Switzerland, fall under the automatic exchange of information, and are assessed on the same income in Italy with a credit for the Swiss tax. It is the only combination that carries both disadvantages at once.

France: eight cantons that deduct nothing, and Geneva

Article 17 paragraph 4 of the 1966 convention makes the agreement of 11 April 1983 on the taxation of cross-border workers' remuneration an integral part of the treaty. The agreement itself is three short articles. The first makes such salaries taxable only in the country of residence, against financial compensation to the other state. The second sets that compensation at 4.5 per cent of the total annual gross remuneration. The third defines a cross-border worker as someone resident in one state who works in the other for an employer established there and returns home, as a rule, every day.

The list of cantons is what makes the rule bite. The Federal Council signed on behalf of Bern, Solothurn, Basel-Stadt, Basel-Landschaft, Vaud, Valais, Neuchâtel and Jura. If you live in France and work for an employer in one of those eight, no withholding tax is deducted from your salary at all — provided the residence certificate stamped by the French tax authority reaches your employer in two copies. Vaud's directive is blunt about the alternative: without the certificate, the employer must withhold. It also asks for genuine daily return, meaning at least four working days a week on a full-time contract, and notes that 45 nights spent outside the country of residence do not put the status at risk.

Geneva sits outside the agreement, and the difference is the whole tax bill. The canton explains it on its own page about the compensation it pays: under the 1966 convention the remuneration of cross-border workers is taxed in the state where the employment is exercised, so Geneva taxes residents of Ain and Haute-Savoie who work in the canton and transfers 3.5 per cent of their gross payroll to France under the 1973 agreement. Other cantons, it adds, do the opposite under the 1983 agreement.

Measured on one salary, that reads: at CHF 6,500 a month on code A0N a Geneva employer deducts 10.80 per cent, while for the same person with the same French address and the same certificate an employer in Lausanne, Basel or Neuchâtel deducts nothing. Same treaty, same border, same permit — different canton.

Working from home is what breaks the status

For a commuter, home office is not a scheduling question but a status question, and the three borders count it differently. The additional protocol to the Italian agreement allows up to 25 per cent of working time to be performed as telework from home in the country of residence without any change of status; those days are attributed, for tax purposes, to the days worked at the employer's premises. It applies expressly to the old commuters under the transitional rule too. The clause was revised by the protocol of 6 June 2024, has been applied since the beginning of 2024 and entered into force on 9 February 2026.

The French threshold is higher and the mechanism is different. The additional protocol on salaried employment performed as telework, inserted by the amendment of 27 June 2023 and in force since 24 July 2025, treats telework from the country of residence as performed at the employer's premises up to 40 per cent of working time per calendar year. The state that gets to tax it pays the state of residence compensation of 40 per cent of the tax on that portion; where the employer is in Geneva, the compensation covers only the slice of telework between 15 and 40 per cent. Cross the 40 per cent line and paragraphs 1 to 3 of article 17 apply from the very first telework day, with no compensation due.

Germany has no such percentage at all. Article 15a already assigns the income to the country of residence and caps the Swiss deduction, so there is nothing to split. What the article counts is days without a return home, and no more than 60 of them in a calendar year. A day at the kitchen table in Lörrach is by definition not a day without a return; an assignment that keeps you overnight in Geneva is.

The 90 per cent rule, and the door that is shut for Italian commuters

People living abroad who are taxed at source can sometimes ask for an ordinary assessment instead, which lets them claim deductions the tariff does not contain. The condition is quasi-residence: as a rule, at least 90 per cent of worldwide gross income — including a spouse's — must be taxed in Switzerland, and the written request has to reach the cantonal authority by 31 March of the following year. Once filed it cannot be withdrawn.

Circular 45 works through an example that shows how easily the threshold is missed. A person resident in France earns a Swiss gross salary alongside rental income from a French property, small amounts of bank interest and maintenance payments from a former spouse. Only the employment income is taxable in Switzerland, which comes to 75.7 per cent of the worldwide total — so the person is not quasi-resident, and the request fails.

For one group the door is not merely narrow but shut. The ordinance states that no subsequent ordinary assessment on grounds of quasi-residence may be carried out for cross-border commuters as defined in article 2 letter b of the Swiss-Italian agreement — and the following article extends the same bar to assessments opened by the authority of its own motion. The exchange of letters attached to the agreement says the same thing from the treaty side: the withholding tax is the only form of taxation for these commuters. Deductions are meant to be claimed in Italy instead.

Austria and Liechtenstein: the two borders nobody writes about

Commuting from Vorarlberg to St. Gallen or Graubünden, you will look for a commuter clause in the Austrian agreement and not find one. Article 15 paragraph 4 used to contain it; the protocol of 21 March 2006 repealed it with effect from early February 2007. Since then the basic rule of paragraph 1 governs: if the work is done in Switzerland, the remuneration may be taxed here — ordinary withholding tariff, no ceiling, no certificate procedure.

Liechtenstein runs the opposite way. Article 15 paragraph 4 of the 2015 agreement provides that employment income of people who live in one state, work in the other and travel there on each working day as a rule is taxable only in the state of residence. For the daily traffic between the Rhine valley and Vaduz, the question is where you sleep, not where you clock in.

Both cases make the same point as the three big ones. There is no Swiss cross-border commuter rule. There are five treaties that disagree on this exact point, and the only reliable route to an answer runs through the question of which state you are tax-resident in.

What the job ad says about any of this: nothing

You might expect adverts near a border to raise the subject. They do not. Across the Swiss vacancies currently advertised on our site, not one title or short description contains the words cross-border commuter, frontalier, frontaliere or permit G — not in the Graubünden, Ticino and Valais adverts, and not in the Geneva ones either. Of all adverts, 0.02 per cent mention withholding tax at all, and those are payroll and tax specialist roles: people hired to calculate it.

Where the jobs sit is easier to quantify. Of the adverts whose location resolves to a canton, 49.1 per cent are in the nine cantons along the German border and 36.3 per cent in the eight cantons of the 1983 agreement; Geneva alone accounts for 9.7 per cent. The Italian border area of the agreement — Graubünden, Ticino and Valais together — comes to 5.5 per cent. The regime that generates the most commentary covers the smallest slice of the market.

The language of the advert traces the same borders. In Ticino, 62.6 per cent of adverts are written in Italian; in Geneva, 41.2 per cent are in English and 34.0 per cent in French, against 41.9 per cent German across the country as a whole. Two things follow for an application. The language of the advert tells you more about the working day than the canton name does — and the tax side of your commute gets settled after the offer, with the tax administration of the canton you work in, not during the hiring process.