Frontier changes canton: the tax implications

Context

In brief

• Changing canton requires modification of the G permit and notification to SECO and the destination canton
• Withholding tax remains exclusively in Switzerland (no double taxation)
• Old cross-border workers keep the €7,500 exemption until 2033; new ones receive a €10,000 allowance

Key facts

• What: Change of canton of work for cross-border workers (e.g., Ticino → Graubünden) and administrative procedures
• When: From 1 January 2024 (new Cross-Border Workers Agreement in force)
• Where: From Canton Ticino to Graubünden or other Swiss cantons
• Who: Cross-border workers regulated by Law 83 of 13 June 2023
• Amount: Withholding tax retained solely in Switzerland; exemption €7,500 (old) or €10,000 (new)
• Legislation: New Cross-Border Workers Agreement (23 December 2020, Italian-Swiss Convention 9 March 1976)

Changing the canton of work for an Italian cross-border worker is not a simple contractual modification. It involves revisions to the G permit, adjustments to withholding tax, and checks on administrative deadlines with the competent authorities. Unlike what is sometimes assumed, the withholding tax on employment income remains exclusively in Switzerland. There is no 'double taxation in both countries': Italy avoids double taxation by using the foreign tax credit in the CE section of the income tax return (model 730).

The transition between cantons involves administrative searches with SECO (Swiss State Secretariat for Economic Affairs), USTAT (Ticino Statistical Office), and the competent cantonal tax administrations, especially to verify communication times. From 1 January 2024, the procedures for this transition are formalized according to the regulatory framework of Law 83 of 13 June 2023.

G Permit and Change of Canton

The condition of the G permit (cross-border work authorization) is linked to the place of employment and the duration of the contract. A change of canton does not automatically invalidate the permit but requires timely notification to the competent authorities: in Switzerland to SECO and the destination canton (e.g., Graubünden), in Italy to INPS through a declaration by the new employer. If the transition occurs at the beginning of the calendar year, notifications must already be made in December of the previous year. The cross-border worker does not submit applications but is the responsibility of the Swiss employer to manage the authorization procedure with the federal and cantonal authorities.

Withholding Tax: What Does NOT Change

Many cross-border workers believe that changing cantons involves a 'recalculation of withholding tax from scratch.' Instead, the rate is set by the canton of employment based on marital status, annualized gross income, and specific exemptions. It remains retained solely in Switzerland. According to the new 2024 agreement, old cross-border workers (already employed before 17 July 2023) keep the €7,500 exemption, with a transitional regime until 2033. New cross-border workers benefit from a €10,000 allowance. The continuity of the exemption is guaranteed by Law 83/2023, regardless of the change of canton.

Operational details

The change of canton is not instantaneous from a tax and administrative point of view. Communication to the new canton and cancellation of registration in the previous canton require a lag of 1-3 months, depending on the speed of the cantonal authorities. During this transitional period, the cross-border worker may receive two pay slips: one from the old canton (with termination of the relationship) and one from the new canton (with start of employment). It is essential to keep all pay slips from both periods for the annual declaration: the INPS and the Italian Revenue Agency will have to reconcile the periods of employment in order to avoid double deductions or contribution gaps.

Variations in cantonal taxation between Ticino and Graubünden

The cantonal withholding tax rates vary considerably between Ticino and Graubünden. Although both are Swiss cantons, the cantonal withholding tax can differ by 2-3 percentage points, at the same gross income. A cross-border worker moving from Ticino to Graubünden does not experience 'double taxation': the new canton simply applies its rate from the first day of employment. No 'retroactive recovery' from the old canton.

However, variations in local allowances or in the calculation of pension contributions (AVS/AI/IPG for employee: 5.3%; AD/AC: 1.1%; LAINF: 0.7-1.5%; LPP for age group from 25 years: 7-18%) can affect the net pay slip. The SUVA (Swiss National Accident Insurance Institute) has a standardized national taxation, while the LPP (professional pension insurance) is managed by cantonal funds: the new employer in Graubünden may have an LPP fund with slightly different rates compared to the previous Ticino fund.

Impact of commuting on costs and border crossings

The change of canton from Ticino to Graubünden implies a completely different commuting route. If the cross-border worker works in Lugano or Mendrisio (Ticino), he normally uses the Brogeda border crossing (Ticino-Italy border) or Gaggiolo. Moving to Graubünden (for example, Chur or Davos), the route changes: the commuter may use different border crossings or routes, with implications for transit times, car vignette costs, and tax deductibility of transport costs. In Italy, the costs incurred to reach the cross-border workplace are partially deductible from the model 730, but only if documented and consistent with the verified route.

Furthermore, if the change of canton implies a change of residence in Italy (for example, from Como to Sondrio), a coordination issue arises between Swiss legislation (G permit linked to the workplace) and Italian legislation (tax residence linked to residence). The Italian-Swiss Convention of 9 March 1976 provides that employment income is taxable in the country where it is performed — and therefore remains in Switzerland — but the Italian tax residence must be updated with the Municipality and subsequently with the Revenue Agency.

Useful planning tools

To estimate your pension strategy, use the pension planner and the pillar 3 simulator.

Key points

Administrative checklist: step-by-step cantonal change

1. Communication to the new employer (Graubünden): The new Swiss employer (Graubünden) must submit a G permit request and a notice of employment to the SECO and the competent cantonal authority. This communication is the responsibility of the employer, not the cross-border commuter, but the commuter must ensure that the employer is aware of the procedure and deadlines.

2. Revocation of the G permit from the old canton (Ticino): Simultaneously, the previous Ticino employer communicates the termination of the employment relationship to the Ticino authorities. The revocation is automatic if the relationship ends, but it may take 2-4 weeks to be processed by the cantonal administrations.

3. Notification to INPS: The new Swiss employer notifies INPS (Italian side) of the cantonal change within the legal deadlines. In Italy, this notification is made through the 'Visura INPS' form or equivalent, to ensure the continuity of pension contributions.

4. Update with the Tax Agency: If the cross-border commuter has changed their Italian tax residence (e.g., moving residence), they must notify the municipality of residence (registry office) and subsequently the Tax Agency through the 'AA9/12' form or equivalent.

5. Verification of the exemption threshold: If the cross-border commuter is an 'old cross-border commuter' (employed before July 17, 2023), they retain the €7,500 exemption with a transitional regime until 2033. If they are a 'new cross-border commuter', the threshold is €10,000. This information should be verified with the new employer and the Graubünden cantonal administration.

6. LAMal: right of option for health insurance: The cross-border commuter with a G permit has the right to choose between Swiss health insurance (LAMal) or to remain in the Italian system (CMI/SSN). If they stay in Italy, they do not pay Swiss LAMal contributions. If they opt for LAMal, they must communicate their choice to the new employer and the Graubünden health insurance fund. The adult deductibles in LAMal range from CHF 300 to CHF 2,500 per year.

Critical deadlines

• Before the change: communicate the termination date to the previous employer with notice according to the Swiss national contract (usually 1-3 months).
• Within the month before the new position: verify that the new employer has submitted the permit request to the SECO.
• Within 30 days from the start of the relationship: the new canton must confirm the authorization.
• Within 90 days: all notifications must be processed (INPS, Tax Agency).

To verify the impact on withholding tax with the new Graubünden cantonal rate, use our salary calculator — simulate the pay slip based on gross income and the new cross-border status. If you have doubts about double taxation or managing the tax return with the new canton, consult the guide to cross-border refunds, which explains how the foreign tax credit works on the 730 form. To evaluate whether the cantonal change is convenient compared to alternatives, the G permit comparator helps to assess whether a different solution (e.g., moving residence and B permit) is more advantageous.