Individual Taxation Reform Switzerland 2026: What Married Expats Need to Know

What the current system looks like

Under Switzerland's existing direct federal tax rules, married couples and registered partners are taxed jointly. This means the tax administration adds together both spouses' incomes and applies a single tax rate on the combined total.

Because Switzerland uses a progressive tax system, adding two incomes together pushes the couple into a higher marginal tax rate than either spouse would face individually. This is the so-called marriage penalty — and it can cost married couples thousands of francs per year compared to unmarried partners living together.

The penalty is most visible for dual-income couples where both partners earn a substantial salary. A couple with two incomes of CHF 80'000 each can pay significantly more tax when married than if they were taxed as two single individuals. The Swiss tax at source vs ordinary assessment guide explains the mechanics of how Swiss taxes are calculated.

What the reform changes

The individual taxation reform separates the tax calculation for married couples. Instead of one joint return, each spouse files their own tax return with their own income, deductions, and tax rate applied individually.

This means the second earner — often a woman who returned to work part-time after children — is no longer taxed at her partner's high marginal rate. Her income falls into lower tax brackets, which can mean more take-home pay and a stronger incentive to increase working hours.

The reform also impacts deductions. Currently, married couples receive a special double deduction for certain items. Under individual taxation, each spouse claims their own deductions — such as Pillar 3a contributions, professional expenses, and insurance premiums — against their own income. The Pillar 3a maximum contribution guide and health insurance tax deductions guide explain two of the largest deduction categories for expats.

For expat couples on B or C permits, the impact depends on whether they are taxed at source or file an ordinary tax return. Many expats already face the marriage penalty indirectly through their source tax tariff, which uses combined salary bands. Individual taxation should reduce the effective rate for many dual-income expat families.

Who wins and who loses

Dual-income couples, especially those where both partners earn similar amounts, are the clearest winners. A married couple with two salaries of CHF 90'000 each could see their federal tax bill drop by several thousand francs per year. Secondary earners — often women in part-time roles — gain the most because their income is currently taxed at the primary earner's high marginal rate.

Single-earner couples with a large income gap may see little change or even a slight increase. The reform removes some marriage-specific deductions, and a single high earner no longer benefits from spreading the tax burden across two people. However, cantons have flexibility in how they implement the reform, and many are expected to introduce compensation measures for single-earner families.

Pensioners and retirees are also affected. Married pensioners currently file jointly, which can push their combined pension income into higher brackets. Individual taxation allows each pensioner's income — AHV, second pillar annuity, and third pillar withdrawals — to be taxed at their own rate. For expats planning retirement withdrawals, the top-slice effect guide for Pillar 3a explains how progressive tax rates impact large lump-sum withdrawals.

Same-sex registered partnerships and marriages are treated identically to opposite-sex couples under Swiss tax law. All spouses and registered partners will benefit from the shift to individual filing.

Timeline and what to do now

The reform was passed by the Federal Assembly and, after the popular vote on 8 March 2026, entered the implementation phase. The Federal Council and cantonal tax administrations are currently working on the technical adjustments to IT systems, tax forms, and withholding tax tariff tables.

Implementation is scheduled to take effect by 1 January 2032 at the latest. This transition period allows the federal government and cantons to adapt their legislation, IT systems, and withholding tax tariffs. Cantons may choose to implement the reform earlier than the federal deadline.

For the 2026 tax year, joint taxation still applies. Married couples should continue filing jointly and plan their deductions accordingly — the current Swiss tax at source vs ordinary assessment guide and Swiss salary certificate (Lohnausweis) guide cover the existing filing process.

When the reform takes effect, married couples will need to adjust their record-keeping. Each spouse should maintain separate documentation for income, deductions, and assets. This is especially important for expats with cross-border income, foreign bank accounts, or declaring foreign assets in Switzerland. Start separating your financial paperwork now to make the transition smoother.