For nearly a century, the Swiss tax system has operated on a quirk of logic that often left homeowners scratching their heads: the concept of “imputed rental value.” It required owners of primary residences to pay income tax on a theoretical rent they would have earned if they didn’t live in their own homes. It was a system designed for fairness—intended to ensure that homeowners weren’t unfairly advantaged over renters—but it created a complex web of tax incentives that encouraged high debt and discouraged the full repayment of mortgages.
That era officially came to an end on September 28, 2025, when Swiss voters approved the abolition of the Eigenmietwert (imputed rental value) with 57.7 percent of the vote. The decision marks a fundamental pivot in how the Swiss Confederation views homeownership, shifting it from a taxable benefit to a simpler form of private asset. The reform is expected to take effect no earlier than the 2028 tax year, giving homeowners and financial planners a critical window to adjust their strategies.
For the average homeowner, the change is not a simple tax cut; it is a systemic trade-off. While the “fictitious income” will vanish from tax returns, so too will many of the deductions that previously softened the blow. This shift creates a new set of winners and losers depending on a household’s debt level and investment habits.
The New Calculus: Who Wins and Who Loses?
The primary benefit of the reform is the immediate removal of the imputed rental value from taxable income. This is a significant victory for “empty nesters” and retirees—those who have spent decades paying down their mortgages and now have little to no debt interest to deduct. Under the ancient system, these individuals were often penalized, paying taxes on a theoretical rental income with almost no offsetting deductions.
However, the transition is more precarious for those with high leverage. The abolition of the Eigenmietwert triggers a corresponding loss of the general debt interest deduction for owner-occupied properties. For households with substantial mortgages, the loss of this tax shield could potentially outweigh the benefit of removing the imputed income.
Markus Stoll, a tax specialist at VZ Vermögenszentrum, notes that the uncertainty is palpable. “The disappearance of the imputed rental value raises several questions—many homeowners are unsettled,” Stoll says. He points out that while some see a direct tax saving, others may face a higher effective tax burden, particularly those currently investing heavily in renovations.
To mitigate the shock for new buyers, the reform includes a temporary “first-time buyer” rule. This provision allows for a degressive debt interest deduction over a ten-year period, easing the transition for those entering the market with high loan-to-value ratios.
Comparing the Old and New Tax Regimes
| Feature | Previous System | New System (Post-2028) |
|---|---|---|
| Imputed Rental Value | Taxed as fictitious income | Abolished |
| Debt Interest | Generally deductible | Generally non-deductible* |
| Maintenance Costs | Deductible from income | Generally non-deductible |
| Energy Upgrades | Tax-deductible | Varies by Canton (ending by 2050) |
*Except for the temporary first-time buyer arrangement.
The Mortgage Dilemma: Liquidity vs. Equity
The most pressing question for homeowners now is whether to accelerate the repayment of their mortgages. Without the tax incentive to carry debt, the financial logic of maintaining a high mortgage—a hallmark of the Swiss system—has evaporated.
While the instinct may be to amortize debt to reduce interest payments, financial experts warn against a rush to equity. Once capital is locked into the bricks and mortar of a home, it becomes illiquid. For many, maintaining a level of liquidity is more valuable than a debt-free home, especially when considering the unpredictability of later-life expenses.
Stoll suggests that households with tight reserves should prioritize a financial cushion over a lower mortgage. “Higher liquidity can be more valuable than a lower mortgage,” he explains, citing the need for funds to cover unforeseen costs, such as high long-term care expenses.
The strategy now depends on the opportunity cost of the capital. If a homeowner can earn a higher return by investing their savings in the market than they pay in mortgage interest, the debt remains a viable tool—even without the tax deduction.
The Green Transition and Institutional Ripples
Beyond the individual household, the reform introduces a potential conflict with Switzerland’s climate goals. For years, tax deductions for energy-saving measures have driven the renovation of older building stocks. While some cantons may maintain these deductions for a time, the federal trend is toward a total phase-out.
The timeline is stark: by 2050, these incentives are expected to vanish at the cantonal level as well. This removes a powerful fiscal lever for sustainable renovation, potentially slowing the pace of the “green transition” in the residential sector.
The impact similarly extends to the institutional level. Swiss pension funds are among the largest real estate investors in the country, holding vast portfolios of both commercial and residential assets. While the reform primarily targets owner-occupied homes, the resulting shifts in market behavior—such as changes in how properties are valued or how demand for residential real estate evolves—will force institutional investors to recalibrate their risk and return models.
the reform reaffirms that while a home remains a cornerstone of retirement planning—reducing living costs in old age and providing a liquidable asset—it is no longer a tax-optimization vehicle. For younger generations and lower-income earners, however, the tax shift does little to solve the underlying crisis of affordability in a market where entry barriers remain prohibitively high.
Disclaimer: This article is for informational purposes only and does not constitute professional tax or financial advice. Tax laws vary by canton and individual circumstances.
The next major milestone will be the legislative detailing of the transition period, as the government defines the exact parameters of the first-time buyer deductions and the coordination between federal and cantonal tax authorities ahead of the 2028 implementation.
Do you think this reform makes homeownership more attractive or more risky? Share your thoughts in the comments or share this analysis with a fellow homeowner.
