Casatax 2026 in Geneva: Your Guide to Homeownership Savings

Purchasing a primary residence in Geneva remains a significant financial milestone, supported by specific cantonal measures. As of 2026, the fiscal landscape is evolving, defined by the annual indexation of the Casatax thresholds and the long-anticipated transition toward a new system for the taxation of owner-occupied housing. At OAKSWELL, we guide our clients through these changes to ensure their real estate strategy remains optimized.

Casatax 2026: Updated Thresholds and Benefits

The Casatax scheme remains a pillar of Geneva’s homeownership policy, designed to reduce the financial burden of transfer duties for those buying their main residence. Effective March 1, 2026, the parameters have been adjusted to reflect market trends, with an indexation of approximately 1.4% based on the Geneva construction price index [5].

• Maximum Property Value: CHF 1,394,928 (up from CHF 1,374,396 in 2025) [5].
• Transfer Duty Reduction: Up to CHF 20,924 (up from CHF 20,616 in 2025) [5].
• Mortgage Deed Fees: A 50% reduction on registration fees for mortgage certificates remains in effect [5].

These adjustments ensure the scheme remains relevant despite the rising cost of property in the canton [5].

The Abolition of Imputed Rental Value

Following the national vote on September 28, 2025, Switzerland is set to abandon the taxation of imputed rental value. It is critical for current and future owners to understand the timeline: the new system will not take effect until January 1, 2029 [6].

Until this date, the existing rules prevail. Owners must continue to declare the imputed rental value as income, but they retain the right to deduct mortgage interest, maintenance costs, and energy-saving investments from their taxable income [6].

Impact on Your Real Estate Strategy

The transition to the 2029 model will fundamentally alter the tax efficiency of homeownership [6, 8].

• For homeowners with little to no debt: The abolition of the imputed rental value will generally be beneficial, as they will no longer be taxed on "fictional" income [8, 10].
• For highly leveraged owners: The loss of mortgage interest deductions will require careful financial planning, as these will be limited to first-time buyers and restricted in duration [8].

We recommend that homeowners use this transitional period to plan necessary maintenance or energy-efficiency renovations, as these remain tax-deductible under the current regime until the end of the 2028 tax year [6, 8].

Key Takeaways

• Casatax 2026: The eligibility ceiling is now CHF 1,394,928, offering immediate relief on registration fees [5].
• Rental Value Reform: The current system (tax on rental value, with deductions) applies until December 31, 2028 [6].
• Planning: Consult with a fiscal expert to evaluate your long-term tax burden, especially if you hold a significant mortgage [8, 10].

FAQ

Is the Casatax ceiling adjusted every year?

Yes, the threshold is indexed annually by the Council of State based on the Geneva construction price index to keep pace with market values [5].

Can I still deduct maintenance costs in 2026?

Yes. The current rules remain fully applicable until the reform enters into force on January 1, 2029 [6].

How does the 2029 reform affect new buyers?

The new legislation will significantly limit the deduction of mortgage interest, though specific transitional provisions or limited deductions for first-time buyers may apply [8].

Sources

• [5] Rosset, Casatax 2026: nouveaux montants dès le 1er mars 2026.
• [6] République et canton de Genève, L’abolition de l’imposition de la valeur locative entrera en vigueur le 1er janvier 2029, 7 avril 2026.
• [8] BDO, Conséquences fiscales pour les propriétaires de logements en Suisse, 2025.
• [10] Swiss Tax Horizon, Réformes Fiscales Genève 2026, 14 mars 2026.