Switzerland Mortgage Guide 2026: Two-Tier Mortgages and Affordability

Lending in Switzerland requires passing strict capital and affordability tests regulated by FINMA and the Swiss Bankers Association (SBA).

The 20% Down Payment (Eigenmittel)

You must provide a minimum 20% down payment. Crucially, at least 10% must be "hard cash" (savings, securities, Pillar 3a retirement funds). The remaining 10% can be withdrawn or pledged from your Pillar 2 occupational pension (Pensionskasse).

The 5% Affordability Stress Test (Tragbarkeit)

To prevent defaults if rates spike, Swiss banks stress-test your income at a hypothetical 5% interest rate, regardless of how low actual rates are.

The rule: Total housing costs—comprising 5% interest on the entire loan, 1% of the property value for maintenance/utilities, and the mandatory amortization of the second mortgage—must not exceed 33% of your gross income.

Use the affordability calculator applying the 5% stress rate to see if your income qualifies.

The Two-Tier Mortgage System

Swiss mortgages are structurally divided into two parts:

1st Mortgage (1. Hypothek): Covers up to 66% of the property's value. You never have to pay off the principal of this tranche. You only pay the interest forever.

2nd Mortgage (2. Hypothek): Covers the gap between 66% and 80% (the maximum LTV). You must amortize (pay off) this tranche within 15 years or before reaching retirement age (65), whichever comes first.

Indirect Amortization: Instead of paying off the 2nd mortgage directly, you can pay the amortization amount into a tax-advantaged Pillar 3a retirement account pledged to the bank. At retirement, the 3a funds pay off the 2nd mortgage. This maximizes your tax deductions.

Swiss Mortgage Types

Fixed-Rate (Festhypothek): The rate is locked for 2 to 15 years. Breaking a fixed rate early triggers a massive penalty fee (often tens of thousands of francs).

SARON Mortgage (Geldmarkthypothek): Replaced the old LIBOR mortgage. The rate fluctuates daily based on the Swiss Average Rate Overnight (SARON) plus a fixed bank margin (usually 0.70% to 1.00%). This is highly transparent and often cheaper over the long run, but requires the borrower to absorb rate volatility.

Following the SNB's interest rate maneuvers, average 2026 rates are:

SARON Mortgage: 1.60% to 2.00%

*Rates are illustrative averages as of September 2026.*

Closing costs in Switzerland are relatively low compared to neighboring countries, usually totaling 2% to 4% of the purchase price.

Property Transfer Tax (Handänderungssteuer): Varies drastically by canton. Ranging from 0% (e.g., Zurich abolishes it for primary residences) up to 3.3% in others (e.g., Neuchâtel).

Eigenmietwert (Imputed Rental Value): A unique Swiss tax. Homeowners must add an estimated rental value of their own home to their taxable income. To offset this tax burden, homeowners deduct their mortgage interest payments—which is why the Swiss rarely pay off their 1st mortgage.

Use the budget calculator to estimate your canton-specific costs.

Due to the Eigenmietwert tax (adding imaginary rental income to your real income), maintaining a high mortgage balance allows you to deduct the interest payments, optimizing your overall tax burden. Furthermore, investing surplus cash often yields a higher return than the low Swiss mortgage interest rates.

Yes. Splitting a Swiss mortgage into multiple tranches is standard financial practice. For example, on a CHF 1,000,000 loan, a borrower might place CHF 500,000 into a 10-year fixed-rate tranche for budgetary predictability and CHF 500,000 into a money-market SARON tranche to capture lower short-term overnight interest rates. However, borrowers should ensure expiration dates across tranches are harmonized; staggered maturities can prevent you from switching lenders if one tranche matures while another remains locked under severe break fees.