Equity, Loan-to-Value, and Amortization: Swiss Mortgage Financing Explained

Swiss mortgage financing follows three clearly defined basic rules. Anyone who understands equity, loan-to-value, and amortization knows the entire foundation — and can speak with the bank and the broker on equal footing.

In Switzerland, banks finance a maximum of 80 percent of a property's value through a mortgage. Buyers must contribute the remaining 20 percent as equity. Of that, at most half may come from the pension fund or Pillar 3a — a minimum of 10 percent in hard equity outside of retirement savings is mandatory.

Loan-to-value is the ratio between the mortgage and the property's value. With a purchase price of CHF 1,000,000 and a mortgage of CHF 800,000, the loan-to-value is 80 percent. Within that 80 percent, banks distinguish between a first mortgage (up to 65 percent loan-to-value) and a second mortgage (from 65 to 80 percent), which must be amortized without exception.

The second mortgage (15 percent of the property's value) must be paid down to 65 percent loan-to-value within 15 years or by retirement — whichever comes first. Two paths are available for this: direct amortization (annual repayment to the bank) or indirect amortization (payments into a Pillar 3a account, which later pays off the second mortgage).

Direct amortization immediately reduces the debt and interest burden. Until 2028, it is less tax-attractive than the indirect variant, because it reduces debt interest deductions. With the abolition of imputed rental value from 2029, this logic shifts — direct amortization becomes more attractive again in many cases. Indirect amortization via Pillar 3a combines the debt interest deduction with tax-privileged retirement savings, and is often the most economical path under the current tax regime.

Anyone who contributes more equity lowers the loan-to-value and thereby reduces the interest and amortization obligation. Anyone who instead keeps equity available for other investments accepts higher housing costs. This trade-off is individual — and belongs in sound financial planning before every property purchase.

• Calculating Affordability
• Abolition of Imputed Rental Value 2029
• Swiss Mortgage Rates 2026

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