Mortgage amortization in Switzerland: complete guide

Amortization is a central element of your mortgage in Switzerland. Understanding how it works allows you to optimize your finances, reduce costs, and prepare serenely for retirement. This guide covers the essential aspects: types of amortization, legal obligations, and optimization strategies.

What is mortgage amortization?

Mortgage amortization refers to the progressive repayment of the principal borrowed from your bank or insurer. In Switzerland, unlike many other countries, it is not common to repay the entire mortgage. The system is based on two levels of financing -- the 1st lien and the 2nd lien -- with distinct amortization rules for each.

The Swiss regulatory framework, defined by FINMA (the Swiss Financial Market Supervisory Authority) and the Swiss Bankers Association (SBA), mandates the obligatory amortization of the 2nd lien. This obligation aims to bring the loan-to-value (LTV) ratio down to a maximum of two-thirds (67%) of the property value within 15 years of the mortgage being granted.

1st lien and 2nd lien: the two levels of a Swiss mortgage

The mortgage is structured in two tranches, each with its own conditions:

• 1st lien (up to 67% of the property value): This tranche benefits from lower rates as the risk for the bank is lower. Amortization of the 1st lien is generally not mandatory.
• 2nd lien (from 67% to 80% of the property value): This tranche carries higher risk. Amortization is mandatory: the 2nd lien must be repaid within a maximum of 15 years or before retirement age (65), whichever comes first.

For example, for a property valued at CHF 1,000,000, the 1st lien amounts to CHF 670,000 and the 2nd lien to CHF 130,000 (assuming 80% LTV). It is these CHF 130,000 that you must mandatorily amortize.

Direct vs indirect amortization

The choice between direct and indirect amortization is one of the most important financial decisions for a homeowner in Switzerland. Both methods achieve the same goal -- reducing the debt -- but in very different ways.

Direct amortization

You regularly repay a portion of the mortgage principal. The debt decreases progressively, as do the interest payments and the corresponding tax deduction. This is the simplest and most intuitive method.

Indirect amortization

Instead of repaying the mortgage directly, you pay the amount into a tied pension product (pillar 3a). The mortgage debt remains constant, and the pillar 3a capital is used to repay the mortgage at maturity or at the time of withdrawal. The tax advantages are twofold: mortgage interest remains fully deductible and pillar 3a contributions are also deductible from taxable income.

In 2026, the annual pillar 3a cap is CHF 7,258 for employees affiliated with a 2nd pillar (occupational pension). For self-employed individuals without a 2nd pillar, the cap is 20% of net income (max. CHF 36,288).

For a detailed analysis with comparison tables and concrete examples, see our complete guide on direct vs indirect amortization.

2nd lien amortization in detail

The 2nd lien is the portion of the mortgage between 67% and 80% of the property value. Its amortization is subject to strict rules:

• Full repayment within 15 years maximum after the loan is granted
• Repayment before retirement age (65 for both men and women since 2025)
• Whichever deadline comes first applies
• Payments must be regular (typically quarterly or annual)

An amortization schedule is established at the time of signing the mortgage contract. It is essential to adhere to it to avoid complications with the lending institution. See our dedicated page to understand the calculation and schedule for 2nd lien amortization.

The 15-year rule

The 15-year rule is simple in principle: the 2nd lien must be fully repaid within 15 years of concluding the mortgage contract. In practice, this means that if you take out a mortgage at age 40, you have 15 years (until age 55) to repay the 2nd lien.

However, if you are 55 at the time of purchase, the deadline is reduced to 10 years (to reach retirement age of 65), as the retirement rule takes priority.

Amortization and retirement

Approaching retirement is a critical moment for managing your mortgage. At retirement, your income decreases significantly (typically 60-70% of your last salary when combining AVS/AHV and LPP/BVG), which can affect your financial capacity according to bank criteria.

Several strategies help you prepare:

• Voluntary early amortization: Reduce the debt before retirement to lighten monthly charges
• Indirect amortization via pillar 3a: Accumulate capital that will be paid out at retirement to reduce the mortgage
• Partial withdrawal of 2nd pillar (LPP/BVG): Use part of the occupational pension capital to repay the mortgage (be aware of the impact on your pension annuity)
• Comprehensive planning: Combine retirement income, assets, and debt reduction to maintain an acceptable expense-to-income ratio

It is recommended to start planning your mortgage situation at least 10 years before retirement. See our detailed guide on mortgage and retirement for an in-depth analysis.

Tax optimization of amortization

In Switzerland, mortgage debt and borrowing interest are deductible from taxable income and wealth. This means that fully repaying the mortgage is not always the best financial strategy.

Indirect amortization via pillar 3a allows you to combine two tax advantages: maintaining the deduction of mortgage interest and deducting pillar 3a contributions. Depending on the canton of residence and marginal tax rate, the tax savings can amount to several thousand francs per year.

However, this strategy must be evaluated on a case-by-case basis. The mortgage rate, marginal tax rate, remaining duration, and overall financial situation are all factors to consider. A mortgage broker can help you determine the optimal strategy.

Common mistakes to avoid

• Neglecting the schedule: Late amortization payments can lead to penalties or termination of the mortgage
• Over-amortizing the 1st lien: Without a tax strategy, excessive amortization can be counterproductive
• Ignoring the indirect option: Indirect amortization via pillar 3a is often more advantageous but less well-known
• Not anticipating retirement: Waiting until the last moment to adapt your strategy can limit your options
• Forgetting ancillary costs: Amortization is only part of your expenses; maintenance (1% per year) and interest must also be budgeted

Explore our detailed guides

To dive deeper into each aspect of mortgage amortization, see our specialized guides:

• Direct vs indirect amortization -- Detailed comparison, tables, worked examples over 15 years
• 2nd lien amortization -- Amortization rules, schedule, calculation, and concrete examples