Saron mortgage

Flexible and inexpensive

With the PostFinance Saron mortgage, you will benefit from a steady or falling interest rate environment. You take out a mortgage for a fixed term of three years, but you can still remain flexible. The interest is adjusted every three months during the mortgage term.

Saron mortgage: interest adjustment every three months

  • Term: three years, term concludes at the end of each quarter

  • Interest rate based on the Compounded SARON®

  • Option to switch to a fixed-rate mortgage at the end of each quarter

  • Direct or indirect amortization via retirement savings account 3a, PostFinance retirement funds or life insurance policies

  • Preconditions

    • Natural persons with a permanent domicile in Switzerland
    • Swiss citizens and foreign nationals with B or C residency permits


    Maximum amount
    • Single-family homes (owner-occupied): max. 80% of the total property value
    • Owner-occupied apartments: max. 80% of the total property value
    • Holiday homes: max. 75% of the total property value
    Reference interest rate
    Compounded SARON®
    Interest due dates
    Quarterly (31.03 / 30.06 / 30.09 / 31.12)
    Payment method
    Payments due are debited to the private account via Direct Debit
  • Current interest rate for Saron mortgage

    Interest rate for new business valid as of 23.02.2024

    3 years
    Interest period
    3 months
    Base interest rate + guide margin
    • For the entire duration, the interest rate is composed of the relevant base interest rate plus the guide margin.
    • The base interest rate is always at least 0.00%.
    • For each interest period, the interest rate is fixed five banking days before the end of the interest period.
    • Throughout the entire term, it is possible to change to a PostFinance fixed-rate mortgage at the end of each quarter.
    • The interest rates are standard rates for the best creditworthiness of owner-occupied home ownership. Data is given for information purposes only and is non-binding.


    The framework term is three years.

    The interest rate is based on the Compounded SARON®, is calculated 5 days before the interest date and is valid for the relevant quarter. This means the interest rate is only known at the end of the interest period.

    The interest rate can vary significantly depending on the market situation. This benefit is passed on directly and swiftly in the event of rate cuts. If, however, the Compounded SARON® is negative, this is replaced by 0.00%.

    There is also the option of switching to a PostFinance fixed-rate mortgage at the end of the quarter.

    Terms for interest rates

    All interest rates apply to first-class residential real estate and borrowers (best creditworthiness). Individual customer interest rates are set according to risk. This means the loan-to-value and financial burden ratios for individual customers have an impact on the amount of interest payable.

  • The interest rate of the Saron mortgage is based on the Compounded SARON® rate in addition to the agreed contractual margin.

    The SARON® is the new Swiss reference interest rate. This is calculated and published on a daily basis by SIX based on the money market transactions made that day. The interest rate of the Saron mortgage is based on the Compounded SARON®. This is determined five calendar days before the end of the quarter based on the individual SARON® daily interest rates over the past three months. As this is only calculated five days before the interest date, the interest rate is still unknown at the beginning of the respective quarter. The contractually agreed individual margin (surcharge on the reference interest rate) is fixed for the full term.

  • Fees

    CHF 100
    Extension fee
    CHF 250
    Credit modification fee (such as change of borrower, change of collateral, change of mortgage to another provider upon expiry, extraordinary amortization or suspension/change of amortization) , Switch from a LIBOR mortgage/Saron mortgage to a fixed-rate mortgage, increases
    CHF 500
    In the event of a premature withdrawal from the credit agreement 

    Third-party fees (e.g. land register fees or notary costs) will be passed on to the borrower.

    Discount on Smart and SmartPlus banking packages

    With a mortgage, you receive a discount of CHF 5 on your banking package.

  • PostFinance works with the following cooperation partners to offer financing services: Valiant Bank AG, Münchener Hypothekenbank eG, Munich, and CredEx AG, Zurich.

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