Variable-rate mortgages at a glance
A variable-rate mortgage is a flexible alternative to fixed-rate and Saron mortgages. What are the interest rates, and who might find a variable-rate mortgage worthwhile? Comparis provides an overview.

14.08.2025

iStock/FG Trade
1. What is a variable-rate mortgage?
A variable-rate mortgage is a loan with no fixed term and no fixed interest rate. The interest rate of a variable-rate mortgage is continuously adjusted to the current market conditions. As a result, mortgage rates can rise or fall periodically.
Variable-rate mortgages compared to other mortgage models
A variable-rate mortgage differs from other mortgage models in the following ways:
Fixed-rate mortgages: with a fixed-rate mortgage, the term and interest rate are fixed from the start. The mortgage rates remain the same over the entire term.
Saron mortgages: Saron and variable-rate mortgages both have variable interest rates. With a Saron mortgage, the interest rate is directly linked to the money market. Interest rate adjustments are therefore transparent. A variable-rate mortgage is not tied to a reference interest rate – instead, the mortgage lender determines the mortgage rate.
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2. What are the interest rates on a variable-rate mortgage?
Interest rates for variable-rate mortgages can fluctuate sharply on a regular basis. They also vary from lender to lender. You can find the latest developments in the mortgage market here.
Good to know: interest rates for variable-rate mortgages
Interest rates for variable-rate mortgages are significantly more expensive than for fixed-rate and Saron mortgages. You therefore pay a premium for the additional flexibility of a variable-rate mortgage in the form of a higher interest rate.
3. Advantages of a variable-rate mortgage
A variable-rate mortgage offers various advantages over long-term fixed-rate mortgages or Saron mortgages:
Maximum flexibility: you can terminate the mortgage at any time or switch to another model. The notice period is usually only three to six months.
No minimum amount: there is usually no minimum amount for a variable-rate mortgage, so you can also take it out for smaller mortgage loans.
Low-interest phase: if market interest rates fall, your mortgage interest rates will also fall.
Repayments possible at any time: you can make repayments flexibly, often without a minimum amount. As a rule, there are no penalties for early amortization, unlike with fixed-rate mortgages. The exact conditions may vary slightly depending on the lender.
4. Disadvantages of a variable-rate mortgage
Besides the advantages, variable-rate mortgages also have disadvantages compared to other mortgage models:
Higher interest rates: variable-rate mortgages are generally more expensive than fixed-rate or Saron mortgages – especially in a low-interest-rate environment.
Rising interest rates: a rise in the market interest rate will lead directly to a higher mortgage rate. As a result, the mortgage will be more expensive.
Non-transparent interest rate: the interest rate is set by the financial institution and is not tied to a public reference rate. It is not always clear to borrowers how and when the interest rate is adjusted.
No planning security: since the interest rate can fall or rise, you cannot plan the monthly costs exactly.
5. Is a variable-rate mortgage suitable for me?
A variable-rate mortgage is suitable for you if you want maximum flexibility. For example, because you are planning to sell a property or your financing situation will soon change.
A variable-rate mortgage may also make sense for you as a temporary solution. For example, until you switch to a different mortgage model or when financing a smaller amount.
However, a variable-rate mortgage is less suitable for people who need to be able to plan their ongoing costs exactly. If you can’t afford rising interest rates, a different mortgage model is better suited.
6. How can I terminate my variable-rate mortgage?
You can terminate a variable-rate mortgage at any time, provided you observe the contractually agreed notice period. The notice period is usually three to six months. Submitting a written notice of termination to the mortgage lender is usually sufficient. You can find the exact requirements and the exact deadline in your mortgage agreement.
This article was first published on 14.08.2025