key4 – Attractive mortgages with best interest rates

We finance your hopes and dreams

Taking out a mortgage should not be complicated. Arrange one online with us and get personal advice.

"The excellent advice combined with low interest rates makes key4 a very attractive partner."
Bernhard Tobler, Winterthur
"The excellent advice combined with low interest rates makes key4 a very attractive partner."
Bernhard Tobler, Winterthur

Our indicative interest rates*

These interest rates are for illustrative purposes only and are updated regularly (current status as at 31.03.2023). They do not constitute a binding financing offer.

The interest rates shown were determined by key4 on the basis of the following financing parameters: canton: Zurich, loan amount: CHF 500,000, affordability: 24%, loan-to-value ratio: 50%, mortgage payout date: 01.05.2023.

Your mortgage with key4

Combine offers from various Swiss financing providers to create your own personal overall financing solution.

Attractive interest rates and terms of up to 15 years
Free, one-stop advice and processing
Receive non-binding offers immediately online

What is key4?

What is key4?

What our clients say

I had a great client advisor who was very knowledgeable. Arranging the financing was straightforward and easy. I'd be happy to recommend key4.

Marco Gujan


Our key4 advisor put our minds at ease, answering all our initial concerns (is such a low-cost mortgage even possible?) with personal, expert and customer-oriented advice. Not only the sensationally low mortgage interest rates convinced us, but also the “strong bank” behind them. We've already recommended key4 to all our neighbors!

René und Franziska Kasper


Mr. Luca Figlioli's expert, entertaining and goal-oriented advice was excellent. We were particularly impressed by how well Mr. Figlioli explained the ins-and-outs of redeeming a mortgage held with another bank. The excellent advice combined with low interest rates make key4 a very attractive partner.

Bernhard Tobler


Thanks to Mr. Figlioli's excellent advice and the offers of various banks, the decision to go with key4 rather than our house bank was obvious.

Leonardo Pio
Elisabeth Blanchet


Ready for the best offer?

  • Specify financing and property data

  • Receive a non-binding offer

  • Get free advice – and take out your mortgage

Ready for the best offer?

There for you in person

Our advisors look forward to talking to you and answering your questions. Give us a call or simply arrange an appointment for a callback.

Financing an investment property


Are you looking for a mortgage for your investment property?
Or would you like to invest in a Swiss mortgage?

You’ve come to the right place:
we bring mortgage holders and investors together.

How will interest rates evolve?

Receive our interest rate forecast regularly and free of charge by e-mail and find out more about future interest rate trends.

Subscribe to interest rate forecast

UBS key4 banking

Discover UBS key4 banking: One app. Many options.
Open an account now via smartphone and get started.

Ready for the best offer?

We use cookies to make sure you get the best experience on our website. For further information please consult the Privacy Statement. You are free to change your cookies’ settings in the privacy settings. Go to privacy settings