The reference interest rate stays at 1.25%
The benchmark used for many rents is unchanged. Landlords should start by reviewing their leases and previous adjustments.
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The September update
On 1 September 2026, the Federal Office for Housing confirmed that the mortgage reference interest rate remains at 1.25%. It is relevant to adjustments of many existing leases. It differs from the SNB policy rate and your own mortgage rate.
Review each lease
An unchanged rate alone does not establish grounds for a rent increase or reduction. Gather the lease, earlier adjustment notices and details of service charges before having an adjustment assessed.
Put rental income in context
For a rented property valuation, provide actual rent receipts, occupancy and maintenance costs. These documents offer a more useful basis for discussing the building’s operation than a single interest rate.
Understand what gives your property its value.
Market figures provide context. The visit documents your property. The analysis brings the elements together to explain the assessed value.
Current value is based on documented uses, condition and rights. An extension or conversion project is presented separately with conditions to check. This distinction gives you a clear basis for decisions.
Understand our method