The 3× rule in detail
Swiss tenancy law does not prescribe the 3× rule; it is the yardstick most landlords and agencies use. They compare your gross monthly income with the monthly rent including Nebenkosten, and like to see roughly three times as much.
What Zurich rents mean for your income
Median gross rents (with Nebenkosten) of flats let by private landlords in the city of Zurich, existing leases, 1 April 2026 (Statistik Stadt Zürich):
| Flat | Median gross rent | Income at 3× (gross, per month) |
|---|---|---|
| 2 rooms | CHF 1,850 | about CHF 5,550 |
| 3 rooms | CHF 2,170 | about CHF 6,510 |
| 4 rooms | CHF 2,680 | about CHF 8,040 |
Two things to keep in mind. First, these are rents of existing leases, including people who moved in long ago; a flat advertised today usually costs more. For private 3-room flats with a lease of under two years the median net rent was CHF 2,250 (Statistik Stadt Zürich, 2026), and the federal statistics put 3-room flats let in the last two years at CHF 2,125 net on average (BFS, 2024). Second, non-profit flats (city, cooperatives, foundations) are much cheaper: CHF 1,237 gross for 3 rooms, but they are let by their own rules.
Exceptions and flexibility
- A strong dossier: some landlords accept a little less if your references, Betreibungsauszug and job are solid
- Co-signer (Solidarbürge): if you are under the threshold, a parent or partner can co-sign · the landlord then looks at both incomes
- Couples: married couples usually have both incomes counted · unmarried partners are often treated the same if both sign the lease
- Self-employed: expect to show your last tax returns and proof that you pay social insurance (AHV)
What to do if you're below the threshold
- Apply with a co-signer. The most common workaround.
- Show savings. A bank statement with substantial savings can offset a gap for some landlords.
- Look in the Kreise with lower rents. For private 3-room flats the median net rent is lowest in Kreis 12 (CHF 1,576), Kreis 11 (CHF 1,801), Kreis 10 (CHF 1,804) and Kreis 3 (CHF 1,883), against CHF 2,855 in Kreis 1 (Statistik Stadt Zürich, 2026).
- Consider a WG (shared flat). Splitting a larger flat with flatmates lowers your share of the rent.
How aptari helps
aptari builds the income rule into your Match Score: the closer your income is to three times the rent, the higher that part of your score. Before you apply, you see whether a listing is a comfortable fit or a stretch, and why. You search one open feed (Homegate, ImmoScout24, Flatfox and cooperative websites), apply with one click on listings from aptari partner agencies using your Tenant Passport (on other Swiss portals and at cooperatives, Apply with Aptari prepares your message wherever the button shows, and you send it), and on Ultra the Apply Agent applies for you to partner listings you fit. One-click apply and the Apply Agent start as soon as partner agencies list on aptari; none have yet.
See the Zurich city page for the official rents per Kreis.