Rental deposit in Switzerland: blocked account or guarantee?

Signing a Swiss lease means producing a deposit — usually the single biggest cash demand of the whole move. You have two ways to cover it: park the money in a blocked bank account, or pay an insurer a yearly premium to guarantee it for you.

One of these is cheaper, the other keeps your cash free. This guide gives you the legal frame, an honest comparison, and the cases where each option actually makes sense.

The rules first

Swiss tenancy law draws clear lines around residential deposits (Art. 257e of the Code of Obligations):

• The cap is three months’ rent. A landlord cannot require more as security for a residential lease.
• The money stays yours. A cash deposit must be placed in a bank account in the tenant’s name — a dedicated Mietkautionskonto. The landlord never holds your deposit personally.
• Release needs both sides. At the end of the tenancy the bank releases the deposit with the landlord’s consent, after any justified claims (damage, unpaid charges) are settled.

Anything that deviates from this pattern — “transfer the deposit to my private account”, “pay before the contract is signed”, payment to an account abroad — is not how Switzerland works and belongs in the scam guide.

Your two options, honestly compared

The structural difference: with a blocked account your money sits locked but remains your asset and comes back at the end. With a rental guarantee you keep the cash, but the premium is a real cost — paid every year, never refunded, and if the landlord ever draws on the guarantee, the insurer reclaims that amount from you. A guarantee is deferred liquidity, not insurance against owing the money.

How the blocked account works, step by step

1. After the lease is signed, the landlord or agency names the deposit amount (one to three months’ rent).
2. Open a Mietkautionskonto at a Swiss bank — most banks open one quickly once you have a lease; ask for a “rental deposit account / Mietkautionskonto”. It is opened in your name, tied to the lease.
3. Transfer the deposit and hand the bank’s confirmation to the landlord. That confirmation is what they actually need — not your cash in their hands.
4. At move-out, after the handover protocol is settled, both parties sign the release and the bank returns the money (plus whatever minimal interest accrued) to you.

Total cost over the whole tenancy: essentially zero. That is why the blocked account is the default recommendation whenever the cash is available.

When a guarantee genuinely makes sense

Move-in month stacks costs brutally: first rent, the move itself, furniture — and on top of it, up to three months’ rent frozen in a deposit. If freezing that cash means real hardship, paying a yearly premium to keep it liquid is a legitimate trade:

• You just relocated and the buffer you have must cover furniture and surprises, not sit in a blocked account.
• Bridging a double burden — overlapping rents during a move, or waiting for the old deposit to be released.
• Application tactics: some providers issue a provisional certificate before you even sign a lease (Firstcaution offers this) — attaching it to an application signals the deposit question is already solved.

Run the numbers before committing: premiums for rental guarantees commonly land in the range of roughly 4–6% of the deposit per year (exact pricing sits behind each provider’s calculator — goCaution starts at CHF 94.50 per year including stamp duty, Firstcaution from CHF 8 per month). Over a multi-year tenancy that adds up to a meaningful share of the deposit itself — money a blocked account would have simply given back.

A sensible hybrid: start with a guarantee when cash is tight, then switch to a blocked account after a year or two of Swiss salaries, and stop paying premiums. Nothing locks you into the guarantee forever.

Decision in one paragraph

Cash available and no competing emergencies → blocked account, full stop — it is the cheapest option and reads as financially solid in your dossier. Cash genuinely tight, or you need a provisional certificate to strengthen applications → guarantee now, blocked account later. Whatever you choose, decide before you apply: “deposit plan: ready” is one of the boxes the dossier check scores, because agencies notice applicants who can sign without delay.