What may and may not be charged
Chargeable: heating, hot water, caretaker, lift, general electricity, water/sewage – if the rental contract lists them. Not chargeable: the landlord's repairs, renovations or building insurance. Anything not listed in the contract belongs to the landlord.
Advances and the yearly settlement
With advance payments (akonto), you get an annual settlement: real costs minus what you paid. Check the maths and the positions – requesting the detailed receipts is your right. Refunds and back-payments of several hundred francs are common.
Budget rent as one block
Plan net rent + ancillary advances + electricity + Serafe as one 'housing' block – that's your true monthly housing cost.
Track these costs in your own budget: create your free Swiss budget in BudgetHub – in English, with Swiss categories built in.
What Nebenkosten actually include
Typically heating and hot water, water and wastewater, waste disposal, caretaker services, shared electricity, lift maintenance and sometimes cable or building insurance. What is included must be listed in the lease – anything not listed cannot be charged.
The monthly figure on your lease is an advance payment (Akonto), not a fixed price. The annual settlement reconciles it against actual costs, producing either a rebate or an additional payment.
Some leases use a flat rate (Pauschale) instead, which cannot be reconciled – you pay the same regardless of consumption. This is more predictable but means efficiency savings do not reach you.
Why the advance is often too low
A low advance makes the advertised gross rent look attractive, and letting agencies know it. An old building with poor insulation and an under-set advance produces a large annual settlement, which arrives long after the decision to move in.
Two questions before signing prevent this: what were the actual Nebenkosten in the last two years, and is the advance based on them? Landlords can answer both, and reluctance to do so is itself informative.
Compare flats on gross rent including a realistic Nebenkosten figure, not on net rent. A CHF 100 lower net rent with a CHF 150 higher heating cost is a worse deal that looks better in a listing.
Checking a settlement you think is wrong
Tenants have a right to inspect the underlying invoices at the landlord's or administrator's office. This is a routine request, not an escalation, and it is the only way to verify a settlement at all.
Common errors: costs charged that are not listed in the lease, an allocation key that does not match the contract, and maintenance charged as an operating cost when it is the owner's responsibility.
Objections have deadlines. Cantonal tenant associations advise on this for a small membership fee and handle disputed settlements routinely – for a four-figure additional payment, the membership pays for itself immediately.