Job relocation, separation, opportunity, a change in circumstances: reselling shortly after buying is nothing unusual — and legally, nothing prevents it: Swiss law sets no minimum holding period. But in Geneva, three counters run against the early reseller, and two emergency exits exist. Here they are, with verified figures.
Counter 1: IBGI, up to half the gain
The Geneva tax on real estate profits and gains (IBGI) follows a strictly degressive scale based on the holding period: 50% of the gain for a resale before two years, 40% between two and four years, 30% between four and six years, then 20%, 15%, 10% from ten years — and a residual rate of 2% beyond twenty-five years: full exemption no longer exists. The strategic consequence is immediate: a few months before a threshold, timing is worth money — waiting for the holding period to move from two to four years brings the rate down from 50% to 40%. Our IBGI calculator works out your exact case, deductible expenses included, and the net seller proceeds simulator translates it all into francs actually received.
Counter 2: the fixed-rate mortgage
Exiting a fixed-rate loan before its term triggers an early repayment penalty — calculated on the bank’s loss of earnings until maturity, it can reach tens of thousands of francs on a recent contract. Three routes avoid or reduce it: transferring the mortgage to your new property if you are buying again; having it taken over by the buyer, with the bank’s agreement; or negotiating the exit — each institution has its own margin, as at renewal. The mortgage note (cédule hypothécaire), however, can be transferred: having the buyer take it over spares them real costs — a negotiating point worth remembering.
Counter 3: unamortised purchase costs — and the Casatax clawback
The costs paid on purchase — registration fees, disbursements, notary fees — are a sunk cost that only time amortises: recovering them on a resale after eighteen months requires an already substantial capital gain. And a specific trap awaits the Geneva buyer: if you benefited from the Casatax reduction, it required occupying the property as your primary residence — a quick resale can trigger repayment of the benefit. What Casatax gave, an early resale can take back.
Casatax: the three conditions, and the clawback of duties
The Casatax counter deserves closer attention, because it hinges on precise conditions that the buyer signs without always weighing them fully. The relief under article 8A of the law on registration duties rests on three cumulative conditions:
- the property is acquired in the canton of Geneva;
- it becomes your primary residence, maintained for at least three years;
- the purchase price is equal to or below CHF 1’394’928 — the ceiling is index-linked, this figure being the 2026 adjustment.
There is also a formal requirement that many discover too late: you must file a declaration of effective use within two years of signing the notarial deed, one form per buyer, together with a residence certificate from the Cantonal Population Office and proof of moving in — a moving invoice, a change-of-address form validated by the Post Office. The administration is unambiguous about the penalty: “Your declaration will not be processed if the requested documents are not attached to the form. In that case, a clawback of duties will be notified.”
In other words, for anyone considering an early resale: the Casatax benefit is not secured on the day of the deed, it is confirmed afterwards, on the basis of documents, and it requires three years of genuine occupation. A resale before that term, or a move that prevents the use from being established, exposes you to a clawback. Add this amount to the “what the sale would cost” column of your decision table — it is a fixed line item, not open to negotiation.
Emergency exit No. 1: reinvestment (remploi)
If the property being resold is your primary residence and you are buying another one, the reinvestment mechanism (remploi) allows you to defer IBGI — subject to deadline and reinvestment conditions. For the early reseller, this is the lever that changes everything: the 50% rate does not disappear, but its payment is deferred as long as the gain remains invested in your home. The full mechanics of selling and buying at the same time — including the order of operations — has its own dedicated guide.
Emergency exit No. 2: selling right, selling fast
The real risk for a seller in a hurry is not the tax — it can be calculated — but the rushed-sale discount: selling under time pressure means negotiating from a position of weakness. The remedy is methodical: an estimate anchored in actual sales, a fair asking price that captures the decisive early weeks, and a well-prepared property. A correctly positioned property sells quickly without a discount — it is unprepared haste that costs money, not speed itself.
The special case: the development zone
A reminder that often surprises: a property bought in a development zone remains under State control for ten years — capped resale price, conditions to be met, an occupancy obligation. Reselling early there is not just costly, it is regulated: our guide to new-build properties in Geneva details this regime. Check your property’s status before any project — the answer entirely changes the strategy.
Deciding: sell now or wait?
The decision is made on a three-line table: what the sale would bring in today — a real, not hoped-for, estimate —, what it would cost — IBGI at your bracket’s rate, bank penalty, possible Casatax clawback —, and what six or twelve months of waiting would change in these figures. Sometimes waiting for an IBGI threshold or the maturity of a fixed rate is worth tens of thousands of francs; sometimes opportunity or life circumstances take priority, and the best sale is the one made without delay — but with full knowledge of the facts. This is exactly the calculation we work through with you, figures on the table. Technical terms are in the glossary.