Swiss health insurance cancellation — Nov 30, in writing.

The deadline to cancel your Swiss basic health insurance is 30 November. The cancellation letter must arrive by that date — not be posted by it. It must be in writing, and most insurers require proof that you’ve signed up with a new insurer for 1 January. Miss this date and your current contract rolls over for another year, at the new premium. The rule is simple. The mechanics are the part most expats get wrong.

The federal rule, in one paragraph.

Article 7 of the Federal Health Insurance Act (KVG) sets the rule. Every Swiss resident with basic health insurance has the right to cancel ordinary basic coverage by 30 November, for the contract to end on 31 December. The cancellation has to arrive at the insurer in writing, by that date. Most insurers add one practical condition: confirmation that you’ve signed up with a new insurer starting 1 January. Without that confirmation they won’t release you — because Swiss law requires uninterrupted basic coverage, and they’re the legal coverage of last resort until you prove otherwise. The full statute lives at fedlex.admin.ch.

Arrived, not posted.

This is the single most common expat mistake. Make it sticky.

The deadline is the arrival date, not the postmark. A letter posted on 28 November that reaches the insurer on 2 December is invalid. Swiss case law treats arrival as the binding moment for cancellation deadlines. The post receipt from Einschreiben (registered mail) is your legal proof of timely delivery — keep it.

The practical rule we apply: mail by 25 November. Three working days of postal buffer covers any combination of weekend, public holiday, or year-end mail volume. Some insurers also accept email or their own online cancellation form, but most do not — and the ones that do still expect arrival by 30 November via whichever channel you choose. If unsure, send registered post. It costs CHF 6 and removes every ambiguity.

We’ve seen perfectly written cancellations rejected because they arrived on 1 December. The Swiss postal system is fast, but not instant — and the insurer’s deadline isn’t a courtesy.

What the letter must contain.

The legal requirements are short. The letter needs your full identifying details, the policy reference, the cancellation effective date, and your signature. Most Swiss insurers don’t require a specific form — any clear written cancellation works as long as it contains the right information.

The English template below is the one we draft for clients. Copy, adapt to your details, send by registered post:

[Your full name]
[Your full address]
[Your AHV / social security number]
[Date]

To: [Current insurer's full name and address]

Subject: Cancellation of basic health insurance (KVG) — policy number [XXXX]

Dear Sir / Madam,

I hereby cancel my basic health insurance policy with [insurer name],
policy number [XXXX], with effect from 31 December [year], in
accordance with Article 7 KVG.

I have signed up for basic insurance with [new insurer name] effective
1 January [next year]. Please find confirmation attached.

Please confirm cancellation in writing.

Yours sincerely,

[Your signature]
[Your printed name]

German and French versions of the template are available — drop us a line if you need them. The structure is the same; the salutations, subject line wording, and reference to Article 7 KVG (or its French equivalent under LAMal) just change to match the insurer’s language.

The one exception — the extraordinary right of cancellation.

The lever most expats miss. Make it prominent.

Article 7 paragraph 2 of the KVG gives you a separate, year-round right of cancellation: when your insurer changes the terms of the contract — most commonly when they raise the premium — you may cancel within one month of the notification, with the cancellation arriving by the end of the month before the new premium takes effect.

How this works in practice:

Annual cycle. The premium letter arrives in late September (insurers must notify by 31 October at the latest). New premium is effective 1 January. The standard 30 November deadline applies — and is, in fact, an instance of the same extraordinary right, because the premium is changing. For most readers, the November 30 deadline and the extraordinary right line up to the same date for end-of-year switches.

Mid-cycle change. If the premium increase is communicated mid-cycle (rare on basic insurance, more common on supplementary), the extraordinary right applies independently of the November 30 ordinary deadline. Your insurer announces a price hike effective 1 June; the extraordinary right runs until the end of May for a 1 June effective date.

Mechanics. Same as the ordinary cancellation: in writing, registered mail, with proof of new coverage starting on the same day the old coverage ends. The new insurer must accept you under Article 4 KVG, regardless of timing.

The extraordinary right exists separately from the November 30 ordinary deadline. It does not replace it; it sits alongside it. We use this lever most often when supplementary insurance terms change — a benefit reduction, a premium jump, a contract restructuring. The right is in the law; the timing is tight.

Supplementary insurance is different.

The most common conflation. Basic and supplementary are different contracts under different laws with different cancellation deadlines.

Basic (KVG) — 30 November deadline, federal law, identical benefits across insurers under Article 25 KVG. Acceptance at the new insurer is mandatory regardless of health. Switching basic is administratively safe.

Supplementary (VVG) — governed by the individual contract under the Insurance Contract Act. Most insurers require 3 months’ notice for an end-of-year cancellation, meaning the deadline is end of September — two months before the basic deadline. Some supplementary policies have multi-year contracts (typically 2 or 3 years) with auto-renewal that further restrict cancellation windows. Read your specific supplementary contract before sending the letter.

The underwriting cliff. This is the editorial centre of the basic-vs-supplementary distinction. Once you cancel a supplementary policy, the new insurer underwrites you with a health questionnaire under Article 4 VVG. Pre-existing conditions can be excluded or trigger full rejection. Cancel a supplementary you might want back, and you may not get equivalent terms again. Ever.

We say “stay” on supplementary more often than we say “switch.” Especially after age 45, after any chronic diagnosis, after pregnancy. Basic switching is harmless. Supplementary switching is one of the easiest ways to lose coverage you’ll need later. The longer reframe — when switching is the right call versus when it isn’t, and the four levers that actually move your bill — sits at our switching pillar page. The sequencing rule when you do switch supplementary: confirm written acceptance from the new insurer before sending cancellation to the old. Cancel-then-apply is the bad order. Apply-then-cancel is the right order.

The cancellation timeline, step by step.

What happens if you miss the deadline.

The practical answer to the panic question.

Your current contract auto-renews at the new premium for one more calendar year. You retain the regular right to cancel for the following year by the next 30 November. You retain the extraordinary right of cancellation if the insurer raises the premium again, or changes contract terms, mid-cycle. None of these unlock a retroactive switch.

You cannot switch basic insurance mid-year just because you regret missing the deadline. The federal law does not provide that path. The narrow exceptions: moving canton (verify your insurer operates in the new canton — most major insurers do, but some smaller cantonal insurers don’t), changing employer where the employer-tied insurer applies (rare under KVG, more common on supplementary), or qualifying for Prämienverbilligung (cantonal premium subsidy, French abbreviation IPV) that triggers a cantonal switch. None of these is the routine path.

The constructive answer: read the letter the week it arrives next September, sequence the paperwork against the November deadline, and don’t wait until 25 November to start drafting.

The four traps applied to cancellation.

The longer reference on each trap — federal-law foundation, the typical misunderstanding, the cost, what we do — sits in the four-traps deep dive.

These four traps map directly to the cancellation decision. The age-curve trap is the supplementary-cancellation trap — chasing a CHF 30/month basic saving by cancelling supplementary held at the same insurer, then facing punishing terms on supplementary re-application after age 45 or after any health-status change. Always separate the basic and supplementary decisions; cancellation of supplementary needs its own justification beyond a cross-sell discount. The three-month deadline confusion is the most literal version of this trap on this post — the 3-month deadline applies to new arrivals registering for basic insurance under Article 3 KVG; the 30 November deadline applies to existing residents changing an established policy under Article 7 KVG. Different rules, different penalties. Coverage that pays vs coverage that fights matters less on basic (federally identical) and more on supplementary — switching to a cheap insurer with poor claim handling costs more than the saving in the first denied claim. And matching coverage to your life is the cancellation question itself: most readers spend five minutes on the date and zero minutes on the decision behind it.

Sometimes the right move is no move.

Three situations where the right answer is to keep what you have:

You’re mid-pregnancy or have a planned procedure. Keep supplementary as is — the underwriting cliff on switching during any active health situation is brutal; pre-existing conditions on the new policy trigger exclusions or rejection. Switch basic if the maths works (basic acceptance is mandatory regardless of health); leave supplementary alone until the situation resolves.

You’re already on a Hausarzt model with a doctor you trust. Switching insurer to save CHF 30/month and losing the GP relationship is rarely the right trade. The model works because of the relationship, not because of the discount. Some insurers don’t have a Hausarzt network in your specific canton; verify before assuming the model transfers.

Your premium increased less than 2%. Below the noise floor of switching cost. Time spent reading three competing letters, drafting cancellation paperwork, applying to a new insurer, and tracking the transition is real. Below 2% increase, the saving usually doesn’t clear the threshold. Reread the letter next year.

We say “stay” more often than we say “switch.” That’s the advisor difference.

When the deadline is genuinely worth running through with us.

Three signals that this year’s cancellation question warrants a 45-minute review:

• Premium up more than 5% AND family situation changed in the past year — marriage, child, separation, partner moved canton, employment change
• Your current model (Hausarzt, HMO, Telmed, Pharmed) is being retired or restructured — auto-roll to Standard adds CHF 60–150/month per adult that nobody warned you about
• You haven’t reviewed your Franchise in 3+ years — premium impact of the right Franchise versus the wrong one is typically CHF 600–1,500/year

We cover the broader change-season audit in Swiss health insurance changes for 2027; the model-decision context lives in Swiss health insurance models explained.

The honest answer.

The 30 November deadline is one date, but the decision behind it touches Franchise, model, supplementary, household composition, age curve, and what your year actually looks like. Most readers spend five minutes on the date and zero minutes on the decision. The audit flips that ratio.

We read the Swiss insurance contracts so you don’t have to. The cancellation deadline is mechanical paperwork — registered mail, the right wording, arrival before the deadline, the new-insurer confirmation attached. The decision behind the paperwork is the conversation worth having, and it’s the part the audit handles. Free. Forty-five minutes. In English. With Robert or Hans.