What changes in Swiss health insurance for 2027.

Every late September, every Swiss household receives a letter from their basic health insurer telling them what they will pay next year. For 2027, the federal-average adjustment will be announced by the BAG in late September 2026 — and we’ll update this post the day it lands. What’s already certain is the maths around it. The average is rarely your number, most readers either panic-switch to the cheapest visible alternative or do nothing, and both are usually wrong. The right answer is calmer than the letter suggests, and the levers that move your bill are the same regardless of where the federal average lands.

Why this letter arrives every year.

Swiss basic-insurance premiums are recalculated annually. Each insurer submits proposed premiums to the Federal Office of Public Health (BAG / FOPH’s supervisory branch) by canton, age group, and chosen model. The BAG approves them; insurers issue letters to policyholders. The letter is not a marketing move. It’s a regulated annual recalculation under the federal health-insurance system. Your premium changing — up or down — is a function of cantonal claim costs, age-band recalibration, and your specific insurer’s portfolio performance. Read it as a regulatory document, not a sales notice.

What the 2027 letter actually contains.

The letter is short. Page one carries the four data points that matter; page two carries the regulatory reference text most readers skip. Find the four data points before deciding anything:

• New monthly basic premium (KVG) — the headline number. This is what changes annually.
• Supplementary premium (VVG) — usually a separate letter from the same insurer group, but legally a different contract under different law.
• Current Franchise (deductible) and the option to change it for the new year.
• Current model (Standard, Hausarzt, HMO, Telmed, Pharmed) and any availability changes — some insurers retire or restructure model offerings each year, often noted on page two in small type.

The reframe — why “should I switch?” is the wrong first question.

Switching to the cheapest visible insurer rarely saves what readers think it saves. Swiss basic-insurance benefits are identical at every insurer by federal law under Article 25 KVG — every insurer covers the same doctor visits, the same hospital care at the general ward in your canton, the same medications on the federal list, the same maternity care. Coverage doesn’t change when you change insurer; price does, model availability does, customer service does. The medical care doesn’t.

So the question is never “which insurer is best.” The question is: what actually moves the bill, and which of those levers fits my life right now. Three levers do real work. Most readers know about one and a half of them.

Lever one — the Franchise (deductible).

Six legal Franchise tiers for adults under Article 64 KVG: CHF 300 (default), 500, 1,000, 1,500, 2,000, 2,500. Premium discount per tier is regulated. The maths is straightforward: higher Franchise, lower monthly premium, higher out-of-pocket if you actually need care.

The decision rule, one sentence each:

• Healthy, no recurring care — high Franchise (CHF 2,500) usually pays. The premium saving comfortably exceeds expected out-of-pocket in a typical year.
• Pregnant, planned surgery, chronic condition, dental work scheduled — low Franchise (CHF 300) almost always pays. You’ll hit the deductible regardless; minimise the threshold.
• Mid-thirties, occasional GP visits, no diagnosed conditions — CHF 1,500 is the underrated middle. Premium discount of around CHF 800/year against a tolerable out-of-pocket cap.

We do this calculation in twelve minutes during a first review. Most readers haven’t done it since they signed up.

Lever two — the insurance model.

Five model families: Standard (free choice of doctor, full premium), Hausarzt (designated GP, ~7–15% discount), HMO (group practice, ~10–20% discount), Telmed (phone/video first contact, ~8–15% discount), Pharmed (pharmacy first contact, ~5–12% discount). Plus newer digital-first hybrid products like Sanitas Compact One and KPT KPTwin.smart that push savings to ~22%. We cover the full model walkthrough in Swiss health insurance models explained — don’t duplicate that depth here.

The 2027 angle: model availability changes annually. Some insurers retire or restructure their HMO products in specific cantons; some launch new digital-first hybrids; some add new Telmed providers. The letter notes availability changes on page two, often in small type. The auto-roll consequence: if your current model disappears for 2027 and you don’t act, the insurer typically rolls you to Standard — the most expensive option. The premium increase from a forced auto-roll can be CHF 60–150/month per adult that nobody warned the client was coming.

The audit catches this on page two. The client doesn’t read page two. That’s the gap.

Lever three — split basic and supplementary across insurers.

The under-published lever, and the one most expats don’t know is allowed. Most clients assume basic + supplementary must live with the same insurer. They don’t. Swiss law explicitly allows basic and supplementary to sit with different providers — they’re governed by two different laws (KVG for basic, VVG for supplementary), underwritten as two different contracts, with different cancellation rules and different acceptance regimes.

Why splitting can save. Insurer A is cheap on basic in your canton, age band, and chosen model. Insurer B has the strongest semi-private hospital supplementary for your age curve. Bundling at one insurer rarely produces the best of both. The “discount for staying together” that insurers advertise is typically a 5–15% reduction on the supplementary premium — usually less than the difference you’d save by holding basic and supplementary at the right insurer for each.

Why most people don’t. Insurers cross-sell aggressively. Bundle marketing is loud at signup. Most clients accept the bundle by default without comparing the unbundled alternative. We see clients overpay CHF 30–80/month on basic to keep a 5% bundle discount on supplementary that’s worth far less.

The catch. Supplementary insurance is underwritten by health questionnaire (Article 4 VVG). Once you cancel a supplementary policy, you may not get equivalent terms when you re-apply elsewhere — pre-existing conditions can trigger exclusions or rejection at the new insurer. Drop a supplementary you might want back, and you may lose it for life. The split-insurance lever works when you’re moving basic to a cheaper insurer while keeping current supplementary stable. It fails badly if you cancel solid supplementary chasing a small basic-insurance saving and can’t re-acquire equivalent cover.

The rule we apply: switch basic, keep supplementary unless there’s a specific reason to move both — and the specific reason needs to clear underwriting before the cancellation goes out.

The mechanics — dates, paperwork, what arrives when.

The four traps applied to the change season.

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

The four-traps reference and the switching-decision frame — when staying beats switching, and the four levers that actually move your bill — sit at our switching pillar page. These four traps map directly to the 2027 change-season decision. The age-curve trap appears on supplementary: switching at 32 to chase a CHF 40/month saving, then facing a CHF 200/month gap at 55 because the new insurer’s age curve is steeper than the old one. The entry premium isn’t the lifetime cost; read the curve, not the headline. The three-month deadline is commonly confused with the November 30 deadline — they’re different rules. The 3-month deadline applies to new arrivals registering for basic insurance under Article 3 KVG; the November 30 deadline applies to existing residents changing an established policy. Coverage that pays vs coverage that fights matters less on basic (federally identical) and more on supplementary — a cheap supplementary insurer with poor claim handling costs more than the saving in the first denied claim. And matching coverage to your life is the change-season audit itself: most clients either over-insure (insurer cross-sells) or under-insure (chase the cheapest line). The lever choice depends on what your actual year looks like.

Sometimes the right move is no move.

The counter-intuitive section, on brand. Three situations where the right answer is to keep what you have:

You’re in active treatment, mid-pregnancy, or recently diagnosed. Keep the supplementary you have. The underwriting cliff on switching supplementary is brutal during any active health situation; 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 and you can apply to a new supplementary insurer cleanly.

You’re already on a good model with a doctor you trust. Hausarzt with an established GP relationship, or HMO at a clinic that’s worked for your family for three years — switching insurer to save CHF 30/month and losing the GP relationship is rarely the right trade. The model is a tool that works because of the relationship, not because of the discount.

Your premium increased by less than 2%. That’s likely 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 change is genuinely worth running through with us.

Three signals that this year’s letter actually warrants a 45-minute review:

• Premium up more than 5% — clearly above the noise floor; lever-rerun usually finds something
• Family situation changed — marriage, child, separation, partner moved canton, employment status change
• You haven’t reviewed your Franchise in 3+ years — the default-from-signup case. Premium impact of the right Franchise versus the wrong one is typically CHF 600–1,500 a year

When relocation timing complicates the question.

A practical edge case worth flagging. New arrivals to Switzerland have three months from registering residence with their Gemeinde to take out basic insurance under Article 3 KVG. Existing residents have until 30 November each year to change basic insurance for the following 1 January. The two deadlines are routinely confused. If you arrived in summer or autumn 2026 and your 3-month-from-registration deadline lands close to the 30 November change-season deadline, you may have a one-shot opportunity to enrol and immediately switch effective 1 January — but the sequencing is fiddly. The audit handles the timing; for the broader relocation logistics around paperwork and cantonal registration, relofinder.ch is the partner we route clients to when the question is bigger than insurance.

The honest answer.

Most 2027 premium letters don’t require a switch. Many require a Franchise rerun or a model check. A meaningful minority — roughly the third of our annual audit clients with substantial year-on-year changes — benefit from a basic-insurance switch alone, with supplementary kept stable at the existing insurer. A smaller minority benefit from the split-insurance approach, where basic moves to a cheaper insurer while supplementary stays where the cover is strong. Almost nobody benefits from switching both at once on the basis of a headline price comparison.

We read the Swiss insurance contracts so you don’t have to. The 2027 letter takes us twelve minutes per household. We catch the trap, run the lever maths, and tell you whether to move or stay — and which lever to pull. Free. Forty-five minutes. In English. With Robert or Hans.