CSS — Region 1, Valais: twelve years of premiums
Region 1, Valais: the lowest CSS premium went from CHF 366.30 a month in 2015 to CHF 499.70 in 2026 — a rise of +36.4 %. The table below places it next to this region's cheapest insurer, year by year.
| Year | This insurer | The cheapest | Gap |
|---|---|---|---|
| 2015 | CHF 366.30 | CHF 270.10 | CHF 96.20 |
| 2016 | CHF 374.40 | CHF 287.30 | CHF 87.10 |
| 2017 | CHF 366.40 | CHF 319.50 | CHF 46.90 |
| 2018 | CHF 382.50 | CHF 333.60 | CHF 48.90 |
| 2019 | CHF 404.20 | CHF 352.60 | CHF 51.60 |
| 2020 | CHF 410.20 | CHF 358.10 | CHF 52.10 |
| 2021 | CHF 402.10 | CHF 361.80 | CHF 40.30 |
| 2022 | CHF 397.00 | CHF 368.20 | CHF 28.80 |
| 2023 | CHF 411.60 | CHF 378.10 | CHF 33.50 |
| 2024 | CHF 442.80 | CHF 416.50 | CHF 26.30 |
| 2025 | CHF 476.60 | CHF 443.90 | CHF 32.70 |
| 2026 | CHF 499.70 | CHF 481.20 | CHF 18.50 |
Faster or slower than the rest?
CSS rose +36.4 % over the period, against +78.2 % for the cheapest insurer in the same place. The gap narrowed — which does not mean this insurer is the cheapest today, only that it climbed more slowly.
The year that hurt — The steepest year-on-year jump was 2025: +7.6 % in one go.
Figures for an adult, CHF 300 deductible, accident cover included — the only profile defined identically across all twelve years. Each year this is the lowest premium the insurer offered, all models combined.
CSS, canton by canton
Other insurers
Source: Federal Office of Public Health (FOPH), premium files from 2015 to today.