CSS in canton Aargau: twelve years of premiums
In canton Aargau, the lowest CSS premium went from CHF 298.70 a month in 2015 to CHF 487.00 in 2026 — a rise of +63.0 %. The table below places it next to the canton's cheapest insurer, year by year.
| Year | This insurer | The cheapest | Gap |
|---|---|---|---|
| 2015 | CHF 298.70 | CHF 250.40 | CHF 48.30 |
| 2016 | CHF 324.00 | CHF 289.80 | CHF 34.20 |
| 2017 | CHF 343.60 | CHF 330.50 | CHF 13.10 |
| 2018 | CHF 352.80 | CHF 341.30 | CHF 11.50 |
| 2019 | CHF 369.60 | CHF 357.80 | CHF 11.80 |
| 2020 | CHF 369.60 | CHF 360.50 | CHF 9.10 |
| 2021 | CHF 367.10 | CHF 347.50 | CHF 19.60 |
| 2022 | CHF 361.20 | CHF 350.30 | CHF 10.90 |
| 2023 | CHF 391.40 | CHF 372.15 | CHF 19.25 |
| 2024 | CHF 421.80 | CHF 403.00 | CHF 18.80 |
| 2025 | CHF 463.30 | CHF 423.10 | CHF 40.20 |
| 2026 | CHF 487.00 | CHF 453.80 | CHF 33.20 |
Faster or slower than the rest?
CSS rose +63.0 % over the period, against +81.2 % 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: +9.8 % in one go. The premium did not move in 2020.
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.