How high should your deductible be?

This is an exercise on choosing your health insurance deductible. You answer a few questions about risk and your expected healthcare costs, see which deductible a simple model would pick, and compare it with what you would choose yourself.

The exercise is also an opportunity to reconsider your choice for next year. If you want to lower your deductible, your insurer must receive your notice by 30 November; raising it has a later deadline. Complete your comparison ahead of time, so we can discuss your reasoning in the tutorial on 30 November. See the official notice rules for details.

If you are not in Swiss basic insurance, for example because you are an EU/EFTA/UK student covered at home or have an approved exemption, do the exercise as if you had a Swiss policy, using the example premiums. See the official rules for foreign students.

Your deductible

Optional. Your answers are saved in this browser only.

Methods & sources

Risk questions

The income questions come from the Health and Retirement Study (Barsky, Juster, Kimball and Shapiro, 1997), in the six-category version of Kimball, Sahm and Shapiro (2008, Table 1): the risky job doubles income or cuts it by 10%, 20%, one third, 50% or 75%. Under constant relative risk aversion (CRRA), each answer gives a bound on γ; the income level cancels out. The model starts at the middle of your range, or at γ = 10 if your range has no upper end. These are teaching choices, not the published estimation method. Using a parameter about lifetime income for one year of healthcare costs is an assumption.

Barsky et al. (1997) · Kimball et al. (2008) · Original questions

The model

For each deductible, the model computes what you pay in each cost scenario (premium, deductible, then 10% up to CHF 700) and picks the option with the highest expected CRRA utility of what is left of W. Biener and Zou (2024) compare Swiss deductibles the same way and also use W = CHF 10,000. The certainty-equivalent cost turns expected utility back into francs.

Biener & Zou (2024)

Cost chances

You give the percent chance for each of five cost ranges, adding up to 100%, as in the density questions of the New York Fed's Survey of Consumer Expectations (Armantier et al., 2017). Within the first four ranges, costs are spread evenly. Above CHF 9,500 every deductible has reached its cap, so the exact amount in the top range does not matter. The example values are the shares of people aged 21 to 25 in each range in 2025, from the Federal Office of Public Health (EFIND 2025, table 3.2, gross benefits), rounded.

Armantier et al. (2017) · BAG: costs per insured person

What the model leaves out

It uses standard adult cost-sharing only: no hospital daily fee, maternity exemption, higher coinsurance on some medicines, subsidies or non-covered care. Children have other deductibles and a CHF 350 cap. Your use of care is the same for every deductible. Payment timing, borrowing limits and other financial risks are not modelled.

Swiss insurance rules

Notice to lower a deductible for the following year must reach the insurer by 30 November. Raising it has a later deadline, with mid-December recommended.

BAG: Optional deductibles · Priminfo: cost-sharing and notice rules

Charts use Plotly.js 3.1.0 under the MIT license.