The graph below shows in 3 tabs the 2021 premium per month, the 2020 premium and the difference between the two per year, for each health insurance provider and policy combination.
These are monthly premiums for the (in most cases mandatory) basic health insurance, excluding discount and any premiums for (voluntary) supplementary insurance.
If you opt for a voluntary excess on top of the mandatory excess of 385 € per year, these premiums will be lower. For instance if you opt for a voluntary excess of 500 €, bringing the total excess to 885 €, you could expect a drop of about 20 € in monthly premiums.