Premium stability in private health insurance: what studies show and what really counts

The most reliable source on premium stability in private health insurance is the long-term analysis by the PKV-Verband. From 2006 to 2026, private health insurance premiums rose by an average of 3.4 percent per year, and statutory health insurance contributions by 3.9 percent. The analysis combines the data of the member companies across all plans and age groups.

Important for context: historical values describe a trend, not a guarantee. Rising treatment costs, medical progress and interest rates affect both systems, only with a time lag and spread differently.

A comparison of premium stability between insurers shows a wide range. Some plans rose much more than the average over twenty years, others stayed clearly below it. The drivers come from the calculation: the age structure of the people in the plan, the assumed actuarial interest rate, the claims ratio and the company's reserve policy. Insurers with conservative calculations and a high reserve for no-claims refunds show the calmer development over several years. Generously calculated entry premiums, on the other hand, are caught up by reality later.

Reliable sources for your own research are the WIP reports, the Map-Report and the publications of BaFin. We recommend that you do not judge premium stability only by the industry average but look back at the specific plan over at least ten years. Short-term jumps are normal. A long-term trend is the reliable figure.

A private health insurer may only adjust the premium if the actual insurance benefits or life expectancy differ from the calculation above a set threshold, ten percent by law and five percent in many policy conditions. The basis is § 203 VVG. An independent trustee must review and approve every adjustment.

Each insurer sets the triggering factor in its own policy conditions, and that is exactly an underrated point of comparison. A high factor means rare but larger increases, a low factor shorter intervals with smaller adjustments. The adjustment always applies to the whole plan, never to the individual contract. How many bills you submit yourself has no influence on the adjustment. This mechanism explains the typical rhythm: several years without an increase, then a noticeable jump that catches up with the accumulated cost development.

The common assumption that the statutory contribution is stable does not stand up to the data. The statutory maximum contribution rose from €789.53 in 2017 to €1,226.44 in 2026, an increase of 55.3 percent. The increases only arrive more quietly there, because they are spread across the contribution rate, the Zusatzbeitrag (i)ZusatzbeitragThe additional contribution each statutory health insurance fund charges on top of the general rate. Its level differs from fund to fund.More about Zusatzbeitrag → and the Beitragsbemessungsgrenze, which rises every year, instead of appearing in a letter with a new premium amount.

You will find the comparison of the key figures in the comparison table further up on this page.

Behind the long-term trend is a structural difference. With €351 billion in ageing reserves, an average of €38,800 per insured person, private health insurance sets aside capital for the higher health costs of old age. Statutory health insurance is financed on a pay-as-you-go basis. It has no such provision and reacts to demographics and cost pressure directly through the contribution rate. Its financial reserves of €2.1 billion equal around three days of spending.

For the individual insured person, this means: the structure of private health insurance dampens the rise in old age, but the specific plan decides how much. The page on private health insurance in old age explains the mechanisms in detail.

The most common question in our advice work is: which plan is actually stable? Our answer is always the same: stability is not a general feature of an insurer but the result of looking back at the specific plan.

When you choose a plan, we recommend that you obtain the historical adjustment rates of the specific plan over ten years. We compile exactly this data as part of our advice before a plan decision is made. The timing of the check is not a detail. If you only want to switch after years because of an increase, you leave behind ageing reserves and your favorable entry age. That is why you check premium stability before you sign. Afterwards, the lever is small.

No. No insurer may guarantee constant premiums, because by law the calculation is tied to the actual development of costs. If someone advertises with promises of stability, they always mean the past, never the future.

Usually the opposite. Aggressively calculated entry premiums have to be readjusted more often and more strongly as soon as real costs catch up with the calculation. A moderate starting premium with a conservative calculation is often the cheaper choice over twenty years.

Because adjustments under § 203 VVG always affect the whole plan, not the individual contract. Your personal behavior has an effect elsewhere: if you stay claim-free, many plans pay you a no-claims refund.