What are aging reserves?
Aging reserves (Altersrückstellungen) are capital reserves that private health insurers in Germany are legally required to build for each policyholder.
A portion of each monthly premium is invested in capital markets. This capital accumulates over time and is used to offset the rising healthcare costs that naturally occur with age.
Why they matter
Without aging reserves, private insurance premiums would rise steeply as policyholders age and require more medical care.
With aging reserves:
- Premiums are front-loaded — slightly higher in younger years
- The accumulated capital absorbs future cost increases
- At retirement age, reserves often reach significant six-figure sums
- This creates a fundamentally different cost trajectory than pay-as-you-go systems
GKV vs. PKV: Cost trajectory over your lifetime
The fundamental difference between the two systems becomes clear when you look at how costs develop over decades:
Age
* GKV cost trajectory shown applies to voluntarily insured retirees (freiwillig versicherte Rentner), who pay contributions on all income — including pensions, rental income, dividends, and capital gains. Retirees eligible for the KVdR (Krankenversicherung der Rentner) pay significantly less, as contributions are based only on statutory pension and company pension income.
Accumulated Aging Reserves
€0The 10% statutory surcharge (collected age 21–60) adds an additional reserve layer used exclusively to reduce premiums after age 65.
The 10% statutory surcharge
Since 2000, German law requires PKV insurers to collect an additional 10% surcharge on premiums between ages 21 and 60.
This surcharge is invested separately and used exclusively to reduce premiums after age 65.
This mechanism provides an additional layer of premium stability during retirement.
What happens to aging reserves when switching insurers?
Since the 2009 reform, a portability rule applies:
- If you switch PKV providers, a standardized portion of your reserves (corresponding to the Basistarif) transfers to the new insurer
- Reserves above the Basistarif level remain with the original insurer
- This makes switching between PKV providers possible but potentially costly
Choosing the right insurer from the start is therefore a critical long-term decision.
Why early entry maximizes the benefit
The earlier you enter PKV, the more time your aging reserves have to compound.
A 28-year-old entering PKV today will have accumulated substantially more reserves by retirement than someone entering at 38 — even with identical premiums.
This is why timing matters: every year of delay reduces the stabilizing effect.