The nine-tenths rule is the KVdR prior-insurance test: a pension applicant generally needs statutory GKV cover during at least 90% of the second half of working life. That period runs from first employment to the pension application; compulsory, voluntary and family GKV membership can count. Deutsche Rentenversicherung explains the test and the three-year credit for each eligible child.
Sabine's 45-year career
Sabine first worked at 22 and applies for pension at 67: 45 years total, 22.5 in the second half, and a 90% requirement of 20.25 years. She had private cover until 48, giving 19 counted GKV years from 48 to 67 if she returned then. Without other credits, she is short by 1.25 years. One qualifying child adds three credited years, lifting counted time to 22 and allowing the 20.25-year test to be met in this simplified illustration.
Contribution consequence is category-specific
The benefit of KVdR is not a universally fixed €300/month saving. BMG's contribution guide says compulsory retirees can owe contributions on statutory pension, occupational pension and qualifying self-employment income, whereas voluntary members can also have rental and capital income assessed. Both are subject to the 2026 €5,812.50 monthly contribution ceiling and the actual fund's added rate and care contribution.
Returning from PKV is conditional
Private-insurance years in the second half do not count as GKV years. A person considering a switch back to GKV after age 55 must check the separate five-year/status restrictions, not accept the categorical claim that the door always closes on the birthday. Federal Health Ministry lists the cumulative conditions. Ask the insurer to calculate your prior-insurance record before assuming child credit or a change of tariff secures KVdR.
