Can accident insurance cut my payout because of pre-existing conditions?
In short
Yes. German accident insurance can cut your payout because of pre-existing conditions if an illness contributed at least 25 percent to the injury or its consequences. The degree of disability then drops by exactly that share: 30 percent becomes 18 percent at a 40 percent share. Below 25 percent there is no cut, and the insurer has to prove the share.
What a contribution share means in euros and what pushing back costs. Examples without progression.
Example
Typical range
Basic sum EUR 100,000, disability 30 percent, no cut
EUR 30,000
Same case, contribution share 40 percent
EUR 18,000, so EUR 12,000 less
Court case, death benefit about EUR 25,565, cut 30 percent
about EUR 17,895 paid, about EUR 7,669 withheld
Independent medical counter report
about EUR 1,500 to 5,000
Court appointed expert, hourly rate for difficult causation questions
EUR 131 per hour
Complaint to the insurance ombudsman
EUR 0
As of October 2026.
The cut examples follow the model conditions,
report costs come from published ranges and the German Judicial Remuneration Act (JVEG).
The extra premium for a 50 percent threshold is a guide value from quoting practice:
usually a few euros a month.
Worked example
Fall onto the knee at 52
After a fall on the stairs the knee stays permanently limited. The insurer's report finds arthritis and sets its contribution at 40 percent.
Basic sum
EUR 100,000
Degree of disability under the limb table
20 percent
Share of the arthritis
40 percent
Reduced degree of disability
20 × 0.6 = 12 percent
The insurer pays EUR 12,000 instead of EUR 20,000. With a policy that waives the deduction, or with a proven share below 25 percent, it would be EUR 20,000.
What the contribution share means
Private accident insurance (private Unfallversicherung) only pays for the consequences of an accident. If an illness or infirmity, meaning a lasting abnormal condition of the body, made the injury worse, the insurer deducts that share. In German this is the Mitwirkungsanteil.
The model conditions of the German insurance association set the line at 25 percent. If the pre-existing condition contributed less, you get the full amount. From 25 percent upwards the degree of disability is reduced by the whole share, not only the part above the threshold.
Share of the illness in the report
Effect at 30 percent disability
20 percent
no cut, 30 percent remain
25 percent
cut to 22.5 percent
40 percent
cut to 18 percent
60 percent
cut to 12 percent
Contribution share or prior disability
Two deductions are often mixed up. Prior disability concerns a body part that was already impaired under the limb table (Gliedertaxe) before the accident, such as a stiff finger. That old value is subtracted from the new one.
The contribution share concerns an illness that made the consequences of the accident worse, even if you had no symptoms before. A typical example is arthritis in the knee that only starts to hurt and limit movement after a fall. Whenever your payout is cut, ask which of the two deductions applies.
The ruling of 3 December 2025
On 3 December 2025 Germany's Federal Court of Justice (Bundesgerichtshof) ruled in case IV ZR 185/24 that an indirect contribution of an illness can also lead to a cut. The insured man took blood thinners because of an inherited clotting disorder. After a fall with a minor head injury he died of a brain haemorrhage. The insurer paid 70 percent of the death benefit, and the court upheld the 30 percent cut.
What this means for you: if you take medication because of an illness, and the illness makes the accident consequences worse through that medication, expect a possible cut. The case concerned conditions from 1994. Newer conditions use similar wording, but what counts is the wording of your own policy.
Who has to prove the share
Under section 182 VVG the insurer must prove that an illness contributed and how large its share is. A line such as "degenerative changes, contribution 50 percent" without reasons is not enough. The medical report has to explain why the pre-existing condition accounts for exactly that share of the consequences.
If that explanation is missing, an objection is almost always worth it. Ask for the report, check whether the condition caused symptoms before the accident, and have the share reviewed by a doctor of your choice.
Policies that cut less or not at all
Many newer accident policies raise the threshold for pre-existing conditions to 50 percent, and some waive the deduction entirely. For anyone over about 45 this is one of the most important differences in the policy wording, worth more than a few euros of premium.
Also check whether spinal disc injuries and injuries from increased physical effort are covered. Insurers cut those claims for wear and tear particularly often.
Step by step
Read the settlement letter: does it say contribution share or prior disability, and at what percentage?
Request the medical report the insurer relies on.
Ask your GP whether the condition caused symptoms or treatment before the accident.
Have the share reviewed by a doctor, with a counter report for larger sums.
Object in writing, name the missing reasons and set a deadline.
If the cut stays, complain to the insurance ombudsman (Versicherungsombudsmann).
Checklist
Threshold for pre-existing conditions checked in your policy
Report with reasons for the percentage received
Medical records from before the accident collected
Difference between contribution share and prior disability clarified
Limitation period noted: three years from the end of the year the claim fell due
Common mistakes
Accepting a flat percentage without reasons
Assuming a condition without pain does not count
Choosing a policy on price and overlooking the threshold
Letting the insurer deduct contribution share and prior disability twice
Questions and answers
Frequently asked
Can the insurer cut for arthritis I did not know about?
Yes.
What matters is whether the arthritis measurably worsened the consequences, not whether you knew.
The insurer still has to prove the share.
Can the insurer cut because I take blood thinners?
According to the ruling of 3 December 2025, yes,
if the illness behind the medication contributes to the consequences through it.
The share still has to be proven.
Does the 25 percent threshold always apply?
No.
It is in the model conditions, your policy may set a higher threshold or waive the deduction.
Your own wording counts.
Is an accident pension cut as well?
Usually yes, because the pension depends on the degree of disability.
Daily hospital allowance may also be reduced, depending on the conditions.
Is there a deadline to challenge the cut?
The limitation period is three years from the end of the year in which the claim fell due.
Do not wait, as older records become harder to obtain.
Does a reassessment help?
If your condition gets worse, yes.
Both sides can request a yearly reassessment for up to three years after the accident,
