Underinsurance after damage: calculation, guarantee and legal help

1. Identify the actual reason for reduction

Ask whether the insurer relies on underinsurance, a payment ceiling, excess or another valuation method. All can reduce payment but are different. Record the provision and amount per deduction. Current-value arguments differ from a total sum set too low. Without breakdown you cannot properly check what is reduced. Request calculation and conditions used, not just the final payment or general policy reference.

2. Compare the same valuation basis

Identify the policy’s value for the insured interest. A building’s relevant value may differ from sale price; possessions can have another measure too. Compare sum insured and assessed value on the same date and basis. Do not mix figures from reports without explanation. Ask about components, alterations and indexation. A lawyer with valuation expertise can check the comparison. A high appraisal figure is not automatically the right sum for every policy type.

3. Read guarantee and conditions together

Check whether the schedule provides an underinsurance guarantee and its conditions. In a particular building case Kifid assessed a policy with both guarantee and maximum. The guarantee’s name does not describe the whole contract. Keep valuation tools, questionnaires and validity details. Check how changes were notified. Currency and information supplied may matter. Have the actual text assessed rather than reading guarantee as an unlimited payment promise.

4. Check the calculation step by step

Ask the insurer to show inputs, valuation date and each operation. Find where figures diverge rather than only calculating the final difference. Is it total value, damage amount, clause or ratio? Support your alternative and identify uncertainty. Give an expert the correct question. Independent assessment may suit damage-amount disputes, but define costs and assignment. Coverage investigations do not automatically follow the same cost basis.

For property insurance subject to proportional reduction under article 7:958(5) BW, payment is reduced where the sum insured is below the value used in calculating damage. The starting point is relevant compensation multiplied by sum insured divided by that insured value. Numerator and denominator must use the same basis. First check guarantees, valid appraisal or different contractual calculation rules. Excess and separate ceilings are other operations; assess their order separately. This is not a universal formula for every non-life policy.

5. Examine advice and earlier checks

If an adviser set the sum or promised review, collect instructions, advice and correspondence. Kifid describes care depending on circumstances and agreed service. Your own information and changes reported may matter. An adviser error does not automatically prove the full loss claimed. A lawyer must assess what would have happened without it and resulting damage. Keep that liability question separate from the insurer dispute over actual cover under the existing policy.

6. Make your challenge specific and timely

For each point set out insurer calculation, alternative and source. Request written reassessment and use internal complaint if needed. Assess final settlement only once you know which items it closes. Increasing the sum for the future does not automatically fix historical damage. Monitor deadlines too. For urgent repair costs, a lawyer can assess a defined advance or another step fitting the file.

7. Fictional example: proportional reduction

Fictional calculation: property insurance uses a €100,000 insured value and €80,000 sum insured. Relevant damage before other operations is €20,000. If proportional reduction applies, €20,000 multiplied by €80,000 divided by €100,000 leaves €16,000 before excess or a separate limit. All values are assumed to use the same basis, with no guarantee or different rule excluding reduction. It promises no payment in a real case. If the schedule has an underinsurance guarantee, examine that first; it does not automatically remove a separate contractual ceiling.

8. Checklist for legal assessment

Ask which value, clause or advice agreement is decisive. Discuss expert need, assignment and costs. Consider appropriate future cover without prejudging the past.

• Policy, conditions, guarantee and payment ceilings.
• Valuation tools, appraisals and reference dates.
• Full damage calculation supporting each deduction.
• Indexation, changes, advice and aftercare agreements.
• Challenge, reply, settlement offers and deadlines.

9. Match each disputed point to the right document

Create four separate entries in your file. The sum insured calls for the policy schedule on the loss date and any amendment confirmations. The total insured value calls for the report, valuation basis and included components. A limit calls for the actual clause, including indexation. The damage amount calls for an itemised repair estimate. Record what is established and disputed for each entry. This avoids requesting a new damage estimate when the real difference concerns a contractual ceiling.

When checking your policy, show which value was used before and after alterations. A photograph of an extension helps demonstrate the change but does not establish the applicable insured value on the loss date. If necessary, ask an expert to identify the relevant components and valuation date explicitly. When considering a second expert, discuss whether the instructions concern the damage amount, total value or both. An expert determining a repair price does not thereby decide how a guarantee clause should be interpreted.

10. Separate a possible advice error from the policy calculation

Fictional file: after alterations, you emailed the adviser asking for a coverage review. Following a loss, the insurer applies a lower insured amount. Retain the original email, reply, advisory instructions and policy schedule issued at the time. What the existing policy pays is different from whether the adviser should have acted on your request. For the second question, also investigate which insurance or amendment was actually available then, on which terms and what you would have chosen.

A calculated difference is not automatically a loss payable by the adviser. Assessing an insurance adviser’s liability requires the alleged error and its consequences to be examined separately. Have any settlement agreement with the insurer reviewed before signing if a claim against the adviser may still arise. An insurance settlement must make clear which parties and claims its wording covers. This fictional file assumes no established error, additional coverage or liability.