How to Prove a Home Insurance Claim Is Underpaid

Proving underpayment comes down to comparing the insurer’s number to evidence of what repairs actually cost. Here is how to build that case.

Get the Insurer’s Paperwork

Start by requesting the insurer’s decision in writing, plus the claim file. Ask for the adjuster’s inspection photos and the estimate, which is usually built in a software called Xactimate. The estimate lists every approved line item with quantities and prices, and it is the document you’ll be comparing against.

Get an Independent Estimate

Hire a licensed contractor, or a public adjuster who works for you rather than the insurer, to inspect the damage and write a detailed, line-by-line estimate. Ask them to use the same pricing format the insurer uses so the two documents can be compared directly. Make sure the estimate includes dated photos and, where relevant, moisture readings or expert reports.

Identify the Gaps

Compare the two estimates line by line. Common problems include missing items, such as code-required upgrades, drip edge on roofs, or antimicrobial treatment on water damage, along with below-market unit pricing, undercounted quantities, and heavy depreciation. Build a simple table showing each item, the insurer’s figure, your documented cost, and the shortfall. Include debris removal, permits, and required code upgrades if your policy covers them.

Submit a Supplement

A supplement is a written request for additional payment, supported by photos, itemized costs, and an explanation of why each added item is needed. Keep a timeline of your claim dates, inspections, document requests, and payments, because that record matters if you later dispute the process.

Use Appraisal if You Still Disagree

If you and the insurer disagree on the dollar amount rather than coverage, most Texas homeowners policies include an appraisal clause. Each side picks an independent appraiser, and the two choose an umpire. Appraisal can resolve amount disputes without a lawsuit. A federal court analysis in Texas has noted that paying an appraisal award can affect later claims for penalties, so talk to an attorney before invoking it on a large claim.

Know the Legal Backstop

In Texas, you don’t have to prove bad faith to show a prompt-payment violation. You must show that the insurer is liable for the claim and missed the statutory deadlines. Underpayment can also raise issues under Insurance Code Chapters 541 and 542, which an attorney can evaluate. You can also file a complaint with the Texas Department of Insurance at 800-252-3439.