Tax Records to Keep After Flood or Fire Damage

One set of records, three reviews

After water or fire damage, the same photos, estimates and invoices are read three times. The insurance adjuster uses them to decide what the policy covers. Your CPA uses them to decide whether any loss is deductible and how the rebuild costs are treated. The Department of Buildings or your town building department relies on the scope of work to issue permits and sign off on the rebuild. Each review can come months after the work is finished, and the details that matter are easiest to record while the damage is still visible. We document conditions from the first visit for that reason. We are not public adjusters and do not negotiate claims.

We are contractors, not tax advisors. What follows explains how project scope, timing and paperwork affect what you can discuss with your tax professional. It is not tax, legal or accounting advice. Tax rules change and depend on your situation. Before you make decisions, consult a CPA. Outstanding Construction does not prepare tax returns and is not responsible for any tax position you take. The rules below were checked against IRS guidance in October 2026. For safety, power and drying in the first days after a loss, see our guide to first steps after a flood or fire.

Personal-use property in 2026

Under the One Big Beautiful Bill Act, the limit on personal casualty losses (opens an external site) was made permanent, and from 2026 the eligible losses were widened. The IRS states that a personal casualty loss deduction is no longer limited to losses attributable to federally declared disasters and may also include losses from state-declared disasters, provided all other requirements of Internal Revenue Code section 165 are met.

The usual reductions still apply. IRS Publication 547 (opens an external site) requires each personal casualty loss to be reduced by $100 and the total to be reduced by 10% of adjusted gross income, with special rules for certain qualified disaster losses. The election to claim a disaster loss on the prior year's return applies to federally declared disasters. In practice, a house fire, a burst pipe or a sewer backup that is not part of a declared disaster is generally not deductible for a personal residence, though many owners assume otherwise.

For basement flooding in New York City, Hurricane Ida in 2021 is the familiar example of a federally declared disaster. To check whether a current event has been declared, consult the FEMA disaster declarations database and announcements from the Governor's office, and confirm the result with your CPA.

Rental and business property

Casualty losses on rental and business property are not limited to declared disasters. Publication 547 explains that the loss is generally measured by the decrease in fair market value or the adjusted basis, whichever is less, reduced by insurance or other reimbursement; for property that is completely destroyed, the adjusted basis is used. These losses are reported in Section B of Form 4684.

Rebuilding a damaged building is generally a restoration under the federal repair and improvement rules (opens an external site), so the rebuild costs are usually capitalized rather than deducted, even when the work returns the property to its previous condition. If insurance proceeds exceed your adjusted basis, the result can be a taxable gain, and rules for postponing that gain may apply. Lost rent, temporary housing for tenants and the timing of insurance payments are also questions for your CPA.

Records checklist

• Photos and video of every affected room before cleanup, with dates, and of damaged materials before they are removed
• Photos of the property before the loss, if available, and purchase records and receipts for past improvements, which establish adjusted basis; for a home you live in, our guide explains how improvements, insurance payments and casualty losses change basis
• The insurance policy, claim number, adjuster estimates, correspondence and records of every payment
• Emergency mitigation invoices, such as water extraction, drying, board-up and roof tarping, kept separate from rebuild invoices
• Moisture readings and drying logs
• Rebuild estimates and invoices that separate work restoring prior condition from upgrades
• Permits, inspection results and sign-offs, and any fire department or incident report
• Appraisals, if any were made before or after the loss

Repair estimates, safe harbors and upgrades

Publication 547 (2025) describes safe harbor methods that individuals may use to measure the decrease in value of personal-use residential property. Two of them rest directly on contractor estimates. The estimated repair cost method uses the lesser of two repair estimates prepared by separate and independent licensed contractors, which must itemize the cost of restoring the property to its condition immediately before the casualty; it is limited to losses of $20,000 or less. The de minimis method uses a written good-faith estimate of repair cost and is limited to losses of $5,000 or less. These safe harbors, set out in Revenue Procedure 2018-08 (opens an external site), cover only a house that the owner occupies in full. They are not available if any part of the house is rented out or used as a home office, or for a co-op or condominium unit. For a federally declared disaster there is also a contractor safe harbor method, which uses the price in a signed, binding contract with an independent licensed contractor that itemizes the cost of restoring the property to its condition before the disaster, with no dollar limit.

The cost of repairs is not itself the casualty loss, but it can serve as a measure of the decrease in value when the repairs are actually made, are necessary to restore the property, are not excessive, address only the damage and do not leave the property more valuable than before. Whether a safe harbor applies, and which one, is for your CPA to decide.

Rebuilding is often the right time to improve a basement or kitchen: raised outlets, moisture-resistant drywall, vinyl plank flooring, a backwater valve or a larger electrical service. Those upgrades go beyond restoring prior condition. They are generally improvements rather than repair of the casualty, and both the insurer and your CPA treat them differently from the restoration work.

We document the scope from the first day, keep emergency mitigation, restoration and upgrades on separate invoice lines, and provide dated photo logs and moisture readings with the estimate. Electrical and plumbing repairs are performed with our licensed partner trades, under permit where required. For tax questions, consult your CPA.