Common Xactimate Estimating Errors: How Insurance Companies Underpay Through the Estimate

When your insurance company sends you an estimate for your property damage claim, that estimate was almost certainly prepared in Xactimate — the industry-standard estimating software. The number on that estimate is not a take-it-or-leave-it offer. It is one person's interpretation of what your repairs should cost, built line by line in a software program that has thousands of options and rules. And that interpretation frequently contains errors.

Some of these errors are honest mistakes — the adjuster was rushed, undertrained, or simply missed something. Others are systematic: company guidelines that instruct adjusters to exclude certain items, use lower-grade materials, or apply depreciation in ways that do not reflect reality. Either way, the result is the same: you get paid less than what your repairs actually cost.

This article covers the most common categories of Xactimate errors that lead to underpayment. Understanding these errors is the first step toward getting a fair settlement. You do not need to be an Xactimate expert to identify many of them — you just need to know what to look for.

Common Line Item Omissions

The most straightforward type of error is simply leaving things out. Xactimate has thousands of individual line items, and every item that exists in your home and needs to be removed, protected, or replaced must appear in the estimate. When items are missing, you are not getting paid for that work.

Detach and Reset Items

“Detach and reset” (D&R) refers to items that must be carefully removed before repair work can happen, then reinstalled afterward. These are some of the most commonly omitted line items in Xactimate estimates. Examples include:

• Electrical fixtures— outlet covers, switch plates, light fixtures, ceiling fans, and smoke detectors that must be removed before drywall or painting work
• Plumbing fixtures— toilets, faucets, supply lines, and angle stops that must be disconnected and reconnected during floor or wall work
• Window coverings— blinds, shutters, and curtain rods that must come down before window or wall work
• Appliances— stoves, dishwashers, and refrigerators that must be moved for floor or cabinet work
• Hardware— towel bars, toilet paper holders, door stops, house numbers, and mailboxes
• Base shoe and trim— quarter-round molding at the base of cabinets that must be removed and replaced when flooring is done

Each of these is a separate line item in Xactimate. An adjuster who writes “paint bedroom” without including D&R for the light fixtures, outlet covers, and window coverings in that room has produced an incomplete estimate. The painter still has to do that work — it just is not being paid for.

Temporary Protection

During construction, areas that are not being worked on must be protected from damage. Xactimate includes line items for:

• Floor protection— Ram Board, builder's paper, or plastic sheeting to protect finished floors from foot traffic, paint drips, and debris
• Furniture protection— plastic sheeting over furniture that cannot be moved out of the work area
• Dust barriers— poly sheeting and zipper doors to contain dust during demolition and reconstruction
• Carpet protection— adhesive-backed film specifically for protecting carpet in traffic areas adjacent to the work zone

These items are standard construction practice. Any contractor performing the work would protect adjacent finished surfaces. But many insurance estimates leave them out entirely, as if the crew will somehow avoid damaging the rest of the house during demolition and reconstruction.

Content Manipulation

Content manipulation refers to the labor required to move the homeowner's belongings out of the way before construction begins and move them back when construction is complete. This includes:

• Move out— moving furniture and contents from the affected area to a safe location (another room, garage, or storage pod)
• Move back— returning all contents to their original positions after repairs are complete
• Storage— when contents cannot remain in the home during repairs, portable storage units or offsite storage costs

Xactimate calculates content manipulation based on the square footage of affected rooms and a per-room time factor. It is legitimate construction overhead — contractors do not simply work around your couch. Many insurance estimates either omit content manipulation entirely or include it for only some of the affected rooms.

Cleaning During and After Construction

Construction generates dust, debris, and mess. Xactimate includes specific line items for construction cleaning:

• Progressive clean— ongoing cleaning during the construction process to maintain a livable environment
• Final clean— deep cleaning at the completion of all work to return the home to a presentable condition
• HEPA vacuuming— required when drywall dust or other fine particulates are generated, especially in occupied homes

A contractor performing the repair will clean the site. That cleaning has a cost. If the estimate does not include it, that cost is coming out of the money allocated for actual repairs.

Incorrect Measurements and Waste Factors

Even when the right line items are included, the quantities can be wrong. Measurement errors and incorrect waste factors are among the most impactful errors because they affect every material and labor line item in the affected area.

Net vs. Gross Measurements

When measuring a wall for drywall or paint, should you deduct the area of windows and doors? It depends. Xactimate has specific rules about when to measure “net” (subtracting openings) versus “gross” (measuring the full wall). The general principle is:

• For drywall and paint, Xactimate typically uses the full wall area without deducting for standard-size windows and doors, because the labor to cut around openings takes as much time as covering a flat expanse
• For siding and exterior finishes, the calculation method depends on the size of the opening relative to the wall area
• For flooring, the measurements should reflect the actual footprint of the room, but waste factor must still be added on top

An adjuster who deducts every window and door opening from the wall area is reducing the square footage being paid for — but not reducing the actual work required. This is a measurement methodology error that results in underpayment.

Incorrect Waste Factors

A waste factor accounts for the material that is lost during installation due to cutting, breakage, starter courses, and pattern matching. Every type of material has an expected waste factor, and more complex installations require higher waste factors. Common errors include:

• Roofing on complex roofs— a simple gable roof might have 5-10% waste, while a hip roof with valleys and dormers can require 15-20% or more. Adjusters frequently apply a flat 10% waste factor regardless of roof complexity
• Tile flooring— diagonal installations, large-format tile in small rooms, and natural stone all generate more waste than standard square-lay ceramic in large rooms
• Hardwood flooring— random-length planks in rooms with many angles, closets, and transitions generate higher waste than the same product in a simple rectangular room
• Siding— walls with many windows, corners, and architectural features create more cut pieces and more waste

When the waste factor is too low, the estimate does not include enough material to complete the job. The homeowner either pays the difference out of pocket or the contractor cuts corners to stay within budget.

Incorrect Perimeter Calculations

Baseboard, crown molding, chair rail, and other linear trim items are measured by the linear foot. The perimeter of a room determines how much trim is needed. Common errors include:

• Not including closet perimeters — closets have baseboard too
• Not accounting for islands, peninsulas, and knee walls in kitchens
• Using a simplified room outline that does not reflect alcoves, bump-outs, or irregular shapes
• Deducting door openings from baseboard measurements when baseboard actually returns into the door casing on both sides

Wrong Labor Rates and Minimums

Xactimate uses a complex labor pricing system. Each line item has a built-in labor component based on industry-standard production rates. But the way those labor rates are applied can vary, and errors here result in underpayment for the actual work involved.

Minimum Charge vs. Standard Rate

Many line items in Xactimate have a “minimum charge” — the least amount that will be paid for that type of work, regardless of quantity. For example, a painter may have a two-hour minimum. If a room takes 1.5 hours to paint, the painter still charges the two-hour minimum because they cannot use that half hour on another job.

The error occurs when an adjuster applies the minimum charge on a job that clearly exceeds the minimum threshold. If a claim involves painting six rooms, the “minimum” rate is irrelevant — the standard production rate applies. Conversely, on small jobs, the minimum charge should apply but is sometimes omitted entirely.

Incorrect Labor Minimums

Each trade has a minimum charge for showing up to the job. An electrician, a plumber, and a painter each have a minimum service call fee. Xactimate accounts for this through labor minimums on individual line items and through the overall trade minimum. Errors occur when:

• The estimate has a very small quantity of a particular trade's work but does not apply the labor minimum — resulting in a payout that would not cover the tradesperson's minimum service call
• The adjuster manually overrides the labor minimum downward without justification
• Multiple small jobs for the same trade across different rooms are combined to avoid triggering separate labor minimums, when in reality they require separate site visits

Labor Productivity Rate Adjustments

Xactimate's base labor rates assume standard working conditions. But real-world conditions often slow production: working at heights, working in confined spaces, working in occupied homes, or working with hazardous materials all require more time. Xactimate has line items and modifiers for these situations, but adjusters frequently fail to include them. A painter working on a 20-foot cathedral ceiling is not working at the same production rate as a painter working on an 8-foot flat ceiling, but the estimate may price them identically.

Missing Overhead & Profit

Overhead and profit (O&P) is a 20% charge (10% overhead + 10% profit) that represents the general contractor's fee for managing the repair project. It is one of the most commonly disputed elements in insurance estimates, and its omission represents one of the largest single-item underpayments.

O&P should be included whenever the repair requires coordination of multiple trades. If a claim involves demolition, drywall, texture, paint, flooring, and trim — as most significant water damage claims do — someone must manage those trades. That is what a general contractor does, and their overhead and profit are legitimate costs of repair.

Common situations where O&P is improperly excluded:

• Claims involving three or more trades — the widely accepted industry threshold for including O&P
• Claims where the insurer's own estimate lists work across multiple trade categories, yet does not include O&P
• Roof claims that require coordination between roofers, carpenters (fascia/soffit), painters, and gutter installers
• Fire claims where virtually every trade is involved and O&P is clearly warranted

Wrong Material Selections

Xactimate has line items for a range of material qualities: builder-grade, standard, premium, and custom. The estimate should reflect what was actually in your home, not the cheapest available option. Common material selection errors include:

• Flooring— using a line item for basic laminate when the home had engineered hardwood, or using standard-grade carpet when the home had premium nylon fiber
• Cabinets— using economy or builder-grade cabinet line items when the home had semi-custom or custom cabinetry with specialty finishes
• Countertops— using laminate pricing when the home had granite, quartz, or solid surface material
• Fixtures— using standard-grade light fixtures, faucets, and hardware when the home had premium or designer selections
• Paint— using standard two-coat latex when the home had specialty finishes, Venetian plaster, or multi-step decorative treatments
• Roofing— using three-tab shingle pricing when the home had architectural/dimensional shingles, or using standard composition when the home had tile or metal roofing
• Windows— using single-pane or builder-grade vinyl when the home had dual-pane, low-E, or wood-frame windows
• Doors— using hollow-core interior door pricing when the home had solid-core or solid wood doors

Your policy entitles you to repair or replacement with materials of “like kind and quality.” That means what you had before the loss, not the cheapest available substitute. If your home had 3/4-inch solid hardwood floors, the estimate should not include 8mm laminate just because it looks similar. They are different products at different price points, and the estimate must reflect what was actually there.

Incorrect Depreciation

When an insurance company issues an actual cash value (ACV) payment, they deduct depreciation from the replacement cost to account for the age and condition of the damaged items. Depreciation errors are extremely common and can represent thousands of dollars in improper withholding. The most frequent errors include:

Depreciating Labor (Illegal in California)

In California, labor cannot be depreciated. The cost to install a new roof is the cost to install a new roof — it does not matter how old the previous roof was. Labor does not “wear out.” Despite this, many insurance company estimates apply depreciation to the total replacement cost including labor. The correct method is to depreciate only the materials and apply the labor cost at full value.

This error is particularly significant on labor-intensive repairs. On a roof claim where labor is 60% of the cost, improperly depreciating labor means the initial ACV payment is dramatically lower than it should be.

Wrong Useful Life Estimates

Depreciation is based on an item's expected useful life. If a roof has a 30-year expected life and is 15 years old, it might be depreciated 50%. But what if the insurer uses a 20-year useful life instead? Now that same roof is depreciated 75%. Common errors include:

• Using unrealistically short useful-life tables that do not reflect how long materials actually last in the field
• Not accounting for maintenance that extends useful life — a well-maintained roof lasts longer than a neglected one
• Applying the same depreciation percentage to every component regardless of actual condition — some items age faster than others
• Depreciating beyond actual condition — if a 20-year roof is in excellent condition at 15 years, depreciating it 75% does not reflect reality

Depreciating Items That Should Not Be Depreciated

Certain items and costs should never be depreciated because they do not “wear out” over time:

• Labor— as noted above, illegal to depreciate in California and inappropriate in many other states
• Permits— the cost of a building permit does not depreciate
• Code upgrades— bringing systems up to current code is a fixed cost unrelated to the age of the existing system
• Overhead and profit— the GC's management fee does not depreciate
• Debris removal and haul-off— the cost to dispose of damaged materials is the same regardless of their age
• Concrete and masonry— properly maintained concrete has an extremely long useful life and should be depreciated minimally if at all

Missing Trades

A complete repair requires every affected trade to be represented in the estimate. Adjusters sometimes scope only the most obvious trades and miss the supporting work. Common missing trades include:

• Electrician— when walls are opened for drywall repair, any electrical running through those walls may need to be addressed. Outlet boxes, wiring, and connections disturbed during demo need an electrician to make them safe and code-compliant
• Plumber— water damage claims often require plumbing work beyond the initial repair of the leak. Supply lines, drain lines, and fixtures in affected areas may all need attention
• HVAC technician— when ductwork runs through affected areas, it often needs cleaning, repair, or replacement. Registers and grilles that were removed need to be reinstalled
• Insulation contractor— when walls or ceilings are opened, insulation is disturbed or removed. It must be replaced before the walls are closed back up
• Low-voltage technician— network cabling, phone lines, security system wiring, and speaker wire all require a specialized technician
• Stucco/exterior specialist— when interior work requires access through exterior walls, the exterior finish must be restored by someone qualified in that specific material
• Cabinetmaker— custom or semi-custom cabinets cannot be purchased off the shelf; they require fabrication by a specialist

Missing trades is also significant for the overhead and profit discussion. Each additional trade that should be in the estimate strengthens the argument for O&P — more trades means more coordination, which means a GC is clearly needed.

Sketch Errors

Xactimate uses a sketch module to draw the floor plan or roof layout of the property. The sketch drives the measurements for many line items — wall area, floor area, ceiling area, and perimeter are all calculated from the sketch. When the sketch is wrong, every line item tied to it is wrong.

Incomplete Sketches

The most common sketch error is simply not including all affected areas. If water damage affected the kitchen, hallway, and two bedrooms, but the sketch only includes the kitchen and one bedroom, the estimate will miss significant square footage. This often happens when:

• The adjuster did not physically enter every affected room or did not take measurements in all of them
• Secondary damage areas (like water that migrated to an adjacent room) were not identified during the inspection
• Closets, pantries, and utility rooms within affected areas were not included as separate sketch elements

Wrong Ceiling Heights

Xactimate defaults to a standard 8-foot ceiling height. Many homes have 9-foot, 10-foot, or vaulted ceilings. When the ceiling height is wrong in the sketch, the wall area calculation is wrong, which means drywall quantities, paint quantities, and baseboard calculations are all affected. A room with 10-foot ceilings has 25% more wall area than the same room with 8-foot ceilings.

Missing Rooms and Spaces

Walk-in closets, utility rooms, half-baths, nooks, bump-outs, and alcoves are all separate spaces with their own walls, floors, and ceilings. If the sketch lumps a walk-in closet into the bedroom measurement, the closet's perimeter (for baseboard) and wall area (for paint) are not being accurately captured. Each distinct space should be its own room in the sketch.

Roof Sketch Errors

Roof sketches in Xactimate must accurately reflect the pitch, valleys, hips, ridges, and any penetrations (vents, skylights, chimneys). Common errors include:

• Incorrect roof pitch — using a 4/12 pitch when the actual roof is 8/12 results in significantly less calculated area (steeper roofs have more surface area)
• Missing roof facets — dormers, gables, and lower sections that were damaged but not included in the sketch
• Missing ridge and hip lengths — these drive the quantities for ridge cap materials, which are a separate line item from field shingles

Pricing Database Issues

Xactimate's pricing is localized by zip code. Prices in San Francisco are different from prices in rural Kansas. The pricing database is updated regularly by Verisk, but there are several ways that pricing errors can creep into an estimate.

Wrong Zip Code or Price List

If the adjuster builds the estimate using the wrong zip code, every price in the estimate will be wrong. This sometimes happens when:

• The adjuster works remotely and selects the wrong location
• The property is in a high-cost area but the adjuster uses a neighboring, lower-cost zip code
• The insurer uses a regional price list that does not reflect local conditions in your specific market

You can verify the price list by checking the first page of the Xactimate estimate, which should display the “Price List” and the zip code or region used. It should match the actual location of your property.

Outdated Pricing

Xactimate's prices are updated monthly. If the estimate was written using an older price list, the prices may not reflect current material and labor costs. This is particularly impactful during periods of rapid price increases (such as after hurricanes or during supply chain disruptions). The price list date should correspond to the date of loss or the date of repair, not a date months or years earlier.

Wrong State

This is rarer but it happens, particularly with catastrophe (CAT) adjusters who handle claims in multiple states. If an adjuster who normally works in Texas is deployed to California for a wildfire, they may inadvertently use their default state's price list. California prices are significantly higher than Texas prices. Always verify the state and zip code on the price list page.

How to Identify These Errors

You do not need to be an Xactimate expert to find many of these errors. Here is a systematic approach to reviewing an insurance estimate:

Step 1: Check the Basics

• Price list— check the first page for the correct zip code, state, and a price list date that is current to your date of loss
• Overhead and profit— if your claim involves multiple trades, check whether O&P is included. It is usually shown at the bottom of the estimate as a separate percentage
• Depreciation method— if you are in California, verify that depreciation is applied only to materials, not to the combined total

Step 2: Compare the Sketch to Your Home

• Does the sketch include every room that was damaged?
• Are closets and secondary spaces shown separately?
• Do the room dimensions look reasonable compared to what you know about your home?
• Is the ceiling height noted correctly? (Check the room properties in the estimate)
• For roof claims, does the sketch show all roof facets, dormers, and slopes?

Step 3: Walk Through the Line Items

• Look at the material descriptions — do they match what you actually have? If your estimate says “laminate countertop” and you have granite, that is a material selection error
• Look for detach/reset items — if the estimate includes painting a room, there should be D&R items for the fixtures in that room
• Look for content manipulation — if rooms are being reconstructed, there should be a line item for moving contents
• Count the trades — if you see three or more different types of work (electrical, plumbing, drywall, paint, flooring, etc.) there should be O&P
• Check for temporary protection — any construction project near finished surfaces needs floor protection, dust barriers, or both

Step 4: Check Depreciation Line by Line

• Is depreciation applied to labor separately from materials?
• Are the useful-life assumptions reasonable for each item?
• Is depreciation being applied to items that should not be depreciated (permits, code upgrades, debris removal)?
• Does the depreciation percentage seem appropriate for the actual age and condition of the items?

What to Do When You Find Errors

Finding errors in your estimate is step one. Getting them corrected is step two. The process for addressing errors is called “supplementing” the claim.

The Supplement Process

A supplement is a formal request to revise the estimate. It is not a complaint or a dispute — it is a standard part of the claims process. Supplements happen on virtually every significant claim because it is impossible to identify every needed repair on the initial inspection. Here is how it works:

1. Document the errors— create a list of each error or omission you have identified. Be specific: “missing D&R for toilet in master bath” is better than “things are missing”
2. Provide supporting evidence— photographs showing what is actually in the home (material types, fixtures, conditions), measurements you have taken, or contractor invoices that reflect the actual cost
3. Submit to the adjuster— send your supplement request in writing (email) to the assigned adjuster. Keep a copy for your records
4. Follow up— if you do not receive a response within 15 days (in California) or the timeframe required by your state, follow up in writing and reference your original submission date
5. Escalate if needed— if legitimate errors are not being corrected, you have options including requesting a supervisor review, hiring a public adjuster, invoking the appraisal clause, or filing a complaint with your state's department of insurance

Writing an Effective Supplement Request

The most effective supplement requests are specific, factual, and referenced to Xactimate's own line items and pricing methodology. Instead of saying “your estimate is too low,” point to specific line items:

• “The estimate uses line item XYZ for standard-grade laminate flooring. The home has engineered hardwood flooring (see attached photo). The correct line item is ABC.”
• “The estimate does not include detach and reset for the three toilets in rooms where flooring is being replaced. Attached are photos showing toilets in the master bath, hall bath, and powder room that must be removed for the flooring work.”
• “The estimate applies a 10% waste factor to a complex hip roof with valleys and dormers. Industry standard for this roof geometry is 15-20%. See attached aerial image showing roof complexity.”

When to Hire a Professional

Some errors are straightforward enough for a homeowner to identify and dispute. Others require professional expertise. Consider hiring a licensed public adjuster or an independent Xactimate estimator when:

• The claim is large (over $20,000-$30,000) and the potential for error is significant
• The insurer is refusing to correct documented errors
• You do not have the time or expertise to line-item the estimate yourself
• The damage involves complex trades, code issues, or specialty materials
• You need a competing Xactimate estimate prepared in the same software using the same methodology — which levels the playing field

Honest Mistakes vs. Systematic Underpayment

Not every error in an insurance estimate is intentional. It is important to understand the difference between a genuine mistake and a pattern of systematic underpayment, both for your own perspective and for how you choose to respond.

Signs of an Honest Mistake

• The adjuster willingly corrects the error when you point it out
• The errors are random — some things are over-estimated, some under-estimated
• The adjuster acknowledges they missed something or measured incorrectly
• The scope of the error is relatively small compared to the overall estimate
• The adjuster was clearly rushing (large catastrophe event, heavy caseload) but is responsive to corrections

Signs of Systematic Underpayment

• The same types of items are consistently excluded across the entire estimate — for example, no D&R items anywhere, no content manipulation anywhere, no temporary protection anywhere
• O&P is excluded despite clear multi-trade involvement
• Every material selection defaults to the cheapest available option regardless of what is actually in the home
• The adjuster refuses to correct documented errors or gives circular reasons for the exclusions
• Depreciation is applied aggressively to items that should not be depreciated or using unrealistically short useful-life tables
• The insurer cites “company guidelines” as justification for excluding standard costs
• The waste factor is uniformly low regardless of actual installation conditions

Why the Distinction Matters

If the errors are honest mistakes, a polite supplement request will usually resolve them. The adjuster corrects the estimate, you receive additional payment, and the claim moves forward. There is no need to escalate.

If the errors are systematic — reflecting company policy rather than individual oversight — a simple supplement request may not be enough. The adjuster may lack authority to override company guidelines, even when those guidelines produce an incomplete estimate. In this situation, you may need to escalate: request a supervisor review, hire a public adjuster, invoke appraisal, or file a department of insurance complaint. The approach is different because the problem is different.

Summary: The Most Impactful Errors

While every error matters, some have a disproportionate impact on the total estimate. If you are reviewing your insurance estimate and have limited time, focus on these high-impact areas first:

1. Missing overhead and profit— this is typically 20% of the entire estimate. If it should be there and it is not, that is the single largest error in dollar terms
2. Incorrect depreciation— especially depreciating labor in California or using unrealistically short useful lives. This directly reduces your initial payment
3. Wrong material selections— the difference between builder-grade and premium materials can be substantial, especially on large-quantity items like flooring, cabinets, and roofing
4. Sketch errors and wrong measurements— these affect every line item in the affected rooms. A missing room or wrong ceiling height has a multiplier effect across all trades
5. Wrong waste factor— particularly on roofing claims where the difference between 10% and 20% waste on a large roof is significant
6. Missing trades— an entire category of work that is not represented means all the labor and materials for that trade are unpaid
7. Missing detach/reset items— individually small, but they add up across an entire scope of work and their absence also suggests the estimate was prepared carelessly

An insurance estimate is not a final verdict. It is a starting point. When it contains errors — whether through oversight or design — you have every right to identify those errors and request corrections. The supplement process exists for exactly this purpose. The more specific and documented your request, the more likely it is to result in additional payment.

For more information on related topics, see our guides on understanding Xactimate estimates, Xactimate line items, overhead and profit, roof waste factors, and commonly missed items.