What to Do When a Contractor Invoice Is Higher Than the Original Quote

Differences often come from one of these:

Approved changes

Work added after the quote was accepted.

Quantity changes

More material, more square footage, or more units than originally estimated.

Allowance adjustments

A selection that cost more than the allowance amount in the quote.

Conditions discovered on site

Issues found once work began, such as damage behind a wall.

Excluded work now included

Something the quote explicitly excluded that was later performed.

Billing structure

Taxes, fees, or a milestone structure presented differently from the quote.

Work item by item rather than total to total.

For each invoice line, determine whether it:

• matches an item in the accepted quote
• matches an approved change order
• reflects a changed quantity or price
• does not appear in either document

Most of the time, a small number of lines explains the entire difference. Once those are identified, the conversation becomes specific.

Referencing the documents directly keeps the discussion factual and usually produces a faster answer.

“The accepted quote lists the tile installation at one quantity, and this invoice shows a larger quantity. Could you confirm what changed and whether it was documented?”

If an item still cannot be explained, it helps to:

• keep your questions and any answers in writing
• note which specific lines remain unclear
• keep the accepted quote, change orders and invoices together
• record what you have already paid

Organized records make any later conversation easier, whether that conversation is with your contractor or with someone advising you.