Yes, that’s the general rule. In New York, roof repairs are subject to sales tax while a full roof replacement can be tax-exempt when it qualifies as a capital improvement. The distinction matters for every roofing job, and getting it wrong creates liability for the contractor.

NY Tax Law defines a capital improvement as work that becomes a permanent part of real property and substantially adds to its value or prolongs its useful life. A complete roof replacement meets this definition. Patching a leak, replacing a few damaged shingles, or repairing flashing does not. Those are maintenance repairs that keep the existing roof functional, and they’re taxable.

The key document is Form ST-124, the Certificate of Capital Improvement. When a customer provides a properly completed ST-124 for a qualifying job, the contractor can perform the work without charging sales tax. Without that form on file, the contractor must collect tax regardless of what the work actually is.

This is where many roofers run into trouble. They assume a full replacement is automatically exempt and skip collecting tax without having the ST-124 in hand. If NY audits the business, every tax-exempt job lacking proper documentation becomes taxable. The contractor owes the uncollected tax plus penalties and interest, whether they collected from the customer or not.

NY Publication 862 spells out the repair-vs-capital-improvement distinction in detail. Some jobs fall into gray areas. Replacing an entire roof section might qualify, but replacing just the shingles while leaving the underlayment intact might not. When in doubt, collect the tax or get the form signed first.

The practical approach for home and property services businesses: keep blank ST-124 forms ready for every replacement job. Explain to customers that providing the form saves them the sales tax. If they won’t provide it, charge the tax. There’s no way around this.

From a bookkeeping standpoint, this means tracking which jobs were charged tax and which were exempt, plus retaining copies of every ST-124. Those forms need to stay on file for at least three years and be available if the state requests them during an audit.

Getting this right from the start is easier than fixing it later. Long Island bookkeeping services that work with roofers can help set up systems to track taxable vs exempt jobs correctly and keep the documentation organized. Clean records mean no surprises when NY comes asking questions.