Yes, security and guard services are subject to sales tax in New York. The state specifically taxes protective and detective services, which includes security guards, patrol services, alarm monitoring, private investigations, and related protective work. If you run a security business on Long Island, you need to collect sales tax from your customers and remit it to New York State.

The tax applies to the full charge for your services. When you invoice a client for guard services at their warehouse or monitoring for their office building, you add the applicable sales tax rate to that invoice. In Nassau and Suffolk counties, the combined state and local rate runs above 8%, so the amounts get significant quickly on larger contracts.

Some service business owners assume they don’t need to collect sales tax because they’re not selling physical products. That assumption causes problems when NYS catches up. Security services fall into a defined category of taxable services alongside information services and certain maintenance contracts. Not every service in New York is taxable, but protective services are.

Before you start collecting, you need to register with New York State and obtain a Certificate of Authority through the Tax Department. Once registered, you’ll file sales tax returns on a schedule based on your volume. Smaller operations typically file quarterly while higher-volume businesses file monthly.

From a bookkeeping perspective, tracking sales tax correctly matters more for security businesses than many other service types. The tax you collect from customers is not your revenue. It’s money held in trust for the state. Your books should show sales tax collected as a liability that increases when you bill customers and decreases when you remit to NYS. If that account doesn’t balance out after each payment, something needs investigation.

For facility services companies that offer security alongside other work like building maintenance, tracking gets more involved. You might have some services that are taxable and others that aren’t, which means your invoicing needs to break out the taxable portions clearly.

Getting sales tax wrong leads to penalties and interest that eat into your margins. Getting it right from the start with proper small business bookkeeping on Long Island means you always know exactly what you owe and when it’s due.