Home Security System Cost Calculator

How much does a home security system cost?

A modern home security system in 2026 typically costs $300–$1,500 up front for equipment and installation, plus $20–$60 per month for professional monitoring. This free home security cost calculator turns those broad ranges into a personalized estimate based on the factors that actually move the price: your home's size, how many cameras you want, whether you add a video doorbell or smart locks, your monitoring choice, and whether you install it yourself or hire a professional.

The biggest swing factors are cameras (roughly $60–$160 each) and professional installation, which scales with the number of devices placed. Monitoring is the recurring cost — self-monitoring is nearly free but relies on you responding to alerts, while professional monitoring dispatches help 24/7. Use the estimate as a starting point for comparing quotes, and remember that a no-contract provider lets you adjust as your needs change. Nothing you enter here is stored or transmitted — the whole calculator runs privately in your browser.