Motion sensors and glass-break detectors can lower your homeowners insurance premiums—sometimes by 10–20%—while actually deterring burglaries and reducing false alarms. Insurance companies reward monitored security systems because they statistically reduce claims, meaning you pay less and sleep easier. Here's what homeowners need to know about qualifying for discounts and understanding which systems insurers actually recognize.
How Motion Sensors Earn You Insurance Discounts
Most major insurers (State Farm, Allstate, Progressive, Nationwide) offer rate reductions when you install a professionally monitored intrusion detection system that includes motion sensors. The discount typically ranges from 5% to 20% of your annual premium, with larger discounts for systems connected to 24/7 professional monitoring.
The key threshold: your system must be professionally monitored. A motion sensor sitting in your home with no monitoring service rarely qualifies. When an alarm trips, a monitoring center dispatches police, and that documented response history is what insurers value.
What Insurers Actually Require
Different carriers have different standards, so always confirm with your provider before buying. Here are the baseline requirements most insurers expect:
- UL or ULC certification – Your motion sensor must be listed by Underwriters Laboratories or ULC (Underwriters' Laboratories of Canada). This certifies the device meets industry performance and reliability standards.
- Hardwired or supervised wireless – Motion sensors need to report status regularly to the control panel, not just trigger alarms. Wireless sensors must use supervised channels (encrypted, two-way communication) to prevent jamming.
- Professional monitoring contract – A signed agreement with an alarm company showing 24/7 monitoring, dispatch capability, and proof of alarm response.
- System type – Most insurers prefer perimeter sensors (door/window contacts, glass break detectors) plus interior motion detection. Passive infrared (PIR) motion sensors are the standard technology and widely accepted.
Call your insurance agent and ask for their "alarm system discount requirements" document. This saves guesswork and ensures your purchase qualifies.
Typical Cost Ranges for Monitored Systems
Professional installation of a monitored system with motion sensors typically costs:
- Initial equipment & installation: $800–$2,500 (depends on home size and number of sensors)
- Monthly monitoring fee: $25–$50 (24/7 professional dispatch)
- Annual hardware cost recovery: Usually recouped within 5–8 years through insurance discounts alone
For example, if your homeowners insurance is $1,200/year and you get a 15% discount ($180/year), that's $1,080 in annual savings. Minus $40/month monitoring ($480/year), you net $600/year in savings. A $1,500 system pays for itself in about 2.5 years.
Motion Sensor Types That Insurers Accept
Not all motion sensors work the same way. Here's what matters:
Passive Infrared (PIR) – Detects heat signatures from people and pets. Most common, reliable, and universally accepted by insurers. Look for sensors rated for your pet weight if you have dogs or cats.
Dual-technology (PIR + microwave) – Requires both heat and movement for alarm trigger, reducing false alarms from wind or falling objects. Higher cost but preferred by some insurers if you have many false alarm triggers.
Glass break detectors – Acoustic sensors that detect the frequency of breaking glass. Often bundled with motion sensors in monitored systems and boost discount eligibility.
Avoid stand-alone, unmonitored motion sensors—they won't qualify for insurance discounts.
Steps to Get Your Discount
- Contact your insurer – Ask about alarm discount eligibility and requirements
- Get quotes from at least 2–3 alarm monitoring companies (Mercoly helps you compare and find trusted Intrusion & Motion Sensors providers in one place)
- Request UL/ULC certification confirmation – Ensure the company can provide proof
- Sign monitoring contract – Non-negotiable for the discount
- Get proof of monitoring – Ask for a certificate from the alarm company
- Submit to your insurer – Send proof of system installation and active monitoring
- Verify discount application – Confirm the reduction shows on your next bill
Allow 2–4 weeks for the discount to appear after submission.
Frequently Asked Questions
Q: Will my homeowners insurance accept a DIY motion sensor system I install myself? No. DIY systems without professional monitoring rarely qualify for insurance discounts. Insurers specifically require a signed monitoring contract and dispatch documentation.
Q: How many motion sensors do I need for an insurance discount? Most insurers don't specify a minimum number, but a typical system includes perimeter sensors (doors/windows) plus 1–2 interior motion sensors for main living areas. Confirm with your insurer's requirements.
Q: Do I need motion sensors if I already have door and window contacts? Contacts alone often qualify for small discounts (5%), but adding motion sensors typically unlocks the larger discount (10–20%) because they detect intruders already inside.
Start by calling your insurance company today to confirm their specific requirements, then compare systems that meet those standards.