The short answer
Sometimes, but the gap is usually small. A monitored alarm — one connected to an alarm receiving centre or sending alerts so a response can be triggered — can attract a slightly larger discount than a bells-only (audible-only) system on policies that credit alarms at all. The reason is that monitoring adds a response element rather than relying on a passer-by to act on the siren. However, many insurers offer little or no discount for either type, and where a reduction exists it is modest. Monitoring also brings ongoing costs: a monitoring contract and, for police response, a verified system meeting police URN policy. So the real comparison is between a small possible saving and the recurring cost and benefit of monitoring.
Bells-only and monitored alarms differ in how a break-in triggers a response. Insurers notice that difference, but the effect on a premium is usually smaller than the difference in running cost.
Monitored vs bells-only for insurance
- Bells-onlyAudible siren only
- MonitoredAlerts a centre or your phone
- Discount differenceUsually small
- Police responseNeeds verified system + URN
- Running costMonitoring adds a recurring fee
What 'monitored' and 'bells-only' mean
A bells-only alarm is an audible-only system: when triggered, it sounds an external siren and flashes the strobe, and that is the whole response. It relies on the noise deterring the intruder and on a neighbour or passer-by noticing and acting. A monitored alarm goes further — when triggered it sends a signal to an alarm receiving centre (ARC) or to your phone, so that a keyholder, the monitoring company or, in qualifying cases, the police can be alerted to respond.
Within monitoring there are further tiers. Some systems alert keyholders only; others use professional monitoring with keyholder response; and a smaller number qualify for police response, which depends on the system being properly verified and registered. Each step adds capability — and cost.
How insurers weigh the difference
Insurers generally view a monitored system as a stronger risk control than bells-only, because a response can be set in motion rather than depending on chance. On policies that give any alarm credit, that can translate into a slightly larger discount for monitored cover. But two important caveats apply.
- Many insurers give little or no discount for either type — the alarm is priced into the overall risk and the quote barely moves.
- Where a reduction exists, the extra saving for monitoring over bells-only is usually small, and may not cover the monitoring fee.
For high-value or higher-risk properties, an insurer may go further and require monitoring (or even police response) as a condition rather than simply rewarding it. In those cases the question is less about the discount and more about meeting a condition of cover.
| System | Response on activation | Typical insurance effect |
|---|---|---|
| Bells-only (audible) | Siren and strobe only | Small or no discount |
| Monitored — keyholder/ARC | Alerts centre or keyholders | Slightly larger discount where offered |
| Monitored — police response | Verified alert to police (URN) | May be required for high-risk cover |
Indicative comparison. Discounts vary widely by insurer and are often small; some give none. Confirm with your own insurer.
The running-cost trade-off
Monitoring is not a one-off purchase. A monitored system carries a recurring monitoring contract, and police-response monitoring also requires the alarm to meet the police's Unique Reference Number (URN) policy: the system must be a confirmed/verified alarm installed and maintained by an approved company, and persistent false alarms can lead to police response being withdrawn. So the monitoring tier you choose affects both the ongoing cost and the level of response you actually get.
Set against that, the insurance saving alone rarely justifies stepping up from bells-only to monitored. The stronger reasons to monitor are the faster response and added security, particularly for a property that is often empty, holds valuables, or sits in a higher-risk area. If an insurer requires monitoring, the cost is simply part of holding the cover. If it is optional, weigh the monitoring fee against the genuine security benefit rather than against a small premium reduction.
Choosing between the two
For many homes, a well-installed bells-only alarm is a solid deterrent and may be all the insurer expects. Stepping up to monitoring makes most sense when you want a response triggered even if no one is nearby — for example, a property left empty during the day, a home with significant valuables, or one where the insurer makes monitoring a condition.
If insurance cost is part of your decision, ask your insurer two specific questions before buying: whether they offer any discount for a monitored system over bells-only, and whether your contents or location would make monitoring a requirement rather than a choice. Treat any quoted discount as indicative, and compare it honestly with the monitoring fee.
There is a middle path worth knowing about: self-monitored systems that send an alert to your own phone via an app, with no professional receiving centre and no recurring fee. These give you some of the response benefit of monitoring without the contract, but insurers generally treat them like bells-only rather than professionally monitored cover, because there is no verified third-party response and no URN. If a discount or a condition specifically references monitoring, a self-monitored app alert usually will not satisfy it. Because insurer criteria and police URN policy both change over time, confirm the current position with your insurer and your chosen approved installer rather than relying on general figures.
It is also worth thinking about how each option behaves when you are away from home for a long period, since that is when the difference really shows. A bells-only system can sound for its permitted time and then fall silent with no further action, whereas a professionally monitored system can summon a keyholder or, where qualifying, the police even if you are abroad and unreachable. For a main residence that is rarely empty, that gap may not justify the monitoring fee; for a second home, a let property or a house holding specified valuables, the same gap can be the deciding factor. Matching the tier of response to how often the property is actually left unattended tends to be a more useful test than chasing the small premium difference between the two.
Frequently asked questions
Will a monitored alarm always save more than bells-only?
Not always. A monitored system can attract a slightly larger discount where an insurer gives alarm credit, but many give little or none, and the extra saving over bells-only is usually small — often less than the monitoring fee.
Do I need police response for the discount?
Usually no. Most discounts, where offered, relate to having a maintained, approved alarm rather than police response specifically. Police response requires a verified system with a Unique Reference Number and may be a requirement only for higher-risk cover.
Is monitoring worth it just for insurance?
Rarely on the saving alone. The stronger reasons are a faster response and added security, especially for properties often left empty or holding valuables. If an insurer requires monitoring, the cost is part of holding the cover.
Sources & further reading
- Secured by Design — alarm and security systems guidance
- Association of British Insurers (ABI) — home insurance guidance
- Which? — home security and alarms advice
Figures on this page are typical UK ranges drawn from published sources and depend on your specific property and system. They are guidance, not a quotation.