£2,000 Over 3 Years. You Own Nothing.

ADT uses multi-year monitoring contracts with early termination fees of approximately 75% of the remaining balance. Customers frequently say they did not fully understand the commitment at sign-up, especially when equipment is financed through the contract. The contract auto-renews unless you cancel within a narrow notice window - miss it and you are locked in for another year.

Cancellation is described as deliberately difficult: complex procedures, pushback from retention teams, and processes that conveniently stall when contracts are close to auto-renewal. Thousands of BBB complaints describe the same cycle - trying to leave and being told you cannot.

Common complaints include improper or unexpected charges, continued billing after cancellation, and difficulty getting refunds or correcting errors. Trustpilot reviewers describe direct debits continuing months after they believed they had cancelled, with no acknowledgement from ADT that the account was closed.

The equipment itself is not yours. ADT retains ownership of the main control panel and communication module. When you finally do cancel, they reclaim the equipment or disable it remotely - leaving you with a dead box on the wall, drill holes, and an ADT-branded bellbox they will not promptly remove but you cannot legally use.

Users complain about alarms not triggering during actual break-ins, slow or missing monitoring responses, and sensors or cameras that fail at the critical moment. Repeated equipment faults and engineers who cannot diagnose or fix problems undermine confidence in the system as a real security upgrade.

Even when the alarm does trigger, UK police forces largely do not respond to unverified intruder alarms. The monitoring centre calls you. If you do not answer, they call the next keyholder. The response often ends there. Police respond to evidence - CCTV footage of a person at your property. Not a siren. Not a phone call from a monitoring centre.

ADT's plans and hardware are less flexible than modern alternatives. Video and smart features sit behind additional paywalls. The system is tightly tied to ADT's monitoring and app - switching provider or mixing third-party devices is much harder than with open, modular setups. You are not just paying for monitoring, you are paying for a walled garden you cannot leave without starting over.

Many ADT systems still communicate via traditional phone lines (PSTN). The UK is switching off the PSTN network by 2027. ADT systems using phone line communication will become incompatible - and customers report being told they need to pay for an upgrade. For how hardwired PoE systems avoid all of these issues: PoE vs Wi-Fi comparison.

In 2021, ADT's US operation paid a £750,000 settlement after a technician was found to have accessed customers' home security cameras to spy on them for over 4 years. While that was the US arm, it is the same brand asking you to trust them with cameras inside your home. ADT UK has also faced Trading Standards complaints over sales practices and ICO complaints about unsolicited marketing.

The company has changed hands multiple times - Tyco, Johnson Controls, then sold to Securitas in 2021. During these transitions, customers report service quality drops and confusion over who their contract is actually with. With a local CCTV system, your footage stays on a hard drive inside your property. No cloud. No third party. No one to spy on you.