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Switching Home Security Systems: What to Check Before You Leave

Switching home security providers is more straightforward than most people expect — but there are a handful of details worth getting right before you cancel. Missing a notice deadline, misunderstanding equipment ownership, or leaving a monitoring gap are the most common avoidable mistakes. This checklist covers them.

Direct answer: Before you switch, confirm: (1) your contract end date, (2) your required notice period and cancellation method, (3) your early termination fee if applicable, (4) who owns your current equipment, and (5) when your new system will be active. With all five confirmed, you can switch without surprises.

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Taylor Smith, founder and editor of SecurityCompassHQ

Taylor Smith — Founder & Editor

Nearly a decade in home security · Thousands of installations overseen · Built to cut through sales pressure

Reviews and comparisons on SecurityCompassHQ are produced by Taylor and the editorial team independently. No brand pays to influence a score or ranking. About the founder →

Step 1: Check your current contract

Pull out your original service agreement. If you do not have a copy, call your provider and ask them to send one. Look for these items specifically:

What to findWhere to lookWhat it tells you
Contract end dateService agreement / 'Term' sectionWhether you are in-contract or month-to-month. Switching in-contract without an ETF is only possible if the provider allows it.
Early termination feeCancellation / 'Early Termination' sectionThe financial cost of leaving before the contract ends. Often expressed as a percentage of remaining monthly fees.
Required notice periodCancellation procedure sectionHow many days notice you must give, and whether it must be in writing or via a specific method.
Auto-renewal clauseRenewal / 'Term' sectionWhether your contract auto-renews and what window you have to prevent it.
Equipment ownershipEquipment / 'Hardware' sectionWhether the equipment is yours outright, leased, or secured to the contract term.

Step 2: Understand your equipment situation

Equipment ownership varies significantly by provider type. Here is the general picture by category:

DIY systems — you own the hardware

SimpliSafe, Ring, Eufy, Wyze, Abode — you purchase the equipment directly. You can take it with you, resell it, or continue using it with a different monitoring service if compatible.

Professionally installed — check your agreement

ADT and Vivint install proprietary equipment. Ownership after the service term is typically the customer's, but equipment financed separately (Vivint) must be settled independently. Verify with your contract.

Older legacy systems

Older hardwired alarm systems may be compatible with third-party monitoring via a qualified technician. Ask a security dealer whether your panel can be reused before replacing everything.

Step 3: Plan the cutover to avoid a monitoring gap

A monitoring gap is the window between when your old system is deactivated and when your new system is fully active and monitored. This can be avoided with a simple timing plan.

Key takeaways

  • Activate your new system and confirm monitoring is live before canceling your old one — even one overlapping day of coverage is better than a gap
  • If switching to a DIY system, complete the setup and verify the monitoring connection before submitting your cancellation notice
  • For professionally installed systems, coordinate install dates with your old cancellation notice so you know the coverage handoff date
  • Keep your old system on and armed until you have confirmed the new system is actively monitored — test it with your new monitoring center directly
Quick verdict: One day of overlap is far less costly than one gap. If you are not sure both systems are fully active simultaneously, wait until you are.

Step 4: Cancel your old service correctly

Once your new system is confirmed active, cancel your old service following the correct procedure. Common pitfalls:

  • Use the required cancellation method. Phone cancellation may not be sufficient — some providers require written notice by certified mail or via an online portal. Check your contract.
  • Document the date of cancellation. Save a copy of your written notice and any confirmation you receive. This protects you if billing disputes arise.
  • Note the final billing date. Most providers bill through the end of the current period or the notice period, even if you cancel mid-month. Ask what your final charge will be.
  • Return leased equipment if required. Some providers (particularly older landline-based systems or leased setups) may require equipment return. Ask if this applies to your agreement.

Considering switching to? Start with the right reviews

Related reading: How to decode a home security quote — interpreting the risk categories and what to do next · How to compare a home security quote · How to validate what a rep told you · Quote Decoder — line-by-line · Best no-contract systems · Stuck in a contract? Your 5 options right now

Frequently asked questions

Can I keep my existing equipment when I switch security companies? +
It depends. DIY equipment you own outright (SimpliSafe, Ring, Eufy, Wyze) typically can be reused or sold. Equipment provided under a professionally installed service agreement may be owned by the company or tied to the contract — check your agreement.
What is an early termination fee and how is it calculated? +
An ETF is a penalty for canceling before your contract end date. The most common formula is 75% of remaining monthly fees. Example: a 36-month ADT contract at $49.99/month (Complete Pro Install) with 18 months remaining = 18 × $49.99 × 75% = approximately $675. With 24 months remaining at that same rate, the ETF would be approximately $900. Vivint's monitoring has no ETF — but if you financed equipment, the full remaining loan balance is owed regardless of monitoring status. Check your specific contract for the exact formula — some ETFs are a flat fee, others are percentage-based.
How much does it cost to cancel ADT early? +
ADT's professionally installed plans charge approximately 75% of the remaining contract balance as an early termination fee. Worked examples — April 2026 Pro Install tiers: (1) Secure at $34.99/month, cancel at month 12 (24 remaining): 24 × $34.99 × 75% = ~$630. (2) Smart at $39.99/month, cancel at month 24 (12 remaining): 12 × $39.99 × 75% = ~$360. (3) Complete at $49.99/month, cancel at month 6 (30 remaining): 30 × $49.99 × 75% = ~$1,125. ADT's self-setup plan (ADT+) has no contract and no ETF. To confirm your specific ETF, call ADT and ask for the cancellation balance — get it in writing before proceeding.
How much does it cost to cancel Vivint early? +
Vivint monitoring has no early termination fee — it's month-to-month. However, if you financed equipment through Citizens Pay (Vivint's financing partner), the full remaining equipment loan balance is still owed after you cancel monitoring. Worked example: $3,000 equipment financed over 60 months at month 24 = 36 remaining payments of $50/month = ~$1,800 remaining. Canceling monitoring doesn't eliminate that balance. The only way to avoid this is to pay off the equipment loan in full, or to have purchased equipment upfront. Contact Vivint directly and request your current equipment payoff amount before canceling.
Will I have a gap in monitoring coverage when I switch? +
You can avoid a gap by scheduling your new system activation to coincide with or slightly overlap your old system cancellation date. Coordinate the cutover timing with both providers.
How much notice do I need to give my current provider? +
Most providers require 30 days written notice. Some require more. Check your contract for the notice period and preferred method (written notice, certified mail, or online portal).
What happens to my equipment if I cancel my ADT or Vivint contract? +
For ADT, equipment installed under a standard residential contract is typically owned by the customer after fulfilling the service term. For Vivint, check your specific agreement — equipment financing may need to be settled separately from the service contract.

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