Key takeaways
- Alarm monitoring businesses are typically valued at 30–50x RMR (Recurring Monthly Revenue), not EBITDA; at $100K of monthly monitoring RMR, this translates to $3–5M of enterprise value from the monitoring portfolio alone, independent of any installation or service revenue.
- Attrition rate is the single most important metric in alarm monitoring valuation, annual account attrition above 10% signals an account quality or service problem that buyers price as accelerated RMR decay, reducing the multiple they will pay for each dollar of monthly revenue.
- Creation cost (the cost to acquire and install each new monitoring account) and dealer agreements (wholesale accounts bought from third-party dealers) are scrutinized separately because dealer accounts typically command a lower multiple than self-generated (direct) accounts due to lower loyalty and higher attrition.
- Guard services, systems integration, and managed security services businesses are valued differently than monitoring (typically on EBITDA at 5–8x) because their revenue is project-based or labor-dependent rather than true recurring; sellers with mixed models should understand how buyers separate and value each revenue stream.
- Central station monitoring capabilities (whether the company operates its own UL-listed central station or contracts monitoring to a third party) significantly affect both valuation and buyer universe; companies with proprietary central stations have higher infrastructure value but also higher operational complexity that acquirers evaluate carefully.
In this article
- The RMR valuation model: why security businesses are priced differently than other companies
- Selected precedent security and alarm monitoring transactions, 2022-2026
- What moves the multiple
- Attrition: the metric that defines monitoring portfolio quality
- Account quality, contract terms, and what buyers evaluate in diligence
- Guard services and systems integration: how buyers value the non-monitoring business
- Preparing a security business for sale: documentation and the buyer process
How to use this before a process
The RMR valuation model: why security businesses are priced differently than other companies
For adjacent context, compare this with Selling a Precision Machining or Metal Fabrication Business: What Buyers Evaluate and Selling an Electrical or Plumbing Contractor: M&A Issues Unique to Licensed Trades; the strongest operators connect these topics instead of treating them as separate workstreams.
Rule of thumb: if a buyer will ask for it in diligence, build it before the process. The same work costs less, creates more confidence, and carries more valuation benefit when it is completed before exclusivity.
Buyer Diligence Checklist
- Confirm the buyer has authority, capital, and a clear approval path.
- Ask for references from prior sellers, lenders, executives, or capital partners.
- Understand what the buyer plans to change in the first 100 days.
- Compare closing certainty, cultural fit, and structure, not just headline price.
- Keep competitive tension until the buyer proves it can close on the proposed terms.
Readiness Snapshot
What buyers will ask
Does the buyer have authority and capital to close?; What approvals remain after LOI signing?; How has this buyer treated sellers in prior transactions?
What to prepare
Buyer references and prior transaction list.; Capital source, lender status, and approval path summary.; Post-close governance and operating plan outline.
Buyer evaluation path
Alarm monitoring companies are among the few businesses in the lower middle market where the primary valuation currency is not EBITDA but RMR, Recurring Monthly Revenue from monitoring contracts. The RMR model reflects the fundamental economic structure of alarm monitoring: a stable, contractually committed revenue stream with very low incremental service cost once the account is installed and connected to a central station. Each monitoring customer pays a monthly fee regardless of whether they use the system (the margin on monitoring is typically 60–80%) which makes the revenue highly predictable and its present value straightforward to calculate.
Security Business Valuation by Revenue Type
For businesses with mixed revenue, a security company that installs systems, monitors them, and provides guard patrols, buyers will break the business into components and value each separately. The monitoring RMR portfolio gets the highest multiple; the guard services and installation revenue get EBITDA-based multiples that reflect their lower margin and higher labor dependency. Sellers who present blended revenue without segmentation are ceding the narrative to buyers who will do the segmentation themselves, usually with conservative assumptions.
The monitoring multiple of 30–50x RMR translates to a different EBITDA multiple depending on margins. At 70% monitoring margins, 40x RMR is approximately 12–14x EBITDA. This is not a premium, it is a translation of the same economic value into the two common expression formats. Sellers who are told they are getting "40x RMR" and assume this is a different valuation methodology than EBITDA should reconcile the two to ensure they are comparing offers on an apples-to-apples basis.
Selected precedent security and alarm monitoring transactions, 2022-2026
Security and alarm monitoring businesses often trade on recurring monthly revenue rather than EBITDA alone. Account attrition, contract assignment, monitoring gross margin, and commercial mix drive buyer underwriting.
Scroll to see more →
Source basis: 2025 alarm-company valuation benchmarks, public Everon / ADT transaction reporting, and MSA / Autronica public transaction reporting.
What moves the multiple
The precedent comps are useful context, but buyers do not pay the same multiple for every business in a sector. They adjust valuation based on evidence that the business can sustain earnings, transfer customer relationships, and keep operating without the founder carrying the system personally.
Scroll to see more →
The practical seller objective is not to argue that the company deserves the highest public comp. It is to prove which risks do not apply, which risks have already been fixed, and which operating strengths justify the buyer moving toward the higher end of the relevant range.
AI diligence angle
Run a short scan to identify reporting, data room, and workflow gaps that could affect diligence confidence.
Run an AI readiness scan →Attrition: the metric that defines monitoring portfolio quality
Annual attrition rate, the percentage of RMR lost each year from account cancellations, non-renewals, and credit write-offs, is the single most important quality signal in alarm monitoring M&A. Attrition rate determines how long it takes the buyer to recover their investment in the portfolio. A portfolio with 8% annual attrition has a different economic life than one with 15% attrition, and buyers price the difference in the multiple they will pay.
Attrition is measured at the account level (what percentage of accounts cancel each year) and at the RMR level (what percentage of RMR is lost each year). RMR attrition and account attrition can diverge: if higher-RMR commercial accounts cancel at a higher rate than residential accounts, the RMR attrition will be worse than the account attrition, and vice versa. Buyers want both metrics for the trailing 36 months, calculated consistently (not cherry-picking favorable calculation periods).
Attrition Rate and Monitoring Multiple
The drivers of high attrition that buyers investigate: dealer-originated accounts (accounts bought from third-party alarm dealers have structurally higher attrition than direct-generated accounts), short or no contract terms (monitoring accounts without a minimum-term contract cancel at will), geographic concentration (accounts in markets served by strong regional competitors), and poor service response (customers who experience repeated false alarm dispatches or slow service response cancel at higher rates). Sellers should know their attrition by account source (direct vs. dealer), by geography, and by commercial vs. residential before any buyer conversation.
Account quality, contract terms, and what buyers evaluate in diligence
Not all RMR is equal. Buyers distinguish between account quality dimensions that affect the long-term sustainability of the revenue stream, and these distinctions drive material differences in the effective multiple paid for each dollar of monthly revenue.
Account Quality Dimensions in Alarm Monitoring M&A
Dealer accounts deserve special attention. Security companies that have grown RMR by purchasing bulk accounts from alarm dealers, companies that install systems and sell the monitoring contracts to a third party for an upfront lump sum, typically pay $600–900 per account (25–35x monthly RMR). These dealer accounts have structurally higher attrition than direct accounts because the selling dealer had no long-term relationship with the customer; the customer's relationship was with the dealer's installer, not with the monitoring company. Buyers will request the attrition breakdown by account source. If dealer accounts represent a large proportion of the portfolio and have materially higher attrition than direct accounts, buyers will apply a weighted attrition that reflects the actual portfolio quality.
Guard services and systems integration: how buyers value the non-monitoring business
Security companies that combine monitoring with guard patrol services or systems integration face a more complex valuation than pure monitoring businesses. Buyers value each revenue stream on its own economics, and guard services and installation revenue are valued at far lower multiples than monitoring, reflecting their fundamentally different margin profile and revenue predictability.
Guard services are a labor business: revenue is generated by officers working shifts, and the gross margin is typically 18–25% (revenue minus direct labor costs, payroll taxes, and officer benefits). EBITDA margins on guard services are typically 6–12%, thin, labor-dependent, and subject to wage rate pressure, workers' compensation costs, and contract renewal risk. Buyers value guard services at 4–6x EBITDA, reflecting the lower margin and higher operational complexity. A guard services business generating $500K of EBITDA is worth $2–3M; the same $500K of EBITDA from a monitoring business would be worth $6–7M.
Systems integration (installing, configuring, and servicing security systems) has better margins than guard services (typically 30–40% gross margin on installed projects) but is project-based, requiring constant sales pipeline to replace completed projects. Buyers value integration revenue at 5–7x EBITDA when the business has a documented pipeline, recurring service contract revenue (annual maintenance agreements), and an estimating and project management capability that can operate independently of the owner.
For security business founders with mixed revenue, the pre-sale positioning strategy is clear: maximize the monitoring RMR component because it commands the highest multiple.
This means converting service-only customers to monitoring contracts where possible, selling monitoring upsells to existing installation customers, and documenting the monitoring revenue separately from service revenue. Every $1,000 of monthly RMR added in the 24 months before a sale is worth $35,000–50,000 in enterprise value, the best ROI available to a security business owner preparing for a transaction.
Preparing a security business for sale: documentation and the buyer process
Security business M&A moves faster than most industries when the seller is prepared, buyers know exactly what they want to see, and the due diligence process is well-established. The challenge is assembling the monitoring portfolio data in the format buyers expect, because most alarm software systems require custom reporting to produce the attrition, account source, and RMR aging data that buyers require.
Pre-Sale Documentation for Security and Monitoring Business M&A
RMR portfolio data
Total RMR by account type (residential, commercial); attrition by month for trailing 36 months; account source breakdown (direct vs. dealer); average RMR per account; geographic distribution by zip code or market
Contract documentation
Copy of standard monitoring agreement; sample of executed customer contracts (buyers typically sample 5–10% of accounts); confirmation of contract terms (length, auto-renewal, termination provisions) for bulk of portfolio
Financial records
3-year P&L with monitoring, guard, and installation revenue separated; EBITDA by business line; central station costs (if self-operated) or third-party monitoring fees (if outsourced); creation cost per new account for trailing 3 years
Operational
Central station documentation (if owned): UL listing certificate, staffing, redundancy capabilities; license documentation (state alarm contractor licenses for each operating state); insurance certificates
Customer concentration
Top 20 accounts by RMR; account history and contract terms for any account representing 5%+ of total RMR
The buyer process for a security business typically involves 2–4 qualified buyers. The buyer universe is relatively concentrated: national platforms (ADT, Brinks, Pinkerton, Convergint), regional security consolidators, PE-backed security platforms, and financial buyers with security company experience. Running a structured process with multiple bidders (rather than accepting the first inbound offer) typically produces a 15–25% improvement in price for sellers who have prepared the documentation necessary to support a competitive process.
Frequently asked questions
How are monitoring contracts handled in a security company acquisition?
Monitoring contracts are assigned to the buyer as part of the acquisition. Most monitoring agreements contain assignment provisions, some permit assignment without customer notice; others require customer notification (but not consent). The key diligence question is whether each contract is properly executed (signed by the customer), contains clear auto-renewal provisions, and does not include termination-for-convenience clauses that would allow customers to cancel post-assignment. Buyers request a copy of the standard monitoring agreement form and a sample of executed contracts. Sellers who cannot produce executed contracts for a material portion of their portfolio face a purchase price holdback tied to contract documentation.
Work with Glacier Lake Partners
Discuss your security business sale
Glacier Lake Partners helps security services and alarm monitoring founders prepare for M&A processes and evaluate buyer offers in the RMR market.
Start a Conversation →AI diligence angle
See where AI can clean up readiness before buyers ask.
Run a short scan to identify reporting, data room, and workflow gaps that could affect diligence confidence.
Run an AI readiness scan →Research sources
Disclaimer: Financial figures and case-study details in this article are anonymized, composite, or representative examples based on middle market operating situations, and are not guarantees of outcome. Statistical references are drawn from cited third-party research; individual transaction and operational results vary based on business characteristics, market conditions, and deal structure. This content is for informational purposes only and does not constitute legal, financial, or investment advice. Consult qualified advisors for guidance specific to your situation.
Explore adjacent topics
