An alarm and security monitoring company typically sells for 25x–45x its monthly Recurring Monthly Revenue (RMR), making it one of the few small business categories valued on a revenue-asset model rather than traditional earnings multiples. The U.S. security alarm industry includes roughly 10,000 monitoring companies managing an estimated 40 million subscriber accounts, generating over $50 billion in combined annual revenue. The market is one of the most actively consolidated in the service economy, with national monitoring companies like ADT, Brinks, and Safe Streets, PE-backed regional platforms, and independent dealers all competing for quality RMR portfolios.

The primary valuation method for alarm companies is a multiple of monthly Recurring Monthly Revenue. RMR is the total monthly billing from all active monitoring accounts — the predictable, contractual income that arrives every month regardless of new installations or service work. RMR multiples typically range from 25x to 45x, meaning a company with $50,000 in monthly RMR would be valued between $1.25M and $2.25M. The range is driven by five quality factors: annual attrition rate (the percentage of accounts that cancel each year), contract documentation quality, average RMR per account, contract term remaining, and communication technology deployed. A book at 25x typically shows annual attrition above 10%, has significant accounts on month-to-month or expired contracts, averages below $30 per account, and includes legacy phone-line communicators. A book at 45x shows attrition below 5%, has 90%+ of accounts on active 36-month or longer contracts, averages $45+ per account with interactive services, and runs on cellular or IP communicators exclusively.

Seller's Discretionary Earnings — the owner's total economic benefit including salary, benefits, and add-backs — is sometimes referenced alongside RMR multiples to evaluate the installation and service side of the business, but it is not the primary valuation driver. SDE on the non-RMR portion of the business (installation revenue, service call income) typically adds 0.5x–1.5x to the RMR-based valuation. Most alarm company buyers view installation and service as supporting capabilities that feed RMR growth rather than as independently valuable revenue streams.

For larger alarm operations with $100K+ in monthly RMR and institutional-quality contract portfolios, national consolidators and PE-backed platforms apply premium multiples at the top of the 40x–45x range or above. These buyers evaluate the book as a financial asset — essentially a portfolio of contracted cash flows — and price it using discounted cash flow analysis that accounts for attrition, contract renewal probability, and revenue growth potential. At institutional scale, the buyer's ability to reduce monitoring costs through central station consolidation and improve retention through technology upgrades creates acquisition economics that justify premium pricing.

The unique valuation factor that makes alarm companies fundamentally different from every other small business is that the business is valued as a financial asset — a portfolio of contracted recurring revenue streams — rather than on earnings or cash flow. This asset-based model means that operational profitability matters less than the quality metrics of the account portfolio itself. A marginally profitable alarm company with $80K in high-quality RMR at 4% attrition on long-term contracts is worth more than a highly profitable installation company generating $500K in annual project revenue with only $30K in RMR, because the acquirer is buying the recurring revenue stream, not the business's operating margin. This distinction catches many alarm company owners off guard — they focus on growing installation revenue and overall profitability while neglecting the RMR quality metrics that actually determine their sale price. The single most consequential metric is attrition rate, which functions as the yield deterioration rate on the revenue asset. A portfolio at 5% annual attrition loses half its original accounts over 13 years; at 12%, that halving occurs in under 6 years. Buyers model lifetime value per account by projecting revenue forward at the portfolio's demonstrated attrition rate, and even a 2% difference in attrition can shift the RMR multiple by 5x–8x — representing hundreds of thousands of dollars on a midsize book. Every investment in customer retention — proactive service, technology upgrades, contract renewal programs, responsive support — translates directly to RMR multiple improvement at a rate that dwarfs the impact of adding new accounts.

The alarm industry M&A market remains among the most active and well-organized in all of small business. National consolidators run continuous acquisition programs with standardized pricing models. Regional PE-backed platforms acquire to build density and central station scale. Independent dealers acquire competitor books for geographic expansion. The market benefits from a standardized asset structure (RMR × multiple) that makes transactions relatively straightforward compared to other industries. For alarm companies with low attrition, strong contract documentation, modern technology, and diversified account portfolios, the current market offers competitive multiples and efficient deal processes. Companies with high attrition, legacy technology, or poor contract documentation should invest 18–24 months in portfolio quality improvement before entering the market.

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