Specialist vs General Business Broker: Why It Matters for Security Companies

When the time comes to sell your security business, one of the most consequential decisions you will make is who you instruct to manage the sale. The difference between a specialist security sector adviser and a generalist business broker is not a minor distinction. It directly affects your valuation, the quality of buyers you attract, the speed of the process, and the final deal structure.

What a Generalist Broker Will Miss

A generalist business broker sells everything: restaurants, retail shops, manufacturing firms, and service businesses. They apply the same process to every type of business, using standardised valuation methods and listing your company on public marketplaces. For a security business, this approach leaves significant value on the table, and in a sector built on confidentiality it can also create real risk.

Recurring Monitoring Revenue and ARC Account Books

Recurring monitoring revenue is the single biggest value driver in electronic security. In the US, a book of monitored or alarm receiving centre (ARC) accounts is frequently valued on a multiple of Recurring Monthly Revenue (RMR), that monthly figure times a set number, rather than on a multiple of yearly profit, known as EBITDA. A specialist knows to separate the monitoring book from the rest of the business, so a buyer can see what it earns on its own.

Source: Security Systems Valuation Multiples, updated October 2026.

Accreditation Transfer: NSI Gold, SIA ACS and SSAIB

Your SIA Approved Contractor Scheme status, NSI Gold (the legacy NACOSS Gold) approval, or SSAIB certification is one of your most valuable assets. It underpins tender eligibility, insurance, and self-certification, and it represents years of investment in quality systems and trained personnel. A generalist broker will not understand the distinction between a share sale, where the buyer takes on your company as a whole and its SIA approval stays with it, and an asset sale, where the buyer buys what the business owns and uses and has to apply for its own. For SIA approval that is GOV.UK's published rule, and a change of owner must be reported to the SIA within 21 days; NSI and SSAIB set their own rules, so ask the body. Getting this wrong can cause months of delay or a gap in certification that makes the deal fall apart.

A specialist plans for accreditation transfer from day one, advising on the right deal structure to preserve your status and avoid disruption to your clients and your contract eligibility.

BS 7858 Vetting and SIA-Licensed Staff

Security is a regulated, people-led sector. Your SIA-licensed operatives and BS 7858-compliant screening records are a core part of what a buyer is acquiring, and gaps in either are a red flag in due diligence, the buyer's detailed check of your business. A generalist broker will treat staffing as a standard schedule of employees. A specialist understands that current licensing and complete vetting records are part of the asset, and presents them as such.

The PSTN Switch-Off and Signalling Due Diligence

Buyers of monitored businesses now ask a specific question: are your accounts still signalling over the copper PSTN network. Openreach has confirmed January 2027 as the deadline to switch off the analogue PSTN, and legacy alarms still on copper lines need upgrading before then. Accounts not yet migrated to IP or dual-path signalling are a re-signalling liability that a buyer will price into the offer. A generalist broker will not know to raise it. A specialist addresses it before you go to market, so it does not become a discount during negotiations.

Source: Openreach, September 2026; GOV.UK, Moving landlines to digital technologies, May 2025.

TUPE for SIA-Licensed Staff

When a security business changes hands, your employees are protected either way. If the buyer buys your company's shares, their employer does not change. If it buys the business's assets, TUPE (Transfer of Undertakings) regulations move them to the new owner on their existing terms, as your officers will know from guarding contracts changing hands. For security businesses, this is not just a legal formality. Your SIA-licensed, BS 7858-vetted operatives, and the continuity of the contracts they staff, are a core part of what the buyer is paying for.

A specialist understands how to handle the staff side of the sale, including TUPE where it applies, so that it protects your staff, reassures the buyer, and preserves the team continuity and contract stability that underpin the business's value. A generalist may treat TUPE as a box-ticking exercise, missing the strategic importance of a retained, compliant workforce in the deal structure.

The Valuation Difference

Generalist brokers typically value security businesses using broad industry multiples that fail to capture the premium attached to recurring monitoring revenue, accreditation, and long-term commercial contracts. The result is a valuation that under-represents your business to buyers, particularly if a monitoring book is buried inside a single blended multiple.

A specialist values each part of the business on its own evidence: the profit of the guarding or installation side, and the recurring revenue and attrition of the monitoring book. They know that current NSI Gold or ACS status and a stable book of monitored accounts are central to how a buyer sees the business, and they present it accordingly.

The Buyer Network Difference

Generalist brokers list your business on public marketplaces and wait for enquiries. This approach attracts bargain hunters and buyers who do not understand the security sector, and it puts your confidentiality at risk: staff, clients, and competitors can all see that the business is for sale.

A specialist runs a confidential, competitive process to a network of qualified buyers who are actively seeking security businesses: private-equity-backed consolidation platforms building national coverage, regional security groups expanding their monitoring and systems capability, and experienced individual acquirers with sector knowledge. These buyers understand what they are buying and are willing to pay for quality. A single offer is convenient uncertainty; real certainty comes from having options.

When a Generalist Might Be Sufficient

To be fair, there are scenarios where a generalist broker may be adequate: if your business is small (under £250,000 turnover), holds no accreditation, has no monitoring or recurring revenue, and no long-term contracts, the sector-specific factors that drive specialist value are less relevant. But if your business has any of the characteristics described above, and most established security firms do, the difference in outcome between a specialist and a generalist is substantial.

For the stages of a sale, from the first confidential approach to completion, see how Simon Read runs a sale.