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. A book of monitored or alarm receiving centre (ARC) accounts is frequently valued on a multiple of Recurring Monthly Revenue (RMR), typically 30x to 45x monthly RMR, rather than on an EBITDA multiple. A generalist who values a monitoring business on a guarding-style profit multiple will badly under-represent it. A specialist knows to separate the monitoring book from the rest of the business and value it on the basis buyers actually use.

Source: DealFlowAgent, Security Systems Valuation Multiples, April 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 certification typically stays with the company, and an asset sale, where the buyer needs their own. 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. 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 31 January 2027 as the deadline to switch off the analogue PSTN, after which legacy alarms still on copper lines will fail. 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: BT Business / Openreach guidance, 2025.

TUPE for SIA-Licensed Staff

When a security business changes hands, TUPE (Transfer of Undertakings) regulations protect your employees. 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 structure the TUPE process 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 applies sub-sector-appropriate methods: an EBITDA multiple for the guarding or installation side, and an RMR multiple for the monitoring book, informed by recent comparable activity in the security sector. They know that a business with current NSI Gold or ACS status and a stable book of monitored accounts will command a materially higher figure than one reliant on labour-led guarding contracts, and they present your business 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, typically 8 to 10 pre-vetted buyers per business, with the buyer paying the fee rather than you.

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.