Is SIA ACS Worth It? Real Costs vs Contract Value for Small Security Companies

Is ACS accreditation worth it for a small security company? Yes, when you bid for local authority, NHS, corporate or facilities management contracts—or supply guards as a sub-contractor to larger ACS-approved firms—where a single contract outweighs the £400 to £1,600 SIA application fee, the £25 per officer annual registration fee, and your annual assessment fee.

If you only work for small private clients who never ask for Approved Contractor Scheme status, or if you have traded under contract for less than 12 months, wait and build your compliance records first. This guide breaks down verified 2026 fees, worked cost examples for 10, 25 and 60 staff, what contracts ACS opens, and how to decide if now is the right time. If you already plan to apply, visit our SIA ACS accreditation support hub or our main how to get SIA ACS approval guide.

Is ACS accreditation worth it, and who does it pay off for?

When security company directors ask “is ACS accreditation important?” or “does ACS accreditation matter?”, the answer depends on how you win work. The Approved Contractor Scheme is voluntary—you only need individual SIA licences to operate legally—but in commercial and public procurement, ACS is the standard filter buyers use to shortlist guarding, door supervision, keyholding and CCTV contractors.

What is the full SIA ACS cost in 2026?

To judge whether ACS is worth the money, you need the full SIA approved contractor cost—not just the headline application fee. Every approved contractor pays two sets of direct fees (statutory SIA fees and independent assessing-body fees) plus internal preparation time.

1. Statutory SIA ACS fees (application and annual registration)

According to GOV.UK guidance on applying for ACS approval and its fee changes notice, you pay two non-refundable fees directly to the SIA:

• Application fee: paid in full when you apply, and every three years when you renew. It varies by the number of licensable staff in your organisation.
• Annual registration fee: paid after approval and every year on re-registration. On 1 June 2026, this fee rose from £15 to £25 per licensable individual deployed—the first increase since the scheme began in 2006.

2. Assessing-body day rates (annual assessment fee)

The SIA partners with three assessing bodies—British Assessment Bureau (part of Amtivo Group Limited), NSI, and SSAIB—to conduct your initial and annual assessments. Assessment duration depends on effective personnel, company offices/control rooms, client sites protected, sectors applied for, and organisational structure. GOV.UK publishes the maximum day rates of the three partnered assessing bodies:

Always request written quotes from all three bodies. Parts of an assessment can be carried out remotely if agreed in writing beforehand.

3. Preparation time and optional consultancy

Before the assessor visits, you must complete the 78-indicator SIA ACS self-assessment workbook, screen staff to BS 7858, and compile at least 12 months of operational, training, payroll and contract records. You can prepare internally using management time or use a consultant. At ESC Support, consultancy is quoted after scoping, with a free initial consultation. See our SIA ACS consultancy cost guide for how preparation options compare.

Worked examples: 10, 25 and 60 licensable staff

The table below compares Year 1 and ongoing annual costs for 10, 25 and 60 licensable staff. Cash lines use only verified SIA fees and GOV.UK maximum assessor day rates, alongside a clearly labelled estimate for internal staff time.

For a 10-officer firm, Year 1 direct fees sit around £1,750 to £2,375; for a 25-officer firm, around £3,025 to £3,675. Winning one small manned guarding contract, a multi-site keyholding agreement, or regular sub-contracted shifts from a larger ACS provider normally covers that annual outlay inside the first few months.

ACS approved security company benefits: what does it open?

Holding SIA Approved Contractor status gives a small security business four commercial and operational advantages documented on GOV.UK.

1. Public sector tenders, councils and frameworks

Many local authorities, housing associations, NHS trusts, universities and principal contractors require SIA ACS approval in selection questionnaires. GOV.UK notes that ACS approval is required for many public contracts—for example, any contractor or sub-contractor providing security services under a Scottish Government contract must be ACS approved—and the SIA promotes its Register of Approved Contractors to councils, government departments and commercial buyers.

2. Sub-contracting work for larger ACS contractors

One of the biggest practical ACS approved security company benefits is supply-chain access. Under SIA approval conditions, approved contractors may only sub-contract to other approved contractors unless the SIA gives explicit permission. Holding ACS puts your company on the approved supplier list when national or regional security firms need local guarding, door supervision or alarm response cover.

3. Licence Dispensation Notices (LDNs) and Licence Assist

Only approved contractors can be granted SIA permission to use Licence Dispensation Notices (LDNs), allowing you to deploy security staff while the SIA processes their licence applications. Approved contractors also get access to the SIA’s Licence Assist and Licence Management services, use of the ACS accreditation mark on proposals, vehicles and websites, and potential leverage when negotiating commercial insurance.

4. Verified ACS scores and ACS Pacesetters status

Standard-route contractors are scored against 78 indicators up to a maximum of +145. According to the SIA’s figures on GOV.UK (1 October 2025 to 30 September 2026), median initial annual assessment scores are 41 (up to 10 licensable staff), 62 (11 to 25), 82 (26 to 250), and 125 (over 250). Contractors scoring in the top 15% (requiring +110 under the current workbook) qualify to join The ACS Pacesetters, an independent directory used by buyers to shortlist high-scoring firms.

When should a small security company wait before applying?

Because the SIA application fee is non-refundable and new applicants have 6 months from eligibility confirmation to complete their assessment and close any improvement needs, wait before applying if:

1. Under 12 months of contracted trading: GOV.UK rules require at least 12 months of contracted trading in SIA-regulated security services in the UK.
2. Fewer than two licensable operatives per sector: You must supply at least two licensable operatives in each activity you apply for.
3. Operatives are not PAYE employees: Deployed operatives must be employees or employees for tax purposes.
4. Any director is unlicensed: All directors (executive, non-executive, shadow and parent company directors) and deployed staff must hold a valid SIA licence.
5. BS 7858 files are incomplete: Assessors use BS 7858 as the staff screening benchmark. Fix vetting gaps during your SIA ACS assessment preparation before applying.

Why is ACS so expensive, and how can you keep costs down?

When owners ask “why is ACS so expensive?”, three factors explain the bill: assessing bodies charge professional day rates regardless of turnover, the annual per-officer registration fee rose from £15 to £25 on 1 June 2026, and fixing retrospective screening gaps takes management time. Keep your SIA ACS cost down with four steps:

• Compare all three assessing bodies: Request quotes from British Assessment Bureau, NSI and SSAIB, and ask whether remote half-days (£500–£600 max) apply.
• Only apply for active contracted sectors: Extra sectors add assessment time and require two operatives and contract records per activity.
• Pass first time without re-visits: Audit every staff vetting file and licence record beforehand to avoid re-visit fees.
• Use the Standard Route unless you need NSI Gold: The Passport Route (via the NSI ACS Passport Scheme) suits firms wanting combined ISO 9001 and British Standards certification; the Standard Route is more direct for a small first-time applicant.

Verdict checklist: should you apply now?

Tick the statements that apply to your security business today:

• We have provided SIA-regulated security services under contract in the UK for at least 12 months, with at least two PAYE operatives per sector.
• Every company director and every deployed officer holds a valid SIA licence.
• Our vetting files meet BS 7858, and our service delivery aligns with relevant British Standards (BS 7499, BS 7894, BS 10800).
• We want to bid for council, public sector, FM or ACS sub-contract work requiring SIA ACS approval.
• Winning one target contract or sub-contract in the next 12 months would exceed our Year 1 ACS cost (£1,750–£3,675 for 10–25 staff).
• Someone in the business is nominated to maintain the workbook, internal audits and annual return each year.

If you can tick the first three eligibility rules and at least two commercial points, is ACS accreditation worth it? Yes—apply now. If any of the first three are missing, close those gaps before paying the SIA fee.

Frequently asked questions

How much does SIA ACS cost?

You pay a non-refundable SIA application fee (£400 for up to 10 licensable staff, £800 for 11–25, £1,600 for 26–250, or £2,400 for over 250) on initial application and every three years on renewal, plus an annual SIA registration fee of £25 per licensable individual deployed (from 1 June 2026). You also pay your assessing body (British Assessment Bureau, NSI or SSAIB), whose GOV.UK maximum day rates are £1,100–£1,125 for a full in-person day and £500–£675 for a half-day.

Is ACS mandatory?

No. The SIA Approved Contractor Scheme is voluntary. Operatives in regulated roles must hold an individual SIA licence by law, but a company can trade legally without ACS status unless a buyer or tender requires it.

Can a new security company get ACS?

Not in its first year. Under GOV.UK eligibility rules, you must have provided SIA-regulated private security services under contract in the UK for at least 12 months, with at least two licensable operatives in each activity sought.

Does ACS guarantee contracts?

No accreditation guarantees work. SIA ACS qualifies you to bid for ACS-restricted public tenders, commercial FM supplier lists and sub-contract work for other ACS-approved contractors, and gives access to Licence Dispensation Notices (LDNs).

Does ACS accreditation matter if we only sub-contract to larger security firms?

Yes. SIA approval conditions state that an approved contractor may only sub-contract licensable work to another SIA approved contractor unless the SIA grants explicit permission.

Sources: GOV.UK: Apply for ACS approval; GOV.UK: Fee changes for SIA licensing and approval services (1 June 2026); GOV.UK: Understanding ACS assessments; GOV.UK: Find out why you should apply for ACS approval; GOV.UK: Choosing an SIA approved contractor; GOV.UK: Keep your ACS approval; The ACS Pacesetters. Last checked: October 2026.