Best SSIP scheme for small business UK (2026)

You're a sole trader or you run a 2 to 5 person cleaning firm. A council tender lands. The pre-qualification questionnaire wants "SSIP-recognised accreditation". You panic-Google CHAS, see £429+VAT, then read about CAS, then read about Constructionline at £2,500+, then close the laptop.

Stop. The SSIP scheme decision for a micro-firm is straightforward. The expensive options exist for big-team operations bidding on £5m+ contracts. For sole traders and firms under 5 employees, two schemes win on price and speed every time. This is the honest comparison.

• Sole traders and micro-firms (1 to 5 employees) need entry-tier SSIP-recognised accreditation, not CAS-level.
• Cheapest entry-tier: SMAS Worksafe SSIP from £345. CHAS Standard from £429+VAT close behind.
• Fastest certification: SMAS Worksafe targets 1 to 10 days for clean applications.
• Both are accepted by almost every UK public-sector cleaning buyer through SSIP Deem to Satisfy.
• Constructionline is overkill at the small-firm tier — Trustpilot users report £622 to £5,000+ a year. Avoid unless a buyer demands it by name.
• CAS (CHAS Elite, Worksafe Pro) is only required on public-sector projects over £5 million. Don't pay for it below that threshold.

What's in this comparison¶

• What SSIP actually requires from a small UK firm
• The four mainstream schemes ranked by small-firm fit
• Sole trader: cheapest path to SSIP accreditation
• 1 to 5 employees: same answer, slightly higher prices
• Why Constructionline is the wrong call at this size
• Why CAS is overkill below £5m projects
• Where CleanTender fits
• Verdict + what to do this week

What SSIP actually requires from a small UK firm¶

SSIP (Safety Schemes in Procurement) is the umbrella body. The 15 Core Criteria it tests against are the same regardless of firm size. The criteria cover health and safety policy, risk assessment, accident reporting, training records, insurance certificates, and equality and environmental basics.

For a sole trader or 2 to 5 person firm, the documentation effort is real but not enormous. A one-page H&S policy. A risk assessment per service line. A RIDDOR record (probably blank). Insurance certificates. A short equality and environmental policy. Most micro-firms put it together in a long weekend.

If you don't have a written H&S policy yet, you'll write it once for SSIP and reuse it on every bid for the next decade. The first SSIP application is a one-time documentation cost.

Pro tip

The four mainstream schemes ranked by small-firm fit¶

Sole trader: cheapest path to SSIP accreditation¶

If you're a sole trader operating as a self-employed cleaner or a single-director limited company with no staff, SMAS Worksafe SSIP at £345 is the entry. CHAS Standard at £429+VAT (£514.80 with VAT) is the runner-up.

Don't apply for both. Hold one. Use Deem to Satisfy if a buyer demands the other later — DTS passports cost a fraction of a full assessment and clear in minutes once your upload is clean.

1 to 5 employees: same answer, slightly higher prices¶

Both CHAS and SMAS scale pricing by employee bracket. The first jump usually kicks in at 5 to 15 employees, so a true micro-firm of 1 to 4 staff often stays at the entry-tier price. Check the live price grid on the scheme's site before applying — pricing changes.

At this size the documentation requirement is the same shape as a sole trader. The only added complication: more named operatives means more training records and DBS certificates to maintain on file. That's not the SSIP scheme's problem, it's just the operational reality of having staff.

Why Constructionline is the wrong call at this size¶

Public Trustpilot reviews of Constructionline from early 2026 paint a hard picture for small firms. One reviewer reports paying £108 for the service in 2012 and £2,529 in 2026 — a 23× increase over 14 years. Another reports £180 in 2020 to £958 in 2026. Some users now report annual costs of £5,000+. Assessment turnaround sits at 10 to 16 working days for clean applications, with rejection cycles adding a full re-assessment loop on top.

For a sole trader or 5-person cleaning firm, this is the wrong fit. The Trustpilot-cited price escalation, slower turnaround, and reports of "no SME size differentiation" mean you pay for documentation depth aimed at national operators with bid teams.

If a buyer's tender pack names Constructionline by name, raise a clarification question asking whether they'll accept a Deem to Satisfy passport from CHAS or SMAS. Most will. Buyers must publish the answer to every bidder, so you give nothing away by asking.

Why CAS is overkill below £5m projects¶

PPN 03/24 (in force from 27 June 2024) mandates the Common Assessment Standard on public-sector projects over £5 million. CHAS Elite and Worksafe Pro both map to CAS. For a sole trader or micro-firm chasing council cleaning bids worth £30k to £200k a year, you are not in CAS territory. Pay for entry-tier SSIP, not CAS.

Step up to CAS only if you're chasing high-value NHS or central-government work, or sub-contracting under a Tier 1 FM provider that mandates it for the project.

Where CleanTender fits¶

CleanTender is not an SSIP scheme. You still need CHAS, SMAS, SafeContractor, or Constructionline for the pre-qualification gate. CleanTender stores which scheme you hold on your profile and feeds it into the qualification scan on every contract.

The CleanTender profile, in full

One-time setup. Fill it out carefully once and the qualification scan stops giving false positives. The fields stored:

• Company basics: trading name (verbatim on every bid), annual turnover (most public buyers want at least 2× contract value), years trading, operative count.
• Insurance cover: actual public liability and employer's liability £ figures. £5m PL is the typical floor for council and NHS contracts; statutory employer's liability minimum is £5m.
• Quality standards: ISO 9001, ISO 14001, ISO 45001, BICSc, plus all four SSIP schemes (CHAS, SafeContractor, Constructionline, SMAS), plus COSHH compliance.
• Vetting and policies: DBS policy (required for schools and NHS), TUPE experience, Modern Slavery Act, Equal Opportunities, Social Value with National TOMs alignment (10 to 20% bid scoring weight under PPN 002), environmental / green cleaning policy, KPI framework, business continuity plan.
• Sector experience: schools, NHS, councils, housing associations, food and BRC, universities, leisure, offices, public conveniences. Tick every sector you currently or recently held contracts in. The evaluator boosts qualification scores on sector-relevant tenders.
• Regions covered: 12 UK regions. Buyers value local mobilisation; the score reflects whether you cover the contract's region.
• Free-text company description: anything the structured fields don't capture — flagship clients, niche service lines, specialist equipment, anything you'd want a buyer to weight.

Why the depth matters at micro-firm tier: a small contractor without a stored profile gets generic feedback when a tender is read by AI. With the profile filled in, the evaluator knows your insurance is already at £5m, your SSIP is current, your DBS policy is in place. It stops flagging non-issues and starts flagging the real gaps — usually one or two specific items per contract you can actually fix.

Verdict + what to do this week¶

1. If you're a sole trader: apply for SMAS Worksafe SSIP at £345. The 1 to 10-day turnaround is the safest bet on hitting your first tender deadline.
2. If you're 2 to 5 employees and not yet accredited: same answer. SMAS first, CHAS as the runner-up.
3. If you already hold one and a buyer demands the other: don't repurchase. Apply for a Deem to Satisfy passport.
4. If you've been quoted £2,000+ for Constructionline at this size: walk. The market has cheaper, faster options that satisfy the same buyer requirements.
5. If you're chasing public-sector work over £5m: step up to CHAS Elite or Worksafe Pro for CAS-level under PPN 03/24. Below that threshold, entry-tier is correct.

Once SSIP is sorted, the bottleneck moves to qualification + drafting. See CHAS vs SMAS Worksafe head-to-head for a deeper price + turnaround comparison, or Constructionline alternatives if you're already paying Constructionline and want out at next renewal.