Group Health Insurance UK — The Full Guide

Group health insurance is a single master private medical insurance contract covering multiple employees under one policy number, one renewal date and one premium invoice. UK insurers accept groups from 2 lives (Bupa/AXA/Aviva) or 3 lives (Vitality). Pricing is community-rated for small groups and experience-rated once the scheme is large enough to be statistically credible — usually 50–250 lives depending on insurer.

Group Health Insurance: what the cover actually does

'Group health insurance' is the umbrella term for any employer-funded (or employer-facilitated) PMI scheme covering more than one employee under a single contract. It's mechanically simpler than a stack of individual policies: one policy schedule, one direct debit, one renewal conversation, one benefit definition. That simplicity is why 82% of UK employers offering PMI use a group scheme rather than reimbursing individual policies.

Group schemes divide broadly into four bands by size. Micro (2–9 lives) — pure community rating, moratorium underwriting standard, choice of leading UK PMI insurers. SME (10–49) — still community-rated but with tighter benefit customisation and MHD or CPME underwriting available. Mid-market (50–249) — transition band where experience rating kicks in and dedicated account management typically comes with the scheme. Corporate (250+) — full experience rating, bespoke benefit design, integrated wellness and often multi-provider (PMI with one insurer, EAP with another).

Underwriting choice is the single biggest driver of both cost and employee experience at inception. Moratorium excludes any condition an employee has had symptoms/treatment/medication for in the last five years for a two-year rolling period — cheapest and simplest, no forms. Medical History Declaration (MHD) requires each employee to declare conditions, priced individually. Full Medical Underwriting (FMU) is a full underwriting questionnaire per employee — most accurate pricing, highest admin. Continuous Personal Medical Exclusions (CPME) transfers your existing scheme's exclusions to a new insurer — critical when switching.

Key numbers our brokers work from

• UK employers offering group PMI: 24% (CIPD 2024) (CIPD H&W 2024)
• Average group scheme size in UK: 34 lives (LaingBuisson 2024)
• Group PMI market share of UK PMI: ~60% (LaingBuisson 2024)
• Minimum group size (major insurers): 2 lives (Provider literature 2025)
• Community-to-experience threshold: 50–250 lives (Provider literature 2025)
• Typical group PMI renewal 2025: +8–14% (PremierPMI placements)
• % of groups switching insurer at renewal: ~14% (LaingBuisson 2024)

Indicative monthly cost by scenario

Illustrative only — final premiums depend on age, postcode, excess, hospital list, underwriting and insurer terms at the time of quote.

Which insurers tend to fit best

Before you buy — broker checklist

• Provide an accurate employee census — DOB, postcode, dependants — before quoting.
• Choose underwriting type deliberately: moratorium (cheapest) vs MHD vs FMU vs CPME on switch.
• Confirm continuous cover on switch (CPME) so existing conditions stay covered.
• Set eligibility rules in writing — HMRC treats 'director-only' vs 'all-employee' differently.
• Choose excess wisely: £0 excess flatters user experience but costs 10–18% more than £250.
• Ask about family cover pricing and whether dependants can be added mid-term.

PremierPMI broker desk notes

• Underwriting choice at inception is the single most important call. Moratorium is fine for young, healthy workforces; MHD is usually best for mixed teams; FMU is worth it only where a founder or key employee has a known condition that needs day-one cover.
• For groups above 50 lives, we always model both single-insurer bundled placements (PMI + IP + GLA) and best-of-breed unbundled — bundled saves ~7% on average but occasionally single-line best-of-breed wins by 15%+ on total cost.
• Never accept a group renewal without seeing at least three market-tested alternative quotes. Even 'no-change no-claim' renewals frequently include hidden inflation adjustments that a benchmark exposes.

How PremierPMI places this cover

Group PMI placements live or die on the renewal negotiation. PremierPMI benchmarks all seven UK insurers 60 days before renewal, uses CPME switching to protect existing underwriting, and manages the claims narrative so a bad year doesn't automatically become a bad-priced renewal. Named senior contact at every insurer we place with.

Common questions

What is group health insurance?

A single master private medical insurance contract covering multiple employees under one policy number. The employer is the policyholder; employees (and optionally their dependants) are the covered lives. One renewal, one premium invoice, one benefit definition, one point of contact — mechanically far simpler than individual policies.

How many people do I need to qualify?

Two employees for Bupa, AXA, Aviva and WPA. Three for Vitality Business. Freedom and The Exeter also write groups from 2 in some cases. Below 2 lives, individual PMI is technically simpler though HMRC BIK treatment is similar.

What are the tax implications of group PMI?

Premium is a fully deductible business expense against corporation tax (HMRC BIM45560). Employees pay income tax on the P11D benefit-in-kind value (HMRC EIM21765). Employers pay Class 1A NIC on that BIK at 15% (2025/26). Salary sacrifice can reduce employer NIC but keeps BIK reporting under OpRA rules.

What's the difference between moratorium, MHD, FMU and CPME?

Moratorium — automatic 5-year look-back exclusion, no forms. Medical History Declaration (MHD) — each employee declares conditions, insurer prices exclusions individually. Full Medical Underwriting (FMU) — full questionnaire, most accurate. Continuous Personal Medical Exclusions (CPME) — the transfer mechanism used when switching insurer to preserve existing underwriting decisions.

Can I switch group insurer without my staff losing cover?

Yes — via CPME (Continuous Personal Medical Exclusions). The new insurer accepts the existing scheme's underwriting decisions as-is, so no one loses cover for existing conditions. This is why we recommend benchmarking annually — switching is far less painful than most HR teams assume.

What benefits are typically included?

Standard 2026 group PMI: hospital stays (day-patient and in-patient), consultant fees, diagnostic tests, cancer treatment, mental health cover, private GP, out-patient physio. Optional bolt-ons: dental, optical, EAP, virtual GP, second medical opinion, wellness programme, worldwide travel cover, health screening.

How is the premium calculated?

For small groups (community-rated): insurer's book average adjusted for your workforce age profile, postcode, industry SIC code, benefit level and excess. For larger groups (experience-rated): a formula combining 3-year loss ratio, book average, industry loading and medical inflation. We break down every renewal calculation with the insurer for our clients.

Can employees include their family?

Yes. Adding a partner typically costs 80–110% of the employee premium; each child 20–35%. Some corporate schemes include a partner-and-family option paid for by the employee via salary sacrifice; others include family cover as an employer-paid benefit for senior grades only.

When does my group scheme move from community to experience rating?

Threshold varies by insurer: Bupa typically 100 lives, AXA 100 lives, Aviva 150 lives, Vitality 250 lives. Once experience-rated, your own claims history drives renewal pricing directly — good in low-claims years, tough after big claim years. We manage the claims narrative at every renewal.

How long does it take to set up?

3–10 working days for schemes under 50 lives; 4–8 weeks for larger corporate schemes with employee communication rollouts. Whole-of-market benchmarking, quotes, underwriting, employee announcement pack, admin platform setup and go-live are all handled by us on your behalf.

PremierPMI is a UK private medical insurance broker specialising in whole-of-market placement across 10+ leading UK health insurers including Bupa, AXA Health, Aviva, Vitality, WPA, Freedom Health, The Exeter, General & Medical and National Friendly. FCA regulated (Tesha Family Ltd, FRN 1029667). Speak to a broker on 020 4525 0884, WhatsApp 020 8064 2273, or email contact@premierpmi.co.uk.