Comparing Health Insurance at the Big Four: What Actually Matters?
Private medical insurance (PMI) is a core benefit at Deloitte, PwC, EY and KPMG. While each firm promotes its package as a draw for talent, the reality is more nuanced. Most Big Four employees receive group PMI, but the details—like what’s covered, what’s excluded, and how much tax you pay—can be confusing. This guide gives you a framework to compare options, understand the pitfalls, and take practical steps if things go wrong.
How the Big Four Structure Their PMI
Firm | Insurer/Provider | Underwriting Type | Common Exclusions | Employee Cost (Tax Only) | Tax Reporting |
|---|---|---|---|---|---|
PWC | AXA Health | Moratorium | Pre-existing, chronic | £0–£15/month | P11D/Benefit in Kind |
Deloitte | Bupa | Full Medical Underwriting | Chronic, alternative therapies | £0–£17/month | P11D/Benefit in Kind |
EY | Vitality | Moratorium | Pre-existing, dental, vision | £0–£14/month | P11D/Benefit in Kind |
KPMG | Aviva | Moratorium | Chronic, some mental health | £0–£16/month | P11D/Benefit in Kind |
Source: Firm benefits handbooks (2023/24), insurer summary documents. Actual tax cost depends on salary and marginal rate.
Understanding Underwriting and Exclusions
Most Big Four schemes use a moratorium approach. This means any medical condition you’ve had symptoms, treatment or advice for in the last five years is excluded—unless you’ve been symptom-free for two years. Deloitte often uses full medical underwriting, which requires a health questionnaire and lists specific exclusions upfront.
Disputes often arise around:
Pre-existing conditions: Was your claim denied because of a past issue?
Chronic vs acute conditions: PMI usually covers acute (short-term, treatable) issues, but excludes chronic (long-term, managed) ones. The line isn’t always clear.
A Realistic Example: When Policy Wording Gets Messy
Suppose you work at EY and develop knee pain. You saw your GP for a similar issue three years ago, but it resolved after physio. Now, the pain is back, and your specialist recommends surgery. You submit a claim, but the insurer says it’s a pre-existing condition under the moratorium. You dig out your old GP letters, showing you were symptom-free for over two years. After several emails and a phone call, the insurer agrees to cover the operation, but not ongoing physio, arguing it’s now a chronic management issue. You’re left wondering: what exactly is covered, and how do you challenge decisions?
Practical Steps: What to Do If Your Claim Is Denied
Gather evidence: Save all policy documents, emails, referral letters, and medical notes. Screenshots of app messages and insurer web pages can be useful.
Ask your HR team or insurer:
What underwriting method applies to my policy?
Which conditions are excluded, and for how long?
How does the insurer define chronic vs acute?
What is the formal complaints process?
Challenge the decision: Request the insurer’s clinical rationale and a copy of the relevant policy wording. You can use a simple email, such as:
Dear [Insurer],
I am writing to appeal the denial of my claim (ref: [123456]). Please provide the clinical rationale and the policy wording you relied on. I may escalate this to the Financial Ombudsman Service if unresolved.
Yours sincerely,
[Your Name]Escalate if needed: If you’re unhappy after eight weeks or a final response, you can complain to the Financial Ombudsman Service. They handle disputes about pre-existing conditions, exclusions, and claims handling.
Tax and Payrolling: What’s Changing?
Employer-paid medical insurance is usually a taxable benefit in kind. For now, it’s reported on your P11D, and you pay tax via PAYE or self-assessment. HMRC has announced that mandatory payrolling of certain benefits, including medical benefits, will be phased in from 6 April 2027. This means the taxable value will appear on your payslip, and P11Ds will be phased out for these benefits. Check with your HR or payroll team for the latest on how your firm is preparing.
Is PMI Worth It? NHS Waiting Times and Value
With NHS waiting lists under pressure (see NHS England’s latest Referral to Treatment data), many see PMI as a way to access faster treatment. However, not all policies are equal. Check what’s included—some policies exclude mental health, dental, or outpatient care. The main providers for large employers are Bupa, AXA Health, Aviva, Vitality and WPA, but the real differences are in the details.
Useful Questions to Ask Before Relying on Your Cover
What is the claims process and timeline?
Are dependants or partners covered, and at what cost?
What happens if I leave the firm—can I continue the policy?
How are disputes handled, and who can help me escalate?
Keeping Evidence: Why It Matters
Always keep copies of your policy, insurer letters, emails, and any medical notes. If you need to escalate a complaint, detailed evidence makes a real difference. If you’re struggling to organise paperwork or understand policy wording, Caira by Unwildered can help: upload documents, letters, screenshots, emails, medical notes and bills. Caira can compare policy wording, organise your evidence, draft questions or emails, and help you understand your next steps 24/7—no question is too basic.
Useful Starting Points
This article is general information, not legal, tax, insurance, financial or medical advice.
