Understanding Company Health Insurance: Tax Deductibility vs Benefit-in-Kind

Private medical insurance (PMI) is a popular staff benefit for UK businesses, especially as NHS waiting lists remain a concern (check the latest NHS England Referral to Treatment data for up-to-date figures). But the tax treatment of company-paid health insurance is more complex than it first appears. Employers and employees face different rules, and mistakes can lead to unexpected tax bills or compliance problems.

Employer Corporation Tax: Is PMI Deductible?

For employers, the key question is whether the cost of providing PMI can be deducted from company profits for corporation tax purposes. The answer is usually yes—if the policy is provided wholly, exclusively, and necessarily for the purposes of the business. In practice, most group PMI schemes for staff are treated as a legitimate business expense. HMRC’s EIM21762 guidance covers this in detail.

However, this deduction for the company is separate from how the benefit is treated for employees. Even if the employer claims the cost against corporation tax, the employee may still face a personal tax charge.

Employee Benefit-in-Kind: What Does It Mean?

When a company pays for an employee’s medical insurance, HMRC generally treats this as a taxable benefit-in-kind (BIK). Unless the policy only covers emergency treatment while working abroad, most PMI counts as a BIK. This means:

• The value of the premium is reported to HMRC (currently via P11D, but see below for changes).

• The employee pays income tax on the value of the benefit.

• The employer pays Class 1A National Insurance on the premium.

From 6 April 2027, HMRC is phasing in mandatory payrolling for certain benefits, including medical benefits. This will mean real-time reporting and tax deductions via payroll, rather than the annual P11D process. Employers should check the latest HMRC payrolling guidance to prepare their payroll systems and processes.

Messy Example: When Tax and Reporting Go Wrong

Imagine a small tech company, "Codewise Ltd", offers PMI to all staff through a group policy with Aviva. The finance manager assumes the premiums are just a business expense and forgets to report them as a benefit-in-kind. Six months after year-end, employees start receiving unexpected tax bills from HMRC. One employee, who joined mid-year, is particularly confused—their P11D shows a full year’s premium, not just the months they were covered. The company also faces a penalty for missing Class 1A NIC payments. Sorting this out involves back-and-forth with HMRC, payroll corrections, and some very frustrated staff.

Practical Steps for Employers

1. Review your policy: Check annually that your PMI policy matches business needs and is compliant with HMRC rules.

2. Update payroll systems: Make sure your payroll software can handle payrolling of benefits ahead of the 2027 changes.

3. Communicate clearly: Issue written notifications to staff explaining that PMI is a taxable benefit and may affect their tax code or annual bill.

4. Keep records: Save policy documents, provider communications, and evidence of staff notifications. This helps if HMRC or an employee queries your process.

Questions to Ask HR, Insurer, Broker, or Doctor

• Does our PMI policy cover only business travel, or does it include private treatment?

• How are premiums reported to HMRC—via P11D or payroll?

• What is the process if I join or leave part-way through the year?

• What exclusions apply (e.g., pre-existing conditions, chronic illnesses)?

• If I have a pre-existing condition, how will it be treated under our policy?

• How can I appeal if a claim is denied?

Disputes and Exclusions: Where Problems Arise

Disagreements often crop up around pre-existing conditions and policy exclusions. Most UK PMI policies (from providers like Bupa, AXA Health, Aviva, Vitality, WPA) cover acute conditions but exclude chronic ones. Underwriting type matters:

Chronic vs acute disputes are common. For example, an employee with asthma may find their claim for a chest infection is denied because the insurer classifies it as a chronic condition linked to their asthma. If you disagree with a decision, the Financial Ombudsman can review PMI complaints, including those about pre-existing conditions and exclusions.

Checklist: Avoiding PMI Claim Disputes

• Request and read the full list of policy exclusions every year.

• Ask HR to confirm your underwriting type and any waiting periods.

• Keep a record of all health disclosures made at the start of your policy.

• Get written confirmation from your insurer if you’re unsure about cover for a specific condition.

• If a claim is denied, ask for the reason in writing and follow the insurer’s complaints process.

How Caira by Unwildered Can Help

Caira by Unwildered lets you upload policy documents, letters, screenshots, emails, medical notes and bills. It can compare policy wording, organise your evidence, draft questions or emails, and help you understand possible next steps—any time, day or night. No question is too basic.

Useful Starting Points

• GOV.UK: Employer expenses and benefits (medical insurance)

• GOV.UK: Medical or dental treatment and insurance

• HMRC: Mandatory payrolling guidance

• NHS England: Referral to Treatment data

• Financial Ombudsman: Private medical and dental insurance complaints

This article is general information, not legal, tax, insurance, financial or medical advice.