Understanding the Real ROI of Company Health Insurance
With NHS waiting lists remaining high (see the latest NHS England Referral to Treatment data), many UK employers are considering or reviewing company health insurance. But what does the return on investment (ROI) really look like in practice? Beyond the sales pitch, the value of company health insurance depends on how it affects absence, retention, and productivity—plus how well you navigate tax, reporting, and policy disputes.
Tax and Reporting: What’s Changing?
Employer-provided medical or dental insurance is usually a taxable benefit. Employees typically pay tax on the premiums, unless an exemption applies. Employers also have National Insurance and reporting duties. HMRC’s current position is that mandatory payrolling of benefits in kind—including medical benefits—will be phased in from 6 April 2027. This will gradually replace the old P11D forms for these benefits.
In practice, this means:
Employees will see the value of their health insurance benefit reflected in their payslips and tax codes.
Employers will need to update payroll systems and employee communications.
There may be confusion during the transition, especially for staff who have never seen these benefits payrolled before.
Action Steps for Employers
Audit how you currently report health insurance and other benefits.
Talk to your payroll provider or software supplier about the upcoming changes.
Inform employees about how payrolling will affect their net pay and tax codes.
Check HMRC’s latest guidance on payrolling and medical benefits.
ROI in Practice: Absence, Retention, and Productivity
The business case for company health insurance often rests on three pillars:
Reducing absence: Quicker access to treatment can mean employees return to work sooner after illness or injury.
Improving retention: Health insurance is a valued benefit, especially for staff with families or health concerns. It can tip the balance when people consider staying or leaving.
Boosting productivity: Employees who feel supported and have fewer health-related distractions may be more focused at work.
But the real ROI depends on your workforce, the policy’s details, and how well it’s used. For example, if most claims are denied due to exclusions or pre-existing conditions, or if staff don’t understand how to claim, the perceived value drops fast.
A Messy, Realistic Example
Imagine a 50-person tech firm in Manchester. They introduce company health insurance hoping to cut sick days and keep key staff. In year one, three employees use the policy for knee surgery, skipping a 16-week NHS wait (according to NHS England RTT data at the time). Two others are denied cover for mental health support due to policy exclusions. One employee is shocked by a smaller-than-expected payslip after the benefit is payrolled. HR spends hours untangling the tax coding and handling a complaint to the Financial Ombudsman about a pre-existing condition exclusion. The result? Some staff are delighted, some are frustrated, and HR learns the value of clear communication and evidence-keeping.
Common Disputes and Evidence to Keep
Disputes often arise over:
Pre-existing condition exclusions (especially with moratorium underwriting)
Whether a condition is classed as acute or chronic
Policy wording ambiguities (e.g. mental health, cancer cover limits)
Provider network restrictions
Keep:
All policy documents and renewal letters
Emails or screenshots of claim decisions
Medical notes and bills
Records of conversations with the insurer or broker
If you need to challenge a denied claim, refer to the relevant policy wording and keep your questions specific. The Financial Ombudsman can review private medical and dental insurance complaints, including those about pre-existing conditions and exclusions.
Questions to Ask
HR: How will payrolling affect my payslip and tax code?
Insurer/Broker: What are the main exclusions, and how are pre-existing conditions handled?
Doctor: What medical evidence do I need for a claim?
Insurer: How do you define acute vs chronic conditions?
How Caira by Unwildered Can Help
Managing company health insurance can be confusing, especially when dealing with tax, claims, or policy wording. Caira by Unwildered lets users upload policy documents, letters, screenshots, emails, medical notes and bills. It can compare wording, organise your evidence, draft questions or emails, and help you understand next steps 24/7—no question is too basic. It won’t give legal, tax, financial, medical or regulated insurance advice, but it can make the process clearer and less stressful.
Useful Starting Points
This article is general information, not legal, tax, insurance, financial or medical advice.
