Health Cash Plans as a Benefit in Kind: Tax Implications 2026/27

Health cash plans have become one of the most popular employee benefits in the UK. They let workers claim back everyday medical costs — dental check-ups, optician visits, physiotherapy, and more — up to a fixed annual limit. However, when an employer funds the plan, HMRC treats the premiums as a benefit in kind (BIK), which means they attract income tax and National Insurance contributions. Understanding exactly how the tax works in 2026/27 helps you judge whether the benefit is genuinely worthwhile — or whether a salary sacrifice arrangement could make it more efficient.

What Is a Health Cash Plan?

A health cash plan is an insurance-style product through which policyholders can reclaim a proportion of everyday healthcare costs up to an annual cap. Common providers include Healthshield, Simplyhealth, and Westfield Health. Plans typically cover:

• NHS dental treatment and private dentistry
• Optical expenses (eye tests, glasses, contact lenses)
• Physiotherapy and complementary therapies
• GP appointments and specialist consultations
• Hospital stays (daily cash benefit)
• Mental health support sessions

Premiums vary widely depending on the level of cover chosen, but employer group schemes often range from around £100 to £600 per employee per year.

How BIK Tax Works on Health Cash Plans

HMRC's P11D rules define a benefit in kind as any non-cash benefit provided to an employee by reason of their employment. Because the employer is paying the insurance premium, the employee receives something of monetary value — so it is taxable.

The cash equivalent of the benefit is simply the annual premium the employer pays. This amount is treated as if it were extra salary and taxed at your marginal income tax rate. In 2026/27 the rates are:

Employee Class 1 National Insurance also applies to BIK income at:

• 8% on earnings between £12,570 and £50,270
• 2% on earnings above £50,270

Calculating Your Tax Liability: Worked Examples

Example 1 — Basic-Rate Taxpayer

Sarah earns £32,000 and her employer pays £240/year for her health cash plan.

• BIK value: £240
• Income tax at 20%: £48
• Employee NI at 8%: £19.20
• Total extra tax cost: £67.20/year (£5.60/month)

Sarah's employer also pays Class 1A NI at 13.8% on the £240 = £33.12.

Example 2 — Higher-Rate Taxpayer

James earns £65,000 and his employer pays £360/year for a premium-level cash plan.

• BIK value: £360
• Income tax at 40%: £144
• Employee NI at 2% (earnings already above £50,270): £7.20
• Total extra tax cost: £151.20/year (£12.60/month)

His employer pays Class 1A NI at 13.8% on £360 = £49.68.

These figures illustrate why higher earners need to be more cautious — the gross benefit of the plan must clearly exceed its after-tax cost to make it worthwhile.

Employer Obligations: Class 1A NI and Reporting

Employers must report health cash plan BIK amounts to HMRC either via P11D(b) (if not payrolling) or through their payroll software. Key deadlines:

• P11D submission: 6 July following the end of the tax year
• Class 1A NI payment: 19 July (22 July if paying electronically)

Employers pay Class 1A NI at 13.8% on the total cash equivalent of all benefits reported. For a workforce of 50 employees each receiving a £300/year plan, the employer's Class 1A bill on that benefit alone is £2,070.

Note: The Employment Allowance of £10,500/year offsets employer Class 1 NI but does not reduce Class 1A NI on benefits in kind.

Salary Sacrifice and Optional Remuneration Arrangements

Before April 2017, salary sacrifice was a highly tax-efficient way to provide health cash plans. An employee would agree to reduce their gross salary by the premium amount, and the employer would fund the plan instead. Both employee and employer paid less NI, and the employee paid less income tax.

The Optional Remuneration Arrangement (OpRA) rules introduced in April 2017 largely closed this loophole for most benefits. Under OpRA, the taxable value of a BIK provided through salary sacrifice is the higher of:

1. The cash equivalent (normal BIK rules), or
2. The salary given up

For health cash plans, this typically means the tax saving from salary sacrifice is now minimal for new arrangements. However, plans that were in place before 6 April 2017 may have been grandfathered under transitional rules — though most such protections have since expired.

Some employers still operate salary sacrifice for health cash plans, and there can be a small NI saving where the salary foregone is less than or equal to the cash equivalent. Always obtain confirmation from your employer's HR or payroll team before assuming any NI benefit applies.

Employee-Paid Plans: No BIK, No Tax Relief

If you take out a health cash plan personally and pay the premiums yourself, there is no BIK issue — HMRC simply does not get involved at that stage. However, you also cannot claim income tax relief on personal health insurance premiums (unlike pension contributions).

When you make a claim and receive a cash payment from the plan, this is also not taxable — it is a reimbursement for medical expenses, not income. So personal plans are clean from a tax perspective, but they offer no upfront tax efficiency either.

Comparing the After-Tax Value

Practical Steps for Employees

1. Check your P11D or payslip. If your employer provides a health cash plan, look for the cash equivalent on your P11D or as a separate line in your payrolled benefits. Verify the figure matches the actual premium.

2. Understand your tax code. HMRC often adjusts your PAYE tax code to collect BIK tax spread over the year. A reduction in your Personal Allowance (for example, a 1257L code becoming 1017L) usually reflects BIK deductions.

3. Calculate whether the benefit outweighs the cost. Use the worked examples above or our

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4. Ask about salary sacrifice. Even if OpRA limits the income tax saving, there may still be a small employer NI saving that your employer passes on as a higher plan limit.

5. Report accurately on Self Assessment. If you complete a Self Assessment return, include BIK values in the employment income section. Failure to declare can result in penalties and interest.