Mandatory Payrolling of Benefits in Kind 2027: A UK Employer's Compliance Playbook

Introduction: The Shift to Real-Time Benefits Reporting

From 6 April 2027, the UK tax landscape changes fundamentally for employers providing benefits in kind (BiKs). The long-standing practice of reporting these benefits annually on P11D forms will end for most common benefits, replaced by real-time reporting through the Full Payment Submission (FPS) system. This guide explains everything you need to know to prepare for mandatory payrolling benefits in kind, covering the transition timeline, affected benefits, registration steps, payroll system updates, employee communication, and handling corrections.

Whether you provide company cars, private medical insurance, or other taxable perks, this guide will help you navigate the new requirements and avoid penalties.

Understanding the Mandate: What Changes from April 2027

From 6 April 2027, employers must report the following benefits in kind through payroll in real time:

• Company cars
• Car fuel
• Vans
• Van fuel
• Employer-provided medical benefits

This means these BiKs will be included in the FPS, alongside salary and other pay elements. The move aligns BiK reporting with PAYE real-time information, eliminating the need for separate P11D submissions for these benefits. HMRC expects this to reduce administrative burdens and manual compliance checks.

Additionally, from the same date, employers may voluntarily payroll other non-mandatory BiKs, such as employment-related loans and accommodation. This voluntary extension offers an opportunity to further streamline reporting.

Transition Timeline: From Voluntary to Mandatory Payrolling

The UK government has set out a phased timeline to ensure a smooth transition. Key milestones include:

• 5 April 2026: Closure of the current voluntary service for payrolling BiKs.
• June 2026: Announcement of the phased introduction of mandatory payrolling.
• July 2026: Draft primary legislation published.
• November 2026: Registration opens for voluntary payrolling of non-mandatory benefits.
• 6 April 2027: Phase 1 mandatory payrolling begins (cars, car fuel, vans, van fuel, medical benefits).
• April 2028: Phase 2 mandatory payrolling covers most other benefits.

Draft legislation for classic car valuation changes is expected in early 2026, with final legislation aligned to the 2026 Finance Bill. Stakeholder engagement and guidance updates will occur between February 2026 and April 2027.

Step 1: Assess Your Current Benefits Portfolio

Begin by listing all benefits in kind you currently provide. Identify which are mandatory (cars, fuel, vans, medical) and which are optional (loans, accommodation, etc.). For each benefit, determine the current valuation method and data availability.

Consider the following:

• Company cars: Record CO2 emissions, list price, and any capital contributions.
• Car fuel: Track fuel type and the appropriate fuel benefit charge.
• Vans: Note whether private use is significant.
• Medical benefits: Document the annual premium paid per employee.

This inventory will form the basis for your payroll data feeds.

Step 2: Update Payroll Systems for Real-Time Reporting

Your payroll software must be capable of reporting BiKs through the FPS. HMRC will release updated technical specifications for software providers in autumn 2026. Ensure your payroll provider is aware of these changes and plans to implement the new FPS fields.

Key requirements include:

• Ability to include BiK values in each pay period's FPS.
• Capture and report Class 1A National Insurance contributions via RTI using data items 350 and 351.
• Handle end-of-year adjustments and corrections.

If you use an in-house system, allocate resources for development and testing. For outsourced payroll, confirm your provider's upgrade timeline.

Step 3: Register for Voluntary Payrolling (If Applicable)

For mandatory BiKs, no registration is required — the legal obligation applies automatically from April 2027. However, if you wish to payroll non-mandatory benefits (e.g., loans, accommodation), you must register voluntarily.

Registration opens in November 2026, with a deadline of 5 April 2027. To register, you'll need to notify HMRC through your payroll system or online services. HMRC will then automatically remove these BiKs from employees' tax codes for April 2027.

Step 4: Communicate with Employees

The shift from paying tax on benefits in arrears to real-time taxation may confuse employees. They may perceive that they are being taxed twice, as their tax code will change and they'll see deductions from their pay. Clear communication is essential.

Prepare a communication plan that explains:

• Why the change is happening (simplification, alignment with PAYE).
• How their take-home pay may be affected (tax deductions will be spread across the year).
• That underpayments from previous years will still be collected via their tax code.

Provide examples tailored to your benefit offerings. For instance, an employee with a company car will see a monthly deduction based on the annual cash equivalent divided by pay periods.

Step 5: Prepare for Corrections and Adjustments

Even with careful planning, errors and changes will occur. HMRC has outlined procedures for corrections:

In-Year Corrections

If you discover an error during the tax year, make the correction in a future FPS submission. If that's not possible, use the end-of-year BiK update process. Report errors as soon as possible.

End-of-Year Corrections

After the tax year ends, you must revise the final FPS. The deadline is expected to be before 19 July following the tax year end. Pay any additional tax and Class 1A NICs by 22 July (or 19 July if paying by post) to avoid penalties and interest. If you've already issued P60s to affected employees, you must issue revised P60s.

HMRC does not plan to allow carry-forward of corrections to previous tax years, so timely action is critical.

Practical Examples: How Payrolling Works

Example 1: Medical Benefit

An employee receives a private medical insurance policy costing £1,200 per year. If paid monthly, the taxable benefit per pay period is £100 (£1,200 ÷ 12). Income tax is deducted via PAYE based on the employee's tax band. The employer pays Class 1A NICs at the relevant rate (currently 15%) on the annual value.

If the actual cost differs from the estimate, an end-of-year adjustment is made via the final FPS.

Example 2: Classic Car

For classic cars (aged 15 years or more with a market value over £15,000), the valuation method changes from April 2027. Currently, the market value is determined at the end of the tax year. From April 2027, it will be determined at the beginning of the tax year. Draft legislation is expected in early 2026, so monitor guidance.

Common Pitfalls to Avoid

• Missing registration deadline for voluntary BiKs: If you want to payroll non-mandatory benefits, register by 5 April 2027.
• Inadequate payroll system updates: Ensure your software is FPS-ready before April 2027.
• Poor employee communication: Failing to explain the change can lead to dissatisfaction and queries.
• Incorrect valuation of classic cars: Adjust your processes to use start-of-year values.
• Delayed corrections: Submit corrections promptly to avoid penalties.

FAQ

Do I need to register for mandatory payrolling?

No. Mandatory payrolling applies automatically from 6 April 2027. Registration is only needed if you wish to voluntarily payroll non-mandatory BiKs.

What happens to P11D forms?

For benefits included in mandatory payrolling, P11D forms will no longer be required for those items. However, you may still need to file P11Ds for other benefits not yet mandated (until Phase 2 in April 2028).

How will Class 1A NICs be reported?

Class 1A NICs will be reported via RTI using data items 350 and 351 in the FPS. Employers will pay these NICs annually, but the data will be captured in real time.

What if an employee leaves mid-year?

You should include the benefit value up to the leaving date in the final FPS for that employee. Any overpayment of tax will be reconciled through the employee's tax return.

Will there be a penalty for non-compliance?

Yes, failure to comply may result in penalties. Ensure your systems and processes are ready before April 2027.

Next Steps: Prepare Now

The transition to mandatory payrolling is a significant change. Start by reviewing your benefits inventory and payroll system capabilities. Engage with your payroll provider early to ensure their software will be updated. Communicate with employees well in advance to manage expectations.

To streamline your compliance efforts, consider leveraging AIGovHub's Continuous Compliance Monitoring (CCM) module. With ERP connectors and automated rule engines, it can help you monitor payroll data, detect anomalies, and ensure your FPS submissions are accurate and timely. The AI-native engine can flag potential issues before they become penalties, giving you peace of mind.

For more guidance on payroll compliance and other regulatory changes, explore AIGovHub's resources. Start your preparation today to ensure a smooth transition to mandatory payrolling in 2027.

This content is for informational purposes only and does not constitute legal advice.