Mandatory Payrolling of Company Car Benefits from April 2027: What Employers Need to Know

From April 2027, HMRC will introduce one of the most significant payroll changes in years: company car and car fuel benefits must be reported through payroll, electronically, in real time. This marks the end of reporting these benefits via the traditional P11D process and forms part of HMRC’s wider move toward fully digital benefit reporting.

For employers and payroll teams, this shift is more than a procedural update, it’s a complete change in how taxable benefits are calculated, processed, and communicated to employees.

As an outsourced payroll provider, we’re here to break down what’s changing, why it matters, and how businesses can prepare.

What’s Changing from April 2027?

Company Car and Fuel Benefits Must Be Payrolled

From April 2027, employers will be required to calculate and tax company car and car fuel benefits through payroll, rather than reporting them retrospectively on P11Ds.

This means:

• The cash equivalent of the car benefit must be included in payroll calculations
• Income Tax will be deducted in real time
• Class 1A NICs will be reported and paid through the payroll process

Electronic Reporting Becomes Mandatory

Paper P11Ds are being phased out entirely. HMRC will require employers to submit benefit information electronically, through payroll software and Real Time Information (RTI).

Only a very small number of employers such as those ceasing trading mid‑year, will retain access to paper submissions.

End‑of‑year P11ds for Cars Will No Longer Exist

The familiar annual scramble to complete P11Ds for company cars will disappear. Instead, all reporting will be done during the year, aligned with payroll cycles.

Part of a Wider Phased Rollout

Company cars and fuel benefits are the first major category to be mandated, with other benefits following in later years. HMRC’s long‑term goal is full digital payrolling of all benefits in kind.

Why HMRC Is Making These Changes?

HMRC’s digital transformation aims to:

• Reduce employer admin
• Improve accuracy of tax deductions
• Remove reliance on estimated tax codes
• Ensure employees pay the correct tax at the correct time
• Eliminate millions of P11D submissions

Real‑time reporting is more transparent, more efficient, and reduces the risk of year‑end errors.

What This Means for Employers?

Payroll software must support payrolling of company car benefits

If your current system cannot handle benefit calculations, cash equivalents, or Class 1A NICs, you’ll need to upgrade or outsource.

HR and fleet teams must provide accurate car data

This includes:

• CO₂ emissions
• List price
• Fuel type
• Availability dates
• Changes during the year

Employees will see car benefit deductions on their payslips

This improves clarity and reduces unexpected tax bills.

P11D processes will need to be retired

Internal workflows, templates, and year‑end routines will need updating.

How Outsourced Payroll Providers Can Support the Transition?

As an outsourced payroll partner, we help employers navigate these changes smoothly by:

• Configuring payroll systems for mandatory benefit payrolling
• Automating company car calculations to ensure accuracy
• Managing Class 1A NICs within payroll cycles
• Providing compliance monitoring as HMRC updates guidance
• Supporting employee communication to explain the new deductions
• Replacing P11D workflows with fully digital processes

With April 2027 approaching, early preparation is essential.

Practical Steps Employers Should Take Now

• Review your current company car benefit processes
• Confirm your payroll software supports mandatory payrolling
• Ensure fleet data is complete and accurate
• Update internal policies and employee communications
• Consider outsourcing payroll to ensure full compliance
• Plan for the removal of P11Ds across your organisation

Final Thoughts

The mandatory payrolling of company car benefits is a major milestone in HMRC’s digital modernisation. While the change may feel significant, the long‑term benefits, reduced admin, improved accuracy, and clearer tax outcomes are substantial.

For employers, the key is preparation. For outsourced payroll providers, it’s an opportunity to deliver smarter, more efficient, and fully compliant payroll services.