Work out your take-home pay
Income tax, National Insurance and net pay for any UK salary, 2026-27.
When a benefit in kind is payrolled, the cash equivalent of that benefit is divided by the number of pay periods in the tax year and added to the employee's taxable pay at every payday [1]. A company car worth £5,200 a year, for example, adds £100 to a weekly payslip or £433.33 to a monthly one, and the Income Tax on that figure comes out of the same payrun as the salary [2].
For the employee, this is often the first sign that a benefit is being taxed in real time rather than through a tax code adjustment a year later. The payslip shows a higher taxable pay figure than the cash salary alone, and a correspondingly higher tax deduction, even though no extra cash has changed hands. Understanding why the numbers move helps an employee read the payslip correctly and helps an employer explain it.
This article sets out how the taxable amount of a payrolled benefit is calculated, exactly where it lands on the payslip, why National Insurance is handled differently from Income Tax, what the 50% cap on deductions does, and how mid-year changes to a benefit are absorbed into the remaining paydays.
Key takeaways
- The cash equivalent of a payrolled benefit is divided by the number of pay periods and added to taxable pay each payday, rounded to two decimal places [2].
- Only Income Tax is collected through the payroll; the employer's Class 1A National Insurance is still paid separately after the tax year [3].
- A payslip must show gross pay, deductions and net pay, but there is no legal requirement to itemise a payrolled benefit as a separate line [4].
- An employer cannot deduct more than 50% of an employee's cash pay in tax in a single pay period, which protects low-paid staff from a large benefit wiping out their wage [5].
- If a benefit value changes mid-year, the balance is spread evenly across the remaining paydays rather than corrected in a single lump [1].
What a payrolled benefit is
A benefit in kind is something an employer provides that has a cash value but is not paid as salary, such as a company car, private medical insurance or a gym membership. Around 920,000 people received a company car in the 2024 to 2025 tax year, making it the most common taxable benefit an employer has to account for [6]. Payrolling is the method of taxing that benefit through the payroll each pay period instead of reporting it on a year-end P11D [1].
The practical effect on a payslip is that the taxable pay figure rises above the cash salary. The benefit is not paid to the employee as money, so net pay does not increase by the benefit value, but the tax on the benefit is deducted from the cash wage. Reading the payslip correctly means separating the taxable pay figure (salary plus benefit) from the cash the employee actually receives. Clear, itemised payslips make that separation obvious rather than leaving the employee to reverse-engineer it.
How the taxable amount is worked out
The calculation is deliberately simple so it can run automatically in payroll software. The employer takes the cash equivalent of the benefit for the tax year, divides it by the number of pay periods, and adds that figure to the employee's taxable pay each payday [2]. The result is rounded down to two decimal places before it is applied [2].
The table below shows how the same £5,200 annual benefit lands differently depending on how often the employee is paid.
| Pay frequency | Pay periods | Benefit added each payday |
|---|---|---|
| Weekly | 52 | £100.00 [[2]](https://www.gov.uk/guidance/draft-guidance-and-legislation-to-aid-preparation-for-reporting-benefits-in-kind-in-real-time/how-to-report-a-benefit-in-kind-in-real-time) |
| Monthly | 12 | £433.33 [[2]](https://www.gov.uk/guidance/draft-guidance-and-legislation-to-aid-preparation-for-reporting-benefits-in-kind-in-real-time/how-to-report-a-benefit-in-kind-in-real-time) |
| Weekly (53-week year) | 53 | £98.11 [[2]](https://www.gov.uk/guidance/draft-guidance-and-legislation-to-aid-preparation-for-reporting-benefits-in-kind-in-real-time/how-to-report-a-benefit-in-kind-in-real-time) |
Handling a 53-week tax year
Some tax years contain an extra pay period for weekly-paid staff, producing 53 paydays instead of 52. HMRC's guidance instructs the employer to divide the cash equivalent by the actual number of pay periods, so in a 53-week year the benefit is divided by 53 rather than 52 [2]. This keeps the total taxed across the year equal to the full cash equivalent, and it is one of the edge cases that catches manual payroll out. An HMRC-recognised payroll platform applies the correct divisor automatically because the pay-period count is built into the pay calendar [1].
What the employee sees on the deduction side
The benefit itself is added to taxable pay, and the PAYE Income Tax is then worked out on the combined figure of cash pay plus the taxable benefit [7]. So the tax deduction on the payslip is larger than it would be on salary alone, but the extra tax is the tax on the benefit that would otherwise have been collected through the tax code [1]. The net result is that the employee pays the right tax on the benefit in the period they receive it, rather than a year later.
Where the benefit appears on the payslip
A UK payslip has to meet the itemised pay statement rules in the Employment Rights Act 1996, which require it to show gross wages, the amount and purpose of any variable and fixed deductions, and the net amount payable [8]. Where pay varies by hours worked, the payslip must also show the number of hours [8].
Notably, there is no legal requirement to display a payrolled benefit as its own separate line. The taxable amount is folded into the taxable pay figure, and HMRC has confirmed there are no plans to add benefit-in-kind information to the mandatory payslip content [4]. In practice many employers choose to show the benefit as a distinct, non-cash line so employees can see why their taxable pay exceeds their salary, which reduces payroll queries. Software that generates HMRC-compliant payslips can present the benefit transparently even though the law does not compel it.
Reading a payslip with a payrolled benefit
The clearest way to read such a payslip is to look for three numbers: the cash salary, the taxable pay figure, and the net pay. The taxable pay figure will be higher than the cash salary by the value of the payrolled benefit for that period. Net pay does not include the benefit as cash, because the benefit is a car or an insurance policy, not money, so the only cash effect is the extra tax deducted [1]. An employee comparing two months should expect the benefit portion to be identical each period unless the benefit value changed [2].
Why National Insurance is treated differently
A frequent point of confusion is that payrolling handles Income Tax but not National Insurance. When a benefit is payrolled, only the Income Tax is collected through the payslip. The employer's Class 1A National Insurance on the benefit is not collected each period; it is calculated on the full cash equivalent after the tax year and paid through the P11D(b) return [3].
Class 1A National Insurance is an employer-only charge, set at 15% of the cash equivalent for the 2026-27 tax year, and the employee pays no National Insurance on the benefit at all [9]. This is why a payrolled benefit changes the tax line on a payslip but never the employee National Insurance line. The table below separates the two treatments.
| Charge | Who pays | Collected through the payslip? |
|---|---|---|
| Income Tax on the benefit | Employee | Yes, added to taxable pay each period [[1]](https://www.gov.uk/guidance/payrolling-tax-employees-benefits-and-expenses-through-your-payroll) |
| Class 1A National Insurance | Employer only | No, paid after year end via P11D(b) [[3]](https://www.gov.uk/guidance/how-to-complete-forms-p11d-and-p11db) |
| Employee National Insurance | Not charged on the benefit | Not applicable [[9]](https://www.gov.uk/government/publications/cwg5-class-1a-national-insurance-contributions-on-benefits-in-kind/2026-class-1a-national-insurance-contributions-on-benefits-in-kind-termination-payments-and-sporting-testimonial-payments) |
Because the National Insurance liability survives payrolling, the year-end P11D(b) and the Class 1A payment remain due, with the P11D(b) filed by 6 July and the payment made by 22 July after the tax year [3]. Accountants managing this across many employers usually track it through a multi-client payroll dashboard so no scheme's Class 1A slips past the deadline.
The 50% limit that protects take-home pay
There is a safeguard built into payrolling to stop a large benefit from swallowing a small wage. An employer must not deduct more than 50% of an employee's cash pay in tax in any single pay period, a rule known as the overriding limit [5]. The limit matters most where a high-value benefit meets low pay, for example when an employee is on Statutory Sick Pay but still has a company car [5].
HMRC's worked example makes the effect concrete. An employee paid £1,000 a month with a car benefit adding £4,000 to taxable pay in September has total taxable pay of £5,000 and would normally owe £1,116.25 in tax that month [5]. The 50% limit caps the September deduction at £500, half of the £1,000 cash pay, and the uncollected £616.25 is carried forward to the next payday [5]. Any amount that still cannot be collected by the end of the tax year is picked up by HMRC through the P800 reconciliation or Simple Assessment process [5].
What happens when a benefit changes mid-year
Benefits are rarely static across a whole tax year. An employee might change company car, gain private medical cover, or lose a benefit partway through. When the cash equivalent changes, the employer works out what has already been payrolled for that benefit, deducts it from the revised annual amount, and spreads the remaining balance evenly across the paydays left in the year [1].
This avoids a single distorting correction. Instead of a one-off spike or refund, the payslip absorbs the change gradually, and the employee sees the benefit portion of their taxable pay adjust from the point of change onward [1]. Handling this cleanly across multiple employees and mid-year changes is one of the reasons employers move from spreadsheets to an HMRC-recognised payroll engine that recalculates the per-period figure automatically whenever a benefit value is updated.
Work out the take-home pay behind the payslip
To see how a payrolled benefit interacts with the rest of a payslip, an employer or employee can model the figures with the Moonworkers UK salary calculator, which applies the 2026-27 PAYE and National Insurance rules to any gross pay.
£ per month
e.g. 1257L, S1257L, BR, D0
S = Scotland · C = Wales · W1/M1 = non-cumulative
Enter a salary or hourly rate above
About this calculator
This calculator gives you a close estimate of your UK payroll deductions for 2026-27, using HMRC's exact percentage method with periodised thresholds. It handles the three tax territories, K codes with the 50% regulatory limit and its carry-forward, weeks 53, 54 and 56, the cumulative and W1/M1/X bases, student and postgraduate loans, and pension contributions on qualifying earnings. It still won't match your payslip to the penny in every case: it does not cover in-year tax code changes, payrolled benefits in kind, NI deferral across more than one employment, directors on the annual earnings period, or employer-level annual adjustments such as the Employment Allowance and the apprenticeship levy. Powered by the same engine as the Moonworkers Payroll API.
Frequently asked questions
Why might the result differ from my payslip?
This calculator uses your current gross pay and tax code to produce an estimate. K-code carry-forwards and weeks 53, 54 and 56 are handled, and the Year-to-date section reproduces a specific period exactly. What your employer may apply that this does not: a mid-year tax code change, benefits in kind processed through payroll, or NI deferral across more than one employment. For most employees on a standard tax code the difference is negligible.
What tax code should I enter?
Use the tax code shown on your most recent payslip or the PAYE Coding Notice (P2) from HMRC. If you're not sure, 1257L is the standard code for most employees resident in England, Wales, or Northern Ireland. Use S1257L for Scotland or C1257L for Wales if you pay Scottish or Welsh income tax.
Which NI category applies to me?
Most employees use Category A. Use M if you are under 21, H if you are an apprentice under 25, or C if you are over State Pension age. Your employer is responsible for assigning the correct category — if in doubt, check your payslip.
Which student loan plan am I on?
Your plan depends on when and where you studied. Plan 1 covers students who started before September 2012. Plan 2 is for English and Welsh students who started from September 2012 to July 2023. Plan 5 applies to English students who started from August 2023. Plan 4 covers Scottish students. You can check your plan at gov.uk or on your payslip.
What is the YTD cumulative PAYE mode?
HMRC's standard method calculates income tax on your total earnings to date each period, then subtracts tax already paid. If you're mid-year and want to see exactly what tax should be deducted in a specific period, expand the Year-to-date section and enter your running totals from previous periods only.
Conclusion
A payrolled benefit is not complicated once the payslip is read in the right order: taxable pay rises by the per-period value of the benefit, the Income Tax on that value is deducted from the cash wage, and net pay reflects only the extra tax rather than any extra cash. The benefit is a car or a policy, not money, so the payslip taxes it without ever paying it.
The design choices around payrolling all point the same way, towards collecting the right tax at the right time while protecting the employee. The 50% cap stops a benefit from erasing a wage, the mid-year spreading rule avoids sharp corrections, and the separation of Class 1A National Insurance keeps the employee's National Insurance line untouched. As mandatory payrolling arrives for the most common benefits from 6 April 2027, these payslip mechanics will become the standard way UK employees see their benefits taxed, so reading them fluently is worth the effort now [10].
Frequently asked questions
Does a payrolled benefit increase take-home pay?
No. The benefit is a non-cash item such as a company car or medical insurance, so it is added to taxable pay but not paid to the employee as money [1]. The only cash effect is that more Income Tax is deducted, because tax is now charged on the benefit through the payslip. Take-home pay is therefore slightly lower than salary alone, not higher.
Why is my taxable pay higher than my salary on the payslip?
Because a payrolled benefit is added to the taxable pay figure each pay period. The cash equivalent of the benefit is divided by the number of paydays in the year and included in taxable pay so the Income Tax can be collected in real time [2]. The gap between taxable pay and cash salary is the value of the benefit for that period.
Do employees pay National Insurance on a payrolled benefit?
No. Employees pay only Income Tax on a payrolled benefit. The National Insurance on a benefit in kind is Class 1A, an employer-only charge at 15% of the cash equivalent for the 2026-27 tax year, paid after the tax year through the P11D(b) [9]. The employee National Insurance line on the payslip is unaffected.
Can an employer stop payrolling a benefit if the tax is too high?
Yes, within limits. An employer must not deduct more than 50% of an employee's cash pay in tax in a period, and where a high-value benefit and low pay would breach that, the uncollected tax is carried forward or picked up by HMRC after year end [5]. The rule exists so an employee is never left with too little pay to live on.
