Income Tax for Employees in 2026: PAYE, Bands, NI and Planning Guide

For most employed individuals, income tax is deducted automatically through the PAYE system and requires little active management. But the detail matters — particularly for higher earners, those with multiple income sources, and internationally mobile individuals who may have complicated tax positions. This guide explains how the UK income tax system works for employees in 2026.

How PAYE Works

Pay As You Earn (PAYE) is the system by which employers deduct income tax and National Insurance from employees' pay before it is received. The employer uses a tax code provided by HMRC to calculate how much to deduct from each payment.

The employer pays the tax to HMRC on behalf of the employee, typically monthly. At the end of each tax year (5 April), the employer issues a P60, which shows the total pay received and total tax deducted in that year. The P60 is used to complete a Self-Assessment return if one is required, or to check that the correct amount of tax has been deducted if not.

The PAYE system is designed to collect roughly the right amount of tax across the year, spreading the liability over each pay period. In practice, there are frequently discrepancies — underpayments collected in future years, or overpayments repaid — particularly where income sources change, employees start or leave employment mid-year, or benefits in kind are included.

Income Tax Bands and Rates 2026/27

The income tax bands for the 2026/27 tax year are as follows:

• Personal Allowance: the first £12,570 of income is tax-free. The personal allowance is not a "band" in the sense that income in it is taxed at a special rate — it is simply tax-free.
• Basic rate (20%): income between £12,571 and £50,270.
• Higher rate (40%): income between £50,271 and £125,140.
• Additional rate (45%): income above £125,140.

These thresholds are frozen until April 2031, as announced in previous Budgets. Wage inflation means that a growing number of people are being pulled into the higher-rate band as their pay rises — a process known as "fiscal drag."

The 60% effective rate trap (£100,000–£125,140): this is the most important — and least well understood — feature of the UK income tax system for higher earners. The personal allowance of £12,570 is tapered away for those earning between £100,000 and £125,140: for every £2 of income above £100,000, £1 of personal allowance is lost. This means that the effective marginal rate of income tax on income in the £100,000–£125,140 range is 60% — 40% higher-rate tax plus 20% from the loss of the tax-free allowance.

An employee who earns exactly £125,140 has no personal allowance remaining and pays 40% tax from £1 of income. Any income above £125,140 is taxed at the additional rate of 45%.

The planning implication of the 60% effective rate band is substantial: pension contributions of up to £25,140 (reducing income from £125,140 to £100,000) produce income tax relief at an effective rate of 60%. This is one of the most efficient uses of pension contributions available in the UK tax system.

National Insurance Contributions 2026/27

Employee Class 1 NI:

• 0% on earnings up to £12,570 per year (the Primary Threshold).
• 8% on earnings between £12,570 and £50,270 (the Upper Earnings Limit).
• 2% on earnings above £50,270.

Employer Class 1 NI: The employer pays NI on top of the employee's gross pay. Following changes announced in the Autumn Budget 2024 and effective from April 2025:

• Employer NI rate: 15% on earnings above the Secondary Threshold (reduced from £9,100 to £5,000 per year).

The combination of the higher employer NI rate and the lower Secondary Threshold substantially increased the cost of employment from April 2025, particularly for part-time and lower-earning employees. For employees considering salary sacrifice pension contributions, the employer saving on NI is more significant than it was previously.

Understanding Your Tax Code

HMRC issues a tax code to each employee. The code is communicated to the employer and used by payroll to calculate PAYE deductions. Common codes include:

• 1257L: the standard code for an individual with the full personal allowance (£12,570) and no adjustments. The "L" suffix indicates eligibility for the basic personal allowance.
• BR: all income taxed at 20% basic rate, with no personal allowance applied to that source of income. This code is applied where HMRC believes the personal allowance has been fully used against another income source (e.g., a second job, or another pension income).
• D0: all income taxed at 40% — applied where the personal allowance and basic-rate band are exhausted before reaching this employment.
• W1/M1: "week 1/month 1" basis — an emergency or temporary code applied when HMRC does not have full information about the year's income. Tax is calculated on each pay period in isolation rather than cumulatively.
• K prefix codes: a K code indicates negative allowances — the individual has untaxed income (such as an underpayment being collected, or large benefits in kind) that HMRC is collecting through PAYE.

Employees should check their tax code at the start of each tax year and after any change in circumstances. HMRC's online account allows you to view and, in some cases, correct tax codes without speaking to a helpline. An incorrect code — particularly one that persistently under-deducts — results in a year-end underpayment demand that can be a surprise.

Benefits in Kind: P11D and PSA

If an employer provides taxable benefits — a company car, private medical insurance, interest-free loans above £10,000, accommodation, or other perks — these are generally reported on form P11D and are taxable as employment income. The employee pays income tax on the value of the benefit; the employer pays Class 1A National Insurance at 15% (the rate that applies from 6 April 2025, increased from 13.8%).

Alternatively, benefits can be included within a PAYE Settlement Agreement (PSA), under which the employer settles the tax liability on the employee's behalf — useful for minor irregular benefits where individual P11D reporting would be disproportionate.

The company car benefit is calculated using the car's P11D value and a CO2-based percentage. Zero-emission electric cars had a 2% benefit-in-kind rate in 2024/25 and 2025/26, rising to 4% in 2026/27, 5% in 2027/28, and higher in subsequent years — still substantially lower than petrol or diesel equivalents, which attract rates of 25–37%. For higher earners considering electric company cars, the benefit-in-kind advantage over private ownership remains significant.

When Self-Assessment Is Required

Employees taxed wholly through PAYE are not required to file a Self-Assessment return unless one or more of the following applies:

• Their total income exceeds £100,000 (to allow HMRC to apply the personal allowance taper correctly and collect tax on income in the 60% effective rate band).
• Their total income exceeds £150,000 (a separate HMRC filing trigger even for straightforward PAYE-only taxpayers).
• They have untaxed income (rental income over £2,500, foreign income over £300, investment income above the savings and dividend allowances).
• They are a company director.
• They have capital gains above the annual exempt amount (£3,000 in 2026/27).
• They need to claim tax relief on pension contributions, charitable donations (Gift Aid on higher-rate relief), or other allowances not automatically processed by PAYE.
• The High Income Child Benefit Tax Charge applies to them.

If in doubt, HMRC's online "check if you need to file a tax return" tool provides a structured answer based on individual circumstances.

Key Planning Steps for Higher Earners

Pension contributions to protect the personal allowance: as noted above, contributing up to £25,140 to a pension (bringing income from £125,140 to £100,000) attracts effective relief of 60%. Even if you are not at this threshold, contributions attract 40% or 45% relief on the higher-rate and additional-rate portions.

Salary sacrifice: where an employer offers salary sacrifice pension contributions, the employee reduces their contractual salary in exchange for higher employer pension contributions. The employee saves income tax and NI; the employer saves NI at 15%. For basic-rate taxpayers, the NI saving through salary sacrifice can be more valuable than the tax saving from a personal pension contribution.

Childcare considerations: the High Income Child Benefit Tax Charge applies to any individual earning over £60,000 who lives with a partner receiving Child Benefit. The charge is 1% of the Child Benefit for every £200 of income above £60,000, with the full amount repaid at £80,000. Pension contributions that reduce income below £60,000 can eliminate or reduce this charge.

Charitable giving — Gift Aid: basic-rate tax on donations made under Gift Aid is reclaimed by the charity. Higher and additional-rate taxpayers can claim back the difference between their marginal rate and 20% through Self-Assessment. A £1,000 donation costs a higher-rate taxpayer £600 after tax relief.

How Global Investments Can Help

Global Investments works with employees at all stages of their careers — including high earners navigating complex tax codes, benefits programmes, and internationally mobile assignments — to ensure their tax position is managed efficiently and that savings and investments are structured to maximise after-tax returns. Contact our team for a confidential discussion.