How UK Income Tax and National Insurance Work in 2026/2027
Understanding your payslip is essential when evaluating job offers, negotiating compensation, or considering career transitions. In the UK, employment income is subject to deductions under the Pay As You Earn (PAYE) system administered by HM Revenue and Customs (HMRC).
Personal Allowance
You earn up to £12,570 per year completely tax-free. If your annual income exceeds £100,000, your personal allowance reduces by £1 for every £2 earned above £100k, reaching zero at £125,140.
Basic Rate Band
Income within this bracket is taxed at 20%. For example, an individual earning £35,000 pays 20% only on the £22,430 portion that exceeds the £12,570 Personal Allowance.
Higher Rate Band
Earnings above £50,270 are subject to the 40% higher rate. Tax relief on workplace pension contributions also matches this rate at 40%.
Additional Rate Band
All earnings above £125,140 are taxed at 45%. No personal allowance is available for earners in this top bracket.
National Insurance (Class 1 Contributions)
Employees pay Class 1 National Insurance contributions to qualify for the UK State Pension and other statutory welfare benefits:
- 8% Main Rate: Applied on annual earnings between the Primary Threshold (£12,570 per year or £1,048 per month) and the Upper Earnings Limit (£50,270 per year).
- 2% Upper Rate: Applied to all earnings exceeding £50,270 per year.
Workplace Pension & Salary Sacrifice Advantages
Under UK auto-enrolment legislation, eligible employees are enrolled into a qualifying workplace pension scheme where the statutory minimum total contribution is 8% of qualifying earnings (typically 5% from the employee and 3% from the employer). When structured through Salary Sacrifice, employee pension contributions reduce both Income Tax and National Insurance liabilities, substantially boosting your retirement savings at a lower net cost to your take-home pay.