Class 4 NICs who is liable?

Most self-employed people are required to pay Class 4 National Insurance contributions (NICs) if their profits are £12,570 or more a year.

Class 4 NIC rates for the tax year 2024-25 are 6% (2023-24: 9%) for chargeable profits between £12,570 and £50,270 plus 2% on any profits over £50,270.

A number of categories of people are exempt from paying Class 4 NICs, these include:

  • People under the age of 16 at the beginning of the year of assessment.
  • People over State pension age at the beginning of the year of assessment. A person who attains State pension age during the course of the year of assessment remains liable for Class 4 NICs for the whole of that year.
  • Trustees, guardians etc of an incapacitated person are exempted from Class 4 NICs on that income.

The Class 4 NIC rate is lower than the corresponding rate for employees who pay National Insurance at 8% on the same income levels. Both the employed and self-employed pay 2% National Insurance contributions on income above the higher rate threshold.

Source:HM Revenue & Customs | 15-04-2024
author avatar
CIGMA Accounting
CIGMA Accounting Ltd is a forward-thinking accounting and tax firm based in London, dedicated to delivering high-quality compliance, tax planning, and business advisory services to entrepreneurs, landlords, and growing SMEs. With offices in Wimbledon and Farringdon, we combine local expertise with a tech-driven approach to simplify accounting. Our services include corporation tax filing, VAT compliance, HMRC investigation support, R&D tax credit claims, capital allowances optimisation, and bookkeeping automation. What sets CIGMA apart is our ability to blend traditional accounting rigour with AI-powered systems that reduce errors, save time, and provide real-time financial insights. Our team ensures that every client - from startups to high-net-worth individuals - receives a bespoke solution aligned with their growth goals. Whether you need strategic tax planning, help with HMRC disclosures, or a full outsourced finance function, CIGMA Accounting delivers clarity, compliance, and confidence.