What is National Insurance, and what are Class 1 NICs?

Originally, the National Insurance scheme was set up to pay for the then newly established NHS and other state benefits after the second world war as part of the establishment of the welfare state. Workers would pay a percentage of their income so that people who could not work due to age, infirmity or ill health could still have money to live on.

This guide has been updated for the 2024/25 tax year.

National Insurance – fundamentals

National Insurance Contributions (NICs) are payable to HMRC as a deduction from earnings.

Whilst those contributions don’t directly fund things like the benefits system or state pension now, how much you contribute will ultimately determine your level of entitlement to receive certain benefits if ever you were to need them.

For example, if you do not pay enough during the course of your working life, you will not be entitled to a full state pension.

Anyone who earns a salary above a certain amount (see below) has to pay NICs, and employers also have to pay NICs for their employees who earn over that amount too.

It is worth noting from the beginning that NICs are only payable on earnings, not on dividends. If you are the director of a company and draw dividends rather than a salary, you will not need to pay NICs on your income from those dividends.

Expert advice should be sought as to which would be most tax-advantageous for your particular circumstances: drawing dividends (which attract tax at a rate linked to your income) or a salary. You would still have to pay NICs for any employees who earn over the threshold amount (see below).

Different classes of NICs are payable depending on your employment status. The amount you pay is a percentage of your income, and this percentage is set depending on how long you have paid NICs for during your working life, and how much you earn.

Class 1 NICs

These are paid partly by the employee and partly by the employer. If you are both – that is, you run a limited company and take a salary from that company as director – then you will effectively pay twice; once as the employer and once as an employee.

Employees NI

  • 8% on income between £12,570 and £50,270.
  • 2% on income above £50,270.

This is taken directly from their gross income by you as the employer and paid to HMRC.

Employers NI

  • 13.8% of each employee’s salary over £9,100 per year.

Therefore, if you or any of your employees earn a salary of less than £9,100 per year, neither that employee nor the company will need to pay NICs on that salary.

Be wary though of the payment of overtime or bonuses as if these boost income above this threshold then NICs will be payable on the affected weeks’ salary.

Employment Allowance

Your company may also be eligible to claim the Employment Allowance, which will refund up to £5,000 of Class 1 employers’ NICs per year.

However, you can’t claim if you’re the director and the only employee of the company.

Obviously, you can only reclaim employers’ NICs via the scheme if your salaries are above the prevailing NIC thresholds.

Many small company directors are remunerated with small salaries which aren’t subject to NICs at all, so the Employment Allowance may not be relevant.

Class 1A or 1B

Under these classes, NICs are also payable by employers in relation to any other benefits paid to your employees, including yourself if you draw a salary (for example, company car, private health care, travel expenses). As an employer, you will pay these NICs directly to HMRC.

To calculate the NICs you need to pay as a company director, you can use the ‘standard annual earnings period’ method or the ‘alternative’ method, depending on how regularly you draw your salary.

Class 2 and 4 NICs

If you are classed as self-employed (perhaps through a partnership), you will need to pay NICs on your income.

  • Class 2 NICs are now voluntary. If your yearly profits are below the £6,725 small profits threshold, you can make voluntary payments of £3.45 a week. This ensures that the tax year counts towards your State Pension eligibility.
  • Class 4 NICs are 6% on all profits between £12,570 and £50,250 and at 2% above £50,250.

Other points to note

If you pay Class 2 or 4 NICs, this can be accounted for via self-assessment. Class 1 NICs must be managed via your payroll system.

All NICs are payable each time you run your payroll (for example, every month or week).

The careful use of dividend payments can be used to reduce your company’s liability to NICs as part of a tax-planning package.

Tax-efficient protection for directors

  • limited company life cover