The contributions component of the system, "National Insurance Contributions" (NICs) are paid by employees and employers on earnings, and by employers on certain benefits-in-kind provided to employees. The self-employed contribute partly by a fixed weekly or monthly payment, and partly on a percentage of net profits above a certain threshold. Individuals may also make voluntary contributions, in order to fill a gap in their contributions record and thus protect their entitlement to benefits. Contributions are collected by
HM Revenue and Customs (HMRC) through the
PAYE system, along with
Income Tax and repayments of
Student Loans and Postgraduate Loans. People in certain circumstances, such as caring for a child, caring for a severely disabled person for more than 20 hours a week or claiming unemployment or sickness benefits, can gain National Insurance credits which protects their rights to various benefits. National Insurance is a significant contributor to UK government revenues, with contributions estimated to comprise 18% of total revenue in the 2019/2020 financial year.
Contribution classes National insurance contributions (NICs) fall into a number of classes. Class 1, 2 and 3 NICs paid are credited to an individual's NI account, which determines eligibility for certain benefits - including the state pension. Class 1A, 1B and 4 NIC do not count towards benefit entitlements but must still be paid if due.
Class 1 Class 1 contributions are paid by employers and their employees. In law, the employee contribution is referred to as the 'primary' contribution and the employer contribution as the 'secondary', but they are usually referred to simply as employee and employer contributions. The employee contribution is deducted from gross wages by the employer, with no action required by the employee. The employer then adds in their own contribution and remits the total to
HMRC along with income tax and other statutory deductions. Contributions for employees are calculated on a periodic basis, usually weekly or monthly depending on how the employee is paid, with no reference to earnings in previous periods. Those for company directors are calculated on an annual basis, to ensure that the correct level of NICs are collected regardless of how often the director chooses to be paid. There are a number of milestone figures which determine the rate of NICs to be paid. These are the Lower Earnings Limit (LEL), Primary Threshold (PT), Secondary Threshold (ST) and Upper Earnings Limit (UEL), though often the PT and ST are set to the same value. The cash value of most of these figures normally changes each year, either in line with inflation or by some other amount decided by the
Chancellor. The PT is normally indexed to inflation using the
CPI, while other thresholds remain indexed using the
RPI. • On earnings below the LEL, no NICs are paid because no benefits accrue on earnings below this limit. • On earnings above the LEL, up to and including the PT, employee contributions are not paid but are credited by the government as if they were (enabling certain low-paid workers to qualify for benefits). • On earnings above the LEL, up to and including the ST, employer contributions are not paid. • On earnings above the PT/ST, up to and including the UEL, NICs are collected at a rate which is determined by a number of factors: • Whether the employee has reached the age at which
State Pension becomes payable • Whether the employee is a married woman paying reduced-rate contributions. This facility was abolished on 11 May 1977 but women who were already paying these contributions at that time were allowed to opt to continue to do so for as long as they remained married (or widowed) and in employment • Whether the employee is an ocean-going mariner or deep-sea fisherman. • In the case of the employer contribution, whether the employee is aged under 21 or is an apprentice aged under 25. • On earnings above the UEL yet another set of rates apply, this time depending only on whether the employee has reached the age at which State Pension becomes payable or is an ocean-going mariner or deep-sea fisherman
Table letters As indicated above, the rates at which an individual and their employer pay contributions depend on a number of factors. Consequently, there are many possible sets of employer/employee contribution rates to allow for all combinations of the various factors. HMRC allocate a letter of the alphabet, referred to as an 'NI Table Letter', to each of these sets of contribution rates. Employers are responsible for allocating the correct table letter to each employee depending on their particular circumstances. Each tax year, HMRC publish look-up tables for each table letter to assist with manual calculation of contributions, though these days most of the calculations are done by computer systems and the tables are available only as downloads. In addition, HMRC provide an online National Insurance Calculator.
Class 1A Class 1A contributions were introduced from 6 April 1991, and are paid by employers on the value of company cars and certain other
benefits in kind provided to their employees and directors, at the standard employer contribution percentage rate for the tax year. Class 1A contributions do not provide any benefit entitlement for individuals.
Class 1B Class 1B contributions were introduced on 6 April 1999 and are payable by employers as part of a PAYE Settlement Agreement (an arrangement whereby the employer meets the tax liabilities on certain benefits). Class 1B contributions are paid at the same rate as Class 1A contributions and do not provide any benefit entitlement for individuals.
Contribution rates Contribution rates are set for each tax year by the government. The general rates for the tax year 2025/26 between 6 April 2025 and 5 April 2026 are shown below. For those who qualify for the mariners rates, the employee rates are as shown below and the non-zero employer rates are 0.5% lower than those shown below.
Class 2 Class 2 contributions are fixed weekly amounts paid by the self-employed until 5 April 2024. They are due regardless of trading profits or losses, but those with low earnings can apply for exemption from paying and those on high earnings with liability to either Class 1 or 4 can apply for deferment from paying. As of January 2020, self-employed National Insurance Contributions (NICs) will be categorised as Class 2 when profits are between £6,365 and £8,631.99 a year. If a self-employed worker earns £8,632 or more a year they will be categorised as Class 4. Class 2 contributions are charged at £3.00 per week and are usually paid by direct debit. While the amount is calculated to a weekly figure, they were typically paid monthly or quarterly until 2015. For future years, class 2 is collected as part of the tax self-assessment process. For the most part, unlike Class 1, they do not form part of a qualifying contribution record for contributions-based
Jobseekers Allowance, but do count towards
Employment and Support Allowance.
Class 3 Class 3 contributions are voluntary NICs paid by people wishing to fill a gap in their contributions record which has arisen either by not working or by their earnings being too low. Class 3 contributions only count towards
State Pension and
Bereavement Benefit entitlement. The main reason for paying Class 3 NICs is to ensure that a person's contribution record is preserved to provide entitlement to these benefits, though care needs to be taken not to pay unnecessarily as it is not necessary to have contributions in every year of a working life in order to qualify.
Class 4 Class 4 contributions are paid by self-employed people as a portion of their profits. Class 4 contributions do not form part of a qualifying contribution record for any benefits, including the State Pension, as self-employed people qualify for these benefits by paying Class 2 contributions.
NI credits People who are unable to work for some reason may be able to claim NI credits (technically
credited earnings, since 1987). These are equivalent to Class 1 NICs, though are not paid for. They are granted either to maintain a contributions record while not working, or to those applying for benefits whose contribution record is only slightly short of the requirements for those benefits. In the latter case, they cannot be used to fill "gaps" in past years in contribution records for some benefits. ==Benefits==