UK National Insurance Calculator Guide 2026/27: NIC Rates & Thresholds

National Insurance Contributions (NIC) are a tax on earnings paid by employees, employers, and the self-employed. Unlike income tax, NIC funds specific contributory benefits including the State Pension, Maternity Allowance, and new-style Jobseeker's Allowance. Understanding how NIC works is essential for managing your take-home pay and planning for retirement. This guide covers the 2026/27 NIC rates, thresholds, and how to calculate your contributions.

What is National Insurance?

National Insurance is a compulsory system of contributions that most working people in the UK pay alongside income tax. It was originally introduced in 1911 to fund state benefits for workers who fell ill or lost their jobs. Today, it primarily funds the State Pension and certain contributory benefits.

You pay NIC on your earnings from employment or self-employment if you are 16 or over and earn above the relevant threshold. Your contributions count towards your State Pension and certain other benefits. You need a minimum number of qualifying years of NIC to receive the State Pension, and 35 years to receive the full amount.

NIC is collected through PAYE (Pay As You Earn) for employees, meaning it is automatically deducted from your salary before you receive it. For the self-employed, Class 2 and Class 4 NIC are paid through Self Assessment or through direct debit to HMRC.

Class 1 NIC (Employees & Employers)

Class 1 NIC is the most common type, paid by both employees and employers on earnings from employment. For 2026/27, the rates are:

Employee NIC Rates

Earnings Band	Rate
Below Primary Threshold (£12,570/year)	0%
£12,570 to £50,270 (Primary Threshold to UEL)	8%
Above £50,270 (UEL)	2%

Employer NIC Rates

Earnings Band	Rate
Below Secondary Threshold (£9,100/year)	0%
Above Secondary Threshold	13.8%

Employer NIC is an additional cost on top of your salary. While it does not reduce your take-home pay directly, it affects the total cost of employment and can influence salary negotiations and benefit packages.

There is also an Employment Allowance of £5,000 available to eligible employers, which reduces the total employer NIC bill. Small businesses and charities typically benefit from this allowance.

Class 4 NIC (Self-Employed)

Self-employed individuals pay two types of National Insurance:

Class 2 NIC (Flat Rate)

Class 2 NIC is a flat weekly contribution of £3.45 (2026/27). It is designed to protect your entitlement to the State Pension and certain contributory benefits. If your self-employed profits exceed the Small Profits Threshold (£6,725/year for 2026/27), you must pay Class 2 NIC. If your profits are below this threshold, you can pay voluntarily to maintain your NI record.

Class 4 NIC (Profit-Based)

Profits Band	Rate
Below Primary Threshold (£12,570/year)	0%
£12,570 to £50,270	6%
Above £50,270	2%

Class 4 NIC is calculated through your Self Assessment tax return. You pay it alongside your income tax on your self-employed profits. Unlike Class 2, Class 4 is purely a tax on your profits and does not provide any additional benefits beyond contributing towards the State Pension.

Partners in a business partnership each pay Class 4 NIC on their share of the partnership profits.

2026/27 Thresholds

NIC thresholds determine when you start and stop paying contributions. These are aligned with income tax thresholds for most employees:

Threshold	Annual	Monthly	Weekly
Primary Threshold (Employee)	£12,570	£1,047.50	£241.54
Upper Earnings Limit (Employee)	£50,270	£4,189.17	£966.73
Secondary Threshold (Employer)	£9,100	£758.33	£175.00
Upper Secondary Threshold	£50,270	£4,189.17	£966.73

The Primary Threshold determines when employee NIC starts. The Upper Earnings Limit is the point where the employee rate drops from 8% to 2%. The Secondary Threshold is where employer NIC begins.

NIC vs Income Tax

While both NIC and income tax are deducted from your earnings, they serve different purposes and have different structures:

Feature	Income Tax	NIC
Purpose	Funds general government spending	Funds State Pension and contributory benefits
Threshold	Personal Allowance: £12,570	Primary Threshold: £12,570
Basic Rate	20% (£12,571–£50,270)	8% (£12,571–£50,270)
Higher Rate	40% (£50,271–£125,140)	2% (above £50,270)
Paid by	Employees only	Employees and employers
Cap	No cap	Upper Earnings Limit (no cap, but rate drops)

One key difference is that NIC is not charged on investment income, pension income, or savings income — only on earned income from employment or self-employment. Income tax, by contrast, is charged on all sources of income.

Voluntary Contributions

You can make voluntary National Insurance contributions to fill gaps in your NI record. This is particularly valuable if you are approaching State Pension age and have fewer than 35 qualifying years:

• Class 2 voluntary contributions: £3.45 per week. These are the most cost-effective way to fill gaps and maintain your NI record.
• Class 3 voluntary contributions: £16.55 per week. More expensive than Class 2 but still worthwhile if you need to boost your qualifying years.

Before making voluntary contributions, check your NI record on the GOV.UK website to see how many qualifying years you have and whether any gaps exist. You typically have up to 6 years to pay voluntary contributions for past years, though extensions may be available.

Voluntary NIC can be particularly beneficial if you have had periods of unemployment, low earnings, or time spent abroad. The cost of voluntary contributions is usually far less than the additional State Pension income they can generate over a lifetime.