The short version
National Insurance and income tax both come off your pay, but they are different taxes with different rules. Income tax is charged on most kinds of income. National Insurance is charged on earnings, and your contributions count towards the state pension and some benefits. It builds on tax.
I always thought National Insurance was another name for income tax.
It is a separate tax, with its own rates and its own purpose.
It also builds up a record that you can use later.
Side by side
Income tax
On most incomeCharged on pay, pensions, savings interest and other income, above your personal allowance.
National Insurance
On earningsCharged on pay from work, at its own rates, and gives you a record towards benefits.
How much is taken
An employee pays National Insurance of 8% on earnings between £12,570 and £50,270 a year, and 2% on earnings above that. These are the 2026 to 2027 rates. Employers pay a separate amount on top, which does not come off your pay.
The self-employed pay different rates. People over state pension age stop paying National Insurance on their earnings.
What it builds towards
Each tax year in which you pay or are credited with National Insurance can count as a qualifying year. For many people, 35 qualifying years are needed for the full new state pension, and at least 10 for any amount. If your National Insurance record started before April 2016, periods when you were contracted out can change your personal figure.
Credits can be given when you are not working, for example while caring for a child or claiming certain benefits. You can check your record on GOV.UK.
The money I pay in is saved up for my own pension.
National Insurance is spent as it arrives. Today's contributions help pay for today's pensions and benefits, and your record gives you the right to the same later.
Note: this explains how it works in general. It is not advice for your situation. For a decision about your money, check an official source or ask a qualified professional. Rates can change at a Budget.
Sources: GOV.UK, National Insurance rates and new State Pension. Figures are for the 2026 to 2027 tax year.
Key takeaways
- National Insurance and income tax are separate.
- National Insurance is charged on earnings.
- Qualifying years build the state pension.
- You need 35 years for the full amount.
Now you know.
Two separate taxes.
One builds a record.
Thirty-five years for a full pension.
Last reviewed 3 Nov 2026
