The employee NIC main rate for 2026/27 is 8%, applying to earnings between £12,570 and £50,270. Earnings above the Upper Earnings Limit attract 2%.

Salary Sacrifice reduces your contractual salary before both income tax and NI are calculated, so you save tax AND NI on the contribution. Auto-Enrolment / Net Pay only reduces taxable income — NI is still calculated on the full salary. For example, 5% of £35,000 (£1,750) via Salary Sacrifice saves around £280 in income tax plus £140 in NI. Auto-Enrolment saves only the income tax portion.

Scotland has 6 bands: Starter (19%), Basic (20%), Intermediate (21%), Higher (42%), Advanced (45%) and Top (48%). Add an S prefix to your tax code (e.g. S1257L) to apply Scottish rates automatically. England, Wales and Northern Ireland use 3 bands: Basic (20%), Higher (40%) and Additional (45%).

A K code (e.g. K497) means HMRC has calculated that deductions exceed your allowances — usually due to unpaid tax from a previous year, taxable state benefits, or company benefits. The number is multiplied by 10 and added to your gross income before tax is calculated, increasing your tax liability. Contact HMRC or a tax adviser if you receive a K code to ensure it is correct.

Consider professional advice if you have multiple income sources, self-employment income, rental income, an income over £100,000 where your Personal Allowance is tapered, a K code, an HMRC investigation, or complex employment arrangements. UK Tax Hero can match you with a specialist immediately.