Security Engineer Take-Home Pay in UK 2026/27

A Security Engineer earning the median salary of £70K in the UK takes home approximately £51,157 per year (£4,263 per month) after Income Tax and National Insurance, using 2026/27 HMRC rates.

On a median Security Engineer salary of £70K, the effective tax rate (Income Tax and NI combined) is 26.9%, leaving £51,157 as take-home pay. This assumes standard Personal Allowance and England/Wales Income Tax rates.

On a £70K salary, a Security Engineer pays approximately £15,432 in Income Tax per year. This uses the 2026/27 Personal Allowance of £12,570, a basic rate of 20% up to £50,270, and 40% above.

On a £70K salary, employee Class 1 National Insurance amounts to approximately £3,411 per year. The 2026/27 rates are 8% on earnings between £12,570 and £50,270, and 2% above.

The standard Personal Allowance for 2026/27 is £12,570, which is tax-free. For salaries above £100,000, the allowance tapers by £1 for every £2 earned, disappearing entirely at £125,140. This does not affect the median salary shown here.

A senior Security Engineer in the UK earns a median £95,000 a year and takes home approximately £65,657 (£5,471 per month) after Income Tax and National Insurance, an effective rate of 30.9%.

A junior Security Engineer in the UK earns a median £61,000 a year and takes home approximately £45,937 (£3,828 per month) after Income Tax and National Insurance, an effective rate of 24.7%.

The biggest pay step is Mid-level to Senior: £20,000 more a year before tax, of which £11,600 reaches take-home. 42% of that raise goes to Income Tax and National Insurance, against an average 28% on the Mid-level salary, because the extra pay is taxed at the top of your bands rather than spread across all of them.

At a median £625/day, contract work grosses about £137,500 a year over 220 billable days, 96% more than the £70,000 permanent median. That premium has to pay for what an employer would otherwise cover: paid holiday and sick days, pension contributions, and the gaps between contracts. Whether a contract falls inside or outside IR35 also changes how much of it you keep. Contract and permanent benchmarks come from separate samples, so treat the gap as a guide.