How much does a £100,000 employee cost? (2026-27)

A £100,000 employee costs the employer £115,570.9 per year in the 2026-27 tax year (with minimum 3% pension). This includes £14,250 in employer NI and £1,320.9 in pension contributions — 15.6% above the gross salary. The cost per hour is £59.27.

At a glance

An employee on a £100,000 gross salary costs your business significantly more than their headline pay:

3% pension	5% pension	8% pension
Employer NI	£14,250	£14,250	£14,250
Pension	£1,320.9	£2,201.5	£3,522.4
Total cost	£115,570.9	£116,451.5	£117,772.4
Above salary	15.6%	16.4%	17.8%
Cost per hour	£59.27	£59.72	£60.4

At £100,000, pension qualifying earnings are capped at £50,270, so the pension contribution is lower as a percentage than for lower salaries. However, employer NI (with no upper cap) is the dominant on-cost.

Employer National Insurance: £14,250

Employer NI is charged at 15% on all earnings above the Secondary Threshold of £5,000:

• Earnings above threshold: £100,000 - £5,000 = £95,000
• Employer NI: £95,000 x 15% = £14,250
• Monthly employer NI: £1,187.5

This is an effective rate of 14.2% on the gross salary. Unlike employee NI, there is no upper earnings limit for employer NI — it's a flat 15% on everything above £5,000. At this salary level, employer NI alone adds more than £14000 — a significant cost.

Pension auto-enrollment: £1,320.9

UK employers must auto-enroll eligible workers into a workplace pension. The minimum employer contribution is 3% of qualifying earnings.

Qualifying earnings are the portion of salary between £6,240 and £50,270:

• Qualifying earnings (capped): £50,270 - £6,240 = £44,030
• 3% contribution: £44,030 x 3% = £1,320.9/year

Qualifying earnings are capped at £50,270, so the pension contribution doesn't increase for higher salaries. At 5%, this would be £2,201.5/year. At 8%, £3,522.4/year.

Monthly and hourly cost

Period	Salary	+ NI	+ Pension	Total cost
Annual	£100,000	£14,250	£1,320.9	£115,570.9
Monthly	£8,333.33	£1,187.5	£110.08	£9,630.91
Weekly	£1,923.08	£274.04	£25.4	£2,222.52

Based on 1,950 working hours per year (37.5 hours/week), the cost per hour is £59.27. This is the figure to use when pricing projects or comparing against contractor day rates.

What the employee actually receives

While you pay £115,570.9 in total, the employee's take-home pay (after income tax and employee NI) is:

• Take-home pay: £68,557.4/year (£5,713.12/month)
• Income tax: £27,432
• Employee NI: £4,010.6

The gap between what you pay (£115,570.9) and what the employee receives (£68,557.4) is £47,013.5 — you pay 69% more than the employee takes home. The difference goes to income tax, employee NI, employer NI, and pension.

See full £100,000 take-home pay breakdown

Frequently asked questions

How much does a £100,000 employee cost the employer?

With the minimum 3% pension, a £100,000 employee costs £115,570.9/year (£9,630.91/month). This is 15.6% above the gross salary.

How much employer NI do I pay on a £100,000 salary?

Employer NI on £100,000 is £14,250/year (£1,187.5/month). That's 15% on earnings above the £5,000 Secondary Threshold.

What is the cost per hour for a £100,000 employee?

Based on 1,950 working hours per year, the total cost per hour is £59.27. The gross salary alone works out to £51.28/hour, but employer on-costs add £7.99/hour.

Can I reduce employer costs?

Yes. Salary sacrifice arrangements reduce both the employee's tax and your employer NI. For example, pension contributions via salary sacrifice save 15% in employer NI on the sacrificed amount. You can also claim the Employment Allowance (£10,500 off employer NI) if eligible.

Where can I see the full NI breakdown?

See the detailed NI calculation for £100,000 including employee NI, employer NI, and self-employed NI comparison.