Employer Salary Tax Calculator UK 2025/26

Quick answer: Hiring an employee on £35,000 in 2025/26 actually costs the employer about £38,675/year — that's £35,000 salary + £3,575 employer NI (13.8% on earnings above £9,100 secondary threshold) + £100 employer pension if auto-enrolled.

Reviewed by Mustafa Bilgic · UK Calculator Editor · Updated May 2026

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When you offer someone £35,000, the real cost to your business is meaningfully higher. Employer National Insurance, pension auto-enrolment, and apprenticeship levy (large employers) all add to the gross. This calculator shows you the full employer cost so you can budget headcount accurately.

Annual gross salary (£)

How employer salary tax calculator works in 2025/26

The biggest hidden cost is employer Class 1A NI at 13.8% on every £1 of an employee's gross salary above the secondary threshold (£9,100 for 2025/26). This is on TOP of the salary you pay them — it goes directly to HMRC.

Other employer costs to factor:

Auto-enrolment pension — minimum 3% employer contribution on qualifying earnings (£6,240–£50,270)
Apprenticeship Levy — 0.5% of payroll over £3 million annually
Statutory benefits — sick pay (SSP £118.75/wk), maternity (SMP £187.18/wk), redundancy (£719/wk cap)
Employment Allowance — small employers can deduct up to £10,500/year from employer NI bill (eligibility rules apply)

Worked example: £25k entry-level employee true cost

Salary £25,000 + employer NI 13.8% × (£25,000-£9,100) = £25,000 + £2,194 = £27,194. Plus 3% pension on band earnings = £562. Total £27,756/year.

Gross: £25,000 → Take-home: £21,519.60/year (£1,793.30/month)

Worked example: £50k professional true cost

Salary £50,000 + employer NI £5,644 + pension £1,321 = £56,965/year. Cost is 13.9% above stated salary.

Gross: £50,000 → Take-home: £39,519.60/year (£3,293.30/month)

Worked example: £100k senior true cost

Salary £100,000 + employer NI £12,544 + pension £1,321 (capped at qualifying earnings UEL) = £113,865/year.

Gross: £100,000 → Take-home: £68,557.40/year (£5,713.12/month)

Frequently asked questions

What is employer NI for 2025/26?

Employer Class 1A NI is 13.8% on every £1 of employee earnings above the secondary threshold of £9,100. Unlike employee NI, there's no upper limit — employer NI continues at 13.8% all the way to the additional rate.

How is the secondary threshold different from primary?

Primary threshold (£12,570) is when employee NI starts. Secondary threshold (£9,100) is when employer NI starts. The difference matters most for low-paid jobs where employees pay no NI but employers still do.

Does Employment Allowance reduce my employer NI bill?

Yes — eligible small employers can claim £10,500/year off their employer NI bill (2025/26). Eligibility excludes single-director companies and large employers (>£100k secondary NI bill in prior year).

What's the apprenticeship levy?

0.5% of total UK payroll, paid by employers with annual payroll over £3 million. Each employer gets a £15,000 levy allowance, so it only bites at payroll £3M+. Money goes into a digital account to fund apprenticeship training.

Is auto-enrolment pension mandatory?

Yes — all employers must auto-enrol eligible employees (22+, earning £10k+, working in UK). Employer minimum 3% on qualifying earnings (£6,240-£50,270 band), employee 5%, total 8%.

How much does a £50k employee really cost?

Salary £50,000 + employer NI £5,644 (13.8% × £40,900 over secondary threshold) + auto-enrolment pension £1,321 (3% on £44,030 qualifying earnings band) = £56,965/year true cost. About 13.9% above the salary you advertise.

Can the employee see how much I pay in employer NI?

Yes — payslips are required to show employer NI alongside employee deductions in newer schemes, and Total Reward Statements often include the figure. It's a useful retention tool to show full employment cost.

Official UK Sources

Last reviewed: May 2026 against HMRC 2025/26 rates.

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