How Do I Calculate Employers Ni

Calculate your employer’s National Insurance contributions for the 2023/24 tax year

Comprehensive Guide: How to Calculate Employer’s National Insurance in the UK

As an employer in the UK, understanding and correctly calculating National Insurance (NI) contributions is a legal obligation and crucial for accurate payroll processing. This comprehensive guide will walk you through everything you need to know about calculating employer’s National Insurance contributions for the 2023/24 tax year.

What is Employer’s National Insurance?

Employer’s National Insurance contributions are payments made by employers to HMRC on top of their employees’ salaries. These contributions fund state benefits including the NHS, state pension, and other welfare programs. Unlike employee NI contributions which are deducted from wages, employer NI is an additional cost borne by the business.

Current Employer NI Rates (2023/24)

The standard rate for employer’s National Insurance is 13.8% on earnings above the Secondary Threshold (£175 per week, £758 per month, or £9,100 per year). There are no upper limits for employer contributions – the 13.8% rate applies to all earnings above the threshold.

Threshold	Weekly	Monthly	Annual
Secondary Threshold (ST)	£175	£758	£9,100
Employer NI Rate	13.8% on earnings above ST

Step-by-Step Calculation Process

1. Determine the payment period: Identify whether you’re calculating for weekly, monthly, or annual payments.
2. Identify the Secondary Threshold: £175/week, £758/month, or £9,100/year for 2023/24.
3. Calculate earnings above the threshold: Subtract the threshold from the gross pay.
4. Apply the 13.8% rate: Multiply the amount above the threshold by 0.138.
5. Consider Employment Allowance: If eligible, subtract up to £5,000 from your annual NI bill.

Practical Calculation Examples

Example 1: Monthly Paid Employee

Employee salary: £3,000/month

1. Secondary Threshold: £758
2. Amount above threshold: £3,000 – £758 = £2,242
3. Employer NI: £2,242 × 13.8% = £309.40

Example 2: Annual Salary with Employment Allowance

Employee salary: £50,000/year

1. Secondary Threshold: £9,100
2. Amount above threshold: £50,000 – £9,100 = £40,900
3. Annual Employer NI: £40,900 × 13.8% = £5,644.20
4. After Employment Allowance: £5,644.20 – £5,000 = £644.20

Special Cases and Exceptions

• Employees under 21: No employer NI on earnings up to £1,048/week (£54,274/year)
• Apprentices under 25: Same exemption as under-21s for earnings up to £1,048/week
• Veterans: 0% employer NI for first 12 months of civilian employment
• Freeports: 0% employer NI for new employees working in Freeport tax sites (up to £25,000/year)

Employment Allowance Explained

The Employment Allowance lets eligible employers reduce their annual National Insurance liability by up to £5,000. For the 2023/24 tax year:

• You can only claim if your total employer NI liability was less than £100,000 in the previous tax year
• The allowance is claimed through your payroll software or HMRC’s Basic PAYE Tools
• You can’t claim if you’re a public authority or doing more than half your work in the public sector
• If you have multiple PAYE schemes, you can only claim once across all schemes

Year	Employment Allowance	Maximum NI Liability for Eligibility
2023/24	£5,000	£100,000
2022/23	£5,000	£100,000
2021/22	£4,000	£100,000

Common Mistakes to Avoid

1. Using wrong thresholds: Always use the current year’s Secondary Threshold, not the Primary Threshold (which is for employees)
2. Double-counting allowances: Employment Allowance can only be claimed once per business, not per employee
3. Ignoring special categories: Forgetting to apply 0% rates for under-21s or apprentices
4. Incorrect payment periods: Mixing weekly, monthly, and annual calculations
5. Late payments: Employer NI must be paid to HMRC by the 22nd of the following month (or 19th if paying by post)

How to Report and Pay Employer NI

Employer National Insurance contributions must be reported and paid through the PAYE system:

1. Calculate the NI due for each pay period
2. Report the amounts through Full Payment Submission (FPS) when you run payroll
3. Pay HMRC by the deadline (usually the 22nd of the following tax month)
4. Submit an Employer Payment Summary (EPS) if you need to claim reductions like Employment Allowance
5. File your annual return (P35) by 19 May after the end of the tax year

Recent Changes and Future Outlook

The 2023/24 tax year saw several important changes to employer National Insurance:

• The Secondary Threshold was frozen at £9,100 (same as 2022/23)
• The Employment Allowance remained at £5,000
• The Health and Social Care Levy (originally planned as a separate 1.25% charge) was cancelled
• The main rate remained at 13.8% after the temporary increase was reversed

Looking ahead, the government has announced plans to:

• Maintain the Employment Allowance at £5,000 for 2024/25
• Consider further support for businesses hiring veterans
• Review the NI thresholds in line with inflation

Tools and Resources for Employers

To help with calculations and compliance, consider these official resources:

• GOV.UK Employer National Insurance Guide – Official government guidance
• Employment Allowance Eligibility Checker – Verify if you can claim the allowance
• 2023/24 Rates and Thresholds – Official HMRC documentation

For complex situations, you may want to consult with a certified payroll professional or accountant to ensure full compliance with HMRC regulations.

Frequently Asked Questions

Q: Do I pay employer NI on bonuses?

A: Yes, bonuses are treated as earnings and subject to employer NI contributions above the Secondary Threshold.

Q: What if I pay employees in non-cash benefits?

A: Most non-cash benefits are subject to Class 1A NI at 13.8%, paid annually by 22 July.

Q: Can I claim Employment Allowance if I’m a sole director with no other employees?

A: No, the allowance cannot be claimed for single-director companies where the director is the only employee.

Q: How does employer NI affect my business costs?

A: Employer NI is an additional cost on top of salaries. For example, a £30,000 salary actually costs you about £32,500 including NI.

Q: What happens if I pay late?

A: HMRC charges interest on late payments and may impose penalties for persistent late payment.