Employer NI Calculator
Calculate employer National Insurance contributions (Class 1 secondary) including Employment Allowance eligibility for 2025/26.
Employee Details
Enter employee details to calculate employer NI contributions
Important Disclaimer
This tool provides indicative calculations only and does not constitute financial, accounting, tax, or legal advice. The accuracy of results depends on the accuracy of information you provide. Consult a qualified professional for complex situations.
Overview
Employer National Insurance (NI) contributions are a significant payroll cost for UK businesses, and understanding how to calculate them correctly is essential for compliance and financial planning. The 2026/27 tax year introduces key changes, including the Class 1 NI rate structure and adjustments to the Employment Allowance, which directly impact your NI liability. Miscalculating these contributions can lead to unexpected costs, penalties from HMRC, or even cash flow issues if overpayments are made. The calculator tool simplifies this process by breaking down the steps, ensuring you account for the £5,000 threshold and £10,500 Employment Allowance correctly. This tool helps you avoid common pitfalls and provides clarity on your employer NI obligations, saving you time and reducing financial risk.
Worked Example (2026/27)
### Worked Example: Employer NI Calculation for 2026/27
**Scenario**: A UK-based employer pays an employee a monthly salary of £6,500. The employee is under 21, so no Class 1 NI is deducted from their pay. The employer wants to calculate their NI contributions for this employee.
**Inputs**: - Monthly salary: £6,500 - Number of employees: 1 - Employment Allowance: £10,500 (annual)
**Calculation Steps**: 1. **Annual Salary**: £6,500/month × 12 months = £78,000 2. **Threshold Excess**: £78,000 - £5,000 (Class 1 NI threshold) = £73,000 3. **Employer NI Rate**: 15% (for earnings above the £5,000 threshold) 4. **Gross Employer NI**: £73,000 × 15% = £10,950 5. **Employment Allowance Adjustment**: £10,950 - £10,500 (Employment Allowance) = £450
**Final Figure**: The employer's NI contributions for this employee in the 2026/27 tax year are £450 annually, or £37.50 monthly.
2026/27 Rates & Thresholds
| Rate/Threshold | Value |
|---|---|
| Class 1 NI Employer Rate (above £5,000 threshold) | 15% |
| Employment Allowance (annual) | £10,500 |
| Class 1 NI Threshold (annual) | £5,000 |
| Class 1 NI Employee Rate (under 21) | 0% |
| Class 1 NI Employee Rate (21+) | 12% (on earnings between £12,570 and £50,270) + 2% (on earnings above £50,270) |
Common Mistakes HMRC Penalises
- Claiming Employment Allowance when ineligible, such as for a company with only one director-employee.
- Failing to apply the £5,000 threshold correctly, leading to overpayment or underpayment of NI.
- Using the wrong NI rate for employees over 21, especially when earnings exceed £50,270.
- Not accounting for the Employment Allowance cap of £10,500 per year, which could result in excess claims.
- Incorrectly calculating NI on irregular payments like bonuses or overtime without adjusting the threshold.
When to Seek Professional Advice
If your business employs a mix of staff under and over 21, or if some employees earn above £50,270 annually, the calculation becomes more complex. Seek advice if you’re unsure how to allocate the Employment Allowance across multiple employees or if payroll irregularities (e.g., bonuses, off-payroll workers) could lead to miscalculations. A professional can also help if you’re operating near the £5,000 threshold or if HMRC compliance checks reveal discrepancies in your NI reporting.
Frequently Asked Questions
What is the employer National Insurance rate for 2026/27 and how does the £5,000 threshold work?+
For the 2026/27 tax year, the main employer National Insurance rate is 15% on earnings above the £5,000 annual threshold. This means you do not pay any employer NI on the first £5,000 of an employee's annual pay, and the 15% rate applies only to the amount exceeding this limit. This simplified structure replaces the previous primary and secondary thresholds to reduce the tax burden on small businesses.
How does the £10,500 Employment Allowance reduce my 2026/27 employer NI bill?+
The Employment Allowance allows eligible businesses to reduce their total employer National Insurance liability by up to £10,500 per tax year. You can claim this allowance against your NI bill before calculating the amount due, effectively giving you a tax-free reduction on your first £70,000 of qualifying employer NI. To use this, you must register for PAYE and submit your RTI returns via Making Tax Digital.
Will Making Tax Digital for Income Tax Self Assessment apply to my business in April 2026?+
Yes, from 6 April 2026, all sole traders and landlords with gross income over £50,000 must join Making Tax Digital for Income Tax Self Assessment. This requires you to keep digital records and submit four quarterly updates to HMRC throughout the tax year. The system is designed to provide a more accurate picture of your tax position before your final payment is due.
What are the dividend tax rates and allowance for UK shareholders in 2026/27?+
In 2026/27, the dividend allowance is reduced to £500, meaning the first £500 of dividend income is tax-free. Dividends above this allowance are taxed at 10.75% for basic rate, 35.75% for higher rate, and 39.35% for additional rate taxpayers. These rates apply to the portion of your income that falls within each respective tax band after your personal allowance is used.
When do I need to pay the 35.75% s455 tax on director loans?+
The 35.75% s455 tax is due nine months and one day after the end of the company's accounting period if a director has not repaid a loan. This tax is calculated on the outstanding loan balance and is refundable to the company only when the loan is fully repaid or written off. You must report this liability on the company's Corporation Tax return and pay it by the relevant deadline to avoid interest charges.
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