Employer National Insurance in the UK: A Guide for Overseas Companies
There are two entirely different National Insurance questions an overseas company runs into when hiring UK staff, and they get confused constantly. One is personal: when does a new overseas employee need to apply for their own National Insurance number, we’ve covered that separately in our guide on when overseas employees should apply for a NI number https://www.paulbeare.com/blog/when-should-an-overseas-employee-apply-for-their-national-insurance-number/. The other is entirely different: what does National Insurance actually cost the business as an employer, and this is the one that affects your budget, not your new hire’s paperwork.
Employer National Insurance is a direct cost on top of an employee’s salary, not a deduction from it. For a business used to a different country’s payroll tax structure, it’s easy to underestimate by treating it as a rounding error rather than a real, ongoing line item that scales with every UK hire.
This guide covers how Employer National Insurance actually works, current rates and thresholds, and how the Employment Allowance can offset it.
What Employer National Insurance Actually Is
Overseas companies hiring UK staff often run into two entirely different things that share the words ‘National Insurance’, and mixing them up leads to real budgeting mistakes. One is personal: when does a new employee need to apply for their own National Insurance number, we’ve covered that separately in our guide on when overseas employees should apply for a NI number https://www.paulbeare.com/blog/when-should-an-overseas-employee-apply-for-their-national-insurance-number/. The other is entirely different: what does National Insurance actually cost the business as an employer, and this is the one that affects your budget, not your new hire’s paperwork.
Employer NI vs Employee NI
Employee NI is calculated on the individual’s own pay and reduces what lands in their bank account, the employee sees this on their payslip alongside income tax. Employer NI never appears on the employee’s payslip at all, since it isn’t deducted from their pay, it’s an additional cost the business absorbs separately.
The rates and thresholds also differ between the two. Employer NI is charged at 15% on an employee’s earnings above the secondary threshold, currently £5,000 a year (£417 a month, £96 a week) for 2026/27. This threshold and rate apply per employee, so the cost scales directly with headcount, a genuinely different consideration for an overseas company modelling the cost of a five-person UK team versus a single hire.
Why It Matters for Overseas Companies
Employer NI is a cost businesses new to the UK system consistently underestimate, partly because equivalent payroll tax structures in other countries work differently, and partly because it’s simply less visible than salary itself when budgeting a new role. Getting this wrong at the offer stage means either underbudgeting for a hire or discovering the true cost only once payroll is actually running.
There’s a real financial upside worth knowing about too. The Employment Allowance can materially reduce this cost for eligible businesses, and it’s genuinely easy to miss if you’re working from outdated guidance or simply unaware it exists, since it isn’t automatic and has to be claimed.
How It Works in the UK
Employer NI is calculated and paid alongside every payroll run, as part of the same PAYE process that handles income tax and Employee NI. It’s reported to HMRC through Real Time Information (RTI) submissions and paid over on the standard payroll tax deadlines: by the 22nd of the following month if paying electronically, or the 19th if paying by cheque, the same schedule as PAYE.
The Employment Allowance works as an offset against this liability, not a separate refund. For 2026/27, eligible employers can claim up to £10,500 off their annual Employer NI bill, claimed through the Employer Payment Summary (EPS) and applied automatically against each payroll run until either the £10,500 limit is reached or the tax year ends, whichever comes first.
Not every business qualifies. Single-director companies where the director is the only employee paid above the secondary threshold generally cannot claim the Employment Allowance, a restriction worth checking before assuming it applies, particularly for a newly formed UK subsidiary with a small initial headcount.
Common Mistakes International Businesses Make
The most common mistake is budgeting a UK hire around salary alone, without adding Employer NI as a genuine cost on top. Because it doesn’t appear on the employee’s payslip, it’s easy for the true cost of a role to be understated when a business is comparing UK hiring costs against what a similar role would cost elsewhere.
A second common mistake is assuming the Employment Allowance applies automatically. It doesn’t, it has to be actively claimed through the EPS, and businesses that don’t know it exists simply pay more Employer NI than they need to, particularly in the early years of a UK operation when every cost saving matters.
A third mistake, and the one this piece was written to correct, is conflating Employer NI with an individual employee’s National Insurance number. They’re unrelated concepts that happen to share a name, one is a business cost calculation, the other is a personal registration step for an individual employee, covered separately in our NI number timing guide https://www.paulbeare.com/blog/when-should-an-overseas-employee-apply-for-their-national-insurance-number/.
How Paul Beare Helps With This
Our payroll services (link to: https://www.paulbeare.com/payroll-services-uk/) calculate Employer National Insurance correctly as part of every payroll run, confirm Employment Allowance eligibility, and claim it on your behalf where it applies, so this cost is budgeted accurately from your first UK hire rather than discovered after the fact.
If you’re still working through the basics of UK payroll registration and deadlines, our guide to registering a UK PAYE scheme https://www.paulbeare.com/blog/register-a-uk-paye-scheme-for-a-non-uk-company/ and our payroll deadlines checklist https://www.paulbeare.com/blog/a-simple-guide-to-payroll-overseas-company/ cover the surrounding process.
Questions & Answers
What is the current Employer National Insurance rate?
15% on employee earnings above the secondary threshold of £5,000 a year, for 2026/27. This is a separate cost to the business, paid on top of salary, not deducted from the employee’s pay.
Is Employer National Insurance the same as an employee's National Insurance number?
No. Employer National Insurance is a business cost calculated on payroll. A National Insurance number is a personal identifier an individual employee needs, an entirely separate matter covered in our guide on when overseas employees should apply for one.
How much can I claim through the Employment Allowance?
Up to £10,500 off your annual Employer National Insurance bill for 2026/27, for eligible employers. It’s claimed through your Employer Payment Summary and isn’t automatic.
Can a single-director company claim the Employment Allowance?
Generally not, if the director is the only employee paid above the secondary threshold. This is a common restriction worth checking before assuming the allowance applies to a small or newly formed UK entity.
Speak to our payroll services team.
Understanding the true cost of Employer National Insurance protects your UK hiring budget from an expensive blind spot. If you’d like this calculated and managed correctly from your first UK hire.
