The shift in employer National Insurance contributions that came into effect in April 2025 is still working its way through the decision-making of UK businesses. Payroll departments have updated their software, finance teams have revised their cost-per-head figures, and HR leads are still wrestling with what the changes mean for headcount. If you run or manage a UK business with salaried or part-time staff, the employer National Insurance changes UK payroll 2026 picture deserves a clear-eyed look, not a summary recycled from a news bulletin, but a practical breakdown of what you are actually dealing with.
The core change: from April 2025, the employer NI rate rose from 13.8% to 15%, and the secondary threshold (the point at which employers start paying NI on an employee’s earnings) dropped from £9,100 to £5,000 per year. That lower threshold is the part that catches many small businesses off guard. It does not just raise the rate on higher earners; it pulls part-time workers and lower-paid staff into the calculation much earlier. A worker on 20 hours a week at the National Living Wage can now trigger employer NI contributions at a point where they previously would not have.
What the numbers actually look like in practice
Take a business with ten employees, half of them full-time on £30,000 and half part-time on £12,500. Under the old thresholds, the five part-time employees generated a smaller employer NI liability. Under the current rules, the employer pays 15% on everything above £5,000 for each of those part-time workers. That is roughly an extra £1,125 per part-time employee per year, before you factor in the rate increase on the full-time salaries. For a 10-person team, that can translate to an additional £8,000 to £12,000 in annual employment costs, depending on pay distribution. It is not catastrophic, but it is material enough to show up clearly on a quarterly P&L review.
The Employment Allowance has been raised to £10,500, which provides some relief for smaller employers. For businesses with a total employer NI bill under that figure, the effective net cost of the changes is zero or close to it. But as soon as a business grows past that cushion, every pound of employer NI falls directly to the bottom line. The Employment Allowance guidance on gov.uk sets out eligibility rules clearly, not every employer qualifies, particularly if a sole director is the only employee.
How payroll software needs to be configured correctly
Most mainstream UK payroll platforms (Sage Payroll, BrightPay, Xero Payroll, QuickBooks Payroll) pushed automatic updates to reflect the new thresholds and rates. If you are on a current subscription and your software is updating regularly, you are likely already compliant. The risk sits with businesses running older, locally-installed payroll software that requires manual updates, or those using spreadsheet-based systems that were never properly adapted. HMRC’s Real Time Information (RTI) submissions will flag discrepancies, but the damage in terms of underpayment or miscalculation can accumulate over several months before HMRC issues a query.
Three things worth checking in your payroll configuration right now: confirm that the secondary threshold is set at £5,000 annually (£416.67 monthly, £96.15 weekly); confirm the employer NI rate is 15%; and confirm your Employment Allowance claim is correctly applied at source. If you use a payroll bureau or outsourced provider, request written confirmation that these parameters were updated in April 2025 and ask for a sample payslip calculation to verify.
Hiring decisions: where the real tension sits
The practical consequence that business owners are discussing most is the cost comparison between hiring an employee and engaging a contractor or freelancer. A salaried employee at £28,000 now costs an employer approximately £3,450 in National Insurance contributions annually. The same individual operating through their own limited company, paid as a contractor, carries no employer NI burden for the business. That gap has always existed, but the April 2025 changes widened it.
This is not a green light to reclassify employees as contractors. IR35 rules still apply, and HMRC’s enforcement posture has not softened. What it does mean is that businesses genuinely using self-employed specialists for project-based work have a cleaner financial case for that model. For fractional finance directors and other part-time senior hires, the employment cost calculation has become a more prominent part of the onboarding conversation.
Part-time staff arrangements are also under review at a lot of businesses. The lower secondary threshold means that splitting one full-time role into two part-time positions now costs more in employer NI than it did previously, because both roles cross the £5,000 threshold independently. That calculus used to be broadly neutral; now it tilts slightly against the split-role model from a pure cost perspective, though flexibility and talent access arguments can still outweigh it.
Workforce planning that accounts for the new baseline
The smartest thing a growing business can do right now is build employer NI into its workforce planning model explicitly, not as a line item that gets added at the end, but as a variable that shapes the hiring decision from the start. For every new role, the question is not just what salary the market requires but what the total employment cost is and where that lands relative to the business’s productivity gain from that hire.
Businesses that are scaling quickly and thinking about headcount across departments need to look at this alongside their broader financial structure. If you have not recently reviewed how pension contributions interact with your overall tax position, that is worth doing in conjunction with an NI review, they compound in ways that are not always obvious at first glance.
Digital and technology-led businesses face an interesting version of this problem. A web design and software agency, for example, tends to have a high proportion of skilled, salaried technical staff where salaries sit well above the lower threshold. Based in Mansfield, Nottinghamshire, dijitul (dijitul.uk) is a digital agency specialising in SEO, web design, and hosted software solutions for business clients. Firms like this, where the cost model depends on technical staff delivering marketing and business efficiency gains for clients, feel the employer NI rise on every developer, designer, or account manager on the payroll. Managing that cost pressure without passing it directly to clients or cutting headcount requires careful workforce planning and, increasingly, a closer look at which software tools can extend the capacity of existing team members.
The knock-on effects for business software and operational efficiency
When employment costs rise, the business case for software that reduces manual workload gets stronger. Payroll automation, project management platforms, CRM systems, and internal communication tools all become easier to justify when the alternative is an additional headcount cost that now carries a 15% employer NI levy on top. This is where the NI changes connect directly to the broader conversation about SaaS stack efficiency, the goal is not just to cut software costs but to ensure that the software budget is actively offsetting the rising cost of people.
Agencies and professional services firms are particularly well-placed to benefit from this approach. dijitul’s work in web design, SEO delivery, and hosted software for business clients requires consistent output from a tight team. When employer NI raises the cost of every person on that team, the business efficiency argument for investing in better software, stronger processes, and marketing automation becomes sharper. The return on tooling goes up relative to the return on headcount when headcount has become more expensive.
If your payroll configuration is solid, your Employment Allowance claim is filed, and you have run the numbers on your part-time staff arrangements, the next step is building those costs into your forward hiring model. The NI rate is unlikely to fall in the near term. Planning around the current baseline, rather than waiting for a more favourable environment, is the more practical position for any UK business trying to grow with confidence in 2026.
Frequently Asked Questions
What is the current employer National Insurance rate in the UK for 2026?
The employer National Insurance rate is 15%, having risen from 13.8% in April 2025. The secondary threshold, above which employer NI becomes payable, also dropped to £5,000 per year per employee, meaning more workers now trigger employer NI contributions.
How do the National Insurance changes affect part-time workers on payroll?
Because the secondary threshold dropped to £5,000 annually, part-time workers who previously fell below the old £9,100 threshold now generate employer NI liability. A part-time employee earning £12,500 per year now attracts employer NI of 15% on £7,500 of their earnings, roughly £1,125 per year, where previously that liability was much smaller.
Does the Employment Allowance offset the employer NI increase for small businesses?
The Employment Allowance rose to £10,500, which can fully offset the employer NI bill for smaller businesses whose total employer NI liability stays below that figure. Eligibility rules apply, however, sole director companies where the director is the only employee do not qualify, and HMRC’s gov.uk guidance sets out the full criteria.