The cost of employing someone in the UK has changed more in the last eighteen months than in the previous decade. Two employer National Insurance changes, a new minimum wage level, the Employment Rights Act 2025 introducing day-one statutory rights, Statutory Sick Pay from the first day regardless of earnings, a new Fair Work Agency with inspection and penalty powers, and confirmed changes to payrolling of benefits arriving in April 2027: each of these has been reported individually. Their combined effect on a UK limited company making its first or second hire has received considerably less attention. This is an attempt to give that combined effect the analysis it deserves, with actual numbers, for the founders and directors that 1Office UK works with every day.
The regulatory timeline: what actually landed, in sequence
The changes affecting UK employers in 2025 and 2026 did not arrive as a single reform. They arrived in waves, each from a different piece of legislation, each individually manageable, but accumulating into a materially different employment cost structure than existed two years ago.
The honest total cost of employing someone in a UK limited company today
Directors of UK limited companies frequently talk about a hire in terms of the salary they have offered. The figure that matters for cashflow and budgeting is materially different. Here is what a single employee on a £35,000 salary actually costs a UK employer in the 2026/27 tax year, before any other overheads.
Before the April 2025 NI changes, the same employee would have cost approximately £37,700. The increase is approximately £4,566, driven almost entirely by the NI rate rise and the threshold reduction. For a company making three hires at similar salary levels, the cumulative increase is close to £14,000 per year in additional employer costs that did not exist before April 2025, and that figure is locked in until at least 2030/31 under current government plans.
When the employer NI changes are discussed, the focus usually falls on the rate increase from 13.8% to 15%. That is the visible number. The more structurally significant change is the reduction in the Secondary Threshold from £9,100 to £5,000. This means that £4,100 of salary that was previously completely exempt from employer NI is now subject to a 15% charge. For an employee earning £25,000, the NI liability on the salary between £5,000 and £9,100 represents £615 in new annual cost that has no offsetting saving elsewhere.
This effect compounds across every employee and across every pay rise. When a company increases an employee's salary from £28,000 to £30,000, the employer pays 15% NI on the full £2,000 increase. Under the old threshold, a larger proportion of that increase would have fallen into exempt territory. Growing your team's pay now costs structurally more per pound of increase than it did before April 2025, and this effect runs indefinitely under current policy.
1Office UK handles payroll processing, RTI submissions, Employment Allowance claims, and employer NI calculations as part of the accounting service.
The Employment Allowance saves some employers everything. It saves sole director companies nothing.
The Employment Allowance was doubled to £10,500 alongside the NI rate increase, and it is the government's primary mechanism for protecting small employers from the full impact of the changes. For many small companies it genuinely does that. A company with five employees earning £25,000 each generates approximately £15,000 in employer NI. After the £10,500 Employment Allowance, the net liability is £4,500. That is significant protection.
But the Employment Allowance has a restriction that applies to a large proportion of 1Office UK clients specifically: sole director companies where the director is the only person on the PAYE payroll cannot claim it. The rule is explicit. If the sole worker is also a director, and no other employees exist, the Employment Allowance is unavailable. The director's salary generates employer NI with no offsetting allowance whatsoever.
This creates a specific inflection point for growing companies: the moment a sole director company makes its first non-director hire above the £5,000 threshold, it immediately qualifies for the full £10,500 Employment Allowance. That is not just a benefit from the second employee; it is a retrospective offset against the entire employer NI bill for the year, including the director's own salary. A sole director who has been paying employer NI on their salary with no allowance, and then hires their first team member, should claim the Employment Allowance immediately and correctly for the full tax year.
The Employment Allowance is claimed by submitting an Employment Payment Summary (EPS) through payroll software. It does not carry forward automatically from the previous year. A company that claimed it in 2025/26 and does not resubmit the EPS claim in 2026/27 will not receive it, and HMRC will not automatically apply it. For companies using managed payroll services like 1Office UK, this is handled as standard. For directors managing their own payroll, it is the single most commonly missed annual payroll action.
Connected companies, those under common control, share a single £10,500 allowance across the group. A trading company and a holding company controlled by the same person cannot each independently claim the full allowance. This is particularly relevant for 1Office clients who have set up both an operating company and a holding structure.
What the Employment Rights Act 2025 actually means for small UK companies hiring in 2026
Alongside the cost changes, the legal risk profile of employment in the UK has shifted substantially under the Employment Rights Act 2025. The changes are being implemented in stages, but several are already in force and affecting companies making hires now. The framing of these changes as a future concern is increasingly inaccurate for companies that are hiring today.
Day-one rights that apply from the first day of employment
Since the Employment Rights Act 2025 began taking effect, new employees have day-one rights to parental and paternity leave, and are entitled to Statutory Sick Pay from their first day of employment regardless of their earnings level. The previous lower earnings limit (LEL) that excluded lower-paid and part-time workers from SSP eligibility has been removed. For companies employing part-time workers, temporary staff, or anyone earning below the previous LEL of around £6,500, the SSP exposure from day one is a genuine change to the financial model of short-term employment.
Unfair dismissal: the two-year qualification period is ending
Currently, employees must complete two years of continuous service before they can bring an unfair dismissal claim. The Employment Rights Act 2025 reduces this qualification period to six months, expected to take effect in late 2026 or early 2027. For companies making hires and hoping to assess fit within the first year before full employment protection applies, the window for that assessment is shrinking significantly. The practical implication is not that good employment relationships become more expensive: it is that the legal cost of getting a hire wrong, which can run to uncapped compensation in discrimination cases and 52 weeks' pay in unfair dismissal cases, arrives sooner in the employment relationship than it currently does.
The Fair Work Agency: enforcement has teeth now
The Fair Work Agency, established in 2026, consolidates enforcement of employment law. It has powers to inspect workplaces, impose penalties, initiate civil proceedings, and recover costs from non-compliant employers directly. This is not a new regulatory body with aspirational powers that may or may not be used. It has been actively recruiting enforcement personnel and its first operational priorities include minimum wage compliance, holiday pay calculations, and zero-hours contract arrangements. For small companies where employment law compliance has historically been managed informally, the enforcement landscape is meaningfully different from 2024.
The combined effect of the NI changes and the Employment Rights Act is that the cost of getting a UK hire wrong, in both financial and legal terms, is materially higher in 2026 than it was two years ago. The cost arrives sooner in the employment relationship (SSP from day one, unfair dismissal rights from six months). The financial baseline is higher (NI rate and threshold changes). The enforcement environment is more active (Fair Work Agency).
This does not mean UK companies should not hire. It means the decision to hire deserves more structured financial modelling and better compliance preparation than it did under the old regime. 1Office UK handles employer registration, payroll processing, RTI submissions, Employment Allowance claims, and annual accounting for UK limited companies with employees. Getting the setup right from the first hire prevents the most common and most expensive compliance errors.
Three employer decisions worth making before the year ends
1. Review your salary and dividend structure if you have recently added a second employee
If your UK limited company made its first non-director hire in 2025/26 or 2026/27, and you have not yet claimed the Employment Allowance, you may be able to claim it retrospectively for the current tax year by submitting the EPS through your payroll software. The allowance can reduce your employer NI bill to nil if your total employer NI liability is below £10,500. Check with 1Office UK whether this has been correctly claimed and whether the director's salary structure still reflects the optimal split given the current NI thresholds.
2. Review your employment contracts before the unfair dismissal qualification period changes
The reduction in the unfair dismissal qualification period from two years to six months, expected in late 2026 or early 2027, means that probationary period structures need to be reviewed now. A probationary period that was previously protected by the two-year qualification threshold will no longer provide the same legal buffer. Well-drafted employment contracts with clear performance review processes, documented from the first day, become more important once the six-month threshold is in place.
3. Prepare for mandatory payrolling of benefits in kind from April 2027
From April 2027, all benefits in kind must be reported through payroll in real time rather than through the annual P11D process. This means your payroll software must be updated to handle benefits reporting before April 2027, and your payroll team or provider needs to understand which benefits your company provides and how they are calculated. Companies that currently rely on P11D reporting and have not yet reviewed their payroll software capability for mandatory payrolling should begin that assessment now.
| Action | Timeline | Why it matters |
|---|---|---|
| Claim Employment Allowance via EPS if you have a second qualifying employee | Now, for 2026/27 | Does not renew automatically. Unclaimed allowance is lost for the year. |
| Review director salary level against current NI thresholds | Now, before year end | Optimal salary-dividend split shifted with NI changes and will shift again if Employment Allowance eligibility changes. |
| Update employment contracts and probationary processes | Before late 2026 | Six-month unfair dismissal qualification period arriving. Longer probationary periods without documented process will not provide adequate protection. |
| Assess payroll software for April 2027 mandatory payrolling of benefits | Before December 2026 | P11D reporting ends. Benefits must be included in real-time payroll. Software needs to be updated well before the April 2027 effective date. |
| Verify SSP processes for any part-time or variable-hours staff | Now | SSP applies from day one of employment for all employees regardless of earnings since the LEL restriction was removed. |
1Office UK manages payroll and employer compliance for UK limited companies from the first hire onward.
Sources and references: Deloitte UK Tax Landscape: Key Changes for 2026, February 2026; Business Compliance 2026: UK Regulatory Changes; Employer National Insurance 2026/27 rates and Employment Allowance guidance; Employer National Insurance Increase 2026 UK Guide, Alto Accounting; HMRC Rates and Thresholds for Employers 2026/27; Employment Rights Act 2025 as published; Fair Work Agency establishment documentation, 2026.
Running a UK limited company with employees or planning your first hire?
1Office UK handles employer registration, payroll, RTI filings, Employment Allowance claims, and annual accounts for UK companies.
