UK small businesses have absorbed two Budgets’ worth of change since October 2024, and the effects compound rather than replace each other. The October 2024 Budget’s increases to employer National Insurance and its changes to capital gains tax and business rates relief are now fully in force.
The Autumn Budget 2025, delivered on 26 November 2025, layered a further set of changes on top, most notably for dividend tax and the freeze on income tax and National Insurance thresholds. For SME owners and employers, understanding the cumulative effect across both Budgets matters more than treating either one in isolation.
What’s Already in Force, From the October 2024 Budget
The October 2024 Budget also confirmed a substantial rise in the National Living Wage, which took effect from April 2025 alongside the National Insurance changes. For businesses in sectors with a high proportion of staff paid at or near the minimum, this compounded with the employer NI increase rather than arriving as a separate, isolated cost, since both changes affected the same payroll at the same time. Modelling the two together, rather than assessing each in isolation, gives a more accurate picture of the actual increase in the cost of employment since April 2025.
Employer National Insurance increased from 13.8 percent to 15 percent from April 2025, with the secondary threshold, the point at which employer NI becomes payable per employee, reduced from £9,100 to £5,000 per year. The Employment Allowance, which reduces the NI liability of eligible employers, increased to £10,500, offsetting a meaningful share of the increase for smaller payrolls. For businesses with larger workforces, the net cost of employment increased, and the impact needs to be modelled across the full payroll rather than assumed to be fully absorbed by the higher allowance.
Capital gains tax rates increased at the same time: the lower rate from 10 to 18 percent and the higher rate from 20 to 24 percent. Business Asset Disposal Relief, formerly Entrepreneurs’ Relief, was retained, but the rate at which it applies to qualifying business disposals rose in stages, from 10 to 14 percent from April 2025, and to 18 percent from April 2026, meaning the full increase is now in effect. For business owners with exit plans, that stepped timeline has now played out in full, and the current 18 percent rate should be treated as the baseline for any future disposal planning rather than a rate still working its way toward that level.
The retail, hospitality, and leisure business rates relief scheme was extended in the Budget but at a reduced level, from 75 percent relief to 40 percent from April 2025. For small businesses in qualifying sectors, this represented a material increase in rates costs that has now been factored into a full year or more of premises cost planning.
The Autumn Budget 2025: A Further Layer
The Autumn Budget 2025 extended the freeze on income tax personal allowance, higher-rate, and additional-rate thresholds, at £12,570, £50,270, and £125,140 respectively, out to 2030-31. National Insurance thresholds were frozen on the same extended timeline. Freezing thresholds while wages rise pulls more income into higher tax bands over time even without headline rate changes, an effect sometimes called fiscal drag, and it applies to business owners’ personal income as much as to their employees’.
The most significant new measure for owner-managers is the increase in dividend tax. From April 2026, the basic and higher rates of dividend tax rise by two percentage points, from 8.75 to 10.75 percent and from 33.75 to 35.75 percent respectively, with the additional rate unchanged at 39.35 percent. The £500 dividend allowance remains in place.
For directors of limited companies who take a mix of salary and dividends, a common structure for owner-managed businesses, this narrows the tax advantage dividends have historically held over salary. It’s worth revisiting the salary and dividend split with an accountant rather than assuming a strategy set several years ago still produces the most efficient outcome.
A separate change restricts the National Insurance advantage of salary sacrifice pension arrangements. From April 2029, NI relief on salary sacrifice pension contributions will be capped, with contributions above £2,000 per person per tax year losing the NI-free treatment they currently enjoy. Pension contributions are a significant part of how many SMEs structure staff benefits, and this change, while not taking effect for several years yet, is worth building into longer-term remuneration planning now rather than closer to the deadline.
Tax on savings and property income is also rising, by two percentage points across the relevant bands, though not until April 2027. Businesses or business owners with rental property income or significant savings income should note this is a later change than the dividend tax rise and doesn’t require immediate action, but is worth factoring into medium-term planning.
A handful of other measures from the Autumn Budget 2025 affect specific sectors more than others. Private hire vehicle operators, including taxi and minicab firms, became liable for VAT on fares from 2 January 2026, closing what the government described as an administrative gap some operators had used to reduce their effective VAT rate.
Fuel duty was frozen through September 2026, offering short-term relief for businesses with significant transport costs. Enterprise Management Incentive, Enterprise Investment Scheme, and Venture Capital Trust thresholds were expanded, which matters mainly for higher-growth SMEs looking to attract investment or offer share-based incentives to key staff.
What This Means in Practice
Taken together, the two Budgets point in a consistent direction: higher employment costs, a narrower gap between salary and dividend taxation for owner-managers, and personal and business tax thresholds that stay fixed while wages and profits rise around them. None of these changes is enormous in isolation, which is partly why they’re easy to underestimate individually, but the cumulative effect on an SME’s cost base and on a director’s personal tax position is considerably larger than any single measure suggests on its own.
The most useful response isn’t panic but a periodic review: modelling employer NI costs across the current payroll rather than the payroll as it stood before April 2025, revisiting salary versus dividend extraction with an accountant ahead of the April 2026 dividend tax rise, and checking whether the current 18 percent Business Asset Disposal Relief rate changes the economics of any planned business sale. The Office for Budget Responsibility publishes detailed analysis of each Budget’s measures at obr.uk, and HM Treasury’s own Budget documents remain the primary source for the exact detail of any measure summarised here.
Ireland
The Republic of Ireland operates an entirely separate Budget process and tax system, and UK Budget changes have no direct effect on Irish tax liabilities. Ireland’s Budget 2026 was announced on 7 October 2025 and took a notably different direction from the UK’s, with several measures aimed at supporting business investment rather than raising revenue from it.
The Research and Development tax credit increased from 30 to 35 percent, with the first-year refund cap also rising. The lifetime limit under Ireland’s Revised Entrepreneur Relief increased from €1 million to €1.5 million, and the Key Employee Engagement Programme and Special Assignee Relief Programme schemes, both aimed at helping smaller companies attract and retain talent, were extended.
Ireland also introduced Auto-Enrolment, a new mandatory workplace pension system known as My Future Fund, which went live on 1 January 2026 and represents a significant new payroll obligation for Irish SMEs that don’t already offer a qualifying pension scheme. Irish businesses should refer to Revenue’s own published Budget 2026 documentation for the detail relevant to their specific circumstances, rather than assume that a UK-focused summary such as this one captures measures specific to the Irish system.
FAQs
Has employer National Insurance gone up again since April 2025?
No further increase to the headline rate has been announced since the rise to 15 percent that took effect in April 2025. The Autumn Budget 2025 extended the freeze on NI thresholds rather than changing the rate itself, which still increases the effective cost of employment over time as wages rise against a fixed threshold.
How much has Business Asset Disposal Relief actually increased by?
The rate rose in two steps from the original 10 percent: to 14 percent from April 2025, and to 18 percent from April 2026. Both increases have now taken effect, so 18 percent is the current rate rather than a target still being phased in.
Does the dividend tax increase affect all company directors?
It affects any director or shareholder who takes dividend income above the £500 tax-free allowance, which in practice covers most owner-managers of limited companies. The two percentage point rise applies to the basic and higher rates from April 2026; the additional rate is unchanged.
When does the salary sacrifice pension change take effect?
Not until April 2029, when National Insurance relief on salary sacrifice pension contributions will be capped, with amounts above £2,000 per person per year losing NI-free treatment. It’s a distant deadline but worth factoring into longer-term remuneration and benefits planning given how far in advance it’s now known.
Do UK Budget changes apply to a business trading in both the UK and Ireland?
Only to the UK side of that business. The two tax systems are entirely separate, and a business operating across both jurisdictions needs to track each Budget cycle independently rather than assuming either set of changes applies uniformly across its full operation.
