UK business owners have had to absorb an unusually dense series of tax changes across the 2025/26 and 2026/27 tax years. Some increase the cost of employing staff. Others change how owners extract profits, how entrepreneurs are taxed when selling businesses, or how sole traders and landlords must report income to HMRC.
The practical issue is not simply whether a headline tax rate has moved. A seemingly technical HMRC change can alter payroll budgets, cash flow, pricing, director remuneration, investment decisions and the amount of administration required throughout the year.
The five changes below are ranked by practical business impact rather than publicity, focusing on financial cost, compliance burden, urgency and the number of UK businesses likely to be affected.
Key Takeaways
- Employer National Insurance became more expensive from 6 April 2025, with the main employer rate rising to 15% and the Secondary Threshold falling to £5,000.
- Making Tax Digital for Income Tax became mandatory for the first qualifying sole traders and landlords from 6 April 2026.
- Dividend tax increased from 6 April 2026, affecting many owner-managed company directors and shareholders.
- Business Asset Disposal Relief now applies an 18% Capital Gains Tax rate to qualifying disposals made from 6 April 2026.
- The special Furnished Holiday Lettings tax regime ended in April 2025, removing several tax advantages previously available to qualifying properties.
- Businesses should review payroll, bookkeeping systems, dividend planning and future disposal assumptions using current rules rather than historic tax rates.
How We Selected These Five Changes
The five changes were selected according to their potential financial impact, number of businesses affected, administrative burden, compliance risk, urgency and longer-term implications.
Primary sources from HMRC and GOV.UK were prioritised for rates, thresholds, effective dates and reporting requirements, with professional tax commentary used where additional interpretation was helpful.
The ranking focuses on measures that are already affecting businesses in 2025–2026 or have confirmed implementation schedules that require businesses to prepare now.
HMRC Tax Changes at a Glance
| Rank | HMRC Tax Change | Effective Date | Who It Mainly Affects | Main Impact | Urgency |
|---|---|---|---|---|---|
| 1 | Employer National Insurance increase | 6 April 2025 | Employers | Higher payroll costs | High |
| 2 | Making Tax Digital for Income Tax | 6 April 2026 onwards | Sole traders and landlords | Digital records and quarterly reporting | Very high |
| 3 | Dividend tax increase | 6 April 2026 | Directors and shareholders | Higher tax on dividends | High |
| 4 | Business Asset Disposal Relief rate increase | 6 April 2026 | Entrepreneurs and business sellers | Higher CGT on qualifying disposals | High for sellers |
| 5 | Furnished Holiday Lettings regime abolished | April 2025 | Holiday-let owners | Loss of preferential tax treatment | High for affected landlords |
The 5 Crucial HMRC Tax Changes UK Business Owners Must Know
1. Higher Employer National Insurance Costs
What Changed
From 6 April 2025, the main rate of employer Secondary Class 1 National Insurance increased from 13.8% to 15%.
At the same time, the annual Secondary Threshold—the level above which employers generally begin paying employer National Insurance on an employee’s earnings—fell from £9,100 to £5,000.
The Employment Allowance was increased from £5,000 to £10,500, while the previous £100,000 employer-NIC-liability eligibility restriction was removed.
Eligibility rules still apply, however. For example, a limited company will generally not qualify where its only employee liable for secondary Class 1 National Insurance is also its sole director.
Who Is Affected?
The change primarily affects:
- Limited companies employing staff
- Sole traders with employees
- Partnerships with employees
- Company directors receiving salary through PAYE
- Growing businesses planning to recruit
Why It Matters
Employer National Insurance is a recurring payroll expense. That means the change can influence recruitment decisions, pay rises, margins, pricing and overall staffing budgets.
For example, consider an employee earning £30,000 per year.
Under the previous 2024/25 headline rules, employer NIC would have been approximately £2,884.
Under the post-April-2025 headline rate and threshold, it is approximately £3,750.
That represents an increase of roughly £866 per employee per year, before considering Employment Allowance or any special NIC rules.
What Business Owners Should Do
Employers should:
- Reforecast payroll costs using current NIC rates
- Check eligibility for Employment Allowance
- Confirm payroll software uses current thresholds
- Include employer NIC when calculating the true cost of new hires
- Review staffing and salary budgets before committing to expansion
Key Risk
Businesses that budget solely from gross salaries may materially underestimate the true cost of employing staff.
Editorial Verdict
This ranks #1 because it combines broad reach with an immediate and recurring financial impact. For employers, it affects cash flow every payroll period rather than only when an annual tax return is filed.
2. Making Tax Digital for Income Tax Is Now Mandatory for the First Cohort
What Changed
Making Tax Digital for Income Tax, usually shortened to MTD for Income Tax, became mandatory from 6 April 2026 for qualifying sole traders and landlords whose combined gross qualifying income from self-employment and property exceeded £50,000 in 2024/25.
The rollout then expands:
- From 6 April 2027, people with qualifying income above £30,000 in 2025/26 are due to enter MTD.
- From 6 April 2028, the threshold extends to qualifying income above £20,000 in 2026/27.
Businesses within the regime must maintain digital records using compatible software and submit quarterly information to HMRC as part of the MTD process.
Importantly, the threshold is generally based on qualifying gross income rather than taxable profit.
Who Is Affected?
The rules mainly affect:
- Sole traders
- Freelancers
- Self-employed professionals
- Individual landlords
- People with both property and self-employment income
Limited companies are not brought into MTD for Income Tax simply because their directors own them.
Why It Matters
MTD represents more than a different filing method. It changes tax administration from something heavily focused on the annual Self Assessment deadline into an ongoing digital record-keeping process.
For businesses accustomed to organising records only once or twice per year, that can require significant operational change.
What Business Owners Should Do
Sole traders and landlords should:
- Calculate their qualifying gross income
- Confirm whether and when MTD applies
- Choose compatible bookkeeping software
- Maintain records digitally throughout the year
- Add quarterly submission dates to their compliance calendar
- Speak to an accountant if their income comes from several sources
Key Risk
One of the biggest risks is assuming that the threshold applies to profit rather than qualifying gross income.
That misunderstanding could leave a business owner unaware that they have already entered the MTD regime.
Editorial Verdict
MTD ranks #2 because it changes how hundreds of thousands of people manage tax compliance and will continue expanding to smaller businesses over the next two years.
3. Dividend Tax Rates Have Increased
What Changed
From 6 April 2026, the dividend ordinary rate increased from 8.75% to 10.75%.
The dividend upper rate increased from 33.75% to 35.75%.
The additional dividend rate remains 39.35%, while the Dividend Allowance remains £500.
Who Is Affected?
The change is particularly important for:
- Limited company directors
- Owner-managed company shareholders
- Entrepreneurs extracting company profits through dividends
- Individual investors receiving taxable dividends
Why It Matters
Many owner-managed company directors have historically used a mixture of salary and dividends when extracting profits.
Higher dividend tax does not automatically make dividends inefficient, but it does mean older salary-versus-dividend assumptions may no longer produce the same outcome.
For example, if £30,000 of dividend income were taxable entirely at a rate that had increased by two percentage points, the additional tax would be approximately £600.
The real calculation will depend on total income, allowances and which tax bands apply.
What Business Owners Should Do
Company owners should:
- Review remuneration strategies using current tax rates
- Avoid relying on old salary-and-dividend rules of thumb
- Consider Corporation Tax, NIC and personal Income Tax together
- Review pension contributions where relevant
- Discuss substantial remuneration changes with a qualified adviser
Key Risk
Continuing to use a remuneration structure simply because it was tax-efficient in previous years.
Editorial Verdict
Dividend taxation ranks #3 because it directly affects a widely used method of extracting profits from owner-managed companies and can influence annual cash-flow planning.
4. Business Asset Disposal Relief Now Uses an 18% CGT Rate
What Changed
Business Asset Disposal Relief, formerly known as Entrepreneurs’ Relief, still allows qualifying business disposals to receive preferential Capital Gains Tax treatment.
However, its tax rate has risen substantially.
Qualifying gains were taxed at:
- 10% for qualifying disposals up to 5 April 2025
- 14% from 6 April 2025 to 5 April 2026
- 18% from 6 April 2026
The lifetime limit remains £1 million of qualifying gains.
Eligibility normally depends on satisfying specific conditions for a qualifying period, often at least two years, depending on the type of business or asset being disposed of.
Who Is Affected?
BADR is particularly relevant to:
- Company founders
- Owner-directors
- Sole traders selling businesses
- Business partners
- Entrepreneurs planning an exit
Why It Matters
The difference can be substantial on a high-value disposal.
For example, consider a £500,000 taxable gain that fully qualifies for BADR.
At 14%, the tax would be:
£70,000
At 18%, it would be:
£90,000
That is a difference of £20,000.
Actual liabilities can differ because of losses, exemptions, previous BADR claims and whether every element of the disposal qualifies.
What Business Owners Should Do
Anyone considering a sale should:
- Check eligibility well before agreeing a transaction
- Maintain evidence that qualifying conditions have been satisfied
- Review previous BADR claims against the lifetime limit
- Obtain tax advice before deciding transaction structure or timing
- Avoid assuming that every business sale automatically qualifies
Key Risk
A founder may plan a disposal assuming the preferential rate applies, only to discover that eligibility conditions were not satisfied.
Editorial Verdict
BADR ranks #4 because its impact can be very large for individual business owners, although it affects a narrower group than payroll, MTD or dividend changes.
5. Furnished Holiday Lettings Lost Their Special Tax Regime
What Changed
The separate Furnished Holiday Lettings (FHL) tax regime was abolished from:
- 6 April 2025 for Income Tax and Capital Gains Tax
- 1 April 2025 for Corporation Tax and Corporation Tax on chargeable gains
Properties that previously qualified as furnished holiday lettings therefore no longer receive the full range of special tax treatment previously associated with the FHL regime.
Changes include restrictions affecting finance-cost relief for individual landlords, the end of certain capital allowances for new expenditure and the loss of access to several tax reliefs previously associated with qualifying FHL businesses.
FHL income also no longer benefits from its previous treatment for some pension-relief purposes.
Who Is Affected?
The change mainly affects:
- Holiday-let landlords
- Individuals operating short-term furnished accommodation
- Companies owning qualifying holiday properties
- Trusts with former FHL property
- Property investors planning future disposals
Why It Matters
The effect can extend beyond the annual tax bill.
It may change:
- The tax treatment of borrowing costs
- Investment returns
- Capital expenditure decisions
- Pension-planning assumptions
- Capital Gains Tax planning
- The attractiveness of retaining or selling a property
Businesses with heavily financed holiday properties may need to pay particular attention to how interest costs are now treated.
What Business Owners Should Do
Former FHL operators should:
- Update bookkeeping and tax-return treatment
- Review borrowing-cost assumptions
- Reassess expected after-tax returns
- Check how future property disposals will be taxed
- Seek professional advice where previous plans relied on FHL reliefs
Key Risk
Continuing to account for a former FHL business using tax assumptions that ceased to apply in April 2025.
Editorial Verdict
The abolition ranks #5 because it can significantly affect the businesses within its scope, but its reach is narrower than the other four changes.
Important HMRC Deadlines to Watch
| Date | What Happens | Who Is Affected | Preparation Needed |
|---|---|---|---|
| 7 November 2026 | Standard MTD quarterly update deadline | First MTD cohort | Reconcile records and submit through compatible software |
| 7 February 2027 | Further MTD quarterly deadline | First MTD cohort | Keep digital records current |
| 6 April 2027 | MTD expands to people with qualifying 2025/26 income above £30,000 | More sole traders and landlords | Check qualifying income and software readiness |
| 7 May 2027 | Standard final quarterly update deadline for 2026/27 | First MTD cohort | Complete required quarterly reporting |
| 31 January 2028 | Self Assessment deadline for 2026/27 and relevant BADR claim deadline for certain earlier disposals | Relevant taxpayers | Prepare returns and claims in advance |
Which Businesses Are Most Affected?
Employers
Higher employer National Insurance is likely to be the most significant direct issue for firms with employees.
Labour-intensive sectors may feel the effect particularly strongly because additional NIC costs multiply across the workforce.
Eligible businesses should also make sure they are taking advantage of Employment Allowance where appropriate.
Limited Company Directors
Directors need to pay particular attention to the higher dividend rates and, where a future company sale is being considered, the higher BADR rate.
Remuneration decisions should be reviewed using the current combination of salary, dividend, Corporation Tax, National Insurance and pension rules.
Sole Traders and Self-Employed Professionals
Making Tax Digital is the most important compliance development.
For many sole traders, the main challenge will not be paying a new tax but maintaining digital records consistently and meeting several reporting deadlines throughout the year.
Small Businesses
Smaller businesses may experience disproportionate administrative pressure because bookkeeping, payroll and compliance are often handled directly by the owner rather than a finance department.
The combination of higher employment costs and increasingly digital tax administration makes forward planning especially important.
HMRC Compliance Risks Business Owners Should Not Ignore
Business owners should be particularly careful about:
- Using outdated payroll rates or thresholds
- Missing MTD registration or reporting obligations
- Assuming MTD thresholds are based on profit
- Applying obsolete dividend tax rates
- Assuming a business disposal automatically qualifies for BADR
- Continuing to apply former FHL rules
- Missing filing or payment deadlines
- Keeping inadequate digital records
- Failing to update payroll or accounting software
Where penalties apply, businesses should check the current HMRC rules rather than relying on older guidance, as transitional arrangements can change.
Practical Tax Planning Checklist
- Confirm which 2026/27 tax rates and thresholds apply to your business.
- Reforecast payroll using the current employer NIC rate and Secondary Threshold.
- Check whether your business qualifies for Employment Allowance.
- Calculate combined qualifying self-employment and property income for MTD.
- Confirm that bookkeeping and payroll software is up to date.
- Review director remuneration using current dividend tax rates.
- Check BADR eligibility before planning a business sale.
- Update the accounting treatment of any former furnished holiday letting.
- Maintain sufficient cash reserves for future HMRC liabilities.
- Discuss significant tax-planning decisions with a qualified accountant or tax adviser.
What These Changes Mean for UK Businesses
Taken together, these changes show a broader shift towards more continuous tax administration and greater emphasis on accurate, timely business records.
Making Tax Digital is moving qualifying taxpayers away from an annual-only compliance mindset. Higher employer National Insurance makes workforce-cost forecasting more important, while the increase in dividend and BADR rates means business owners should revisit older assumptions about extracting profits and selling businesses.
The abolition of the Furnished Holiday Lettings regime also demonstrates why business owners should not assume that preferential tax treatments will continue indefinitely.
For most businesses, the practical response is straightforward: maintain accurate records, use current software, forecast tax costs earlier and obtain professional advice before making significant remuneration, investment or disposal decisions.
Conclusion
HMRC tax changes should not be treated simply as an annual accounting exercise. Changes to rates, thresholds, reporting systems and employer obligations can influence business decisions months before a tax return becomes due.
For employers, higher National Insurance remains one of the most important recurring cost pressures. For sole traders and landlords, Making Tax Digital represents a major change in how tax records and reporting are managed. Owner-managed companies must also account for higher dividend taxation, while entrepreneurs preparing to sell businesses need to work with the current 18% Business Asset Disposal Relief rate.
The most important step is to check how the current rules apply to your own circumstances before making significant financial decisions. Where the amounts involved are material or the rules are complex, consider consulting a qualified accountant or tax adviser.
Editorial Disclaimer: This article provides general information about UK taxation and HMRC requirements. It does not constitute personalised tax, legal or financial advice. Tax treatment depends on individual circumstances and rules may change, so readers should verify current HMRC guidance and seek professional advice where appropriate.