April Newsletter

As we move into the new tax year, April brings a range of important updates and deadlines that businesses and individuals should be aware of. From upcoming changes to the reporting of Benefits in Kind (BiKs) and the continued freeze on tax allowances, to developments in Making Tax Digital (MTD) for Income Tax, this month’s newsletter highlights key areas that may impact on your financial planning and compliance obligations.

We also cover a recent issue affecting Companies House systems and what it means for business security, along with a handy tax diary to help you stay on track with important filing and payment dates over the coming weeks.

If you have any questions about how these changes affect you, or would like tailored advice, please do not hesitate to get in touch.

Changes to reporting of BiKs

Mandatory payrolling of benefits in kind (BiKs) and taxable employment expenses will be introduced from 6 April 2027. This represents a major change in reporting and means that for most benefits, the annual P11D form will no longer be required from the start of the 2027-28 tax year.

The requirement to report Income Tax and Class 1A National Insurance on most BiKs through Real Time Information (RTI) was originally due to start on 6 April 2026 but has been delayed until 6 April 2027 to allow additional time for employers, payroll professionals, software providers and agents to prepare.

The deadline to register for the current voluntary payrolling service for the 2026-27 tax year is 5 April 2026. After this, the service will close in preparation for the introduction of mandatory payrolling. 

From April 2027, employers will report BiKs and expenses via the Full Payment Submission (FPS), aligning reporting with the process currently used for reporting salaries. The number of RTI fields will be expanded to reflect the data currently captured through P11D and P11D(b) forms. Employers will also have the option to payroll employment-related loans and accommodation on a voluntary basis.

To support implementation, HMRC will waive penalties for inaccuracies related to mandatory payrolling for 2027-28, provided there is no evidence of deliberate non-compliance. However, existing late filing, late payment penalties and interest will continue to apply.

HMRC has confirmed that its Basic PAYE Tools software will also be updated to support payrolling of benefits in kind from April 2027.

Tax allowances frozen for 2026-27

It was confirmed as part of the Autumn Budget that the Income Tax thresholds will continue at their current levels for a further three years, extending the freeze until April 2031. This means that most tax allowances are to remain frozen for 2026-27 and beyond.

As a result, the personal allowance will stay at £12,570, while the higher rate threshold will remain at £50,270 for taxpayers across most of the UK (with different thresholds applying in Scotland). National Insurance thresholds will also remain fixed over the same period.

Keeping these thresholds unchanged means that many taxpayers will gradually pay more tax as their earnings increase over time. This effect, commonly known as fiscal drag, occurs when wages rise but tax bands do not. As incomes grow due to inflation or pay increases, a larger portion of earnings becomes taxable, and more people move into higher tax brackets.

In practical terms, the continued freeze is likely to push increasing numbers of taxpayers into the 40% higher rate band and, for some, the 45% additional rate band.

Others who previously earned below the personal allowance may also begin paying Income Tax for the first time. Although tax rates themselves remain unchanged, the overall tax burden rises as more income becomes subject to tax.

Fiscal drag is influenced by several factors, including government policy on tax thresholds, inflation levels and wage growth. In periods of rising wages or high inflation, the impact of frozen thresholds becomes more pronounced. For taxpayers the impact of fiscal drag effectively operates as a stealth tax over time.

Companies House blunder

A Companies House blunder has raised concerns after a flaw in the WebFiling service briefly exposed sensitive company data. The issue, identified on 13 March 2026, meant that a logged-in user could potentially access and amend limited details of another company by carrying out a specific sequence of actions.

Companies House has stated that this system vulnerability was not available to the general public. Only users with authorised access codes who were already logged into the system could have exploited it. Nevertheless, the nature of the flaw meant that certain private information, such as dates of birth, residential addresses and company email addresses may have been visible. There was also a risk that unauthorised filings, including accounts and changes to director details, could have been submitted on another company’s record.

After identifying this issue, Companies House shut down the WebFiling service at 13:30 on 13 March to investigate. Following independent testing, the system was restored at 09:00 on 16 March. Companies House has said that passwords and identity verification data were not compromised, and that existing filed documents, such as accounts or confirmation statements, could not be altered.

The issue is believed to have arisen from a WebFiling systems update in October 2025. It has been reported to both the Information Commissioner’s Office and the National Cyber Security Centre.

Companies are now being urged to review their registered details and filing history carefully. While no confirmed misuse has been reported so far, Companies House is continuing to investigate. If a company has a concern, it should raise a complaint via the Companies House complaints page at www.gov.uk/government/organisations/companies-house/about/complaints-procedure and include evidence to describe the issue.

MTD for Income Tax - are you affected?

If you have not yet checked whether you need to use Making Tax Digital (MTD) for Income Tax, now is the time to urgently see if you are affected. The Income Tax reporting requirements for some self-employed individuals and landlords will change significantly from 6 April 2026. MTD for Income Tax changes the traditional annual self-assessment process to a new digital record-keeping and quarterly updates process submitted through recognised software.

From April 2026, those with qualifying income over £50,000 will be required to maintain digital records and submit quarterly updates of trading or property income and expenses. From April 2027, the threshold will reduce to £30,000, and in April 2028 it will further reduce to £20,000. 

A full tax return will still be required by the following 31 January after the tax year i.e. the first MTD for Income Tax return, covering the 2026-27 tax year, will be due by 31 January 2028.

MTD aims to reduce errors, improve efficiency, and support business productivity. HMRC estimates that around 860,000 taxpayers will join in 2026, with more joining in 2027. 

The system also provides exemptions for those unable to go digital and offers accessible software solutions. Taxpayers joining MTD for Income Tax in April 2026 will not receive penalty points for late quarterly updates for the first 12 months. This will allow them time to adapt to the new system.

Tax Diary April/May 2026

1 April 2026 - Due date for corporation tax due for the year ended 30 June 2025.

19 April 2026 - PAYE and NIC deductions due for month ended 5 April 2026 (If you pay your tax electronically the due date is 22 April 2026).

19 April 2026 - Filing deadline for the CIS300 monthly return for the month ended 5 April 2026.

19 April 2026 - CIS tax deducted for the month ended 5 April 2026 is payable by today.

30 April 2026 - 2024-25 tax returns filed after this date will be subject to an additional £10 per day late filing penalty for a maximum of 90 days.

1 May 2026 - Due date for corporation tax due for the year ended 30 July 2025.

19 May 2026 - PAYE and NIC deductions due for month ended 5 May 2026. (If you pay your tax electronically the due date is 22 May 2026).

19 May 2026 - Filing deadline for the CIS300 monthly return for the month ended 5 May 2026.

19 May 2026 - CIS tax deducted for the month ended 5 May 2026 is payable by today.

31 May 2026 - Ensure all employees have been given their P60s for the 2025/26 tax year.