The UK tax and accounting landscape is particularly busy as we enter 2026. With the Self Assessment deadline fast approaching, major reforms to Making Tax Digital (MTD) for Income Tax looming just months away, and significant updates to FRS 102 now in effect for many entities, it's a pivotal time for individuals, sole traders, landlords, and businesses.
The Imminent Self Assessment Deadline – Act Now!
We're just days away from one of the most important dates in the UK tax calendar. For the 2024/25 tax year (covering 6 April 2024 to 5 April 2025), the key deadlines are:
- Paper filing closed on 31 October 2025 – if you haven't submitted by then, switch to online immediately to avoid additional complications.
- Online filing and tax payment must be completed by 11:59 pm on 31 January 2026.
This deadline applies to millions of self-employed individuals, landlords, high earners, and others required to submit a Self Assessment tax return. Any tax owed must also be paid by the same date, or you'll face interest and potential penalties.
HMRC has already processed millions of returns, but late filing triggers an automatic £100 penalty (even if no tax is due), with further charges for ongoing delays. Filing early helps avoid the last-minute rush, reduces stress, and ensures accuracy—especially since your 2024/25 return data will help determine if you're in scope for Making Tax Digital changes coming soon.
If you're unsure whether you need to file, check HMRC's guidance or consult us promptly.
Major Upcoming Changes: Making Tax Digital (MTD) for Income Tax from April 2026
The UK tax system is undergoing its biggest transformation in decades, with the phased rollout of Making Tax Digital for Income Tax (often called MTD for ITSA or MTD for Income Tax Self-Assessment).
Starting 6 April 2026, it becomes mandatory for sole traders, partnerships, and landlords whose total qualifying income (from self-employment and/or property) exceeds £50,000 in the relevant tax year.
Key requirements include:
- Keeping digital records of income and expenses using MTD-compatible software (no more spreadsheets alone or HMRC's basic online portal for affected taxpayers).
- Submitting quarterly updates to HMRC throughout the year (e.g., the first for 2026/27 covering April to July 2026, due by early August 2026).
- A final-year-end declaration (similar to the current Self-Assessment return), still due by 31 January following the tax year.
- Agents like us can handle submissions if authorised by you.
This replaces the traditional annual Self Assessment filing for those in scope, aiming to reduce errors, improve real-time reporting, and modernise the system. The threshold drops further in later years: to £30,000 from April 2027, and potentially £20,000 from April 2028.
Exemptions may apply in certain cases (e.g., some complex income types), and HMRC offers a soft launch with no penalty points for the first few quarterly updates in 2026 for new joiners.
If your income is near or above £50,000 in recent years, start preparing now: choose compatible software (many popular accounting packages, like QuickBooks and Xero, are ready), test digital record-keeping, and ensure you're ready by April. Your forthcoming 2024/25 Self-Assessment return will be key to confirming eligibility. Contact us, and we can handle all this for you.
Major Reforms to FRS 102 Accounting Standards – Effective from January 2026
For entities preparing financial statements under UK GAAP, the Periodic Review 2024 amendments to FRS 102 (the main standard for non-IFRS reporters) took effect for accounting periods beginning on or after 1 January 2026 (with early adoption permitted).
These changes, issued by the Financial Reporting Council (FRC), align UK standards more closely with international standards (such as IFRS) and affect an estimated 3+ million entities. The most significant updates include:
- Lease accounting (Section 20) — Most leases now go on-balance sheet as a right-of-use asset and liability for lessees, improving transparency (similar to IFRS 16). Off-balance-sheet treatment for operating leases largely ends, except for short-term (<12 months) or low-value assets. Transition uses a modified retrospective approach without restating comparatives.
- Revenue recognition (Section 23) — Introduces a simplified five-step model based on IFRS 15, requiring more judgment on when and how revenue is recognised from contracts with customers.
- Other notable changes: Enhanced disclosures (e.g., related parties for small entities, supplier finance arrangements), and various smaller alignments.
These reforms increase complexity, particularly for businesses with significant leases (e.g., property, vehicles, equipment) or multi-element contracts. Balance sheets may "balloon" with new assets/liabilities, affecting key ratios, covenants, and stakeholder perceptions.
Companies with January or later year-ends in 2026 should review contracts, update systems/policies, and consider the impact on financial statements now. Early adoption was an option, but many will apply it for the first time this year.
Final Thoughts
January 2026 marks a turning point: wrap up your Self Assessment obligations by the end of the month, gear up for MTD in April, and ensure FRS 102 compliance is embedded in your financial reporting processes.
These changes promote greater digitalisation, transparency, and alignment—but they also demand preparation. Whether you're a sole trader, landlord, or finance professional, staying proactive (and seeking expert advice where needed) will help you navigate this busy period smoothly.
For the latest official details, refer to HMRC (for tax/MTD) and FRC (for FRS 102) websites. Here's to a compliant and successful 2026!