Tax | Tax filing deadlines: May – Sep 2026

Key dates for launch of mandatory HMRC tax adviser register and P60 deadline, and more

5 May 2026

Tax

HMRC

Tax Compliance

Tax Planning

Tax | Higher earners shelled out record £190bn in income tax

‘Higher earners are firmly in the frame for tax attacks’ as income tax take from additional and higher rate taxpayers exceeds £190bn

30 Apr 2026

Tax

Personal Tax

HMRC

Tax | CapGemini wins £500m contract for HMRC phone system overhaul

HMRC awards multimillion pound contract to CapGemini to manage rollout of a brand new telephony and contact management system

30 Apr 2026

Tax

HMRC

Technology

Tax | 28k staff given Copilot in major AI rollout at HMRC

Following a four-month trial, HMRC rolls out Microsoft Copilot AI tool to 28,000 staff with clearance to use even on ‘Official‑Sensitive’ information

30 Apr 2026

Tax

HMRC

Technology

Tax | Locum doctor overcounted days in £31k tax dispute

Tribunal rules against NHS locum deciding failure to evidence expenses receipts and inaccuracies in tax returns were deliberate behaviour

30 Apr 2026

Tax

HMRC

Case Reports

Business | Collapsed Claire’s Accessories owes £1.3m tax bill

HMRC owed millions in unpaid tax as administrators of high street teen jewellery and piercing chain closes all stores with 1,302 jobs lost

28 Apr 2026

Business

Companies

Restructuring & Insolvency

Tax

VAT

HMRC

Tax | Windfarm operator loses £48m capital allowances tax case

HMRC wins long-running dispute over eligibility of tax relief on spend on environmental surveys carried out by Orsted as Supreme Court flags ‘penumbra of meaning’

28 Apr 2026

Tax

Business Tax

HMRC

Case Reports

Tax | Conveyancers will have to sign mandatory tax register

Unpopular tax adviser register will capture conveyancers involved in any kind of stamp duty payment

27 Apr 2026

Tax

Business Tax

Personal Tax

HMRC

Tax | Employer national insurance hike adds £28bn to company tax bills

Hike in employer NICs sees £28bn collected from employers in 2025-26 tax year, over 16% higher than original Treasury predictions

27 Apr 2026

Tax

Employment Tax

HMRC

Tax Compliance

Tax | HMRC clamps down on landlord tax avoidance scheme

Landlords using a scheme to reduce tax by distorting mortgage interest relief rules warned by HMRC to stop using schemes as tax avoidance

27 Apr 2026

Tax

Property Tax

HMRC

Tax Compliance

Tax Planning

Tax | Collapsed Mandelson consultancy owes £645k tax bill

Interpath confirms Mandelson’s consulting firm Global Counsel went into administration owing over half a million in tax to HMRC

23 Apr 2026

Tax

HMRC

Tax | Highest ever tax take at £939bn in single year

Soaring tax receipts up nearly 10% in just 12 months as hike in employer national insurance reaps huge benefits for the Treasury, capital gains tax explodes, and record amount of VAT collected

23 Apr 2026

Tax

Business Tax

Employment Tax

Personal Tax

VAT

HMRC

Tax | HMRC slaps 582k taxpayers with fines for late VAT payments

Equivalent of one in four traders registered for VAT fined £302m in late penalties last year for missing HMRC quarterly payment deadlines

22 Apr 2026

Tax

VAT

HMRC

Tax | HMRC clarifies MTD exemption rules and year one waiver

Following some confusion about exemptions to Making Tax Digital for Income Tax, HMRC updates guidance to clarify situation for those claiming averaging relief in year one waiver

16 Apr 2026

Tax

Making Tax Digital

Personal Tax

HMRC

Tax Compliance

Tax | 250k sign up to MTD but two thirds are accountants

One week since Making Tax Digital for Income Tax became mandatory, HMRC confirms 250,000 signed up but mostly accountants and agents, not individual landlords and self employed

14 Apr 2026

Tax

Making Tax Digital

HMRC

Tax Compliance

Tax Planning