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Self Assessment Deadlines: What's Changed for 2024/25

Important updates to self assessment filing and payment deadlines that affect millions of taxpayers, including new penalty structures and digital requirements.

November 25, 2024
6 min read
Tax Advisory Team

Key Changes for the 2024/25 Tax Year

HMRC has announced several important changes to Self Assessment deadlines and procedures for the 2024/25 tax year. These updates affect millions of taxpayers across the UK, introducing new penalty structures, enhanced digital requirements, and modified filing procedures. Understanding these changes now will help you avoid costly penalties and ensure compliance with the new requirements.

Critical Deadline Changes

  • • Paper returns deadline moved to October 31, 2024 (previously December 31)
  • • Online filing deadline remains January 31, 2025
  • • New penalty structure takes effect from April 6, 2024
  • • Enhanced digital record-keeping requirements
  • • Additional reporting requirements for certain taxpayers

Complete 2024/25 Deadline Calendar

Important Dates for 2024/25

Filing Deadlines

Paper returnsOctober 31, 2024
Online returnsJanuary 31, 2025
Registration deadlineOctober 5, 2024

Payment Deadlines

1st payment on accountJanuary 31, 2025
Final paymentJanuary 31, 2025
2nd payment on accountJuly 31, 2025

New Penalty Structure

HMRC has introduced a more severe penalty structure for the 2024/25 tax year, designed to encourage timely filing and payment. The new system includes both fixed penalties and daily charges for extended delays.

Late Filing Penalties
1 day late£100
3 months late£10/day (max £900)
6 months late£300 or 5% tax
12 months late£300 or 5% tax
Late Payment Penalties
30 days late5% of tax due
6 months lateAdditional 5%
12 months lateAdditional 5%
Interest3.25% p.a.

Enhanced Digital Requirements

The 2024/25 tax year introduces enhanced digital record-keeping requirements as part of HMRC's broader Making Tax Digital initiative. These changes affect both individuals and businesses filing self assessments.

Digital Record Keeping

All taxpayers must now maintain digital records for income and expenses. Paper-only records are no longer acceptable for most categories of income.

  • • Use approved software or spreadsheets
  • • Maintain records for at least 5 years
  • • Ensure data is backed up and secure
  • • Provide digital access to HMRC when requested

Quarterly Updates (High Earners)

Taxpayers with income over £150,000 must now submit quarterly digital updates instead of annual returns only.

  • • Quarterly submissions by 30th of month following quarter end
  • • Must use MTD-compatible software
  • • Annual reconciliation still required by January 31
  • • Penalties apply for late quarterly submissions

Property Income Changes

Landlords with property income over £10,000 annually must now comply with enhanced digital reporting requirements.

  • • Quarterly property income updates required
  • • Enhanced expense categorization
  • • Digital rent roll maintenance
  • • Tenant payment tracking requirements

Who Needs to File Self Assessment?

The criteria for filing Self Assessment have been expanded for 2024/25. More taxpayers may now need to file returns due to new reporting thresholds and income categories.

Must File if You Have:

  • • Self-employment income over £1,000
  • • Property rental income over £2,500 (reduced from £10,000)
  • • Untaxed income over £2,500
  • • Capital gains above the annual exemption
  • • Income from abroad over £2,000
  • • High Income Child Benefit charge liability

New Categories for 2024/25:

  • • Cryptocurrency gains over £1,000
  • • NFT and digital asset income
  • • Gig economy earnings over £1,000
  • • Social media monetization income
  • • Online marketplace sales (business activity)
  • • Peer-to-peer lending interest over £1,000

Good Record Keeping Practices

To ensure compliance with the new requirements:

  • • Set up digital systems at the start of the tax year
  • • Reconcile records monthly, not annually
  • • Keep digital receipts and bank statements
  • • Use cloud-based systems for accessibility and backup
  • • Consider professional software for complex situations

Common Mistakes to Avoid

Based on HMRC's feedback from previous years and the new requirements, here are the most common mistakes that lead to penalties and additional scrutiny:

Missing the Paper Filing Deadline

The October 31 deadline for paper returns catches many taxpayers off guard. File online to get the extended January 31 deadline.

Incomplete Digital Records

HMRC can now request immediate digital access to records. Ensure all income and expenses are properly categorized and stored digitally.

Forgetting Payments on Account

Many taxpayers focus on the return deadline but forget about payments on account due the same day. Both must be completed by January 31.

Underestimating New Income Categories

Cryptocurrency, gig economy, and social media income must now be reported. Many taxpayers are unaware these are taxable.

Getting Professional Help

Given the complexity of the new requirements and increased penalties, many taxpayers are choosing to work with professional accountants. This is particularly advisable if you have:

Consider Professional Help If:
  • • Multiple income sources
  • • Property rental portfolio
  • • Complex investment arrangements
  • • International income or assets
  • • Previous compliance issues
  • • High value transactions
Professional Services Include:
  • • Complete return preparation
  • • Digital record-keeping setup
  • • Tax planning and optimization
  • • HMRC correspondence handling
  • • Penalty protection insurance
  • • Year-round support and advice

TengFei's Self Assessment Service

Our Self Assessment service includes full compliance with the new digital requirements, penalty protection, and year-round support. We handle everything from digital record setup to final submission, ensuring you meet all deadlines and requirements.

Self Assessment Help

Need help with the new Self Assessment requirements? Our experts can handle everything from digital setup to final submission.

Get SA HelpFree Consultation
Quick Deadline Reminder
Paper Returns
October 31, 2024
Online Returns
January 31, 2025
Payment Due
January 31, 2025

Don't Risk Penalties - Get Professional Help

With new deadlines and digital requirements, professional Self Assessment help is more valuable than ever.