Staying ahead of HMRC deadlines is one of the simplest ways to protect your business from penalties and stress. The 2025 compliance calendar brings multiple reporting obligations for individuals, landlords, employers, and limited companies. Below is your one-page guide to every major filing date and what each means for you.
Key Dates to Remember for 2025
5 April 2025 – End of the UK Tax Year (2024/25)
Marks the official close of the tax year. All income, expenses, and payroll data up to this date must be captured for your personal or business tax return.
6 April 2025 – Start of the New Tax Year (2025/26)
A new financial year begins — ideal time to reset your bookkeeping, start digital record-keeping if not already doing so, and review your tax planning for the year ahead.
5 October 2025 – Deadline to Register for Self Assessment
If you became self-employed or started earning rental or freelance income during 2024/25, you must register with HMRC by this date to receive your UTR (Unique Taxpayer Reference).
31 October 2025 – Paper Tax Return Deadline
If you still file paper returns (instead of online), HMRC must receive them by this date for the 2024/25 year. Late submissions automatically trigger a £100 fine — even if no tax is due.
30 December 2025 – Online Submission via PAYE (Optional)
If you owe less than £3,000 in tax and want HMRC to collect it through your salary or pension via PAYE, you must submit your online return by 30 December 2025.
31 January 2026 – Final Online Filing & Payment Deadline
This is the big one — the deadline to file your online Self Assessment for 2024/25 and pay any balance due. Late filing or late payment results in automatic penalties and daily fines thereafter.
31 July 2025 – Second Payment on Account
If you pay tax through instalments (“payments on account”), your second instalment for the 2024/25 tax year is due by this date. Missing it can lead to interest and penalty charges.
31 May 2025 – P60 Distribution to Employees
Employers must provide all employees with a P60 by 31 May. This summarises their total pay and tax deducted for the year and is essential for employees’ records and mortgage or loan applications.
6 July 2025 – P11D & P11D(b) Submission Deadline
Employers must report all taxable benefits and expenses (company cars, medical insurance, etc.) to HMRC using P11D forms and pay any related Class 1A National Insurance by 22 July 2025 (if online).
VAT Returns – Monthly or Quarterly
VAT-registered businesses must file VAT returns and make payments one month + 7 days after the period end. Under Making Tax Digital (MTD), all submissions must be made using HMRC-approved software.
Corporation Tax & Accounting Period Filings
For limited companies, Corporation Tax returns are due 12 months after the accounting period ends, and payment is due 9 months and 1 day after the period end. If you change your accounting year, notify HMRC before 31 December 2025.
Companies House Filings (for Limited Companies)
- Confirmation Statement – must be filed at least once every 12 months.
- Annual Accounts – due 9 months after your company’s year-end.
- Failure to meet these leads to automatic late-filing penalties and, in severe cases, company strike-off.
Why These Dates Matter
- Penalties & Interest – Even one day late triggers fines.
- Cash Flow Planning – Knowing payment deadlines helps manage liquidity.
- Digital Transition – As HMRC and Companies House move to full digital reporting, accurate and timely submissions are essential for compliance readiness.
Practical Actions for Businesses & Individuals
- Create a compliance calendar – Add all relevant dates to your cloud calendar with reminders 2–3 weeks before each deadline.
- Upgrade to digital bookkeeping – Use MTD-ready software like Xero, QuickBooks or FreeAgent to ensure seamless submissions.
- Assign accountability – Define who is responsible for VAT, payroll, and Self Assessment submissions.
- Engage professional support early – Accountants can handle quarterly filings, reconcile discrepancies, and prepare final submissions on time.
Final Thoughts
The tax year runs like clockwork — your compliance should too. Staying organised now avoids year-end panic, penalties, and missed opportunities for tax efficiency.
If you’d like tailored guidance, H. Financial Solutions Limited can prepare a personalised 2025 Filing Calendar and ensure all submissions — from payroll to VAT to Self Assessment — are handled on time and in full compliance.
📞 Contact us today for a free compliance health-check or MTD readiness review.