Key financial dates 2025

Keep ahead of the deadlines

We’ve put together a special list of all the important dates and deadlines that you can’t afford to miss or forget about. You’ll find everything you need to know from PAYE and tax return deadlines to some one-off dates. It’s all designed to be read at a glance – the ultimate tool for a busy business owner.

Self-Assessment Tax Return Deadline: 31 January

This is the final date to file your online self-assessment tax return for the 2023/24 tax year and pay any tax owed. (Including the first payment on account for 2024/25).

Self-Assessment Late Payment Penalty: 28 February

Deadline to pay your 2023/24 self-assessment tax to avoid a 5% late payment penalty.

National Minimum Wage (NMW): 1 April

New rates take effect: • Over 21s: £12.21 • Ages 18-20: £10.00 • Ages 16-17 and apprentices: £7.55

Stamp Duty Land Tax (SDLT) – 1 April

Temporary higher SDLT-free thresholds end. New thresholds apply: • First-time buyers: £300,000 – For residential properties worth less than £500,000. • Other buyers: £125,000 – For residential properties. • Non-residential land and properties - £150,000.

Business Rates: 1 April

The standard multiplier increases to 55.5p, while the small business multiplier remains at 49.9p.

Annual Tax on Enveloped Dwellings (ATED): 1 April

Charges rise and are based on a banding system linked with the value of the property.

End of the 2024/25 Tax Year: 5 April

Start of the 2025/26 Tax Year: 6 April

New tax rates and allowances come into effect.

Company Car Tax: 6 April

Percentage charges increase by 1% (assuming no changes to the vehicle).

Employers’ National Insurance: 6 April

Rate rises to 15%, with a reduced Secondary Threshold of £5,000. Employment Allowance increases to £10,500.

Capital Gains Tax (CGT): 6 April

Rates for business asset disposal relief and investors' relief rise to 14% (set to increase further to 18% in April 2026). The CGT rate for carried interest increases to 32%.

Making Tax Digital for Income Tax Self-Assessment (MTD for ITSA): 6 April

One year to go before MTD for ITSA becomes mandatory. Contact our accounts team to ensure you’re compliant.

Other Important Dates Annually

VAT – Quarterly Returns to HMRC every 3 months on or before the 7th of the month, five weeks after your period end date.

Company Accounts – must be submitted to Companies House within nine months after the accounting period end.

Corporation Tax – The deadline to file your corporation tax return is 12 months after the end of the accounting period it covers. The tax is payable 9 months after the end of the accounting period.

Do you need help meeting any of these deadlines?

At bennettbrooks, we understand that there are many financial deadlines to contend with and this can become overwhelming, especially for busy business owners and self-employed individuals. Our team is available to help you stay compliant and plan ahead.

Contact us to talk through your needs and ensure you’re always one step ahead.

Harnessing your ambition

Let's begin our journey together – get in touch today to find out what we can do to make your business more profitable and achieve it's goals.

Sage logo
Quickbooks logo
Xero Platinum partner logo
ICAEW logo
logo of cyberEssentials