Staying compliant with Small Business Tax 2025 is essential for UK entrepreneurs. New tax rules are now in effect, and understanding these changes will help businesses manage their tax obligations effectively.
In this blog, we cover key updates to Small Business Tax 2025, common mistakes to avoid, and strategies to save money on taxes.
Key Tax Changes in Small Business Tax 2025
1. Corporation Tax Updates
From 1 April 2025, corporation tax remains:
- 25% for businesses with profits over £250,000
- 19% for small businesses with profits under £50,000
- Marginal relief for profits between £50,000 and £250,000
Read more about corporation tax on the HMRC website
2. Making Tax Digital (MTD) Rules for Small Businesses
- From April 2026: MTD applies to self-employed individuals and landlords earning over £50,000.
- From April 2027: Those earning over £30,000 must also comply.
Find out more about MTD on HMRC’s website
3. National Insurance (NI) Changes in Small Business Tax 2025
- Self-employed Class 4 NI: Reduced from 9% to 8% for profits between £12,570 and £50,270.
- Self-employed Class 2 NI: Abolished from April 2025.
Check the latest NI contribution changes on Gov.uk
4. VAT Registration Threshold for Small Businesses
The VAT threshold remains £85,000, but discussions about future reductions continue.
Learn more about VAT registration from HMRC
Common Small Business Tax 2025 Mistakes
1. Poor Record-Keeping
HMRC requires businesses to keep financial records for at least six years. Failing to maintain accurate records can lead to compliance issues.
View HMRC’s guidance on record-keeping
2. Missing Tax Deadlines in 2025
Filing late can result in fines. Important deadlines include:
- Self-Assessment Tax Return: 31 January 2025
- Corporation Tax: Due 9 months after year-end
- VAT Returns: Filed quarterly
View important tax deadlines on HMRC’s website
3. Not Claiming All Allowable Expenses
- ✔️ Home office costs
- ✔️ Business mileage
- ✔️ Professional subscriptions
- ✔️ Equipment & software
See HMRC’s list of allowable expenses
4. Not Saving for Tax Payments
Many small businesses underestimate tax liabilities. Planning ahead can help avoid cash flow problems.
Use HMRC’s tax calculator to plan payments
Tax-Saving Strategies for 2025
1. Use the £1,000 Trading Allowance
If your side income is under £1,000, you may not need to declare it.
2. Maximise the £1M Annual Investment Allowance
Deduct 100% of capital expenses like machinery and IT equipment.
3. Claim Research & Development (R&D) Tax Credits
If your business invests in new products or services, you may qualify for R&D tax relief.
Check R&D tax credit eligibility on Gov.uk
Plan Ahead for Small Business Tax 2025
Preparing for Small Business Tax 2025 will help ensure compliance and optimise savings.
Southside Accountants can assist with:
- ✅ Tax planning
- ✅ VAT compliance
- ✅ Financial management
Contact us today for expert support.