If you earn income outside your regular employment in the UK, such as from self-employment, property, or other sources, you may need to report it to HM Revenue & Customs. Traditionally, this has been done through the Self Assessment tax return, but the UK tax system is changing with the introduction of Making Tax Digital (MTD) for Income Tax.
Many taxpayers are now asking the same question:
Do I still need Self Assessment, or will I move to MTD Income Tax?
The answer depends mainly on your income level, type of income, and the timeline for MTD implementation. In this guide, we explain how both systems work, who they apply to, and how you can prepare.
Understanding Self Assessment in the UK?
Self Assessment is the system used by HMRC to collect tax from individuals whose income is not taxed automatically through PAYE.
Under Self Assessment, you must complete an annual tax return declaring all relevant income for the tax year (6 April – 5 April).
Common reasons you may need Self Assessment
You may need to file a Self Assessment tax return if you:
- Are self-employed or a sole trader
- Earn over £1,000 from self-employment
- Receive rental income from UK or overseas property
- Earn dividend income above the allowance
- Have foreign income
- Need to report capital gains
- Earn over£100,000 annually
- Are a company director (in many cases)
- Receive untaxed income such as freelance work or consulting
Key Self Assessment deadlines
- Register for Self Assessment: by 5 October
- Paper tax return: 31 October
- Online tax return: 31 January
- Tax payment deadline: 31 January
Failure to meet deadlines can result in automatic penalties from HMRC.
What Is Making Tax Digital (MTD) for Income Tax?
Making Tax Digital is a government initiative designed to digitise the UK tax system and reduce reporting errors.
Instead of submitting a single annual tax return, taxpayers will need to:
- Maintain digital records
- Submit quarterly updates to HMRC
- Submit a final end-of-year declaration
The updates must be sent using MTD-compatible accounting software.
Who Will Need to Use MTD for Income Tax?
The rollout of MTD for Income Tax will happen in phases.
1. From April 2026
MTD will apply to individuals with business or property income over £50,000.
2. From April 2027
MTD will apply to individuals with income over £30,000.
3. Below £30,000 income
Taxpayers will continue using Self Assessment for now.
This applies to:
- Self-employed individuals
- Landlords with property income
The threshold is based on gross income, not profit.
Key Differences Between Self Assessment and MTD
| Feature | Self Assessment | MTD Income Tax |
| Reporting frequency | Annual | Quarterly |
| Record keeping | Manual or digital | Digital only |
| Submissions | 1 per year | 4 quarterly + final declaration |
| Software required | Optional | Mandatory |
| Tax calculation | After year end | Ongoing estimates |
MTD is designed to give taxpayers a clearer picture of their tax position throughout the year.
Will Self Assessment Disappear?
No. Even under MTD, taxpayers will still need to submit a final declaration at the end of the tax year. However, the traditional Self Assessment tax return will gradually be replaced for many taxpayers.
Some individuals will continue using Self Assessment, including those with:
- Capital gains
- Complex financial arrangements
- Trust income
- Overseas income structures
Tips to Prepare for MTD Income Tax
Many small businesses and landlords are not yet ready for digital reporting. Preparing early can make a significant difference.
1. Start Keeping Digital Records
Avoid relying on paper receipts or manual spreadsheets. Begin using cloud accounting tools to record income and expenses.
Digital records will become mandatory under MTD.
2. Review Your Income Threshold
Check whether your combined business and property income exceeds:
- £50,000 (MTD from 2026)
- £30,000 (MTD from 2027)
If you are close to these limits, you should begin preparing now.
3. Separate Business and Personal Finances
Using a separate business bank account makes record-keeping much easier and reduces errors when submitting updates.
4. Track Expenses Throughout the Year
Waiting until January to organise receipts often causes mistakes. Instead:
- Categorise expenses monthly
- Keep digital copies of invoices
- Review financial reports regularly
5. Use MTD-Compatible Accounting Software
HMRC will require digital submissions through compatible software.
Popular accounting tools used in the UK include:
- Xero accounting software
- QuickBooks Online
- Sage Accounting
These tools can automatically track income, expenses, and VAT while generating reports for tax submissions.
6. Work With a Tax Professional
Many taxpayers underestimate how complex MTD reporting can become, especially if they have multiple income sources.
An accountant can help with:
- Quarterly submissions
- Expense optimisation
- Tax planning
- Compliance with HMRC regulations
Common Mistakes to Avoid
1. Ignoring the MTD timeline
Many taxpayers assume the rules will not apply to them. However, millions of UK businesses and landlords will be affected.
2. Poor record keeping
Incomplete records can lead to incorrect tax estimates and HMRC penalties.
3. Waiting until the last minute
Transitioning to digital systems takes time. Early adoption prevents stress later.
4. Mixing personal and business expenses
This makes financial reporting inaccurate and can lead to HMRC enquiries.
Benefits of MTD for Businesses and Landlords
Although many people see MTD as an administrative burden, it also has advantages.
1. Better financial visibility
Quarterly updates provide a clearer picture of profits and tax liabilities.
2. Fewer errors
Digital record-keeping reduces mistakes compared with manual reporting.
3. Improved financial planning
Businesses can plan for tax payments earlier rather than facing a large bill in January.
4. Automation
Accounting software can automate invoices, expense tracking, and reporting.
Final Thoughts
The UK tax system is moving toward a fully digital environment. While Self Assessment remains in place for now, many taxpayers will transition to Making Tax Digital for Income Tax over the next few years. If you are self-employed or earning rental income, it is important to understand whether you will fall within the £50,000 or £30,000 income thresholds and start preparing early.
Need Help With Self Assessment or MTD Income Tax?
Managing tax compliance while running a business can be challenging. Our team provides support with:
- Self Assessment tax returns
- MTD Income Tax preparation
- Digital bookkeeping and accounting software setup
- Quarterly reporting and tax planning
Get expert guidance today and ensure your UK tax reporting is accurate, compliant, and stress-free.