A Complete Guide for UK Small Businesses
If you’re a self-employed individual or landlord in the UK earning over £50,000, Making Tax Digital for Income Tax (MTD ITSA) is now live. This guide explains exactly what it means for your business, what you need to do, and how Accounting Crunchers can help you stay compliant.
Introduction: The Biggest Change to UK Tax Reporting in a Generation
April 2026 marked a major turning point for millions of UK taxpayers. MTD ITSA 2026 (Making Tax Digital for Income Tax Self Assessment) has officially launched, fundamentally changing how self-employed individuals and landlords report their income to HMRC. If you are preparing for MTD ITSA 2026, this guide breaks down exactly what it means for your business, what you need to do, and how Accounting Crunchers can help you stay compliant.
Who Is Affected by MTD ITSA 2026?
MTD ITSA is being rolled out in three phases based on income level:
Phase | Date | Who Is Affected |
Phase 1 | 6 April 2026 | Income over £50,000 (self-employment and/or property) |
Phase 2 | 6 April 2027 | Income between £30,000 and £50,000 |
Phase 3 | 6 April 2028 | Income over £20,000 |
Important note: ‘income’ here refers to your total qualifying gross income from self-employment and/or property — before expenses. So if you earn £45,000 from freelancing and £8,000 from a rental property, your qualifying income is £53,000, placing you in Phase 1.
What Exactly Changes Under MTD ITSA 2026?
Under the old system, you filed one Self Assessment return by 31 January each year. Under MTD ITSA, the process becomes:
1. Digital Record Keeping
All income and expenses must be recorded digitally throughout the year using HMRC-compatible software. Shoebox receipts and paper spreadsheets are no longer acceptable.
2. Quarterly Updates
You must submit four quarterly updates to HMRC each tax year, summarising your income and expenses for that quarter. These are not full tax returns — think of them as regular check-ins.
3. End of Period Statement (EOPS)
At the end of the tax year, you submit an End of Period Statement confirming your final figures, including any adjustments such as capital allowances.
4. Final Declaration
This replaces the traditional Self Assessment return. It confirms your overall tax position for the year, including all income sources.
In short: instead of 1 submission per year, you now have up to 5 submissions per year. The quarterly updates are new — the annual declaration remains, just in a new format. |
What Software Do You Need?
HMRC will not accept direct submissions from standard spreadsheets. You must use software that is recognised and compatible with MTD for Income Tax. Popular options include:
- QuickBooks Online
- Xero
- FreeAgent
- Sage Accounting
- Various other HMRC-recognised providers
Choosing the right software depends on your business complexity, budget, and whether you work with an accountant. At Accounting Crunchers, we can advise on the best solution for your specific situation and help set everything up correctly from day one.
5 Common MTD ITSA 2026 Mistakes to Avoid
1. Thinking It Doesn’t Apply to You
Many sole traders and landlords are unaware they now fall into scope. Don’t assume — check your qualifying income against the thresholds above.
2. Waiting Until the Deadline
If you’re in Phase 1, the deadline has already passed. Getting set up quickly is critical to avoid penalties.
3. Mixing Up Income Streams
You must maintain separate digital records for each income stream — for example, self-employment income must be kept separate from property income.
4. Using Non-Compatible Software
Not all accounting software is MTD-compatible. Always check HMRC’s approved software list before committing to a product.
5. Submitting Incomplete Quarterly Updates
While quarterly updates don’t need to be perfect, they must include all income and expenses for that period. Leaving items out and fixing them at year-end can cause complications.
What Are the Penalties for Non-Compliance?
HMRC has introduced a points-based penalty system for MTD ITSA. Every late submission earns penalty points, and once you accumulate enough points, financial penalties kick in:
- 1 point per late quarterly submission or late final declaration
- Once you reach 4 points: a £200 financial penalty
- Further late submissions after that: additional £200 penalty each time
Points expire after a period of compliance — but prevention is far better than cure. A good accountant will ensure your submissions are made accurately and on time.
How Accounting Crunchers Can Help
Navigating MTD ITSA doesn’t have to be stressful. Our team has been preparing clients for this change, and we offer a full suite of support:
- Software selection and setup — we’ll identify the right MTD-compatible software for your business
- Digital bookkeeping — our team can handle your records so every transaction is captured correctly
- Quarterly update submissions — we manage all four quarterly updates on your behalf
- End of Period Statements and Final Declarations — fully handled, on time, every time
- Tax planning — we don’t just keep you compliant, we look for opportunities to reduce your tax bill legally
Already working with another accountant? We make switching seamless. Our onboarding team liaises directly with your current accountant to transfer all records — no disruption to your business. |
Frequently Asked Questions
Do I need to register with HMRC for MTD ITSA separately?
Yes. If you meet the income threshold, you need to sign up for MTD ITSA through HMRC’s online services or via your accountant. Your accountant can handle this on your behalf.
What if my income fluctuates year to year?
HMRC determines your threshold based on your most recent Self Assessment return. If your income drops below the threshold in a future year, you may be able to exit MTD ITSA — but you should take advice before doing so.
Can I still use a spreadsheet?
Not directly. However, some bridging software allows you to connect a spreadsheet to HMRC’s systems. This can work as a short-term solution, but dedicated accounting software is more reliable and efficient long-term.
What if I miss a quarterly deadline?
You’ll receive a penalty point. Contact your accountant immediately and submit as soon as possible to avoid further points accumulating.
Conclusion: Don't Navigate MTD ITSA Alone
Making Tax Digital for Income Tax is the most significant change to UK self-assessment in decades. For self-employed individuals and landlords, the shift to quarterly digital reporting is a major operational change — but with the right support, it can actually make your financial management cleaner and more efficient throughout the year.
At Accounting Crunchers, we’re here to take the complexity off your plate entirely. Whether you need help getting set up, want us to handle your quarterly submissions, or are looking for a full-service accounting partner, we’ve got you covered.
Ready to get MTD-compliant? Contact Accounting Crunchers today for a free consultation. Call us on +44 73 6035 8961, email info@accountingcrunchers.com, or visit accountingcrunchers.com |
