Making Tax Digital for Income Tax: What You Need to Know
Making Tax Digital (MTD) for Income Tax Self Assessment (ITSA) represents the most significant change to UK tax administration in a generation. Starting April 6, 2026, self-employed individuals and landlords with qualifying income exceeding GBP 50,000 must maintain digital records and submit quarterly updates to HMRC. A second wave beginning in April 2027 extends the requirement to those with income above GBP 30,000.
This is not simply a shift from paper to digital. MTD fundamentally changes how businesses interact with HMRC, requiring real-time digital record-keeping and periodic reporting that replaces the traditional annual self-assessment return.
Who Is Affected and When
The rollout follows a phased approach based on income thresholds:
- April 6, 2026: Self-employed individuals and landlords with gross income over GBP 50,000 from self-employment or property.
- April 2027: Extension to those with gross income over GBP 30,000.
It is important to note that the threshold is based on gross income, not profit. A business with GBP 60,000 in revenue but only GBP 20,000 in profit would still be within scope for the April 2026 deadline.
Core Requirements of MTD for ITSA
Digital Record-Keeping
All business records must be maintained digitally using MTD-compatible software. This includes:
- Income and expense records with dates, amounts, and categories
- Supporting documents such as invoices, receipts, and bank statements
- Capital allowance records for business assets
- Stock and inventory records where applicable
Spreadsheets can still be used, but they must connect to HMRC systems through bridging software that can transmit data via the MTD API.
Quarterly Updates
Instead of a single annual return, businesses must submit quarterly updates to HMRC summarizing income and expenses for each quarter. The quarterly periods align with the tax year:
- April 6 to July 5
- July 6 to October 5
- October 6 to January 5
- January 6 to April 5
Each update must be submitted within one month of the quarter end. An End of Period Statement (EOPS) and Final Declaration replace the traditional self-assessment return.
Digital Links
Where data is transferred between software programs or between a spreadsheet and software, the transfer must be digital. Manual re-keying of data is not permitted. This digital links requirement ensures data integrity throughout the reporting chain.
Preparing for MTD: Practical Steps
With less than two weeks until the first deadline, businesses that have not yet prepared need to act immediately:
- Choose MTD-compatible software: Ensure your accounting or record-keeping software is recognized by HMRC as MTD-compatible.
- Digitize existing records: Any paper-based records must be transferred to digital format. Scan and archive physical documents systematically.
- Set up digital links: If you use multiple systems, ensure data flows digitally between them without manual intervention.
- Register for MTD: Sign up for MTD for ITSA through your HMRC online account.
- Train your team: Ensure anyone involved in record-keeping understands the new requirements and processes.
The Broader Document Management Imperative
MTD is part of a global trend toward digital tax administration and regulatory compliance. Across the Atlantic, US firms face their own challenges with CMMC 2.0, SEC Rule 17a-4, and FINRA recordkeeping requirements. The common thread is clear: 97% of organizations have limited document management capabilities, and regulators worldwide are no longer tolerant of this gap.
For UK businesses, MTD is often the catalyst for a broader digital transformation. Once you invest in digital record-keeping for tax purposes, the same infrastructure can improve efficiency across your entire operation. Consider that 50% of workers lose 2.5 hours per week searching for documents. A well-implemented document management system pays for itself in recovered productivity alone.
How Arhivix Helps
Arhivix provides the secure digital record-keeping foundation that MTD for Income Tax demands. All documents and records are protected with AES-256 encryption, ensuring that sensitive financial data remains confidential. Records are stored on AWS S3 infrastructure, providing reliable, always-available access to your digital records when you need to submit quarterly updates or respond to HMRC inquiries.
Arhivix also maintains detailed audit trails for every document, recording when records were created, modified, or accessed. This provides the evidence trail that demonstrates your compliance with MTD digital record-keeping requirements. When HMRC reviews your records, you can show not just the data, but the complete history of how it was maintained - giving you confidence that your compliance is fully documented and verifiable.
