Creating Your MTD Transition Plan: A Step-by-Step Guide
How to move from Self Assessment to Making Tax Digital – phased approach for 2026, 2027, and 2028
Making Tax Digital (MTD) for Income Tax represents the most significant change to the Self Assessment system since its introduction in 1997 [citation:5]. From April 2026, approximately 795,000 sole traders and landlords with income over £50,000 will need to move from annual tax returns to quarterly digital updates [citation:7]. This step-by-step transition plan will guide you through every phase of the journey from Self Assessment to full MTD compliance.
Phase 1: Understanding Your Position (Now – March 2026)
Step 1: Determine Your Start Date
Your mandatory start date depends on your combined gross income from self-employment and property [citation:2]:
| Income Threshold | Mandatory From | Based on Tax Year |
|---|---|---|
| Over £50,000 | 6 April 2026 [citation:5] | 2024/25 income [citation:9] |
| £30,001 – £50,000 | 6 April 2027 [citation:2] | 2025/26 income [citation:2] |
| £20,001 – £30,000 | 6 April 2028 [citation:2] | 2026/27 income [citation:2] |
Example: Calculating Qualifying Income
A client with £35,000 from self-employment and £20,000 from rental property has combined income of £55,000 – therefore within scope for April 2026 [citation:7].
Step 2: Review Your Current Record-Keeping
Assess how you currently manage your financial records [citation:10]:
- Paper-based: Manual ledgers, receipts in shoeboxes, handwritten records
- Spreadsheet user: Excel or Google Sheets for income and expense tracking
- Partial digital: Some use of accounting software but not fully integrated
- Fully digital: Already using cloud accounting software with bank feeds
If you’re already using MTD for VAT, you’re ahead of the curve – these clients will find the transition easier [citation:7].
Step 3: Segment Your Client Base (For Accountants)
Practices should categorise clients based on income thresholds and current record-keeping practices [citation:7]. Prioritise engagement with those least prepared and start implementing digital solutions immediately [citation:7].
Phase 2: Choosing Your Digital Tools (Q1 2026)
Step 4: Select MTD-Compatible Software
You must use HMRC-approved software that can [citation:2]:
- Create and maintain digital records
- Submit quarterly updates to HMRC via API
- Prepare your final digital declaration
| Software Option | Best For | Considerations |
|---|---|---|
| Cloud Accounting (e.g., Sage, Xero, QuickBooks) | Most businesses – all-in-one solution [citation:8] | Automatic bank feeds, receipt scanning, quarterly reminders |
| Free MTD Software (e.g., Sage Individual Free) | Non-VAT registered sole traders with simple affairs [citation:6] | Basic functionality for record-keeping and returns |
| Bridging Software | Spreadsheet users who can’t abandon existing systems [citation:8] | Stopgap only – no copy/paste allowed, digital linking required [citation:3] |
Manual copying and pasting between spreadsheets is not permitted. All data transfers must use digital links. Bridging software is a short-term fix – full MTD-compatible accounting software is the recommended long-term solution [citation:3][citation:8].
Step 5: Test Your Software Choice
Sign up for free trials and test at least one MTD-compatible software package before committing [citation:8]. Consider [citation:7]:
- Does it suit your business type (sole trader vs landlord vs both)?
- Is there a mobile app for on-the-go recording?
- Can your accountant access it easily?
- Does it handle both quarterly updates and final declaration?
Phase 3: Registration and Setup (March – April 2026)
Step 6: Register for MTD
If you’re already using Self Assessment, you won’t be automatically transferred – you must sign up for MTD through GOV.UK [citation:8]. Your accountant can handle registration on your behalf, but you’ll need to authorise them in the MTD-ready software [citation:8].
If you’re starting a new sole trader or landlord business, you must complete at least one year using Self Assessment first. HMRC will then write to you confirming when you need to move to MTD [citation:8].
Step 7: Set Up Your Digital Records
Configure your chosen software to [citation:10]:
- Link to your business bank account for automatic transaction feeds
- Set up income and expense categories that match your business needs
- Configure receipt scanning for paperless record-keeping
- Establish digital links between any connected systems
Digital records must be maintained on a transaction-by-transaction basis, including the amount, date, and category of each income or expense item [citation:2].
Phase 4: Quarterly Updates and Ongoing Compliance (From April 2026)
Step 8: Understand the New Timeline
The tax year is split into four quarters, each with a submission deadline [citation:9]:
| Quarter | Period Covered | Submission Deadline |
|---|---|---|
| Quarter 1 | 6 April – 5 July (or 1 April – 30 June if electing calendar quarters) | 7 August [citation:9] |
| Quarter 2 | 6 July – 5 October | 7 November [citation:9] |
| Quarter 3 | 6 October – 5 January | 7 February [citation:9] |
| Quarter 4 | 6 January – 5 April | 7 May [citation:9] |
Step 9: Submit Your First Quarterly Update
Your quarterly update is a summary of income and expenses for that period – it doesn’t require 100% accuracy (adjustments can be made later), but must be submitted on time [citation:8].
Once you provide an update, HMRC will estimate how much tax you’ll owe based on the information provided [citation:8]. This helps with cash flow planning and avoiding surprises at year-end.
Step 10: Prepare for the Final Declaration
After all four quarterly updates are submitted, you must file an MTD Tax Return/Final Declaration by 31 January following the end of the tax year [citation:9]. This pulls together [citation:9]:
- Your quarterly figures
- Other taxable income (savings, dividends, etc.)
- Gains, reliefs, or claims
This replaces the current annual Self Assessment tax return [citation:9].
Even though you’ll send quarterly updates, you won’t make payments based on them. You’ll still pay any tax owed by 31 January, including any payments on account [citation:6]. Only the way you report income is changing – not when you pay [citation:6].
Special Considerations and Exemptions
Multiple Income Sources
If you run more than one self-employed business (e.g., two separate trades) or have both self-employment and property income, HMRC looks at all income together to determine your start date [citation:6]. You’ll need to submit separate quarterly updates for each income source, then one combined final declaration [citation:2].
Exemptions and Postponements
Some taxpayers may be exempt or receive postponed start dates [citation:2]:
- Digital exclusion: Age, disability, location, or religious beliefs preventing digital use (apply to HMRC with evidence)
- Automatic postponement to 2027: If you claimed averaging relief, qualifying care relief, received trust/estate income, or completed SA109 (non-UK residents) on your 2024/25 return [citation:2]
- Partners and LLP members: Not currently required to comply unless they have other relevant income [citation:2]
Your Complete Transition Timeline
Now – Mar 2026
✓ Check income threshold
✓ Review records
✓ Choose software
✓ Sign up for trials [citation:7]
Mar – Apr 2026
✓ Register for MTD
✓ Set up software
✓ Configure bank feeds
✓ Train team [citation:10]
Apr – Jul 2026
✓ First quarter begins
✓ Record all transactions
✓ Test processes [citation:10]
Aug 2026
✓ First quarterly update due
✓ Review and adjust [citation:9]
Common Pitfalls to Avoid
- Leaving it too late: Onboarding one client for MTD can take up to half a day – start now [citation:4]
- Assuming automatic transfer: You must actively register for MTD – it doesn’t happen automatically [citation:8]
- Spreadsheet copy/paste: Manual copying between spreadsheets breaks digital linking rules [citation:3]
- Treating quarterly updates as optional: They’re mandatory, even in quiet periods [citation:2]
- Ignoring multiple income sources: Separate updates needed for each business/property [citation:2]
- Forgetting the soft-landing period: 2026/27 offers no penalties for late quarterly updates, but final declarations and payments ARE still penalised [citation:5]
Support Options: Choose Your Path
| Support Level | Description | Best For |
|---|---|---|
| Do It With Me | Guided setup, training, ongoing support [citation:1] | Those wanting confidence and assistance |
| Do It For Me | Fully managed digital reporting [citation:1][citation:2] | Clients who want complete outsourcing |
| Do It Alone | Tools and templates to prepare independently [citation:1] | Confident, tech-savvy individuals |
Even if you choose to do it alone, you can still use MTD-compatible software without an accountant – it’s designed to be straightforward [citation:6].
The Benefits of Early Preparation
- Peace of mind: Knowing your tax processes are streamlined [citation:10]
- Better financial insight: Real-time visibility of income and expenses [citation:8]
- Avoid last-minute stress: The soft-landing period helps, but early preparation is better [citation:1]
- Identify issues early: Testing processes ahead of deadlines allows troubleshooting [citation:10]
- Build confidence: Using digital tools before mandatory start date makes the transition smoother [citation:1]
Need Help Creating Your MTD Transition Plan?
Whether you’re in the first wave (April 2026) or preparing for 2027/2028, our team can help you navigate every step of the journey from Self Assessment to MTD. We offer tailored support packages to match your needs and confidence level.
Book Your MTD Transition ConsultationReferences
1. Affinia. (2026). Your Making Tax Digital Roadmap. Available at: https://www.affinia.co.uk/resources/news/your-making-tax-digital-roadmap/ [citation:1]
2. Hazlewoods. (2026). Your guide to Making Tax Digital for income tax. Available at: https://www.hazlewoods.co.uk/insights/tax/your-guide-to-making-tax-digital-for-income-tax/ [citation:2]
3. Sage. (2026). MTD for Income Tax: How to switch your practice from Self Assessment. Available at: https://www.sage.com/en-gb/blog/mtd-for-income-tax-switching-your-practice-from-self-assessment/ [citation:3]
4. Accountancy Age. (2025). Your guide to Making Tax Digital for Income Tax. Available at: https://www.accountancyage.com/2025/09/24/your-guide-to-making-tax-digital-for-income-tax/ [citation:4]
5. Simply Business. (2026). New tax laws for businesses in 2026 – MTD is on the way. Available at: https://www.simplybusiness.co.uk/knowledge/business-tax/new-tax-laws-for-businesses/ [citation:5]
6. Sage. (2026). MTD for Self Assessment. Available at: https://www.sage.com/en-gb/making-tax-digital/self-assessment/ [citation:6]
7. AAT Comment. (2025). Action Plan: Preparing for MTD for IT. Available at: https://www.aatcomment.org.uk/accountancy-resources/making-tax-digital/action-plan-preparing-for-mtd-for-income-tax/ [citation:7]
8. Sage. (2025). MTD for Income Tax: How to switch from Self Assessment. Available at: https://www.sage.com/en-gb/blog/mtd-for-income-tax-switching-from-self-assessment-explained/ [citation:8]
9. RBP. (2025). Understanding Making Tax Digital for Income Tax Self Assessment (MTD). Available at: https://www.rbp.co.uk/news/understanding-making-tax-digital-for-income-tax-self-assessment-mtd [citation:9]
10. Affinia. (2026). How to prepare for Making Tax Digital: A step-by-step guide. Available at: https://www.affinia.co.uk/resources/news/how-to-prepare-for-making-tax-digital-a-step-by-step-guide/ [citation:10]
