How to prepare for MTD for Income Tax before your start date

Step 1 — Confirm your phase

The first thing to nail down is whether MTD applies to you, and from which 6 April. The trigger is your qualifying incomeon a specific past Self Assessment return — gross self-employment plus gross property, before any expenses.

• 2024/25 return over £50,000 → MTD from 6 April 2026.
• 2025/26 return over £30,000 → MTD from 6 April 2027.
• 2026/27 return over £20,000 → MTD from 6 April 2028.

Two things people miss. First, the test is gross and combined: a sole trader with £25,000 of turnover plus £30,000 of gross rent is at £55,000 and in scope from April 2026 — even though neither source alone would do it (GOV.UK eligibility). Second, the figure is locked to a past return: if 2024/25 puts you over, you are in MTD from April 2026 even if your income has since dropped.

Action: pull the relevant Self Assessment return, total your gross self-employment and gross property figures, and check the result against the threshold using the GOV.UK eligibility tool. If you are close to a threshold, model it carefully — this is where people get caught.

Read the full who-is-in-scope guide →

Step 2 — Decide your approach

Before you sign up, decide who is doing the work. There are three routes:

1. All-in-one MTD-compatible software. One product handles record-keeping, the four quarterly updates, and the final declaration. Best fit if you are comfortable doing your own books and want the simplest tooling stack.
2. Bridging software linked to existing digital records.If you already keep records in a spreadsheet or in a system that is not directly HMRC-recognised, bridging software connects the two and submits to HMRC. A compromise between “rip and replace” and full compliance.
3. An accountant runs the whole cycle. You hand over receipts and statements; they keep the digital records, file the four quarterly updates and the final declaration through their software. Hands-off, but you still authorise the agent inside the MTD service.

Switching mid-year is friction you want to avoid — data migration, re-authorisation, and reconciling cumulative figures so HMRC’s totals match the new software. Decide first. If you are unsure between options 1 and 3, run a 30-minute conversation with an accountant before committing.

Compare your software options →

Step 3 — Go digital early

This is the step everyone skips and everyone regrets. Start recording income and expenses digitally now— not on your start date.

The technology takes hours to set up. The habit of recording transactions weekly, categorising as you go, and reconciling to the bank statement takes months to embed. Three months of practice produces a cleaner first quarter than three weeks of panic.

The mistake to avoid: assuming “digital” means “a spreadsheet I update at year-end.” MTD compliance needs records updated as transactions happen, in software that can build cumulative quarterly summaries. If your start date is April 2027 or April 2028, the right move today is to start the habit, not buy the software.

Step 4 — Sign up and authorise

Once your phase, your approach, and your software are settled, register for the service at gov.uk/sign-up-for-making-tax-digital-for-income-tax and authorise your software (or your agent) inside the MTD service.

What you will need:

• National Insurance number.
• Unique Taxpayer Reference (UTR) — the same one used for Self Assessment.
• Accounting period (most sole traders and landlords use 6 April to 5 April).
• MTD-compatible software already chosen and ready to authorise.

Step 5 — Do a dry run

A dry run is the difference between a calm first year and a penalty point. Simulate one quarterly update in your software before any of them are mandatory:

• Pull a recent three-month period in the software.
• Reconcile every line to the bank statement.
• Generate the cumulative year-to-date figures the software would submit.
• Time how long the end-to-end process actually takes — not how long you think it should take.

You don’t send it to HMRC. You measure it. A dry run surfaces missing transactions, mis-categorised expenses, gaps between bank feed and ledger, and software workflow quirks while the cost of getting it wrong is still zero. The first real submission should not also be the first time you have done it.

Why this matters: under the points-based late-submission regime, four missed quarterly updates triggers a £200 penalty for mandated taxpayers, with further £200 penalties for each subsequent miss (ICAEW). The April 2026 soft landing covers late quarterly updates in 2026/27 only — not late payments, and not the final declaration. A dry run is the cheapest way to make sure you don’t need the soft landing in the first place.

Read the full penalty + soft-landing guide →

Useful free tools while you are preparing

Two RR calculators that pair naturally with MTD prep:

• Self Assessment tax calculator — model your next bill so the final declaration in MTD is not a surprise.
• UK tax calendar — put every quarterly deadline in your diary now, not the week before.