MTD for Income Tax Without an Accountant

Many sole traders and landlords handle their own tax affairs. MTD does not require you to appoint an agent, though you can invite one later if you want help.

What you are responsible for

As an unrepresented taxpayer you must:

1. Check whether MTD applies — usually from April 2026 if qualifying income was over £50,000 in 2024/25 (lower thresholds follow in later years).
2. Register for MTD with HMRC and choose compatible software before your first quarterly update is due.
3. Keep digital records of income and expenses for each trade and property business.
4. Send quarterly updates on time (cumulative year-to-date totals, not separate “quarter-only” figures).
5. Submit your final declaration by 31 January after the tax year ends, including any income HMRC does not already hold (employment, dividends, etc.).

Quarterly updates are not tax payments and are not full tax returns. They are summaries. Your tax bill and payment dates (31 January and 31 July payments on account) stay largely the same.

Choosing software without an accountant

You do not need full cloud accounting unless you want it. HMRC recognises:

• Bridging software — keep Excel or Google Sheets; the tool reads your figures and submits via API (Abridge is built for this route).
• All-in-one accounting — Xero, QuickBooks, FreeAgent, and similar products with bank feeds and bookkeeping.
• Specialist landlord tools if property is your main focus.

Before you subscribe, confirm the product can: create or connect digital records, send quarterly updates for every income source you have, and submit the final declaration. Use HMRC’s compatible software list as the definitive check.

See how to choose MTD software and using spreadsheets for MTD.

Registration and first steps

1. Create or use your Government Gateway account (allow time for activation codes by post if new).
2. Sign up for MTD for Income Tax on GOV.UK with your NI number, UTR, and business details.
3. Pick standard tax-year quarters (default) or calendar quarters — calendar is only for 1 April–31 March accounting periods and is locked once you file the first update of the year.
4. Connect your chosen software to HMRC.

Our how taxpayers register article walks through the detail.

Quarterly updates in practice

Each update reports running totals from 6 April (or 1 April if calendar quarters) to the quarter end. If you spot an error, you correct it in the next update by submitting revised cumulative figures — you do not file a separate “amendment” for that quarter alone.

Nil updates are required: if you had no income and no expenses in a period, you still submit a nil return or you risk a late point.

Deadlines (standard quarters): 7 August, 7 November, 7 February, 7 May (after each cumulative period end).

Read deadlines: standard vs calendar and cumulative quarterly updates.

Year-end without an agent

After your fourth quarterly update you still need to:

• Apply allowances and adjustments not done quarterly (capital allowances, private use, etc.).
• Add other income (PAYE, dividends, savings) if not already on your HMRC record.
• Claim reliefs you are entitled to.
• Submit the final declaration and pay any tax due.

If you are unsure about a figure, consider a one-off review with an accountant for the final declaration only — you do not have to use them for every quarter.

When an accountant still helps

An agent is useful if you have multiple trades, joint property splits, foreign income, complex capital allowances, or little time to maintain records. Agents use an Agent Services Account; authorising them is separate from your own MTD sign-up.

You can also appoint a supporting agent (e.g. bookkeeper) alongside a main agent — roles are limited, so agree who submits the final declaration.

Penalties and the 2026/27 grace period

Late quarterly updates in 2026/27 for April 2026 joiners attract no penalty points (HMRC grace period), but you must still file. Late final declarations and late payments are not covered by that grace.

See the penalties guide for points, payment charges, and how they reset.

Practical tips

• Reconcile bank feeds or spreadsheets monthly so quarter-ends are not a scramble.
• Keep mortgage interest on residential lets separate even if you use the three-line easement.
• Do not copy-paste totals between systems — that breaks digital links (use export/import or one connected workbook).
• Set calendar reminders a week before each deadline.