Making Tax Digital for Income Tax: Who It Affects and How to Prepare

Making Tax Digital for Income Tax (often shortened to MTD for Income Tax or MTD ITSA) is HMRC’s move toward a more digital, “real-time” style of reporting for sole traders and landlords. Instead of keeping records in a mix of spreadsheets, paper files, and a once-a-year tax return scramble, you’ll keep digital records and send quarterly updates to HMRC using compatible software.

This change is significant—not because you’ll suddenly pay tax four times a year (you won’t), but because the way you record and report income and expenses will change, and it will take a bit of setup to get it right.

Below is a clear, practical guide to what MTD for Income Tax is, who it affects first (and when), how to prepare without stress, and the common mistakes we see—plus how IR Advisory can help you stay compliant and confident.

What MTD for Income Tax is

1) Digital records (the foundation)

Under MTD for Income Tax, you’ll need to create and maintain digital records of your self-employment and/or property income and expenses using software that works with the MTD service.

If you use one software product to do everything (record-keeping, quarterly updates, and year-end submission), you generally don’t need to worry about linking multiple systems together—your software will handle the process end-to-end.

2) Quarterly updates (four times a year)

Instead of reporting only once a year, you’ll send quarterly updates for each income source (for example, one self-employment business and one property portfolio). These quarterly updates summarize income and expenses for the period.

HMRC sets standard quarterly periods and deadlines, and your software will guide you through what to submit and when.

3) Year-end finalisation still happens

MTD does not remove the need to finalise your position after the tax year ends. You’ll still complete the year-end steps through your software (often described as finalising your business/property figures and then making a final declaration). The key point is: quarterly updates help keep things up to date, but the year-end process is where everything is confirmed.

4) You can use an accountant/agent (and many people should)

You can handle MTD yourself, or authorise an agent to do it for you. HMRC confirms you (or your agent) will use commercial software to keep records, send quarterly updates, and submit the year-end return.

---

Who Must Comply First and Key Dates

Eligibility is based on your qualifying income from self-employment and property (combined), and HMRC has set staged start dates depending on income level.

Key thresholds and start dates (current published position)

• If your qualifying income is over £50,000 in the 2024–2025 tax year → you’ll need to use MTD for Income Tax from 6 April 2026.
• If your qualifying income is over £30,000 in the 2025–2026 tax year → you’ll need to use it from 6 April 2027.
• For £20,000: the government has set out plans to introduce legislation to lower the threshold further (commonly discussed as a later phase).

Who does this typically affect

You’re most likely to be in scope if you are:

• A sole trader (self-employed) with turnover/income above the threshold, and/or
• A landlord with property income above the threshold.

Importantly, it’s the combined qualifying income from self-employment and property that determines whether you meet the threshold.

Signing up and “getting ahead of it”

HMRC encourages businesses to sign up before they’re mandated, so they are prepared. If you use an agent, the agent can sign you up instead.

There are also transitional points around penalties: for example, HMRC states it will not apply penalty points for late quarterly updates for the first tax year (2026–2027) for those mandated from April 2026 (while penalties can still apply for late annual returns or late payment).

---

Practical preparation checklist

The best way to prepare is to treat MTD like a small “systems upgrade” to your business finances. Here’s a practical, step-by-step checklist that works well for most sole traders and landlords.

1) Confirm if you’re likely in scope

• Add up your self-employment + property qualifying income.
• Check whether you’re above £50k (for April 2026) or £30k (for April 2027) based on the relevant tax year.

If you’re close to the threshold, plan anyway—because even if you’re not mandated in the first wave, getting organised early makes everything easier.

2) Choose MTD-compatible software

You’ll need commercial software that works with MTD for Income Tax. HMRC maintains guidance on software requirements and compatibility.

When choosing software, consider:

• Is it suitable for sole traders, landlords, or both?
• Does it support bank feeds, invoicing, receipt capture, and reporting?
• Will you use it yourself, or do you want your accountant to manage it?

Tip: If you already use bookkeeping software, check whether your current provider has an MTD ITSA solution or upgrade path.

3) Set up your record-keeping routine

Quarterly updates become painless when your bookkeeping is steady. A simple routine looks like:

• Weekly: capture receipts / categorise expenses
• Monthly: reconcile bank transactions, review income
• Quarterly: review reports, submit update

Even 15–30 minutes per week can remove the year-end panic.

4) Separate business finances (if you haven’t already)

This isn’t a formal MTD “rule” for everyone, but in practice it’s one of the biggest efficiency upgrades you can make:

• Separate bank account (and card if possible)
• Cleaner records
• Faster quarterly submissions
• Fewer errors and missed expenses

5) Decide whether to use an agent

MTD introduces more regular reporting, so many business owners will prefer an agent relationship where:

• You keep records during the quarter
• Your accountant reviews and submits
• Year-end is completed correctly with reliefs and claims

HMRC confirms an agent can act on your behalf, using compatible software.

6) Plan your first “test quarter” before the deadline

If you’re mandated from April 2026, treat late 2025/early 2026 as your rehearsal:

• Choose software
• Run a trial month of bookkeeping
• Do a mock quarterly review with your accountant (or yourself)

This is the easiest way to find gaps before it “counts.”

---

Common mistakes to avoid

Mistake 1: Waiting until the last month

MTD is not just “a new form.” It’s a workflow change (software + routine + quarterly rhythm). The earlier you set up, the easier it feels.

Mistake 2: Choosing software that doesn’t match your situation

Some tools are great for sole traders but awkward for landlords with multiple properties or for people with both business and property income. Pick what fits your reality.

Mistake 3: Treating quarterly updates like mini tax returns

Quarterly updates are regular submissions of your income/expense summaries. They’re not meant to be perfect final figures, but they should be accurate and supported by good records. HMRC explains that quarterly periods help you correct errors throughout the year, without needing to resend the original update after correction.

Mistake 4: Not understanding “separate sources”

If you have multiple income sources (for example, self-employment + property), you’ll send updates for each.
This is where a structured setup (and professional oversight) prevents confusion.

Mistake 5: Missing deadlines because records aren’t up to date

Quarterly reporting punishes “messy bookkeeping.” The fix is simple: build a habit (weekly/monthly), so quarterly is just a review and submission.

---

How IR Advisory helps

At IR Advisory, we make MTD ITSA straightforward by focusing on three things: setup, systems, and support.

1) MTD readiness review

We’ll confirm:

• Whether you’re likely to be mandated in April 2026 or April 2027 based on HMRC’s thresholds
• What income sources do you need to report
• What your current bookkeeping looks like (and what needs improving)

2) Software selection and setup

We help you select compatible software that suits your business and reporting needs, then:

• Set up your chart of accounts/categories
• Configure bank feeds
• Create a clean routine for receipts and expenses
• Make sure you’re ready for quarterly submissions using software that works with the MTD service

3) Quarterly updates + year-end completion

You can choose the level of support:

• Review & submit: you keep records, we check and file quarterly
• Fully managed: we handle bookkeeping and submissions
• Training + oversight: we train your team and provide monthly checks

4) Error prevention and peace of mind

We help you avoid the most common (and costly) problems:

• Misclassified expenses
• Incomplete records
• Missed deadlines
• Unclaimed reliefs at year-end

---

Final thoughts

Making Tax Digital for Income Tax is a major shift for sole traders and landlords, especially those who’ve relied on annual Self Assessment routines. But with the right software, a simple record-keeping habit, and support where needed, it can actually make your finances clearer and your year-end far less stressful.