Making Tax Digital (MTD) for Income Tax:

How to Avoid Going Crazy with HMRC’s New Rules

HMRC is changing how you report your income. Making Tax Digital (MTD) replaces your annual paper or PDF tax return with regular digital submissions through approved software. If you are a freelancer, a landlord, or a sole trader, this affects you directly.

This article tells you what MTD means in practice, which software meets HMRC requirements, what happens if you miss deadlines, and how to keep your records audit-ready.

What Is Making Tax Digital, Really?

MTD started with VAT in April 2019. VAT-registered businesses with taxable turnover above the VAT registration threshold (then £85,000) were required to keep digital records and file VAT returns through compatible software. Since April 2022, that requirement covers all VAT-registered businesses, regardless of turnover. Limited exemptions exist, but you need to apply for them.

MTD for Income Tax Self Assessment (MTD for ITSA) is the next phase. Self-employed individuals and landlords with qualifying income above £50,000 (based on their 2024/25 tax year) must comply from 6 April 2026. The threshold drops to £30,000 from 6 April 2027, based on 2025/26 figures. The Government has legislated plans to reduce the threshold further to £20,000 in subsequent years.

Once you are in scope, you submit quarterly digital updates to HMRC, followed by an End of Period Statement (EOPS) and a Final Declaration. If you have both self-employment income and rental income, you file quarterly updates for each source separately.

Who Is Affected, and When?

MTD currently affects or will shortly affect:

•     VAT-registered businesses, already enrolled in MTD for VAT since 2019 and 2022.
•     Self-employed sole traders with qualifying income above £50,000, mandatory from 6 April 2026.
•     Landlords with property income above £50,000, mandatory from 6 April 2026.
•     Sole traders and landlords with qualifying income between £30,000 and £50,000, mandatory from 6 April 2027.
•     Partnerships, currently excluded from mandatory MTD for ITSA. HMRC has not confirmed a timeline for partnerships.

How qualifying income is calculated

Qualifying income is your gross receipts before expenses, not your profit. A freelance consultant who bills £55,000 in fees and deducts £15,000 in costs still has qualifying income of £55,000. That puts them in the first wave starting April 2026. HMRC determines your eligibility based on your 2024/25 tax year figures. If your return for that year is not yet filed, estimate your gross income now to know where you stand.

The Digital Reporting Transition: What Changes in Practice

Under MTD for ITSA, you submit four quarterly updates per tax year instead of one annual return. Each update is a summary of your income and expenses for that quarter. HMRC acknowledges these are working summaries. You correct errors in later quarters or during the end-of-year process. Reasonable accuracy is the standard, and a correction mechanism exists.

Quarterly deadlines for the 2026/27 tax year:

•     Quarter 1 (6 April to 5 July 2026): due 7 August 2026
•     Quarter 2 (6 July to 5 October 2026): due 7 November 2026
•     Quarter 3 (6 October to 5 January 2027): due 7 February 2027
•     Quarter 4 (6 January to 5 April 2027): due 7 May 2027

After the four quarterly updates, you complete an End of Period Statement (EOPS) to confirm your figures and claim allowances. You then file a Final Declaration, which replaces the annual Self Assessment return (SA100) for taxpayers within MTD for ITSA.

The practical difference is this: you record transactions as they happen throughout the year instead of reconstructing twelve months of activity in January. For taxpayers already using accounting software, the adjustment is small. For those who collect receipts in batches, a change in working habits is needed.

What Software Should You Use?

You need MTD-compatible software. HMRC requires submissions to be made through products that connect directly to its systems via API. A standard spreadsheet does not qualify on its own. If you prefer spreadsheets, bridging software connects your data to HMRC through a compliant digital link. This is an accepted workaround, though most accountants treat it as a short-term solution rather than a permanent one.

Widely used platforms supporting MTD for ITSA include:

•     QuickBooks Online, popular with freelancers and small businesses.
•     Xero, well suited to multiple income streams with strong bank feed integration.
•     FreeAgent, common among contractors and sole traders, and often included with business bank accounts.
•     Sage Accounting, an established option with strong VAT and MTD functionality.
•     Coconut and Kashflow, which serve specific sectors.

Before you subscribe to any platform, check it against HMRC’s official MTD-compatible software list on GOV.UK. Not every accounting app qualifies, and the list is updated regularly. Costs range from free basic tiers to £30 to £50 per month for full-featured packages. Choose software that connects to your bank, handles your income type, and categorises transactions automatically.

Penalties for Non-Compliance: What’s at Stake

Late submission penalties

HMRC now uses a points-based system for late filing. Each missed deadline earns you one penalty point. Quarterly filers reach the penalty threshold at 4 points. At that point, HMRC issues a £200 fine. Every late submission after that costs a further £200. Points expire over time, but only after a period of consistent on-time filing. The length of that period depends on how often you are required to submit.

Late payment penalties for Income Tax

Late submission and late payment are separate issues with separate rules. For Income Tax, a 5% surcharge applies to unpaid tax after 30 days. A further 5% is added after 6 months. Another 5% is added after 12 months. Interest accrues on the overdue amount from the day payment is late. These charges accumulate quickly on a large tax bill.

VAT late payment penalties follow a different scheme introduced in January 2023. If you are VAT-registered, check the current VAT-specific guidance on GOV.UK, as the structure differs from Income Tax rules.

How to Prepare for a Tax Audit

MTD gives HMRC a real-time view of your financial activity throughout the year. If HMRC opens an enquiry, the quality of your records determines how long and how costly the process becomes. Good record-keeping protects you.

Steps to keep your records audit-ready:

•     Record every income transaction and allowable expense in your MTD-compatible software as it occurs, not at quarter-end.
•     Keep source documents, including invoices, receipts, and bank statements, for at least 5 years after the 31 January submission deadline for the relevant tax year.
•     Use a dedicated business bank account. Mixed personal and business finances draw scrutiny.
•     Reconcile your software against your bank statements monthly. Small discrepancies compound over time.
•     Document the business purpose of borderline expenses such as home office costs, mileage, and equipment.
•     Respond to HMRC contact promptly. A qualified tax adviser can manage that communication on your behalf.

Top 5 Mistakes People Make When Transitioning to MTD

These are the most common errors professionals see during MTD transitions:

•     Registering too late. MTD for ITSA requires a separate sign-up from your existing Self Assessment registration. HMRC’s private beta is already open, but eligibility criteria apply. Missing the sign-up window means missing your first quarterly deadline.
•     Using non-approved software. Not every accounting app meets HMRC’s requirements. Check the official GOV.UK list before you commit to a subscription.
•     Batch-processing transactions at quarter-end. Recording three months of activity in one sitting creates errors and defeats the purpose of digital record-keeping. Log transactions as they happen.
•     Overlooking the exemption process. HMRC grants digital exclusion exemptions for lack of internet access, disability, age, religious grounds, or remote location. If any of those apply to you, apply formally and early. The exemption is not automatic.
•     Conflating income sources. If you have both self-employment income and rental income, MTD requires separate quarterly updates for each. Treating them as one creates reporting errors.

Get Professional Help with MTD

MTD introduces new filing obligations, new software requirements, and new penalty rules. Getting the set-up wrong costs time and money. Getting advice early costs less than fixing mistakes after the fact.

The team at Audit Consulting Group works with UK individuals and businesses on MTD compliance, from initial registration through to HMRC enquiry support.

Their MTD services cover:

•     MTD registration and onboarding, so your sign-up is done correctly before your first quarterly deadline.
•     Software selection and setup, matched to your income type and business structure.
•     Quarterly filing support, reviewed for accuracy and filed on time.
•     Audit preparation and HMRC enquiry representation.
•     Tax planning within the MTD framework.

For more details on MTD Services, visit the ACG website.

MTD Is a Change, Not a Crisis

Making Tax Digital is a structural change to UK tax administration. It is mandatory, the deadlines are fixed, and HMRC is not extending them. For most taxpayers, it means smaller, more frequent admin tasks spread across the year instead of one large annual effort.

Taxpayers who wait until the last moment to act face the greatest risk: rushed software choices, incomplete records, missed quarterly deadlines, and penalty points that accumulate faster than expected. The time to prepare is now, before the April 2026 start date.

Choose your software now. Start recording transactions consistently. Keep your business and personal finances separate. If you are unsure about any part of the process, speak to a qualified tax adviser before your mandation date arrives.

Frequently Asked Questions

Do I need to register for MTD if I am already registered for Self Assessment?

Yes, separately. Your existing Self Assessment registration does not automatically enrol you in MTD for ITSA. HMRC runs a private beta with eligibility requirements. Check your eligibility and sign up via GOV.UK ahead of your mandation date.

Can I still use an accountant under MTD?

Yes. You appoint an agent, an accountant or tax adviser, to submit your MTD updates. HMRC supports this. Your existing Self Assessment agent authorisation is recognised, though a separate MTD enrolment step is needed.

What if I make an error in a quarterly submission?

You correct it in a later quarterly update or during the End of Period Statement process. HMRC does not impose automatic penalties for corrections made in good faith.

Is there an exemption if I am not comfortable with technology?

Yes. HMRC grants exemptions for digital exclusion based on disability, age, lack of internet access, religious grounds, or remote location. You must apply formally. The exemption is not granted by default.

What happens to my current Self Assessment return for 2024/25?

You file it as normal. MTD does not apply retroactively. If your gross qualifying income in 2024/25 exceeds £50,000, you must comply with MTD for ITSA from 6 April 2026 onwards.