From 6 April 2026, HMRC will require sole traders and landlords with qualifying income over £50,000 to use Making Tax Digital (MTD) for Income Tax. That means every item of business or property income and expense must be captured digitally, reported quarterly, and submitted through HMRC-recognised software.

For most small businesses, the familiar Self Assessment annual return will be replaced by a cycle of four quarterly digital updates plus a year-end Final Declaration. If you run a 10-to-25-seat operation, or a sole-traded consultancy, this is not a tax-only question. It is an IT systems question — one that will affect your bookkeeping workflow, your software stack, and how data moves between the tools you already use.

The deadline is fixed. HMRC has confirmed it will begin auto-signing up non-compliant businesses from September 2026. Choosing and setting up compatible software before April is the only way to avoid the rush.

What is MTD for Income Tax, in practice?

Making Tax Digital for Income Tax is the government's replacement of the annual Self Assessment return for qualifying sole traders and landlords. Rather than one return due by 31 January, businesses will maintain digital records and submit four quarterly summaries of income and expenses to HMRC, followed by a Final Declaration at the end of the tax year.

The three practical requirements are:

• Digital records. Every transaction tied to your self-employment or property must be captured in MTD-compatible software within a reasonable time of being incurred. Paper cashbooks no longer satisfy HMRC's record-keeping requirement.

• Digital links. Data must transfer digitally between your records and HMRC. Manual transcription or copy-and-paste between spreadsheets does not meet the requirement. This is what HMRC calls the "digital link" rule.

• Quarterly updates and a Final Declaration. You (or your agent) send four summaries to HMRC during the tax year, then a Final Declaration that replaces the old Self Assessment return. The deadline for the Final Declaration remains 31 January following the end of the tax year.

You do not need to create digital records for other income sources such as pensions, dividends, or savings. These must still be reported on your Final Declaration, but they do not need to flow through the digital record-keeping system.

GOV.UK guidance on what MTD for Income Tax requires

Do you need new software, or can you extend what you already use?

If your business is already VAT-registered, you are likely using software that keeps digital records for VAT returns. Many of those same products are now HMRC-recognised for MTD for Income Tax. Check first whether your current software provider has extended MTD compatibility to its Income Tax module before assuming you need a new tool.

If you are not VAT-registered or you use different software for each compliance task, you will need to select a product that handles Income Tax. HMRC publishes a list of recognised software through its online software finder tool. All listed products have passed HMRC's recognition process.

There are two types of MTD-compatible software:

Software that creates digital records. These are full bookkeeping packages (Xero, QuickBooks Online, FreeAgent, Sage Accounting, Clear Books, Dext) that let you record income and expenses, send quarterly updates to HMRC, and submit your Final Declaration — often all in one product. Many also offer receipt scanning, bank-feed integration, or manual entry workflows.

Bridging software. If you prefer to keep records in spreadsheets, bridging software connects to them and submits the required data to HMRC. Examples include tools like 123 Sheets, Coconut, and APARI Pro. Bridging does not replace your spreadsheets — it creates the digital link between them and HMRC's system.

You can use more than one product if you have separate income streams (for example, a sole-traded service business plus a property rental). But you may only use one product for each individual submission to HMRC. You cannot send quarterly updates for property income using two different software products.

If you think your income sources will change — perhaps you are considering starting a second business — check that your chosen software supports that source before committing.

HMRC's MTD software finder

What does the digital link rule actually mean for your IT setup?

The digital link requirement is where most small businesses encounter their first practical hurdle. HMRC expects that data flows digitally from the point of record creation through to submission. You cannot type figures from a paper logbook into your software, nor can you copy-and-paste values between spreadsheets.

In practice, this means:

• If you start records in spreadsheets, you need bridging software to create the digital link to HMRC.

• If you use a bookkeeping package, the link is built in — the software sends data directly to HMRC's API.

• If you receive income by cash or cheque, you must still enter it into compatible software as soon as reasonably practicable. The act of typing the figure into the software satisfies the requirement; what is not allowed is creating the record outside the system and manually transcribing it later.

This is not a minor compliance detail. It determines which software you can use, whether your current accountant's workflow will continue to work, and how your internal team captures transactions day to day.

GOV.UK guidance on digital records

How does MTD for Income Tax affect your existing IT stack?

Most SMEs in the 10-to-25-seat range rely on Microsoft 365 as their core platform. Your team's day-to-day files, emails, and communication will sit there. The question is whether your current M365-centric stack can support MTD compliance without creating a parallel system.

A practical approach is to consolidate wherever possible. If your business already uses a cloud accounting package as part of your M365 ecosystem, verify that the same package supports MTD for Income Tax. If it does, you reduce the number of systems your team manages and minimise the risk of data falling through the gaps between disconnected tools.

Where you already maintain records in spreadsheets — a common pattern in smaller businesses — bridging software adds a second tool to your stack. That is acceptable under the rules, but it means an extra subscription, an extra account to manage, and an extra point where data must be kept current.

If your business has not yet moved to cloud-based financial systems, MTD for Income Tax is a strong practical reason to do so now. Spreadsheets are not forbidden; they are simply not sufficient on their own. The minimum requirement is a digital link, and a purpose-built accounting package is usually the cleanest way to achieve it.

What happens if you do not sign up?

HMRC has made clear it will not wait for every qualifying business to come forward voluntarily. From September 2026, HMRC will begin to sign up anyone who needs to use MTD for Income Tax and has not done so themselves.

When HMRC auto-signs you up, it uses only the information it already holds. This may not reflect recent changes to your circumstances, income sources, or tax situation. You will then need to check and update the information in the HMRC service, or contact HMRC directly if changes are required.

HMRC will not apply penalty points for late quarterly updates during the first tax year (2026 to 2027). Penalties will still apply for late tax returns or if you pay your tax bill after the due date. But relying on a grace period is not a strategy — it is a recognition that HMRC expects businesses to prepare.

You must also be registered for Self Assessment and have submitted a tax return in the last two years to sign up. If you are unsure whether you qualify, GOV.UK publishes a check-your-eligibility tool and a list of exemptions.

Where to start

The threshold does not apply to everyone. Sole traders and landlords with qualifying income under £50,000 for the 2024 to 2025 tax year are not required to join MTD until April 2027 (when the threshold drops to £30,000) or April 2028 (£20,000). But if you are above the threshold, the clock is ticking.

The first step is to establish your qualifying income for the current tax year. Qualifying income is your total income from self-employment and property, calculated before expenses (your turnover), based on the tax return you submitted last year.

Once you know you need to comply, the sequence is:

1. Review your existing software for MTD for Income Tax compatibility.

2. Select an HMRC-recognised product that supports all your income sources.

3. Test the software with live data before the April deadline.

4. Confirm your accountant or agent can submit quarterly updates on your behalf if they do so now.

HMRC is not recommending any particular product or provider. The choice depends on your existing stack, your accountant's preferences, and the features that match your workflow. But the decision needs to be made before April, not after.

If you want to understand your current IT readiness and how it aligns with what MTD requires, book a Security Triage Call. It is the quickest way to establish where your systems stand and what steps need to happen before the deadline.

FAQ

Do spreadsheets still work for MTD for Income Tax?

Yes, but only if you pair them with bridging software that creates the required digital link to HMRC. Spreadsheets on their own do not meet the digital records requirement. Bridging tools such as 123 Sheets or Coconut connect to your spreadsheets and submit quarterly updates on your behalf.

Will my existing VAT software handle MTD for Income Tax too?

Many software providers that are already HMRC-recognised for VAT have extended their MTD recognition to Income Tax. Check with your provider directly, or use HMRC's software finder to confirm whether your current product covers both compliance tasks.

What if I have both a business and rental property?

You can use separate HMRC-recognised software products for each income source. For example, you could use one package for your self-employment records and a different product for your property income. However, you may only use one product per income source for each submission — you cannot split quarterly updates for property income across two tools.

How much will MTD-compatible software cost?

Some providers offer free products for users with simple tax affairs, though these may have transaction limits. Paid packages from providers such as Xero, QuickBooks, or FreeAgent typically range from modest monthly subscriptions upward. Check each provider's pricing page for what is included and what restrictions apply to free tiers.

When does MTD for Income Tax actually start?

The mandatory deadline is 6 April 2026 for sole traders and landlords with qualifying income over £50,000 in the 2024 to 2025 tax year. HMRC will start auto-enrolling non-compliant businesses from September 2026. If your income falls below the threshold now, the mandatory date moves to April 2027 (£30,000) or April 2028 (£20,000).