MTD Expansion Timeline: Key Dates for Businesses

A strong trading year can create an unexpected compliance pressure: higher sales may bring a sole trader or landlord into Making Tax Digital for Income Tax Self Assessment. The MTD expansion timeline is now a live operational issue, not a distant policy proposal. Businesses that leave preparation until their first mandated quarter risk hurried software changes, incomplete data and less reliable management information at the point they need clarity most.

For owner-managed businesses, the practical question is not simply whether MTD applies. It is when it applies, which income HMRC uses to assess the position, and whether the current bookkeeping process can produce accurate digital records without creating more work for the business.

MTD expansion timeline: the dates that matter

Making Tax Digital for VAT has already changed the reporting routine for VAT-registered businesses. Since April 2022, most VAT-registered businesses have been required to keep VAT records digitally and submit VAT returns through compatible software, subject to limited exemptions.

The next expansion concerns Income Tax Self Assessment, commonly referred to as MTD for Income Tax or MTD ITSA. The staged timetable is based on an individual's qualifying income from self-employment and property, rather than their overall personal income or their profit after expenses.

From 6 April 2026: qualifying income above £50,000

From the 2026-27 tax year, individuals with qualifying income of more than £50,000 must use MTD for Income Tax. HMRC will normally use the income shown on the 2024-25 Self Assessment tax return to determine whether a person is required to join.

Qualifying income is the gross income from sole-trader businesses and property businesses before expenses are deducted. A consultant earning £55,000 of self-employment turnover with modest profits may therefore be mandated, while an individual with a high salary, dividends or pension income but lower qualifying income may not be within this first phase.

This distinction is particularly relevant for directors. Salary, dividends and most investment income do not count towards the qualifying-income threshold. However, a director with a side business, rental portfolio or both should consider the combined gross income from those activities carefully.

From 6 April 2027: qualifying income above £30,000

The second phase begins in the 2027-28 tax year. Individuals with qualifying income above £30,000 will enter MTD for Income Tax, based on the information reported for 2025-26.

This is likely to capture a far broader group of landlords, independent professionals and growing traders. It also means that a business approaching the threshold now should not assume it has several years to prepare. Revenue growth in one year can determine digital reporting obligations for a later tax year.

From 6 April 2028: qualifying income above £20,000

From 6 April 2028, the threshold falls again to qualifying income above £20,000. General partnerships with qualifying income above £20,000 are also due to be brought into MTD for Income Tax from this date, while the timetable for other partnership structures is expected to develop separately.

For many smaller property businesses and side ventures, this phase will be the point at which MTD becomes relevant. It is worth treating the £20,000 figure as a planning threshold rather than waiting for the final year before taking action. The records required for MTD are easier to establish gradually than under a filing deadline.

What changes once MTD for Income Tax applies?

MTD does not remove the need to report income and claim allowable expenses. It changes the route through which records are kept and information is sent to HMRC.

Businesses within scope must maintain digital records using compatible software. They will send quarterly updates of income and expenses to HMRC, then complete an end-of-year final declaration to confirm and add any other relevant tax information. This may include employment income, dividends, capital gains or reliefs where applicable.

Quarterly updates should not be confused with quarterly tax bills. They provide HMRC with a running view of business income and expenses, but they do not normally create four separate Income Tax payment dates. Existing Income Tax payment-on-account rules still matter, including the usual January and July payments where they apply.

The benefit is that records are reviewed more regularly. The trade-off is that a year-end spreadsheet tidy-up is no longer enough. Transactions need to be captured accurately throughout the year, with sales, costs, adjustments and supporting evidence properly categorised.

Why the threshold can be misleading for e-commerce businesses

For e-commerce operators, the gross-income test deserves particular attention. Marketplace settlements can make bookkeeping appear simpler because one net payment reaches the bank account. Yet the underlying figures may include gross sales, platform fees, refunds, advertising costs, delivery charges, payment-processing fees and overseas currency movements.

MTD-compatible software cannot correct an incomplete source record. If gross marketplace sales are posted as net settlements, the business may lose sight of revenue performance and create problems for VAT reporting, profitability analysis and the qualifying-income assessment.

A multi-channel retailer also needs consistent treatment across its website, marketplaces and payment providers. The right process will depend on transaction volume, VAT registrations, currencies and the quality of available data feeds. Automation can reduce manual processing, but it requires review rules and reconciliations that reflect how the business actually trades.

Preparing for the MTD timeline without disrupting operations

The most effective preparation begins with a clear view of the business's current records and likely qualifying income. Do not rely solely on profit figures from management accounts. Review gross income from each sole-trade and property activity, and consider whether combined income could bring an individual above a future threshold.

Four areas usually determine whether an MTD transition is orderly:

• Digital record quality: Bank feeds alone are not sufficient. Sales, purchases and adjustments must be recorded in a way that supports VAT, tax and management reporting.

• Software suitability: The software must be compatible with MTD for Income Tax and appropriate for the complexity of the business. A low-cost option may be adequate for a simple landlord, but not for a multi-channel retailer with inventory and overseas sales.

• Data flow and reconciliations: Marketplace, payment-provider and bank data should reconcile to the accounting system. Differences need prompt investigation, not a year-end clean-up.

• Responsibility and review: Decide who captures records, who reviews exceptions and who approves each submission. Outsourcing bookkeeping does not remove the need for informed business oversight.

For a business already using Xero or another cloud platform, the starting point may be process improvement rather than a full software replacement. Check that integrations are posting gross figures correctly, VAT codes are applied consistently and reports can separate sales, fees, refunds and taxes. A small configuration issue repeated across thousands of transactions can materially affect the figures sent to HMRC.

Exemptions, edge cases and changing circumstances

Not every taxpayer will be required to follow the standard MTD process. HMRC provides exemptions in limited circumstances, including digital exclusion where it is not reasonably practicable to use digital tools because of age, disability, remoteness of location or other reasons. An exemption is not automatic and should be considered early.

Circumstances can also change. A trader may enter MTD after a period of growth, then see income fall. A landlord may sell a property, acquire another or start trading alongside rental activity. Partnership status, jointly owned property and overseas income can add further complexity. The correct approach depends on the legal ownership, sources of income and tax position, rather than a single turnover figure viewed in isolation.

Businesses should also keep MTD for VAT and MTD for Income Tax separate in their planning. A limited company may have MTD for VAT obligations but not be caught by MTD for Income Tax in the same way as its individual director. Equally, a sole trader below the VAT registration threshold may still need MTD for Income Tax once qualifying income exceeds the relevant limit.

Use MTD as a management upgrade, not just a filing task

The strongest case for early action is commercial. Timely digital records make it easier to monitor cash flow, assess margin after marketplace fees, plan VAT payments and identify whether director drawings remain sustainable. For growing businesses, this is the information that supports decisions on stock, advertising spend, hiring and funding.

Fortis Accounting can help e-commerce and owner-managed businesses assess their MTD position, strengthen digital bookkeeping and build reporting processes that support compliance alongside better financial control. A readiness review carried out well before the next threshold applies gives management time to fix the records, not simply file them.