MTD for Income Tax Start Date Checker UK
Check when Making Tax Digital for Income Tax Self Assessment (MTD ITSA) applies to you. Answer a few questions about your income source and qualifying income to find out your mandatory start date, what software you need, and the key deadlines you must meet. HMRC is rolling out MTD for Income Tax in phases starting April 2026 for those with qualifying income above £50,000 and April 2027 for those above £30,000.
How the MTD Income Tax Start Date Checker Works
Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is the next phase of HMRC's digitisation programme that requires sole traders and landlords to keep digital records and submit quarterly updates to HMRC using compatible software. Unlike the current self-assessment system where you file a single annual tax return, MTD ITSA introduces a more frequent reporting cycle with four quarterly updates throughout the tax year followed by a final declaration. The goal is to reduce errors in tax returns, give taxpayers a more accurate picture of their tax position throughout the year, and modernise the UK tax system.
The qualifying income that determines whether MTD ITSA applies to you is your combined gross income from self-employment and property letting before any expenses or allowances are deducted. This means you need to add together your total self-employment turnover and your gross rental income to determine your qualifying income figure. If you are both a sole trader and a landlord, you combine both income streams. It is the gross figure that matters, not your net profit, so even if your expenses bring your taxable profit below the threshold, you may still be required to join MTD ITSA if your gross income exceeds the relevant limit.
MTD ITSA Phased Rollout Timeline
HMRC has confirmed a phased rollout for MTD ITSA based on qualifying income thresholds. The first wave begins in April 2026 and applies to sole traders and landlords with qualifying income exceeding £50,000. The second wave starts in April 2027 and extends the requirement to those with qualifying income above £30,000. Individuals with qualifying income below £30,000 are not yet required to join MTD ITSA, although HMRC has indicated that the threshold may be lowered further in future years. Partnerships are also excluded from the initial rollout phases, with a separate timeline to be announced.
Once you fall within the MTD ITSA mandate, you must use compatible software to maintain your business records digitally, submit quarterly updates to HMRC summarising your income and expenses for each quarter, and file a final declaration after the end of the tax year confirming your total income and claiming any reliefs or allowances. The quarterly update deadlines are fixed at the 5th of August, November, February, and May, regardless of your accounting period start date. The final declaration deadline aligns with the existing self-assessment deadline of 31 January following the end of the tax year.
What You Need to Prepare for MTD ITSA
Preparation for MTD ITSA should begin well before your mandatory start date. The first step is to identify or purchase compatible software that meets HMRC's requirements. HMRC maintains a list of recognised software providers on their website, and many popular accounting packages such as Xero, QuickBooks, FreeAgent, and Sage have already been updated to support MTD ITSA submissions. You should also review your current record-keeping practices to ensure they can transition to a fully digital workflow. Paper records and spreadsheets that are not linked to compatible software will no longer be sufficient once MTD ITSA applies to you.
If you use an accountant or tax agent, you should discuss MTD ITSA with them as early as possible. Your agent can submit quarterly updates and final declarations on your behalf using their own compatible software, but you will still need to provide them with timely and accurate income and expense data on a quarterly basis rather than once a year. This represents a significant change in the working relationship between sole traders and their accountants, and both parties need to agree on a workflow that ensures quarterly deadlines are met without unnecessary stress or last-minute rushes.
Key Differences Between MTD ITSA and Self Assessment
While MTD ITSA replaces the annual self-assessment tax return for qualifying individuals, the underlying tax calculations remain the same. You still receive a personal allowance, pay income tax at the basic, higher, and additional rates, and pay Class 2 and Class 4 National Insurance contributions on your trading profits. The key difference is the frequency and method of reporting. Instead of compiling all your records once a year and filing a single return, you report your income and expenses to HMRC four times a year through your compatible software, and then confirm everything in a final declaration. This means HMRC receives a more up-to-date picture of your tax position, and you can see an estimated tax liability throughout the year rather than receiving a single large bill in January.