Making Tax Digital for Income Tax Has Arrived: What Sole Traders and Landlords Need to Know

Making Tax Digital for Income Tax, often shortened to MTD for ITSA, has now become mandatory for the first wave of sole traders and landlords, having come into effect at the start of this tax year. If you're affected and haven't yet made the switch from an annual Self-Assessment return to the new quarterly reporting system, or you're unsure whether you're caught by the rules at all, here's a plain-English look at what's actually changed.

Who Is Affected Right Now

The rules apply based on your qualifying income from self-employment and property, assessed using the figures from your 2024/25 Self-Assessment return. If that income was above £50,000, you're now required to follow the new MTD for Income Tax rules rather than filing a traditional annual return. A second wave, covering those with qualifying income above £30,000, is due to join the following year, so if you're below the current threshold but above that lower figure, this is very much worth planning for even though it doesn't apply to you just yet.

It's worth being clear about what "qualifying income" means here - it's your gross income from self-employment and property before expenses, not your profit. A landlord with substantial rental turnover but modest profit after mortgage interest and other costs can still be well within the mandatory threshold, which catches some people out if they've only ever thought in terms of taxable profit.

What Actually Changes

The headline change is that instead of a single annual Self-Assessment return, you now need to keep digital records and submit a summary of your income and expenses to HMRC four times a year, using MTD-compatible software, followed by a final declaration after the tax year ends. Each quarterly update is a running total for the year to date within that category of income, rather than a full tax calculation - the more detailed adjustments, reliefs and final figures are still confirmed at the year end through what's called the final declaration.

This is a genuinely different way of working for anyone used to gathering everything together once a year. Instead, records need to be kept up to date throughout the year and submitted roughly every three months, which means the days of reconstructing a year's paperwork from a shoebox of receipts in January are effectively over for anyone within scope.

Getting the Right Software in Place

Because paper records and spreadsheets alone are no longer sufficient on their own, compatible software is now essential rather than optional for anyone in scope. Most mainstream cloud accounting platforms now offer MTD for Income Tax functionality, and the right choice will depend on how complex your income sources are - a sole trader with a single business is a much simpler setup than a landlord with several properties plus a small self-employed sideline. If you haven't yet chosen or set up compatible software, this should be an immediate priority given the quarterly submission clock is already running for this tax year.

What Happens If You Miss a Quarterly Update

HMRC's new points-based penalty system applies to MTD for Income Tax in the same way it now applies to VAT. Each missed submission earns a penalty point, and once you reach a certain threshold - four points for those on a quarterly reporting cycle - a financial penalty is triggered, with the points resetting after a period of consistent, timely compliance. This is a more forgiving system than an automatic fine for every single miss, but it's still designed to encourage genuine, ongoing discipline around record keeping rather than a return to old habits of catching up once a year.

Property Income Needs Particular Care

If you're a landlord with more than one property, or a mix of property and self-employed income, the way MTD splits reporting by income source can add complexity that wasn't there under the old single annual return. Each quarterly update needs to reflect the correct category of income accurately, which makes good bookkeeping habits - separate records for each source, expenses allocated correctly as they occur - more important than ever.

If You're Not Yet in Scope

If your qualifying income currently sits below £50,000, you have a little time before the rules extend to the £30,000 threshold, but it's worth using that time productively rather than waiting until the deadline is imminent. Moving to digital record-keeping now, well ahead of when it becomes compulsory, means you'll already have good habits and the right software in place by the time you're required to submit quarterly, rather than trying to learn a new system and meet your first deadline in the same few weeks.

Getting Comfortable with the New Rhythm

For anyone newly within scope, the biggest adjustment isn't really about software - it's about mindset. Tax reporting has shifted from an annual event to an ongoing quarterly habit, and the businesses managing the transition most smoothly are the ones treating their bookkeeping as a regular, small task rather than saving it up. If you'd like help getting set up properly, or want a review of whether your current software and processes are ready for your next quarterly deadline, we're here to help.