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This case study is based on genuine client work carried out by our practice. Names, figures and identifying details have been changed to protect confidentiality, and the numbers shown are representative of the situation rather than the exact amounts. Your own position will differ.
The scenario
A sole trader with about £60,000 of turnover keeps their records in a carrier bag and a spreadsheet built up over years. It has always been enough. Their accountant sorts it out once a year in a single painful session every January.
That approach stopped working on 6 April 2026.
Why they are in scope
Making Tax Digital for Income Tax applies from 6 April 2026 to sole traders and landlords with qualifying income over £50,000.
Qualifying income is gross, before expenses, and it adds together self employment and property income. This catches people out badly. Someone with £35,000 of rent and £20,000 of consultancy turnover has £55,000 of qualifying income and is mandated, even though their actual profit may be a fraction of that.
HMRC decided using the 2024/25 return. If you were close, it is worth checking rather than assuming.
What actually has to change
Digital records. The carrier bag is finished. Records must be kept digitally, in software, as you go.
Quarterly updates. Four submissions a year through compatible software, plus a final declaration replacing the old return.
The updates are not four tax returns. They are cumulative summaries of income and expenses, you are not calculating tax quarterly, and you do not pay quarterly. Payment dates have not changed at all. Errors in one quarter get corrected in the next.
The first year is a soft landing
Worth knowing before you panic. For those newly mandated there are no late submission penalties for quarterly updates during 2026/27, and first year taxpayers get an extra 15 days, 30 in total, before a late payment penalty.
So year one is for getting the rhythm right, not for being punished while you learn it. The obligation is real, the records still have to be digital, but a stumble in the first couple of quarters is not going to cost money.
The approach we would take
Get software in place first and connect the business bank account to it. The whole time saving in MTD comes from not typing things in. People who find it miserable are almost always still doing manual entry.
Stop mixing personal and business spending through one account. It was survivable annually. It is genuinely painful quarterly.
Do a dry run before the first real deadline rather than learning the software on the day it matters.
If there is both a trade and property income, remember they are reported separately, so there are more updates than people expect.
The point of this example
MTD is not primarily a tax change, it is a bookkeeping change, and the people who struggle are the ones treating it as a filing problem to solve four times a year rather than a record keeping habit to fix once.
The genuine silver lining is that the shoebox January was never good for anyone. Knowing your numbers quarterly is how you find out you have a problem in July rather than the following January.
If you are in scope this year and not set up, get in touch. There is still time to do it calmly.
Affected by Making Tax Digital?
We check when it applies to you, set up the right software, and handle your quarterly updates, so the change is smooth rather than stressful.