Making Tax Digital
for builders
Builders and construction trades working as sole traders come into Making Tax Digital for Income Tax on turnover — over £50,000 from April 2026, £30,000 from April 2027, £20,000 from April 2028. Construction turnover includes materials and anything recharged, so a builder reaches a band far below the point their profit would.
Self-employed builders, groundworkers, roofers, bricklayers and general construction trades, including CIS subcontractors.
When it starts for you
HMRC phases this in by qualifying income — your self-employment and property turnover added together, before expenses.
| Qualifying income | Mandatory from | |
|---|---|---|
| over £50,000 | 6 April 2026 | In force now. |
| over £30,000 | 6 April 2027 | The next band. |
| over £20,000 | 6 April 2028 | The widest band. |
It is turnover, not profit, and it is added across all your sole trades and property together. Someone with £18,000 of trade income and £14,000 of rent has £32,000 of qualifying income, not two figures under the threshold.
What is different for you
The parts that catch builders out
CIS is deducted from your income, not netted off it
A contractor deducting 20% before paying you has withheld tax, not reduced your turnover. Your records report the gross, and the deductions are set against the tax due at the end of the year.
Paying subcontractors is its own record
If you engage subcontractors, what you pay them is an expense in its own HMRC category, and the CIS side of that has obligations separate from MTD. The two record-keeping duties run alongside each other.
Materials swamp the threshold test
On jobs where you supply as well as fit, the money through the business is a multiple of what you keep. This is the trade where the gap between turnover and profit catches the most people.
What actually changes
Digital records, kept as you go
Your income and expenses have to be recorded digitally rather than added up from a shoebox once a year. That is the part that changes day to day, and it is the part Revenue is built for.
Quarterly updates
Four updates a year per business, sent to HMRC from compatible software. They are running totals of income and expenses, not four mini tax returns, and no tax is due on them.
A final declaration
After the fourth quarter you finalise the year — adjustments, reliefs, anything outside the business — and declare it. This replaces the Self Assessment return you file today.
One set of books per business
HMRC treats a sole trade and a property business as separate businesses with separate obligations, even for the same person. Two income sources means two sets of quarterly updates.
Being straight with you
To be straight about where Revenue is today: it keeps your books on a real double-entry ledger and prepares the figures behind an SA return, but it does not yet send quarterly MTD for Income Tax updates to HMRC — that is in development, and our HMRC production approval is still in progress. If you are mandated now, keep your records in Revenue and file through an HMRC-recognised route until we can tell you otherwise. RepBud is designed to assist, not replace, your professional judgement.
Questions builders ask
When do builders have to start using Making Tax Digital?
It depends on turnover, not trade. If your qualifying income — self-employment and property added together, before expenses — was over £50,000 you are already in, from 6 April 2026. Over £30,000 brings you in from 6 April 2027, and over £20,000 from 6 April 2028. HMRC works this out from the return you have already filed, and writes to you.
Does this mean four tax bills a year?
No. A quarterly update is a running total of your income and expenses, sent from your software. There is no tax calculation attached to it and nothing to pay. Your tax stays due on the same dates it is now — the payment deadlines have not changed.
What if I am under the threshold?
Then you carry on filing Self Assessment as you do now, and nothing changes for you yet. It is worth knowing where you sit relative to the £20,000 band coming in April 2028, because qualifying income is turnover rather than profit and it catches more people than expected.
Can my accountant do it for me?
Yes. An agent can send quarterly updates on your behalf, and most people who use an accountant today will carry on the same way. What changes is that the records behind those updates have to be kept digitally through the year rather than assembled at the end of it — which is the half you can get ready now.
Also covered
Thresholds and dates are HMRC’s, checked August 2026. This is general information about the regime, not tax advice for your circumstances.