Making Tax Digital for Income Tax is no longer on the horizon - the first wave went live in April 2026. For accountancy practices, the interesting thing about MTD is where the difficulty actually sits. The tax software is the easy part; the vendors have that covered. The hard part is everything upstream of it: getting each client's invoices, receipts and statements in, digitised, organised and ready, not once a year but every quarter. That is a document problem, and it is the one most practices have not fully solved.
What MTD for Income Tax actually requires
Strip away the jargon and there are three obligations for a client in scope. Keep digital records of income and expenses. Send HMRC a summary update every quarter through MTD-compatible software. Finalise the year digitally after it ends. The annual Self Assessment scramble becomes a quarterly rhythm, and the records behind it have to be genuinely digital - a shoebox reconciled in January will not cut it.
The timeline, and why it keeps coming
MTD for Income Tax is phased in by income level, so it is not a single date you prepare for once. Each April pulls a new, larger band of clients into scope.
| From | Who it applies to |
|---|---|
| 6 April 2026 | Sole traders and landlords with gross income over £50,000. This wave is already live. |
| 6 April 2027 | The threshold drops to gross income over £30,000 - a much larger group of clients. |
| 6 April 2028 | The threshold drops again to gross income over £20,000, bringing in many smaller sole traders and landlords. |
| Every quarter | For each client in scope, a digital update to HMRC - roughly a month after each quarter ends - plus a year-end finalisation. |
Gross income here means turnover before expenses, combined across self-employment and property. Because the thresholds keep falling, MTD is not a project you finish - it is a new operating model your practice grows into over three years.
Why this is a documents problem, not just a software one
Every figure in a quarterly update is built on a document: an invoice, a receipt, a bank statement, a mileage log. MTD software needs those figures digitally and on time. What it quietly assumes is that the source documents behind them already exist somewhere organised and retrievable. For most practices, they do not - they arrive late, in a dozen formats, over email and WhatsApp and paper, and someone has to wrangle them into order before any software can do its job.
Do that reconstruction once a year and it is painful. Do it four times a year, across every client above a falling threshold, and it becomes the thing that breaks. The bottleneck in MTD is not filing. It is getting the records in.
Capture continuously, not quarterly
The practices that handle MTD calmly all do the same thing: they stop treating document collection as a quarterly event and make it continuous. Clients submit records close to when they happen - a photographed receipt, a forwarded invoice, an uploaded statement - and those land straight into an organised, searchable store rather than an inbox. When the quarterly update comes round, the quarter is already assembled. It becomes a review, not a reconstruction.
That only works if capture is effortless for the client and automatic for you. If it takes admin effort to file each document, it will not happen, and you are back to the January carrier bag.
Where DocFlow fits
DocFlow is not your MTD filing software and does not replace it. It handles the document and records layer underneath - the part that decides whether each quarter is smooth or frantic. As client documents arrive, in whatever form, Aida classifies and indexes them automatically - this is an invoice, this a bank statement, this a receipt - and extracts the key data, so you are working with organised information rather than a pile of attachments. Workflow automation routes documents to the right client file and the right person, retention is applied automatically, and every record carries a tamper-evident audit trail. When a quarterly update is due, the source records are already in order; if HMRC ever queries a figure, you produce the document behind it in seconds.
If you are still getting historical client records off paper, our guide to document digitisation is a sensible first read, and our how long to keep business records guide covers the retention periods that sit alongside MTD. MTD is also part of a wider digital-tax direction of travel - the same one behind the coming UK e-invoicing mandate - so getting your document handling right now pays off well beyond Income Tax.
What to do now
- Segment your client base by threshold. Know who is already in scope, who joins in April 2027, and who follows in 2028. That is your rollout plan.
- Fix document collection first. Give clients one simple, consistent way to submit records as they go, that lands somewhere organised automatically. This is the highest-leverage change you can make.
- Digitise the back catalogue. Get existing paper records into a searchable store so no client starts MTD with a filing gap.
- Make retrieval instant. When HMRC or a client asks for the document behind a figure, you should find it in seconds, with a clear audit trail.
MTD rewards the practices that treat client records as a live, organised, always-ready asset rather than something reassembled under deadline. Get the document side right and every quarterly update becomes routine. Our document management for accountancy page shows how it fits a practice end to end.