14 May 2026 · MTD ITSA · 7 min read

MTD ITSA Q1 deadline 7 August 2026: what you actually need

Phase 1 of Making Tax Digital for Income Tax Self Assessment went live on 6 April 2026 for sole traders earning over £50,000. The first quarterly update is due by 7 August. Here's a no-nonsense breakdown of what HMRC actually expects, what software you really need, and where companion tools (like Vailto) fit in.

If you're a UK sole trader or landlord with gross self-employment or property income above £50,000, the MTD ITSA clock has already started. The first quarterly update deadline is 7 August 2026, and a lot of well-meaning blog posts are conflating "MTD-compatible software" with "anything that lets you record receipts". They are not the same thing. Here's the actual landscape.

What HMRC actually requires

For each MTD-eligible business or property, you must:

  1. Keep digital records of income and expenses, in a format HMRC recognises (it doesn't have to be cloud — even a spreadsheet works, technically, if you also have bridging software).
  2. Submit four quarterly updates per year, summarising totals by HMRC category. These are not full tax returns — just running totals.
  3. Submit a Final Declaration by 31 January following the tax year, which replaces the old Self Assessment return.
  4. Use MTD-compatible software to make those submissions to HMRC's API. You can't email a PDF.

Two things follow from this. First: the submission step is what makes software "MTD-compatible" — it must talk to HMRC's API directly. Second: everything before the submission (capturing receipts, categorising expenses, tracking mileage, splitting personal vs business) is just bookkeeping, and you can do it however you want.

The MTD-compatible software list (full submission)

HMRC publishes a list of MTD-compatible software. As of May 2026 the main names you'll see are:

If your sole-trader income is above £50k and you don't already have one of these, get one. There's no workaround — you can't skip the submission step.

Where companion tools fit (and why they matter)

Here's the thing nobody talks about: most MTD-compatible software is great at submission but mediocre at capture. You're still expected to manually enter receipts, or use a clunky in-app camera, or forward emails to a generic inbox that misses half of them.

Companion tools sit upstream of your MTD software. They handle the messy real-world part — capturing every receipt the moment you spend, extracting structured data, tagging by HMRC category — and then export clean data (CSV, PDF, sometimes API) that your MTD software ingests for the quarterly submission.

This is where Vailto fits, and where it doesn't:

So the realistic stack for a £50k+ sole trader in May-August 2026 is something like:

Receipts and expenses captured throughout the quarter in Vailto (or any companion tool) → exported as CSV/PDF before quarter end → ingested into FreeAgent (or your MTD-compatible software) → quarterly update submitted to HMRC.

It's two tools, but the alternative — typing every receipt by hand into FreeAgent's mobile app — is what makes most people miss deadlines. Capture is the bottleneck, not submission.

Three things to do this week

  1. Confirm whether MTD applies to you. Phase 1 covers self-employment + property income above £50,000 gross. Phase 2 (£30k threshold) starts 6 April 2027. Phase 3 (£20k) currently scheduled for April 2028 but watch for HMRC slippage.
  2. Pick your MTD-compatible software if you don't already have one. Don't optimise — pick the cheapest one your accountant supports and move on. You can switch later.
  3. Set up your capture flow now. The Q1 update covers 6 April-5 July, so by August 7 you need three months of clean data. Going back through Gmail in late July looking for missed receipts is exactly what causes Q1 to fail.

Common mistakes (and how to avoid them)

Treating the quarterly update like a full tax return

It isn't. Quarterly updates are summary totals by HMRC category — not item-level breakdowns, no need for proof attached. The proof requirement is on you to retain (5 years generally, 6 for income tax records), but you don't submit it quarterly. Many first-time MTD filers panic-prepare detailed paperwork that isn't required for the submission itself.

Mixing personal and business expenses

If you've got one bank account doing both, MTD is going to expose every messy line. Open a dedicated business account before 6 July if you haven't already. It saves you 80% of the categorisation work.

Forgetting income from "small" sources

One-off consulting on the side, AirBnB during summer, eBay reselling. If gross from any one source crosses the threshold combined with your main self-employment income, MTD applies to all of it. HMRC's £1,000 trading allowance still exists but is per-person, not per-source.

Vailto for UK sole traders, in two lines

Vailto isn't MTD-compatible (yet — direct API submission is on our 2027 roadmap). What it does today, well, is the capture-and-categorise step that sits in front of any MTD software. See how it works — there's a free tier to test it on a few receipts before you decide.

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