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Making Tax Digital for Income Tax Self Assessment (MTD ITSA) becomes mandatory in April 2026 for self-employed individuals and landlords with annual business or property income above £30,000.¹ That leaves accountants fewer than seven busy months to prepare themselves, their systems and, more importantly, their clients.
Below is an accountant-friendly checklist you can share with nervous clients today. Follow it and you will not only reduce last-minute firefighting, you will position your firm as the calm voice of reason in a market that is already whipped into a frenzy.
1. Audit your client list against HMRC’s thresholds
Start by segmenting clients into:
- Phase-one clients – income > £50k (most affected and least time to adapt)
- Phase-two clients – income £30k–£50k (join MTD in 2027 if HMRC sticks to current plans)
- Below-threshold – continue filing SA100 for now but prepare for digital records anyway
Knowing who sits where lets you time your education and software roll-out without needless duplication.
2. Map existing data flows
Before buying more software, document how each client currently:
- Raises sales invoices
- Stores purchase receipts
- Tracks cash vs accruals
- Shares data with you
Look for paper or spreadsheet pinch points. MTD demands digital links, meaning every number must travel from source to HMRC without manual re-keying. A one-page flow map per client flags gaps fast.
3. Pick software that fits the client, not the other way round
No-code cloud ledgers suit most micro-businesses, but side hustles may be happier with mobile receipt apps that feed into bridging software. Build a short comparison grid that considers:
- Integration with bank feeds, e-commerce and payroll
- Pricing tiers (watch for “per-invoice” traps)
- Usability – will non-tech landlords actually open it?
- Scalability for phase-two clients whose income is climbing
4. Write a plain-English onboarding email sequence
Clients need to move from “Why are HMRC bullying me?” to “I’ve got this” in days, not months. Draft three short emails:
- Why MTD matters – focus on deadlines, penalties and benefits
- What you need from them – bank feed access, photo receipts, testing dates
- Next steps – training link, go-live date, ongoing support options
Keep each email to 150 words max. Use numbered lists, one request per paragraph and a single call to action. Clarity cuts phone panics by half. Email content marketing is relatively straightforward to outsource if you’re short of time.
5. Offer tiered support packages
Create bronze, silver and gold bundles so clients feel in control of costs:
| Package | What you do | What they do | Typical fee (monthly) |
|---|---|---|---|
| Bronze | Quarterly review + submission | Capture and categorise transactions | £40–60 |
| Silver | Bookkeeping + submission | Scan receipts | £90–120 |
| Gold | Real-time bookkeeping + tax forecasting | Approve entries | £150–250 |
Publish the table on your website now. Transparent pricing saves awkward sales calls and deters tyre-kickers.
6. Run a live demo (webinar style)
Screen-share the chosen software, show a one-click bank feed import and a sample quarterly update. Record it and send the replay link to any client who claims to be “too busy” for change. Seeing the workflow in action does more than ten email nudges.
7. Track and tweak
Create an MTD dashboard in Google Sheets (or your practice management tool) with columns for:
- Invite sent date
- Software licence activated
- Bank feed linked
- First test return filed
- Training complete
Review it weekly in team meetings. Momentum drops when you rely on memory.
How to turn the checklist into new-client magnetism
- Publish this very checklist on your blog and share snippets on LinkedIn with the hashtag #MTD2026.
- Host a free 30-minute Q&A for non-clients – position it as a public service, then follow up with a paid review offer.
- Partner with local landlords’ groups or freelancer hubs. Offer a joint webinar and split the lead list.
Every step above showcases your forward planning, so prospects see you as the antidote to last-minute chaos.
Quick FAQ
When exactly do quarterly updates start?
First submission covers 6 April–5 July 2026 and must reach HMRC by 5 August 2026.
What if a client’s income dips below £30k after they join MTD?
Under current guidance they remain in the regime unless HMRC grants an exemption.
Can spreadsheets still be used?
Yes, but only if they connect to HMRC via compliant bridging software with no manual copy-and-paste.
Are penalties higher than late SA returns?
Yes. There is a points-based late-submission system plus separate late-payment interest, so small, repeated slip-ups get expensive fast.
About the author
Michelle Eshkeri ACMA is a London-based financial-services copywriter and AI trainer who helps accountants translate complex regulation into plain-English content that wins trust – and clients. When she is not writing conversion-ready copy, she is teaching small-business owners how to wield generative AI without the jargon.
¹ HMRC policy paper Making Tax Digital for Income Tax Self Assessment, updated 21 March 2025.