MTD for Income Tax Starts in Weeks: Is Your ERP Ready?

94% of UK Businesses Are Not Ready

Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) goes live on 6 April 2026. That’s weeks away. According to recent surveys, 94% of affected businesses still haven’t set up MTD-compatible software. If you’re one of them, this guide is for you.

MTD for ITSA isn’t a minor filing change. It fundamentally alters how self-employed people and landlords with qualifying income above £50,000 report to HMRC. Instead of one annual Self Assessment return, you must submit quarterly digital updates plus a final declaration — all through MTD-recognised software.

This article isn’t about the theory behind MTD. We’ve covered that in our complete MTD guide. This is about practical readiness: what your software must actually do, what breaks if it doesn’t, and how to get compliant in the time you have left.

The Timeline You’re Working With

HMRC has confirmed a soft landing for the first year — no penalties for late quarterly updates. But this doesn’t apply to late payment of tax, and it certainly doesn’t mean you can delay setting up your systems. The soft landing is for occasional filing delays, not for businesses that haven’t started preparing.

What MTD-Compatible Actually Means for Your ERP

HMRC maintains a list of recognised software that can connect to their systems. Being on that list requires specific technical capabilities. Here’s what your ERP or accounting software must do:

1. Digital Record-Keeping

Your software must be the primary record of all business income and expenses. This means:

• Every sale, purchase, and expense is entered into the software when it occurs — not batched at month-end
• Records include the amount, date, category, and VAT treatment (if VAT-registered)
• Records cannot be easily altered without an audit trail
• Paper ledgers supplemented by manual data entry into HMRC’s portal is not compliant

If you currently track income in a spreadsheet and type totals into GOV.UK, that workflow breaks on 6 April.

2. HMRC API Integration

Your software must connect directly to HMRC’s Making Tax Digital API to:

• Retrieve obligations: Fetch your filing periods and deadlines from HMRC
• Submit quarterly updates: Send summarised income and expense data for each quarter
• Submit End of Period Statements (EOPS): Confirm that the data for the full year is complete and correct
• Submit Final Declaration: Replace the annual Self Assessment tax return
• Receive acknowledgements: Get confirmation that submissions were accepted

This is a two-way integration. Your ERP doesn’t just push data to HMRC — it pulls obligations and confirmations back. Software that can generate reports but can’t talk to HMRC’s API is not MTD-compatible.

3. Digital Links

If your business uses more than one system (point-of-sale, bank feeds, payroll, inventory), the data flowing between them must be digitally linked. HMRC’s guidance in VAT Notice 700/22 is explicit: manually re-keying figures between systems breaks the digital link.

This is where many ERP systems fall short. An ERP that requires you to export a CSV from your bank, manually clean it up, and import it again does not maintain a digital link. The connection must be automated and auditable.

4. Multi-Tax Support

If you’re both self-employed and a landlord — or have multiple income sources — your software must handle multiple businesses within a single MTD submission. HMRC requires that all qualifying income is reported through the same digital channel.

Your ERP should be able to:

• Track income and expenses separately per business or property
• Consolidate them into a single quarterly update
• Maintain separate records while filing a unified return

Where Most ERPs Fail

The gap between “has MTD on the feature list” and “actually makes you compliant” is wider than vendors admit. Here are the most common failure points:

Bank Reconciliation Without Digital Links

Many accounting tools let you import bank transactions via CSV upload. Technically, this maintains a digital link (file-based transfer). But if you’re manually editing the CSV before import — removing personal transactions, fixing categories, adjusting dates — you’ve broken the link. Your ERP should connect to your bank directly via Open Banking and categorise transactions automatically.

Manual Journal Entries for Tax Adjustments

If your accountant makes year-end adjustments by manually keying journal entries that don’t originate from source transactions, those entries may not meet HMRC’s digital record-keeping standard. Your ERP should support adjustment entries that link back to the original transactions they’re correcting.

Quarterly Updates Require Real-Time Books

MTD for ITSA expects you to submit quarterly updates that accurately reflect your income and expenses for that period. If your books are only “done” at year-end — which is how many small businesses operate — you’ll either submit inaccurate quarterly updates or scramble to catch up four times a year instead of once.

The fix isn’t to file faster. The fix is to maintain your books in real time. That means:

• Invoices created when work is done, not when you remember
• Expenses captured when they occur, not from a pile of receipts in March
• Bank transactions reconciled weekly, not annually

An AI-powered ERP can make this realistic by automating categorisation, matching payments to invoices, and flagging things you’ve missed.

No Support for the New Penalty Regime

HMRC’s points-based penalty system means that late quarterly submissions accumulate points. At 4 points (for quarterly filers), every subsequent late submission triggers a £200 penalty. Your ERP should:

• Display upcoming filing deadlines prominently
• Send alerts before each quarterly deadline
• Track your penalty points status
• Make submission a one-click action, not a multi-step process

The ERP Readiness Checklist

Use this to evaluate whether your current software (or any replacement you’re considering) is genuinely ready for MTD:

Non-Negotiable Requirements

• On HMRC’s recognised software list — Check at GOV.UK. If it’s not listed, it’s not compliant
• API connection to HMRC — Can submit quarterly updates, EOPS, and Final Declaration directly
• Digital record-keeping — All transactions recorded digitally with audit trail
• Digital links — Automated data flow between connected systems (bank, payroll, POS)
• FRS 102 / FRS 105 chart of accounts — Aligned to UK accounting standards
• VAT calculation — Correct rates (20%, 5%, 0%) applied automatically per transaction
• Quarterly reporting — Can generate and submit quarterly summaries without manual aggregation

Strongly Recommended

• Open Banking integration — Direct bank feeds, not CSV imports
• Automated transaction categorisation — AI or rule-based, reducing manual data entry
• Multi-business support — Separate tracking for multiple income sources
• Real-time P&L and tax estimates — Know your tax position throughout the year, not just at year-end
• Deadline alerts and filing calendar — Proactive notifications before each quarterly deadline
• Accountant access — Your accountant can view and verify your records digitally
• Mobile access — Capture expenses and invoices on the go

Red Flags

• Software that requires you to manually export data and re-enter it elsewhere
• No direct HMRC API connection (relies on a “bridging” tool that you manage separately)
• Vendor says MTD support is “coming soon” but has no declared date
• Cannot handle quarterly reporting without significant manual work
• No immutable audit trail (records can be edited without trace)

Why an AI-Powered ERP Changes the Equation

The core challenge of MTD isn’t the filing itself — it’s maintaining accurate, real-time books throughout the year. That’s where traditional accounting software falls short for small businesses. It gives you the tools but relies on you to use them consistently.

An AI-powered ERP like Odiverse approaches this differently:

Continuous bookkeeping, not periodic catchup: Odiverse’s AI assistant Odi processes invoices, categorises transactions, and reconciles bank feeds as they happen. Your books are always current because the AI handles the routine work that most business owners defer.

UK tax rules built in: Odi understands VAT rates, NIC calculations, and HMRC filing deadlines. Ask when your next quarterly update is due or what VAT rate applies to a specific supply, and you get a straight answer — not a link to a help article.

FRS 102 by default: UK businesses get a 207-account chart of accounts aligned to FRS 102 out of the box. No manual setup, no importing templates, no hoping the categories match what Companies House expects.

Immutable records by design: Odiverse uses event sourcing — every transaction is an immutable event. You cannot accidentally delete or alter a record. This is exactly what HMRC means by “digital records that cannot be easily altered.”

From 12 days to real-time: Traditional month-end close takes UK SMEs an average of 12 working days. With AI handling categorisation, matching, and reconciliation, your books close themselves. Quarterly updates become a one-click submission, not a quarterly crisis.

What To Do This Week

If you’re affected by MTD for ITSA (self-employed or landlord with income above £50,000), here’s your action plan:

If you already have MTD-compatible software

1. Verify it’s on HMRC’s list — Don’t take the vendor’s word for it
2. Test the HMRC connection — Submit a test update to HMRC’s sandbox if available
3. Set up Open Banking — Connect your business bank account for automated feeds
4. Configure quarterly periods — Make sure your software knows your accounting periods
5. Brief your accountant — Ensure they can access your records digitally

If you don’t have MTD-compatible software yet

1. Don’t panic, but act now — The soft landing gives you breathing room on penalties, not on setup
2. Choose software that solves the real problem — MTD compliance is table stakes. Pick software that keeps your books current year-round, not just at filing time
3. Migrate your existing records — Import your current year’s transactions so your first quarterly update is complete
4. Start using it for everything — Every invoice, every expense, every bank transaction goes through the new system from day one
5. File your first quarterly update by 6 July 2026 — Covering 6 April to 5 July

If you’re between £30,000 and £50,000

You have until April 2027, but starting now means:

• You’ll have a full year of practice before you’re mandated
• Your books will be in better shape for your current Self Assessment
• You avoid the rush when 2027 arrives and everyone in your income bracket scrambles to comply

The Bottom Line

MTD for Income Tax is not a future problem. It starts on 6 April 2026. The businesses that will handle it smoothly are the ones that have already set up the right software and built the habit of real-time record-keeping.

The 94% who aren’t ready yet have a choice: scramble now with a tool that just ticks the compliance box, or invest in a system that makes compliance a natural byproduct of running the business well.

See how Odiverse handles MTD compliance — or join the waitlist to get started before the April deadline.

If you’re still deciding, read our complete Making Tax Digital guide for the full regulatory background, or compare how AI ERPs differ from traditional accounting software.