MTD ITSA 2026: What Every Sole Trader Needs to Know Before April

Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is no longer on the horizon — it is here. From 6 April 2026, sole traders and landlords with annual income over £50,000 must submit quarterly digital updates directly to HMRC using compatible software. If that describes you, the time to act is now.

This guide explains what MTD ITSA means in practice, what changes from the old Self Assessment process, and how to make sure you are fully compliant from day one.

What Is MTD ITSA?

MTD ITSA is HMRC's programme to modernise income tax reporting. Under the old system, you filed a Self Assessment tax return once a year by 31 January. Under MTD ITSA, you will instead:

Submit quarterly updates to HMRC summarising your income and expenses (four times per year)
Submit an end-of-period statement at the close of the tax year
Complete a final declaration (replacing the traditional Self Assessment return) to confirm your overall tax position

The quarterly updates do not calculate your tax bill — they simply send HMRC a running picture of your business finances. The final declaration is where everything is reconciled.

Who Is Affected From April 2026?

The mandation applies in phases:

From 6 April 2026: Sole traders and landlords with total qualifying income over £50,000
From 6 April 2027: Those with income over £30,000
From 6 April 2028: Those with income over £20,000 (subject to HMRC confirmation)

Income thresholds are based on your gross trading or property income — not profit. If you have both a self-employed business and rental income, both streams count toward the threshold.

What Counts as a Quarterly Update?

Each quarterly update must include:

Income received during the quarter
Allowable expenses for the quarter, categorised by type

You do not need to submit invoices or receipts — just the totals. However, your underlying records must be kept digitally, in software that links directly to HMRC.

The four quarterly periods align with the tax year (6 April to 5 April), with updates due within one month of the period end.

The Digital Records Requirement

One of the most significant changes is the requirement to keep digital records. You can no longer maintain a spreadsheet that you update manually and then type figures into an HMRC portal. Every transaction must flow digitally from your records to your submission — with no manual re-keying allowed.

This means you need MTD-compatible accounting software. Pen and paper, basic spreadsheets, and most desktop accounting packages will not meet the requirement on their own.

How AccLedger Supports MTD ITSA

AccLedger is built specifically for MTD compliance. Through its direct HMRC integration [link to HMRC integration feature], AccLedger lets you:

Capture income and expenses as they happen, automatically categorised from your bank feed
Review and submit quarterly updates to HMRC in a few clicks, directly from your dashboard
Prepare your end-of-period statement and final declaration without switching platforms
Access your running profit and loss at any time so there are no surprises at year end

If you connect your bank account via AccLedger's open banking integration, transactions flow in automatically and are categorised using UK-specific chart of accounts categories — saving hours of manual data entry each quarter.

What Happens If You Miss a Quarterly Deadline?

HMRC is implementing a points-based penalty system for MTD ITSA. Each missed submission earns a penalty point. Once you accumulate enough points, a financial penalty is triggered. You can reduce your points total by submitting on time over a sustained period.

The key takeaway: late submissions add up. Building a habit of reviewing and submitting your quarterly update within a few days of the period ending is far safer than leaving it until the last moment.

Transitional Arrangements

HMRC has confirmed a soft landing period for the first year of mandation, meaning penalties may not be applied immediately for genuine teething issues. However, the legal obligation to submit still applies from 6 April 2026. Do not rely on the soft landing period as an excuse to delay getting set up.

Practical Steps to Take Right Now

Confirm whether you are in scope — check your 2024/25 trading income against the £50,000 threshold
Choose MTD-compatible software — AccLedger [link to sign up] meets all HMRC requirements
Connect your bank account — set up open banking so transactions are captured automatically
Speak to your accountant — if you use an accountant, they can be added to your AccLedger account and manage submissions on your behalf
Do a dry run — use the remaining weeks before April to get familiar with the submission process

Key Takeaways

MTD ITSA is mandatory from 6 April 2026 for those earning over £50,000
You must submit four quarterly updates per year plus an end-of-period statement and final declaration
Digital records are required — manual re-keying is not permitted
Missing submissions earns penalty points under the new points-based system
AccLedger handles MTD ITSA submissions directly from your bookkeeping records

This article is for informational purposes only. For advice tailored to your circumstances, please consult a qualified accountant.

Tags: MTD ITSA, Making Tax Digital, Self Assessment, Sole Trader, HMRC 2026