Making Tax Digital 2026: What UK Businesses Must Know

On 6 April 2026, the way millions of UK taxpayers report their income to HMRC changes permanently. Making Tax Digital for Income Tax Self Assessment — MTD for ITSA — requires self-employed individuals and landlords earning above £50,000 to keep digital records and file quarterly updates using compatible software. No more shoeboxes of receipts. No more once-a-year scramble to file a Self Assessment return based on vaguely remembered figures from eleven months ago.

This isn't a proposal or a consultation. It's happening. The legislation is in place, the software providers are ready, and HMRC has spent the better part of a decade building the infrastructure. If you're self-employed, a sole trader, a landlord, or a partner in a business, and your qualifying income exceeds £50,000, you have until April 2026 to be compliant. If your income exceeds £30,000, you have until April 2027.

I've spent 24 years in financial control and compliance at Citigroup and ABN AMRO, and now work as a fractional CFO and controller for businesses on both sides of the Atlantic. I've watched regulatory change like this roll out dozens of times, and the pattern is always the same. The businesses that prepare early handle it smoothly; the ones that wait until the last quarter scramble, overpay, and make avoidable mistakes. This guide is designed to ensure you're in the first camp.

What Is Making Tax Digital?

Making Tax Digital (MTD) is HMRC's long-term programme to transform the UK tax system into a fully digital service. The core premise is straightforward: businesses and individuals should keep their tax records digitally and submit information to HMRC using compatible software, rather than relying on manual paper-based processes or annual returns cobbled together from incomplete records. With small businesses accounting for 99.9% of the UK business population, the scope of this change is vast.

HMRC's stated objectives for MTD are threefold. First, to reduce the tax gap — the difference between what HMRC is owed and what it actually collects — which was estimated at £35.8 billion in 2021-22 and has continued to grow. Second, to make it easier for taxpayers to get their tax right the first time, by providing closer-to-real-time visibility of their tax position. Third, to modernise a tax administration system that, in many respects, still operates on processes designed in the 1990s.

The programme has been rolled out in phases. MTD for VAT came first, becoming mandatory for all VAT-registered businesses in April 2022. MTD for Income Tax Self Assessment is next, with a phased introduction starting April 2026. MTD for Corporation Tax is expected to follow, though HMRC has not yet confirmed a mandatory start date.

At its core, MTD requires three things from affected taxpayers: digital record-keeping (maintaining business records in a digital format using compatible software), quarterly updates (submitting summarised income and expense data to HMRC every quarter), and a final declaration (an end-of-year submission that replaces the traditional Self Assessment tax return). The quarterly updates are not tax returns. They're summary submissions that give both you and HMRC a running picture of your tax position throughout the year, rather than one annual snapshot.

MTD Timeline: What's Already Live and What's Coming

Making Tax Digital has been rolling out in phases since 2019. Here's where we are now and what's coming next.

MTD for VAT — Already Mandatory

If you're VAT-registered, you should already be compliant with MTD for VAT. Since April 2022, every VAT-registered business, regardless of turnover, must keep digital VAT records and submit VAT returns through compatible software. With over 2.7 million VAT-registered businesses in the UK, this was a major compliance shift. According to HMRC, over 1.8 million businesses have already signed up for Making Tax Digital for VAT. If you're still filing VAT returns manually through the HMRC portal, you're technically already non-compliant and should rectify this immediately.

MTD for ITSA — April 2026 and April 2027

This is the big one. From 6 April 2026, self-employed individuals and landlords with qualifying income exceeding £50,000 must comply with MTD for ITSA. "Qualifying income" means gross income from self-employment and/or property before any deductions or allowances are applied. If your self-employment income is £35,000 and your rental income is £20,000, your combined qualifying income is £55,000, so you're in scope from April 2026.

From 6 April 2027, the threshold drops to £30,000. HMRC has indicated it may extend MTD for ITSA to those with income below £30,000 in future, but no date has been set for this.

Who Must Comply with MTD for ITSA?

Understanding whether you fall within the scope of MTD for ITSA is the critical first question. The rules are based on your qualifying income: the gross income from all self-employment and property sources combined, before expenses and allowances.

What Are Quarterly Submissions?

Under MTD for ITSA, you must send HMRC a quarterly update summarising your business income and expenses for that period. These are not full tax returns. They're simplified summary submissions sent directly from your compatible software to HMRC via their Application Programming Interface (API).

The quarterly periods follow the tax year, and each update is due by the last day of the month following the quarter end. Here are the deadlines:

Each quarterly update includes a summary of your total income and total allowable expenses for that quarter. Your software will categorise expenses into the standard HMRC categories: cost of goods sold, premises costs, travel costs, staff costs, and so on. You don't need to send individual invoices or receipts with each update, but you must retain the underlying digital records in case HMRC requests them.

The final declaration is submitted after the end of the tax year and replaces the traditional Self Assessment tax return. This is where you make any year-end adjustments, claim allowances and reliefs, declare any additional income not covered by quarterly updates (such as interest, dividends, or capital gains), and confirm that the information is complete and correct. The final declaration deadline is 31 January following the end of the tax year, the same deadline that currently applies to Self Assessment.

Compatible Software Requirements

HMRC requires that you use software that is "functionally compatible" with Making Tax Digital. This means the software must be able to:

1. Record and preserve digital records — maintain your income and expense data in digital form, with the required level of detail.
2. Provide HMRC with information and returns — generate and submit quarterly updates and the final declaration directly to HMRC via their API.
3. Receive information from HMRC — accept and display your tax calculation and any other communications sent back through the API.

Critically, spreadsheets alone do not meet the requirements. If you keep your records in Excel or Google Sheets, you must use HMRC-recognised bridging software to submit your quarterly updates. The link between your spreadsheet and the bridging software must be fully digital; no manual re-keying of data is permitted. Every figure that flows from your spreadsheet to your HMRC submission must travel through a digital link without human intervention.

The major cloud accounting platforms — Xero, QuickBooks Online, FreeAgent, and Sage — are all MTD-compatible and can handle both record-keeping and direct submission to HMRC. For most businesses, using one of these platforms end-to-end is the simplest and most reliable approach.

HMRC maintains a searchable list of compatible software on GOV.UK, and as of early 2026 the list includes over 20 providers. When choosing software, consider not just MTD compatibility but also integration with your existing workflows: bank feeds, invoicing, payroll, and your accountant's preferred platform.

Digital Record-Keeping Rules

MTD doesn't just change how you submit information — it changes how you must store it. Under the digital record-keeping rules, you must maintain the following records in digital form for each business:

• Business name, address, and nature of business
• Income received — the date, amount, and category of every item of business income
• Expenses incurred — the date, amount, and category of every allowable business expense
• Details of each individual transaction — not just summary totals, but the underlying transaction-level data

For property businesses, additional records are required for each property, including the address, the type of letting (residential, furnished holiday let, etc.), the rental income received, and the expenses attributable to that property.

The records must be maintained within your compatible software or in a digitally linked system. "Digitally linked" means data flows between software programmes, applications, or products electronically without manual intervention. If you maintain a spreadsheet that feeds into your accounting software via an automated import, that's digitally linked. If you type figures from a spreadsheet into your accounting software, that's not.

Penalties for Non-Compliance

HMRC has introduced a new points-based penalty regime for MTD, replacing the previous automatic penalty system for Self Assessment. The new regime applies to late submissions and late payments separately.

Late Submission Penalties

Each time you submit a quarterly update or final declaration late, you receive one penalty point. Once your points reach the threshold for your submission frequency, you receive a £200 penalty, with a further £200 penalty for each subsequent late submission while you remain at the threshold.

Points can be reset to zero if you meet a period of compliance: submitting all returns on time for a consecutive period. For quarterly filers, this requires four consecutive on-time submissions, giving taxpayers a mechanism to "clear their record" without the points accumulating indefinitely.

Late Payment Penalties

Late payment penalties are calculated as a percentage of the outstanding tax:

In addition to penalties, HMRC charges late payment interest at the Bank of England base rate plus 2.5% on any tax paid late. As of early 2026, with the base rate at 4.5%, that's an effective interest rate of 7% on overdue tax, a significant cost if your tax bill is substantial.

MTD for Corporation Tax

HMRC has confirmed that Making Tax Digital will eventually extend to Corporation Tax, bringing limited companies into the digital reporting framework. With over 5.5 million companies registered at Companies House, the eventual impact will be significant. However, as of early 2026, no mandatory start date has been set. HMRC has stated that MTD for Corporation Tax will not be mandated before 2026/2027 at the earliest, and most industry observers expect a pilot programme before any mandatory roll-out.

What we know so far:

• Limited companies will need to keep digital records and file Corporation Tax returns using compatible software
• The quarterly reporting requirement may apply, though the precise obligations are still under consultation
• Companies already using cloud accounting software (Xero, QuickBooks, Sage) are likely to be well-positioned, as these platforms will add CT submission functionality
• HMRC is expected to run an extended pilot before mandating compliance, similar to the approach taken with MTD for VAT

If you operate through a limited company, MTD for Corporation Tax is not something you need to act on today, but it is something to plan for. Ensuring your company's records are maintained digitally in compatible software is a sensible step regardless of MTD, as it improves financial visibility, simplifies year-end accounts preparation, and positions you for a smooth transition when the mandate arrives.

How to Prepare Your Business for MTD 2026

Whether the April 2026 deadline affects you directly or you're preparing for the April 2027 threshold, the steps are the same. Here's a practical checklist for getting your business MTD-ready.

Here's the condensed checklist:

• Calculate your qualifying income (gross self-employment + property income)
• Confirm whether you're in scope for April 2026 or April 2027
• Select HMRC-compatible accounting software
• Migrate all current-year financial records to the software
• Connect bank feeds and set up automated transaction imports
• Map your income and expense categories to HMRC's required classifications
• Register for MTD for ITSA via Government Gateway
• Connect your software to HMRC's API
• Run a practice quarterly submission
• Set up recurring calendar reminders for all quarterly deadlines
• Brief your accountant or tax adviser on your MTD readiness status
• Establish a weekly or monthly record-keeping routine

How a Fractional Controller Handles MTD Compliance

For many self-employed professionals and landlords, the prospect of quarterly digital submissions on top of running a business is daunting. This is precisely the kind of operational compliance burden that a fractional controller is designed to absorb. Here's what that looks like in practice.

A fractional controller — someone who provides part-time, senior-level financial management on a retained basis — takes ownership of your entire MTD compliance workflow. That means:

• Software setup and configuration — selecting, implementing, and configuring your MTD-compatible software, including bank feed connections, chart of accounts mapping, and HMRC API registration.
• Ongoing digital record-keeping — ensuring that every transaction is recorded, categorised, and reconciled in real time, so your records are always submission-ready.
• Quarterly submissions — preparing, reviewing, and submitting each quarterly update to HMRC on time, every quarter. No missed deadlines. No penalty points.
• Year-end final declaration — preparing the final declaration with all adjustments, allowances, and reliefs correctly applied, and submitting it ahead of the 31 January deadline.
• HMRC correspondence and queries — handling any HMRC enquiries, information requests, or discrepancies that arise from your submissions.
• Proactive tax position monitoring — because your records are maintained quarterly, a fractional controller can give you a running estimate of your tax liability throughout the year, eliminating the nasty surprise of a large tax bill in January that you hadn't budgeted for.

The key difference between a fractional controller and a traditional accountant for MTD purposes is frequency and proximity. Your accountant typically sees your records once a year, at year-end. A fractional controller is working with your records every week or every month. That ongoing involvement means your data is always current, your submissions are always on time, and your tax position is always visible — not something you discover eleven months after the fact.

Why BlackpeakCFO for MTD Compliance

BlackpeakCFO is led by Stuart Wilson, ACMA CGMA — a Chartered Institute of Management Accountants member with 24 years of financial control experience at Citigroup and ABN AMRO, now providing fractional CFO and controller services to businesses in both the UK and the United States.

That dual US-UK experience matters for MTD. Many UK-based professionals and landlords have cross-border financial complexity — US tax obligations, multi-currency income, or business interests in both jurisdictions. A controller who understands both HMRC's requirements and IRS obligations can ensure that your MTD compliance fits within a coherent international tax strategy, rather than existing in isolation.

Here's what BlackpeakCFO brings to MTD compliance specifically:

• CIMA qualification (ACMA CGMA) — the global management accounting credential, demonstrating competence in financial reporting, regulatory compliance, and strategic financial management.
• 24 years institutional experience — regulatory compliance at global banks means understanding complex regulatory frameworks, audit trails, and the cost of getting it wrong.
• UK and US tax system knowledge — practical experience with HMRC, Companies House, IRS, and state-level tax compliance across both jurisdictions.
• Technology-first approach — proficiency with Xero, QuickBooks, FreeAgent, and the integration tools that make MTD compliance seamless rather than burdensome.
• Fractional model — senior-level financial expertise at a fraction of the cost of a full-time hire, with the flexibility to scale up or down as your needs change.

Our UK service tiers are structured to provide the right level of support for businesses at different stages:

Compare that to the cost of a full-time management accountant in the UK — £45,000 to £65,000 in salary alone, plus employer's NIC, pension contributions, and benefits. That's £55,000 to £85,000 all-in. The Foundation tier at £1,995 per month (£23,940 annually) delivers MTD compliance, monthly bookkeeping, and management accounts at less than half the cost of even the most junior hire — with significantly more experience behind it.

Frequently Asked Questions

What is Making Tax Digital for Income Tax Self Assessment?

Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) is HMRC's programme requiring self-employed individuals and landlords to keep digital records and submit quarterly updates to HMRC using compatible software. From April 2026, those with qualifying income over £50,000 must comply. From April 2027, the threshold drops to £30,000. The programme replaces the traditional annual Self Assessment tax return with a combination of quarterly updates and an end-of-year final declaration.

When does Making Tax Digital for ITSA start?

MTD for ITSA starts on 6 April 2026 for self-employed individuals and landlords with qualifying income exceeding £50,000. From 6 April 2027, the threshold reduces to £30,000. MTD for VAT has been mandatory since April 2022 for all VAT-registered businesses. HMRC has not yet confirmed a start date for MTD for Corporation Tax, but it is expected no earlier than 2026/2027.

What software do I need for Making Tax Digital?

You need HMRC-recognised compatible software that can maintain digital records, generate quarterly updates, and submit them directly to HMRC via their API. Popular options include Xero, QuickBooks Online, FreeAgent, and Sage. HMRC maintains a searchable list of compatible software on GOV.UK. Spreadsheets alone are not sufficient — they must be linked to compatible bridging software with a fully automated digital link (no manual re-keying).

What are the penalties for not complying with MTD?

HMRC uses a points-based penalty system. You receive one point for each late quarterly submission. Once you reach 4 points (for quarterly filers), you receive a £200 penalty, and a further £200 for each subsequent late submission. For late payments, there's a 15-day grace period, then 2% of tax outstanding at day 15, a further 2% at day 30, and 4% per annum from day 31 onwards. Late payment interest also accrues at the Bank of England base rate plus 2.5%.

Do I need to submit quarterly returns under MTD for ITSA?

Yes. You must submit four quarterly updates per year, covering the periods 6 April to 5 July, 6 July to 5 October, 6 October to 5 January, and 6 January to 5 April. Each update is due by the 5th of the second month after the quarter ends. You must also submit a final declaration by 31 January following the end of the tax year, replacing the traditional Self Assessment return.

Does MTD for ITSA affect limited companies?

No. MTD for ITSA applies to self-employed individuals and landlords, not limited companies. HMRC has announced that a separate MTD for Corporation Tax programme will be introduced in future, but no mandatory start date has been set. However, if you are a company director with additional self-employment or rental income above the qualifying threshold, that personal income does fall within MTD for ITSA.

Can I use spreadsheets for Making Tax Digital?

Spreadsheets alone do not meet MTD requirements. You can use spreadsheets for record-keeping only if they are connected to HMRC-recognised bridging software via a fully automated digital link — meaning data flows electronically without any manual re-keying. In practice, most businesses find it simpler and more reliable to use a full cloud accounting platform (Xero, FreeAgent, QuickBooks) rather than maintaining a spreadsheet-plus-bridging-software arrangement.