What Is Making Tax Digital? MTD Explained in Plain English

If you've searched for what is Making Tax Digital, you're probably a sole trader, landlord, or small business owner who has just received a letter from HMRC, or heard the term "MTD" from an accountant and wants a straight answer before doing anything else. This guide explains, in plain English, what Making Tax Digital actually is, how MTD for VAT differs from MTD for Income Tax (also called MTD ITSA), who has to comply and when, and what "compatible software" really means in practice.

The short version: Making Tax Digital is HMRC's programme to move business record-keeping and tax reporting online, using approved software instead of paper records or spreadsheets typed into HMRC's website by hand. It does not mean HMRC sees your bank account or your invoices in real time - it means your digital records feed directly into your VAT return or Self Assessment submission, reducing manual re-entry and, in HMRC's view, reducing errors.

What Is Making Tax Digital, Exactly?

Making Tax Digital (MTD) is a long-running HMRC initiative that requires certain individuals and businesses to keep digital records and submit tax information using MTD-compatible software, rather than filing manually through HMRC's online portal or on paper. It rolled out first for VAT and is now extending to Income Tax Self Assessment for sole traders and landlords above set income thresholds.

MTD is a change in how you record and submit information, not a change in what tax you owe. Your VAT liability, your Income Tax bill, and your allowable expenses are calculated the same way they always were - MTD simply requires the records behind those figures to be kept digitally, and the returns to be sent using software that can talk to HMRC's systems directly.

MTD for VAT vs MTD for Income Tax (ITSA)

There are two distinct strands of Making Tax Digital, and mixing them up is the most common source of confusion.

• MTD for VAT applies to VAT-registered businesses. If you're VAT-registered, digital record-keeping and digital VAT return submission are already a legal requirement - this part of MTD has been in force for VAT-registered businesses for several years. See our dedicated guide on MTD VAT software for the detail on submitting your VAT return.
• MTD for Income Tax, usually shortened to MTD ITSA (Income Tax Self Assessment), is the newer, wider-reaching strand. It applies to sole traders and landlords whose qualifying income is above HMRC's set thresholds, regardless of whether they're VAT-registered. Instead of one annual Self Assessment return, affected taxpayers keep digital records and send quarterly updates to HMRC, followed by a year-end finalisation.

This guide anchors both strands, but if you're specifically trying to work out whether MTD ITSA applies to you, our guide to Making Tax Digital for sole traders walks through it step by step.

A Short History: Why Did MTD Happen?

Making Tax Digital wasn't introduced overnight. HMRC's stated aim was to close the "tax gap" caused by avoidable errors in manual record-keeping - transposition mistakes, lost receipts, arithmetic slips on paper ledgers - by moving businesses onto digital records that carry figures through automatically rather than requiring them to be copied out by hand at year-end. MTD for VAT came first, becoming mandatory for VAT-registered businesses. MTD for Income Tax followed as the next, larger phase, extending the same digital-first approach to sole traders and landlords reporting through Self Assessment.

Understanding this context matters because it explains why MTD keeps expanding rather than being a one-off VAT rule: HMRC's direction of travel is toward digital records becoming the default way UK businesses report, strand by strand, group by group.

Who Needs to Comply with MTD for Income Tax?

MTD for Income Tax is being phased in based on qualifying income - broadly, your total gross income from self-employment and property before expenses. HMRC has set threshold bands that determine when each group of taxpayers must join, with higher-income traders required to comply first and the threshold lowering in stages over time.

Because the exact figures and dates are updated periodically by HMRC, we've kept the full breakdown - including the specific income bands - in a separate guide: MTD qualifying income. If you're below the qualifying threshold, you can continue with ordinary Self Assessment for now, though many small businesses choose to adopt digital record-keeping early so the eventual switch is painless.

If you run a limited company, note that MTD for Income Tax applies to sole traders and landlords reporting through Self Assessment - it does not currently apply to companies filing Corporation Tax returns. If that's you, our guide to accounting software for limited companies covers what actually matters for your structure.

Digital Records and Quarterly Updates

Under MTD for Income Tax, instead of filing one Self Assessment return a year, you'll keep digital records of your business income and expenses throughout the year and send HMRC quarterly updates summarising that activity. At the end of the tax year, you finalise your position with an end-of-period statement and a final declaration, replacing the old single annual submission.

This sounds like more admin, and in one sense it is more frequent - but it's also smaller and less stressful per submission, because you're not reconstructing twelve months of paperwork in one January panic. Our guide on MTD quarterly updates covers the specific deadlines and what each update needs to contain.

What Counts as a "Digital Record" Under MTD?

A digital record, in HMRC's terms, means transactional data - dates, amounts, and categories of income and expenditure - held in a digital form that software can read and use directly, rather than a photo of a receipt sitting unprocessed in a folder or a total scribbled in a notebook. This is where document ingestion earns its keep: scanning a receipt and having the software extract the date, supplier, and amount into a proper digital record is different from simply storing an image. It's also where the rules connect directly to everyday habits like tracking allowable expenses as they happen, rather than reconstructing them from memory months later.

Cash Basis, Accrual, and MTD

MTD doesn't force you into a particular accounting method - most sole traders using the cash basis can continue to do so under MTD for Income Tax, while larger or more complex businesses may use accruals accounting. If you're unsure which applies to you, our guide on cash basis vs accrual accounting explains the difference and why it matters for your quarterly updates.

What Happens If You Get It Wrong: MTD Penalties

HMRC operates a points-based penalty system for late submissions under MTD, rather than an automatic fine for every missed deadline. Points accumulate for missed quarterly updates or late final declarations, and a financial penalty is triggered once a points threshold is reached, with points expiring after a period of compliance. The detail - including how the points reset and what late-payment interest looks like alongside penalty points - is covered fully in our guide to MTD penalties.

The practical takeaway: consistent, on-time digital record-keeping is the best protection against ever seeing a penalty at all. This is exactly where the right software habit pays for itself.

What "MTD-Compatible Software" Actually Means

To comply with either strand of Making Tax Digital, you need software that HMRC recognises as capable of keeping digital records and communicating with its systems via the required digital channel - what's often called HMRC-recognised software or MTD compatible software. This isn't about using any spreadsheet or any accounting app; it specifically means software (or a spreadsheet plus a bridging tool) that can create and maintain digital records and file directly, without you retyping figures into HMRC's own portal.

If you already keep records in a spreadsheet and don't want to abandon it, you don't have to start from scratch - see our guide on MTD bridging software, which lets you keep your spreadsheet and handle just the digital link to HMRC.

For a full walkthrough of what MTD-compatible software needs to do and how to choose it, our dedicated page on Making Tax Digital software is the natural next stop after this guide.

How WDI Billing Approaches Making Tax Digital

Most MTD software is built around the assumption that the taxman is the primary audience for your data. We built WDI Billing the other way round: your books are yours first, and HMRC only sees what you choose to send, when you choose to send it.

WDI Billing runs on three modes:

• Records - your invoices, expenses, and digital records are kept clean, organised, and MTD-ready, with nothing submitted anywhere.
• Prepare (the default) - your VAT return or quarterly update is fully prepared and checked, ready to go, but nothing streams to HMRC automatically. You press file. Nothing leaves your account until you decide it should.
• File - the user-triggered submission itself, sent through the required digital channel once you've reviewed it.

This matters most for MTD for Income Tax, where quarterly submissions mean quarterly opportunities for software to quietly do things on your behalf. With WDI Billing, quarterly updates are prepared automatically from your digital records, but the actual submission is always something you initiate - not a background job running on HMRC's clock instead of yours.

Making Tax Digital and Your Privacy

Being MTD-compliant does not mean handing over real-time visibility of your business to HMRC, or to your software provider. Digital record-keeping is about the format and completeness of what you keep - it's not a mandate for constant automatic reporting beyond the specific VAT returns or quarterly updates the rules require. WDI Billing keeps that distinction firm: your day-to-day books, receipts, and client details stay yours, stored with EU/GDPR data residency, exportable at any time, with no lock-in to a proprietary format. Compliance and privacy aren't in tension - MTD only requires what you file to be accurate and digital, not for your wider business data to be exposed.

If you work with an accountant or bookkeeper, WDI Billing also supports advisor access so they can review or help prepare your figures without you handing over your login - see how that works on our page for accounting software with accountant access.

Common Questions About Making Tax Digital

Does MTD mean HMRC can see my bank account?

No. MTD requires digital record-keeping and digital submission of the figures your VAT return or Income Tax update needs - it does not give HMRC live access to your bank feeds, invoices, or wider business data. What you submit is what you choose to send, and when.

Do I need to buy separate software for VAT and for Income Tax?

Not necessarily. Software built to handle both strands - like WDI Billing - can manage your VAT return and your Income Tax quarterly updates from the same set of digital records, which avoids double entry and keeps your figures consistent across both submissions.

What if I already use a spreadsheet?

You can usually keep it. Bridging software connects a spreadsheet to HMRC's digital channel so you don't have to abandon a system you're comfortable with - see MTD bridging software for how that works in practice.

Is MTD the same as e-invoicing?

No. Making Tax Digital is about record-keeping and submission format for tax purposes; it isn't a requirement to issue invoices in a particular electronic format to customers. The UK currently has no general e-invoicing mandate for business-to-business trading - our guide to e-invoicing in the UK covers that distinction if you've seen the two terms used together.

Getting Started with MTD

If you're not yet required to comply with MTD for Income Tax, the sensible move is to start keeping digital records now, so the eventual switch is a non-event rather than a scramble. If you're a sole trader wondering whether the rules apply to you yet, start with our guide to Making Tax Digital for sole traders. If you're VAT-registered and need to sort out your VAT return today, head straight to MTD VAT software.

Whichever situation you're in, the goal is the same: accurate, digital, HMRC-ready records that stay under your control until the moment you choose to file.

Get MTD-Ready Without Giving Up Control

WDI Billing keeps your digital records clean and MTD ITSA-ready year-round, prepares your VAT returns and quarterly updates automatically, and only ever files when you press the button. Start a free trial and see Making Tax Digital handled properly - on your terms, not your software's. Explore our full range of MTD software or check pricing to get started today.