Making Tax Digital is HMRC's initiative to modernise tax administration by requiring most UK businesses to keep digital tax records and submit VAT returns using compatible software. It applies to businesses above the VAT threshold and self-employed traders above £10,000 annual income.
Making Tax Digital represents the biggest change to UK tax administration in decades. For businesses, it means moving from paper-and-pencil or year-end spreadsheet accounting to continuous digital record-keeping and quarterly tax submissions. The shift is not optional for businesses above the VAT threshold - HMRC enforces MTD rules with penalties starting at £200 per late submission.
For accountants and bookkeepers, MTD reshapes the whole engagement. Instead of collecting shoebox receipts and writing up books once a year, you work with clients who have digital records throughout the year. The work moves upstream: help clients set up the right software, connect it correctly, understand their quarterly tax position, and submit on time. The relationship becomes advisory - "your quarterly VAT is on track" and "you're heading for a profit of £X" - rather than scrambling to file under pressure.
For business owners, MTD offers something rare: real-time visibility into tax. Instead of surprises at year-end ("You owe £8,000 in VAT"), you know your position every quarter. You can adjust pricing, timing of expenses, or hiring based on actual tax liability. The quarterly rhythm also forces discipline - you can't ignore VAT for 11 months and panic in month 12.
MTD is built on a simple principle: businesses keep records digitally, and software submits tax returns directly to HMRC via secure APIs. The flow varies slightly by tax type, but the underlying mechanics are consistent.
For VAT MTD (already live):
You connect your accounting software to HMRC's MTD API using an authorisation token. Your software reads VAT records from your transactions throughout the quarter - VAT-rated sales, acquisitions under reverse charge, VAT paid on expenses. When the quarter ends, the software calculates the VAT return (total sales, VAT, expenses, VAT recoverable, net VAT due), formats it per HMRC specifications, and submits directly. HMRC confirms receipt within seconds. You can view your submission history in HMRC's online portal.
One critical detail: MTD requires "source records" - your original invoices, receipts, and transaction data - to be held digitally. A spreadsheet counts. A PDF of an invoice counts. A photo of a receipt counts. Paper originals are only acceptable if you have a digital copy. VAT invoices must be issued digitally (or paper with a digital copy).
For Self-Employment and Property (launching 2026-2027):
The mechanism is the same, but applied to annual returns. You maintain digital records of all income and expenses throughout the year. Your software aggregates them, calculates your profit (income minus allowable expenses), calculates tax at your marginal rate, and submits to HMRC. The quarterly obligation is softer - HMRC recommends quarterly submissions to spot errors early, but the hard deadline is annual (31 January following the tax year).
Real example:
A freelancer with £60,000 annual income uses MTD-connected accounting software. Every time they invoice a client, the invoice is logged in their software. Every time they buy software, stationery, or pay for a course, they upload the receipt. By March, their software automatically builds their 2025-26 Self-Employment return: shows gross receipts, subtracts allowable expenses (software £1,200, stationery £300, course £500, home office £1,500 = £3,500), calculates profit (£56,500). Tax on £56,500 at 20% = £11,300. The software submits the return and HMRC confirms receipt.
The API layer:
MTD is powered by RESTful APIs. Software vendors integrate with HMRC's API endpoints:
/accounts - retrieve and update account details/obligations - see what returns are due and their status/returns/{returnId} - submit and retrieve returns/liabilities - see what tax is owed/payments - retrieve payment historyAuthentication is OAuth 2.0 - you authorise your software once, and it can access your records until the authorisation expires (18 months) or you revoke it. Two-step verification is required for initial authorisation.
Common mistakes:
Best practices:
Aarvo connects to HMRC's MTD APIs and pulls your VAT position, Self-Employment records, and Property records live. Instead of logging into HMRC's portal and downloading spreadsheets, Aarvo shows you your MTD obligations right on the dashboard: what returns are due, what was submitted, what's outstanding.
When you connect your accounting software (Xero, FreshBooks, or any platform with Aarvo integration), Aarvo automatically calculates your quarterly VAT and shows you the exact return that will be submitted. You can sense-check it before the deadline - "Does £12,400 VAT look right?" - and adjust if needed.
Aarvo also flags upcoming MTD deadlines and tracks payment history, so you're never scrambling on day 30 wondering if you've paid.
Making Tax Digital (MTD) is HMRC's programme to digitalise the UK tax system. From April 2022, most VAT-registered businesses must keep records digitally and submit VAT returns using MTD-compatible software. The system applies to anyone with VAT taxable turnover above £85,000. Self-employed traders and landlords above £10,000 income will be brought into MTD scope from 2026 (Self-Employment Income Tax) and 2027 (Property Income Tax). The aim is to reduce errors, improve compliance, and give businesses real-time visibility into their tax position.
Anyone with VAT taxable turnover above £85,000 must comply with MTD from April 2022. Below £85,000, compliance is voluntary. Businesses in the voluntary window (below £85,000) can choose to use MTD-compatible software now and opt in. From 2026, MTD will expand to include all self-employed traders with income above £10,000 and landlords with property income above £10,000. Exemptions exist for businesses in insolvency, seasonal businesses with turnover below £30,000, and certain other edge cases. Most accountants and bookkeepers will need to comply on behalf of their clients.
VAT MTD is already live as of April 2022 for businesses above £85,000. Self-Employment Income Tax (ITSA) phase one launches April 2026 for unincorporated businesses with income above £10,000. Property Income Tax launches April 2027. Quarterly submissions are required for VAT MTD - returns are due 30 days after the end of each quarter. Corporation Tax is not yet part of MTD; monitor HMRC announcements for future scope. Grace periods exist for new businesses and those experiencing hardship. Penalties for late submission begin at £200 and increase with repeated lateness.
Under MTD, you cannot submit paper tax returns or spreadsheets directly to HMRC. You must use software that is MTD-compatible and certified by HMRC. Your software will hold your records - invoices, expenses, receipts - in digital format throughout the year. At the end of each quarter (for VAT) or year (for Self-Employment and Property), your software calculates the return and submits it directly to HMRC via the MTD API. HMRC confirms receipt instantly. You no longer file once a year; MTD encourages quarterly submissions to give you a real-time tax position and reduce year-end surprises.
You need MTD-compatible software certified by HMRC. There are hundreds of options, from simple spreadsheet-based tools with MTD connectors to full accounting platforms like Xero, FreshBooks, QuickBooks Online, and Wave. Aarvo integrates with HMRC's MTD APIs and pulls VAT position, Self-Employment records, and Property records live from HMRC so you always see your real tax picture. Many accountants use specialised accountancy software; most bookkeeping tools now support MTD. Choose software that matches your complexity: sole trader with a few invoices is different from a growing business with multiple cost streams.
MTD penalties are calculated per submission period. Missing a quarterly VAT deadline incurs a £200 penalty (first late submission), £200 per quarter thereafter. If you persistently fail to file, penalties escalate: two failures within 12 months triggers a £400 flat penalty; three or more failures trigger a daily penalty of £10/day (capped at £20,000 for that period). Monthly payment of VAT must still happen on time regardless; MTD deadlines are for returns only. Careless errors (wrong figures) attract 30% uplift to tax owed. Intentional errors attract 70% uplift. HMRC does grant relief in exceptional circumstances - contact them if hardship applies.
A tax on the profits of UK limited companies. The current main rate is 25% for profits over £250,000, with a smaller rate of 19% for profits under £50,000. Unlike VAT and Self Assessment, Corporation Tax returns are not yet part of HMRC's Making Tax Digital system.
An HMRC Gateway Account is your login to access HMRC online services. It's a username and password you use to file tax returns, access Your Tax Account, submit VAT returns, and interact with HMRC digitally. It's mandatory for any business filing tax online.
Inheritance Tax (IHT) is a UK tax on the estate of a person who has died. It applies to gifts made during life (if within 7 years of death) and assets passed on death, charged at 40% above a threshold (called the nil-rate band).