Making Tax Digital 2026: What UK Small Businesses Must Do Now
- 6 April 2026: the date HMRC stops accepting annual self-assessment as the norm
- What does MTD for Income Tax mean for a business earning £50k–£500k?
- What are the three things you need to do before April 2026 to comply with MTD?
- How AskBiz flags MTD risk before your accountant does
- What warning signs tell you your MTD compliance is already off track?
- Your MTD action plan for this week
From 6 April 2026, HMRC requires any UK self-employed person or landlord earning over £50,000 to file quarterly digital tax updates instead of an annual self-assessment return. Miss the deadlines and you face a new points-based penalty system that escalates fast. Get MTD-compatible software set up now — not in March 2026.
- 6 April 2026: the date HMRC stops accepting annual self-assessment as the norm
- What does MTD for Income Tax mean for a business earning £50k–£500k?
- What are the three things you need to do before April 2026 to comply with MTD?
- How AskBiz flags MTD risk before your accountant does
- What warning signs tell you your MTD compliance is already off track?
6 April 2026: the date HMRC stops accepting annual self-assessment as the norm#
The annual self-assessment return — the one UK self-employed people have filed every January since 1997 — is being retired for anyone earning above £50,000. From 6 April 2026, Making Tax Digital for Income Tax Self Assessment (MTD ITSA) becomes mandatory for self-employed individuals and landlords whose gross income from those sources exceeds that threshold. The £50,000 figure is based on your 2024/25 tax year income. That year is already closed. If you turned over more than £50k from self-employment or property rental last year, you are in scope. Not 'might be'. Are. Before April 2026: one self-assessment return per year, filed by 31 January. After April 2026: four quarterly digital updates per year, plus a final end-of-period statement, plus a declaration. That is six filing events where there used to be one. Per Fleximize's 2026 SME tax guide, this means keeping your business records in a digital format compatible with HMRC's systems — not a spreadsheet you've been running since 2018, unless it connects to approved software. The scope expands in April 2027, when the threshold drops to £30,000. April 2028 brings it down to £20,000. HMRC isn't piloting this — it's a staged rollout with firm dates. Why now? HMRC's stated goal is to close the UK's £36 billion annual tax gap, a significant portion of which it attributes to record-keeping errors and late or inaccurate self-assessment filings. Quarterly reporting gives HMRC near-real-time visibility of your income. It also removes the 'I forgot about that invoice' problem that costs the Treasury billions annually. This isn't optional. It isn't being delayed again. The April 2026 wave is live.
What does MTD for Income Tax mean for a business earning £50k–£500k?#
Take a Bristol-based sole-trader architect billing £74,000 a year. Previously: one self-assessment return filed by 31 January, using figures pulled from a mix of bank statements and a Numbers spreadsheet. Time cost: roughly six hours a year, plus accountant fees. From April 2026, that same architect must submit quarterly updates covering income and expenses for each three-month period — April to June, July to September, October to December, January to March. Each update must go through MTD-compatible software that connects directly to HMRC. Then comes a final end-of-period statement consolidating the year, followed by a formal declaration. Six separate filing events. The time cost isn't the only issue. The software cost is real. MTD-compatible platforms — QuickBooks, Xero, FreeAgent, Sage — range from roughly £12/month to £35/month for sole traders on entry-level plans. That's £144–£420 per year on top of any existing accountant arrangement. For a sole trader running on thin margins, that's a line item that didn't exist 18 months ago. The penalty risk is sharper than most people realise. HMRC is moving to a points-based system for late submissions. Each missed quarterly update earns a penalty point. Accumulate enough points and you face a £200 fixed penalty, with further fines for persistent non-compliance. Unlike the old regime where one late annual return triggered one fine, four quarterly deadlines mean four opportunities per year to rack up points. If you're also VAT-registered — which you will be if you're turning over more than £90,000 — you've been in MTD for VAT since April 2022. MTD ITSA is a separate obligation on top. Two digital compliance regimes, running in parallel, with different software requirements that may or may not overlap depending on your setup.
What are the three things you need to do before April 2026 to comply with MTD?#
**First: confirm your 2024/25 gross income and whether you're in scope.** Check your self-assessment records or ask your accountant for your total self-employment and rental income for the year ending 5 April 2025. If it exceeds £50,000, you have no exemption route unless you can demonstrate digital exclusion — a narrow category that HMRC defines very strictly. Don't assume your accountant has flagged this. Many smaller practices are still working through client lists. **Second: select and sign up for HMRC-recognised MTD-compatible software before 6 April 2026.** HMRC maintains a live list of approved software on GOV.UK. Xero, QuickBooks, FreeAgent, and Sage are all on it. The critical detail: you must sign up for MTD ITSA through the software or directly with HMRC — it doesn't happen automatically because you file self-assessment. Sign up too late and you may receive an automatic penalty point even if your quarterly filings are on time. Do this by February 2026 at the latest to allow time for data migration. **Third: restructure your bookkeeping cadence from annual to quarterly, starting now.** The biggest compliance failure will come from people who treat MTD like the old self-assessment and scramble at the deadline. Your quarterly update for April–June 2026 is due by 5 August 2026. That's 60 days after quarter end. Build a monthly reconciliation habit — 90 minutes at the end of each month categorising income and expenses in your MTD software. By the time August arrives, your Q1 update takes 20 minutes rather than a panicked three-day catch-up. The businesses that fail MTD compliance won't be the ones who chose the wrong software. They'll be the ones who kept treating their books as an annual exercise.
How AskBiz flags MTD risk before your accountant does#
A sole-trader web designer in Manchester has Xero connected to AskBiz. In early March 2026, she types: 'Am I on track to meet my April MTD deadline and do I have any income I haven't categorised yet?' AskBiz pulls her live Xero data and returns three things. One: her year-to-date gross income sits at £61,400 — confirmed in scope for MTD from 6 April. Two: 23 transactions totalling £4,100 are sitting uncategorised in Xero, which would create an incomplete quarterly submission. Three: her MTD software sign-up hasn't been completed, flagged because AskBiz can see her Xero account isn't yet linked to an HMRC MTD gateway. She fixes the uncategorised transactions the same afternoon and books a 20-minute call with her accountant to complete the HMRC sign-up. Total time: two hours. The alternative — discovering the gap in late July when Q1 is due — would have been a penalty point, a panicked reconciliation, and probably an emergency accountant fee. AskBiz's CFO Dashboard tracks expense categorisation in real time, so incomplete records surface as a metric rather than a nasty surprise. Its proactive alerts can be configured to flag uncategorised transactions weekly via WhatsApp — before they accumulate into a compliance problem. You don't need to remember to check. It tells you.
What warning signs tell you your MTD compliance is already off track?#
Four signals to check this week: **Your bookkeeping is more than 30 days behind.** If you haven't reconciled transactions since last month, your Q1 2026 update will be built on incomplete data. That's not just an MTD risk — it's a penalty risk from day one. **You don't know whether your current software is MTD-compatible.** Excel and Google Sheets are not. Neither is most legacy accounting software unless it has a specific MTD module. Check HMRC's approved software list at gov.uk today — not when Q1 is due in August. **Your income is close to the £50,000 threshold and you haven't confirmed your 2024/25 figure.** The threshold is gross income, not profit. If you had a stronger year than expected, you could be in scope without realising it. Check your total receipts, not your taxable income. **You're VAT-registered but treating MTD ITSA as 'the same thing'.** It isn't. They have separate sign-up processes, separate submission portals, and separate penalty regimes. Being compliant for MTD VAT does not make you compliant for MTD ITSA.
Your MTD action plan for this week#
**Before Friday:** Pull your 2024/25 gross self-employment and rental income and compare it to £50,000. If you're over, go to gov.uk and search 'sign up for Making Tax Digital for Income Tax' — start the process today, not in Q1 2026. **Set up once:** Choose and subscribe to an HMRC-approved MTD software platform. If you already use Xero or QuickBooks, check whether your current plan includes MTD ITSA functionality or whether you need an upgrade. Link it to your HMRC account through the MTD sign-up flow. This is a 45-minute task. Do it once. **Track monthly:** Uncategorised transactions as a percentage of total transactions. Target zero by the end of each month. If that number is climbing — three months of transactions sitting unlabelled in your accounting software — your quarterly update will be wrong, and a wrong quarterly update triggers the same penalty points as a missed one. Set a calendar reminder for the last working day of each month: reconcile, categorise, done.
People also ask
When does Making Tax Digital for Income Tax start for small businesses?
MTD for Income Tax Self Assessment (MTD ITSA) starts on 6 April 2026 for self-employed individuals and landlords with gross income above £50,000 in the 2024/25 tax year. The threshold drops to £30,000 in April 2027 and £20,000 in April 2028. Compliant founders are signing up for approved software and restructuring bookkeeping now, not in March 2026.
What software do I need for Making Tax Digital 2026?
You need HMRC-recognised MTD-compatible software — Xero, QuickBooks, FreeAgent, and Sage are all approved. Spreadsheets and legacy accounting tools do not qualify unless they have a certified MTD module with a direct HMRC connection. Check the official GOV.UK approved software list and sign up through your chosen platform before 6 April 2026.
What are the MTD penalties for missing a quarterly deadline?
HMRC uses a points-based penalty system for MTD ITSA. Each missed quarterly update earns one penalty point. Once you reach the threshold — four points for quarterly filers — you face a £200 fixed penalty. Additional late payments incur separate interest charges. Four filing deadlines per year means four chances annually to accumulate points, unlike the old single annual return.
What is Making Tax Digital for VAT and how is it different from MTD ITSA?
MTD for VAT has applied to VAT-registered businesses since April 2019 (mandated for all VAT-registered businesses from April 2022). MTD ITSA is a separate regime covering income tax for sole traders and landlords, starting April 2026. They have different sign-up processes, different software requirements, and different penalty systems. Being MTD-VAT compliant does not make you MTD ITSA compliant.
How does AskBiz help with Making Tax Digital compliance?
AskBiz connects to Xero and QuickBooks and flags uncategorised transactions, incomplete records, and missed reconciliation periods in real time through its CFO Dashboard. Founders can ask plain-English questions like 'Do I have any uncategorised income this quarter?' and get an instant answer grounded in their live accounting data — before a quarterly MTD deadline creates a penalty risk.
Alice Watson is AskBiz's Head of Market Intelligence. She tracks regulatory shifts, pricing trends, and growth signals across global SME markets — and turns them into briefings founders can act on before their competitors notice.
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