How to Set Up MTD-Compliant Software in London: The 2026 Complete Guide
Setting up MTD-compliant software in London means choosing HMRC-approved digital tools, registering with HMRC’s MTD service, and linking your accounting records so they submit tax data automatically. Whether you’re a sole trader, landlord, or SME director in London, Making Tax Digital is no longer optional — and the April 2026 deadline is fast approaching.
Imagine this: it’s January, your accountant calls to say your quarterly digital tax submission is overdue, and you haven’t even linked your software to HMRC yet. For hundreds of London businesses every year, this scenario is all too real.
At GM Professional Accountants, we’ve helped hundreds of London-based businesses navigate MTD compliance. In this guide, we’ll walk you through exactly how to set up MTD-compliant software — step by step — from choosing the right tool to submitting your first return.
What Is Making Tax Digital (MTD) and Who Does It Apply To?
Making Tax Digital (MTD) is a UK government initiative that requires businesses and individuals to maintain digital tax records and use compatible software to submit returns directly to HMRC. It was introduced in phases — starting with VAT-registered businesses in 2019 — and is now being extended to income tax.
| MTD Phase | Who It Applies To | Key Deadline | Status |
|---|---|---|---|
| MTD for VAT | All VAT-registered businesses | April 2022 | ✓ Mandatory now |
| MTD for ITSA | Sole traders & landlords >£50k/yr | April 2026 | ⚡ Approaching |
| MTD for ITSA | Sole traders & landlords >£30k/yr | April 2027 | ⚡ Upcoming |
| MTD for ITSA | Sole traders & landlords >£20k/yr | April 2028 | ○ Planned |
| MTD for Corp Tax | Limited companies | TBC (post-2026) | ○ Planned |
The April 2026 MTD for ITSA deadline has been confirmed. Businesses earning over £50,000 must be using compliant software by that date or face penalties. HMRC has stated there will be no further postponements.
How to Choose the Right MTD-Compliant Software in London
Not all accounting software is MTD-compliant. HMRC maintains a list of software suppliers that have been recognised as compatible with their APIs. Your first step is choosing a tool that fits your business type, budget, and technical comfort level.
HMRC API Connection
Direct API link to HMRC — not just a spreadsheet bridge. Essential for MTD for ITSA.
Real-Time Tax Estimates
Know your tax liability every quarter — not just in January when it’s too late.
Bank Feed Integration
Auto-import transactions to reduce manual data entry by up to 80%.
Mobile Receipt Capture
Photograph receipts on your phone and auto-extract data — no more lost invoices.
MTD Software Comparison: Which Is Right for You?
| Software | Best For | MTD VAT | MTD ITSA | Price/mo |
|---|---|---|---|---|
| QuickBooks Online | SMEs & sole traders | ✓ | ✓ | £12–£35 |
| Xero | Growing businesses | ✓ | ✓ | £15–£42 |
| FreeAgent | Freelancers & contractors | ✓ | ✓ | £19 |
| Sage Business Cloud | SMEs with inventory | ✓ | ✓ | £30–£69 |
| Rhino / TaxCalc | Landlords & property | ✓ | ✓ | £10–£25 |
| Kashflow | Small businesses | ✓ | In dev | £9–£20 |
For a full verified list, visit the HMRC approved MTD software finder ↗.
Step-by-Step: How to Set Up MTD-Compliant Software in London
Work through each step below and tick off as you go. Estimated total time: 2–3 hours for most London businesses.
- 1
Confirm Your MTD Obligations
Check your turnover against the current MTD for ITSA thresholds. If you’re VAT-registered, you must already be using MTD for VAT. Use the HMRC MTD eligibility checker to confirm your status.
- 2
Choose and Subscribe to MTD Software
Select from the comparison table above. Sign up for a free trial (most providers offer 30 days). Set up your business profile: company name, UTR, and VAT number. Connect your bank account via Open Banking for automatic transaction imports.
- 3
Register for MTD with HMRC
Log in to your Government Gateway account. Navigate to ‘Make Tax Digital’ and select ‘Sign up for Making Tax Digital for Income Tax’. Enter your UTR, NI number, and business type. HMRC will confirm via email within 72 hours.
- ⚠️ You cannot register within 3 months of your accounting period end — plan ahead
- Full guidance: GOV.UK MTD ITSA sign-up ↗
- 4
Authorise Your Software to Connect to HMRC
Inside your MTD software, go to Settings > Connections or Tax Integrations. Select ‘Connect to HMRC’ and log in using your Government Gateway credentials. Grant the software permission to submit returns on your behalf.
- 5
Set Up Digital Record Keeping
Categorise all income sources within the software. Import historical records from the start of your current tax year. Set up expense categories in line with HMRC’s allowable expenses. Use the mobile app to photograph receipts.
- 6
Submit Your First Quarterly Update
MTD for ITSA requires 4 quarterly updates per year — income/expense summaries, not full tax returns. Navigate to ‘Tax Submissions’ in your software, review auto-populated data, and click ‘Submit to HMRC’. An annual End of Period Statement (EOPS) replaces your Self Assessment return.
Book a 30-minute onboarding call with our team before you set up your software. We’ll check your HMRC registration, configure your chart of accounts correctly, and ensure your first quarterly submission goes smoothly. Many clients save 3–5 hours per quarter with proper setup from day one.
MTD Costs, Compliance & HMRC Penalties
One of the most common questions we hear from London businesses is: “What happens if I don’t comply with MTD?” The answer: financial penalties, and in some cases, a full HMRC compliance check.
| Software Cost (Annual) | Potential HMRC Penalty for Non-Compliance |
|---|---|
| QuickBooks: £144–£420/yr | Late registration: £200 fixed penalty |
| Xero: £180–£504/yr | Failure to keep digital records: up to £3,000 |
| FreeAgent: £228/yr | Late quarterly submission: points-based system |
| Sage: £360–£828/yr | Serious non-compliance: daily interest charges |
HMRC operates a points-based penalty system for late submissions. Each late quarterly update earns 1 point. At 4 points, a £200 penalty is triggered. Further defaults add £200 per submission. See HMRC’s MTD penalties guidance ↗.
Real Client Story: How a London Landlord Got MTD-Ready
Daniel, London Landlord — Anonymised Case Study
The Problem
Daniel received an HMRC nudge letter about MTD. He had no accounting software, records split across spreadsheets and paper receipts, and no Government Gateway linked to MTD. With income above £50k, he faced mandatory MTD for ITSA from April 2026.
Our Solution
- Registered for MTD for ITSA pilot programme
- Set up Rhino Accounts (landlord MTD software)
- Imported 2 years of historical rental data
- Connected bank feeds for auto-categorisation
- Submitted first quarterly update on his behalf
The Result
Tax liability now estimated in real time. Daniel knows his January bill by October. Fully audit-ready records. Annual time saving: 8 hours vs his previous manual process.
⭐ “GM Professional Accountants made the whole MTD process stress-free. I went from a box of receipts to quarterly digital submissions in under two weeks.” — East London landlord, 2024
Common MTD Setup Mistakes and How to Avoid Them
Registering for MTD Before Your Software Is Ready
HMRC starts the clock when you register. Always set up and test your software before completing HMRC registration — or you may miss your very first quarterly deadline.
Using Software Not on HMRC’s Approved List
Some tools claim to be ‘MTD-ready’ but aren’t API-connected to HMRC. Always verify on the official HMRC software finder. Non-approved software means your submissions may never reach HMRC.
Confusing MTD for VAT With MTD for ITSA
These are separate systems with different portals, schedules, and software requirements. Being VAT-compliant does NOT automatically make you income tax compliant.
Ignoring the End of Period Statement (EOPS)
Quarterly updates are summaries — not full returns. You still need to file an EOPS and Final Declaration at year end. Missing this triggers penalty points immediately.
Not Telling Your Accountant
If you sign up and set up software without informing your accountant, they won’t be able to access your records. Always add your accountant as an ‘agent’ within your software and notify HMRC of their authorisation.
Frequently Asked Questions About MTD Software in London
Key Takeaways: Your MTD Action Plan
- MTD for VAT is already mandatory for all VAT-registered businesses in London
- MTD for Income Tax applies from April 2026 if your income exceeds £50,000/yr
- Choose HMRC-approved software from the official list — spreadsheets alone are not compliant
- Register with HMRC, authorise your software, and set up digital records before your deadline
- Submit 4 quarterly updates per year plus an annual End of Period Statement
- Work with a qualified London accountant to avoid costly setup mistakes
Get MTD-Ready with GM Professional Accountants
Our London-based team offers a free 30-minute MTD consultation. We’ll review your current setup, recommend the right software, and handle your HMRC registration — so you can focus on running your business.
Book Your Free MTD Consultation →Authoritative Sources & Further Reading
- HMRC Making Tax Digital — full overview (GOV.UK)
- HMRC MTD for Income Tax sign-up guide (GOV.UK)
- HMRC approved MTD software finder (GOV.UK)
- HMRC MTD penalties guidance (GOV.UK)
- ICAEW Making Tax Digital technical hub
- GOV.UK — Digital record keeping requirements
- Companies House — UK business filing requirements
