Best Free MTD-Compatible Software for UK Sole Traders 2026

Written by Calvin Lo, Founder of Aphelios Software | July 2026 | 7 min read

With Making Tax Digital for Income Tax coming into force from April 2026, every UK sole trader earning above £50,000 needs MTD-compatible software to keep digital records and submit quarterly updates to HMRC. The natural first question is: can I get this software for free? The answer is yes - but "free" comes with trade-offs, and understanding those trade-offs is the key to making the right choice for your business.

This guide compares the best free and affordable MTD-compatible software options available to UK sole traders in 2026. We look at HMRC's own free tool, popular accounting platforms like FreeAgent, tax-focused tools like GoSimpleTax, and all-in-one business solutions like Aphelios Software that combine MTD compliance with inventory, POS, and invoicing.

Why You Need MTD-Compatible Software

Before comparing options, it is worth understanding exactly what HMRC requires. Under MTD for Income Tax, your software must:

• Keep digital records of your business income and expenses.
• Submit quarterly income and expense updates to HMRC via their API.
• Generate an end-of-year declaration for your Self Assessment.

Spreadsheets alone do not satisfy these requirements unless paired with bridging software. The tool you choose must connect directly to HMRC's systems. For full details, see HMRC's guidance at GOV.UK – Making Tax Digital for Income Tax step by step.

The Software Options Compared

1. HMRC Free Basic Tool

HMRC has developed a free, browser-based tool specifically for Making Tax Digital for Income Tax. It is designed for sole traders and landlords with straightforward tax affairs - those with a single self-employment income or one or two rental properties.

• Cost: Completely free.
• Features: Digital record-keeping, quarterly update submission, end-of-year declaration.
• Limitations: Basic interface, no invoicing, no inventory management, no payment processing, limited reporting. Not suitable for businesses with complex income or multiple trading names.
• Best for: Freelancers and consultants with simple income and minimal expenses who need the bare minimum to comply.

2. FreeAgent

FreeAgent is one of the most established cloud accounting platforms for UK freelancers and sole traders. It was acquired by NatWest Group and is available at a reduced rate for NatWest, RBS, and Ulster Bank business banking customers.

• Cost: £14.50 per month (or £9.50 per month via NatWest/RBS).
• Features: Full MTD ITSA support, automated tax estimates, self-assessment filing, invoicing, expense tracking, bank feeds, time tracking.
• Limitations: No inventory management, no POS functionality, no CRM. You need separate tools for stock and sales if you sell physical products.
• Best for: Freelancers, consultants, and service-based sole traders who do not sell physical products.

3. GoSimpleTax

GoSimpleTax is a tax-return-focused platform specifically built for Self Assessment. It guides you through entering income and expenses and calculates your tax liability in real time. With MTD ITSA support, it has evolved from a filing tool to a quarterly update platform.

• Cost: From £31.95 per tax year (single user).
• Features: MTD quarterly updates, self-assessment filing, tax liability calculator, HMRC-recognised, supports multiple income types.
• Limitations: No day-to-day accounting, no invoicing, no inventory. It is a tax filing tool, not a business management platform.
• Best for: Sole traders who already manage their bookkeeping separately and just need a straightforward MTD filing solution.

4. Aphelios Software

Aphelios Software is not a free tool, but it offers significant value as an affordable all-in-one platform. For sole traders who sell products - whether at markets, online, or from a shop - Aphelios combines inventory management, POS, CRM, invoicing, and financial reporting with MTD-compatible reporting built in.

• Cost: Flat-rate monthly pricing with no per-user or per-feature charges. Free 14-day trial.
• Features: Inventory tracking, barcode scanning, POS, customer management, sales reporting, expense tracking, MTD-ready financial reports.
• Limitations: Currently focused on product-based businesses rather than service-only sole traders.
• Best for: Market traders, e-commerce sellers, shop owners, and any sole trader who sells physical products and needs MTD compliance alongside day-to-day business tools.

5. Other Notable Options

Several other platforms also offer MTD-compatible software for sole traders:

• Xero: From £15 per month. Strong accounting features, MTD ITSA support, but no inventory or POS at the basic tier.
• QuickBooks Self-Employed: From £10 per month. MTD-compatible, bank feeds, expense categorisation, but limited inventory features.
• Sage Accounting: From £14 per month. Established UK platform with MTD support, invoicing, and bank feeds.
• TaxCalc: From £30 per tax year. Desktop-based Self Assessment software with MTD support for those who prefer not to use cloud tools.

Comparison Table

How to Choose the Right Software

The "best" software depends entirely on your business type. Here is a quick decision framework:

• If your affairs are very simple and you just want to comply: HMRC's free tool is sufficient. It costs nothing and meets the minimum requirements.
• If you are a freelancer or consultant who invoices clients: FreeAgent or Xero gives you proper accounting, invoicing, and MTD support in one place.
• If you just need to file your Self Assessment digitally: GoSimpleTax is purpose-built for this and costs under £35 per year.
• If you sell physical products and need inventory, POS, and MTD compliance: Aphelios Software is the only option that combines all these in a single affordable platform. No need to pay for separate POS, inventory, and accounting tools.

Why "Free" Can Cost You More

While free software meets the minimum MTD requirements, it is worth considering the hidden costs of cobbling together multiple tools. If you sell products, you may need:

• A separate POS system (often £20–£50 per month).
• An inventory management tool (often £15–£40 per month).
• An invoicing platform (often £10–£20 per month).
• An MTD filing tool (either free or £30+ per year).

When you add these up, the total cost often exceeds what an all-in-one platform like Aphelios Software charges for everything combined. More importantly, using multiple disconnected tools creates data silos, increases the risk of errors, and wastes time switching between platforms.

An integrated approach - where your POS, inventory, invoicing, and tax reporting all live in the same system - is not just more convenient. It is more accurate, because every transaction is recorded once and flows through to every report automatically.

Getting Started with MTD-Compatible Software

Here is how to get up and running before the April 2026 deadline:

1. Assess your needs: List what your business actually requires - invoicing, inventory, POS, CRM, tax filing - and match those needs to the software options above.
2. Sign up for free trials: Most paid platforms offer 14- or 30-day free trials. Use this time to test whether the software fits your workflow.
3. Migrate your records: If you are moving from spreadsheets or another platform, most MTD tools offer data import features. Ensure your historical records are digitised.
4. Connect to HMRC: Authorise your software to communicate with HMRC's API. This is usually a one-time setup process.
5. Submit a test update: Before the first real deadline, submit a mock quarterly update to verify everything is working correctly.

Frequently Asked Questions

Is there a free MTD-compatible software from HMRC?

Yes. HMRC offers a free basic tool for Making Tax Digital for Income Tax. It allows sole traders with simple tax affairs to keep digital records and submit quarterly updates at no cost. However, it has limited features and is not suitable for businesses with complex income, multiple streams, or inventory needs.

What is the cheapest paid MTD software for sole traders?

FreeAgent offers MTD-compatible plans from around £14.50 per month (or £9.50 per month via NatWest/RBS if you bank with them). GoSimpleTax starts from approximately £31.95 for the tax year, making it one of the lowest-cost options specifically for self-assessment. Aphelios offers a flat-rate all-in-one plan that includes POS, inventory, and MTD reporting.

Can I use free software if I have both self-employment and rental income?

Yes, but the software must support both income types. HMRC's free tool handles basic self-employment and property income. For more complex situations, paid platforms like FreeAgent or Aphelios provide better support for multiple income streams with automated categorisation.