Self-employed sole traders in the UK need accounting software that handles Self Assessment, Making Tax Digital for Income Tax (live from April 2026 above the qualifying income threshold), and VAT where applicable. FreeAgent, QuickBooks Self-Employed, and Sage Accounting Start are the most adopted entry-level tools. This guide covers what sole traders actually need and where each platform fits.
Last reviewed May 2026
There are approximately 4.2 million self-employed people in the UK, ranging from freelance designers and tradespeople to consultants and gig economy workers. The accounting obligations for a sole trader are less complex than those of a limited company, but they are not trivial: annual Self Assessment returns, quarterly VAT submissions where registered, Class 2 and Class 4 National Insurance Contributions, and - from April 2026 - quarterly digital reporting under MTD for Income Tax Self Assessment. For most self-employed people, the question is not whether to use accounting software but which platform provides the right balance of automation, cost, and HMRC compatibility without requiring an accountant to operate it day-to-day.
What Sole Traders Are Required to Keep Records Of
HMRC requires self-employed individuals to keep records of all business income and expenses for at least five years after the 31 January submission deadline for the relevant tax year. The records must be sufficient to complete an accurate Self Assessment return (SA100 with supplementary SA103 for self-employment income) and, if VAT-registered, to complete Making Tax Digital for VAT returns. HMRC's self-employed records guidance specifies that records must include all sales invoices and receipts, bank statements, evidence of allowable expenses, and records of business mileage where mileage allowance is claimed.
The key distinction in expense recording is between allowable and disallowable expenses. HMRC's guidance on self-employed expenses covers the main categories: office costs, travel and subsistence, stock and materials, financial costs (bank charges, accountancy fees), and the use of home as office. Mixed-use expenses - a mobile phone used for both business and personal calls, for example - must be apportioned, and the method of apportionment must be reasonable and consistent. Accounting software that prompts for expense categorisation at the point of entry, rather than requiring retrospective categorisation, significantly reduces year-end reconciliation work.
ICAEW's Self Assessment guidance notes that sole traders with complex affairs - multiple income sources, significant capital expenditure, or overseas income - should consider working with a qualified accountant even if they use self-service software for day-to-day bookkeeping. The software does not replace professional judgement on borderline expense claims or tax planning decisions.
Making Tax Digital for Income Tax: What Changes from April 2026
MTD for Income Tax Self Assessment (MTD ITSA) is the most significant change to self-employed tax administration in a generation. From April 2026, sole traders and landlords with qualifying income (self-employment income plus property income) above £50,000 must submit quarterly digital updates to HMRC, summarising their income and expenses for each three-month period. Annual reconciliation and a final declaration replace the current single annual Self Assessment return.
From April 2027, the threshold drops to £30,000. HMRC has confirmed that the £20,000 threshold originally proposed for a later phase will be consulted on separately. The MTD ITSA programme page on GOV.UK provides the current timetable and compatibility requirements.
The practical implication is that sole traders above the threshold who have historically done their own tax return at year-end using a spreadsheet or basic software must move to an MTD-compatible platform that can generate the quarterly update submissions. HMRC publishes a register of MTD ITSA-compatible software; all the major platforms discussed in this article appear on it, but sole traders should verify current status before committing to a subscription.
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Platforms Suited to Self-Employed Sole Traders
The self-employed accounting software market in the UK divides into tools designed primarily for sole traders and entry-level tiers of broader small-business platforms. The distinction matters: a full-featured small-business platform carries features (payroll, multi-currency, inventory management) that most sole traders will never use, while paying for them via the subscription price.
FreeAgent is the most widely used dedicated sole trader platform in the UK, partly because it is bundled free with NatWest, Royal Bank of Scotland, and Mettle business bank accounts. It handles Self Assessment preparation, MTD for VAT, and will support MTD ITSA when mandatory. Its income and expense tracking is straightforward, and its Self Assessment estimate feature updates a running tax liability figure as transactions are entered - useful for quarterly budgeting.
QuickBooks Self-Employed targets the gig economy worker and freelancer market with a stripped-down mobile-first interface. It automates the separation of personal and business transactions from a connected bank account and generates a Self Assessment summary, but its MTD ITSA capability is less fully developed than FreeAgent's and it does not support VAT returns natively - a gap for VAT-registered sole traders.
Sage Accounting Start (formerly Sage One) and Xero Starter are entry-level tiers of broader SME platforms that can serve sole traders needing VAT, invoicing, and basic expense management. They cost more than the dedicated sole trader tools but offer a growth path to more capable tiers without migrating platforms as the business grows.
| Platform | MTD ITSA Ready | VAT Returns | Self Assessment | Starting Price |
|---|---|---|---|---|
| FreeAgent | Yes | Yes | Yes (SA103) | Free with eligible bank accounts |
| QuickBooks Self-Employed | Partial | No | Summary only | From approx. £8/mo |
| Sage Accounting Start | Yes | Yes | Via accountant export | From approx. £15/mo |
| Xero Starter | Yes | Yes | Via accountant export | From approx. £16/mo |
| Coconut | Yes | Yes | Yes | From approx. £9/mo |
VAT Registration and Flat Rate Scheme for Sole Traders
Sole traders with taxable turnover above £90,000 (the VAT registration threshold as of May 2026) must register for VAT. Many sole traders in service industries choose to register voluntarily below the threshold, either to reclaim input VAT on purchases or to project a more established business image to corporate clients. Once registered, all invoices to VAT-registered business customers must show the VAT number, the VAT rate applied, and the VAT amount separately.
The Flat Rate Scheme (FRS) simplifies VAT accounting for businesses with taxable turnover below £150,000. Under FRS, the sole trader charges VAT at the standard rate to clients but pays HMRC a fixed percentage of gross (VAT-inclusive) turnover, with the percentage varying by trade sector. The difference between the VAT collected and the FRS amount is retained and represents a cash benefit for many service-based sole traders. HMRC's Flat Rate Scheme guidance sets out the sector percentages and eligibility conditions. Accounting software must be able to handle both standard VAT and FRS calculations, as the VAT return is prepared differently under each method.
Expense Categories Sole Traders Most Often Get Wrong
Three categories generate the most HMRC enquiries for sole traders. Home office expenses are the first: where a sole trader works from home, they can claim a proportion of household costs (heating, broadband, insurance) or use HMRC's simplified flat rate, currently £26 per month for 51-100 hours worked per month. Claiming the actual proportion requires a defensible calculation based on rooms used and hours worked, and the software should prompt for the chosen method.
Capital versus revenue expenditure is the second area. Equipment purchases above a certain value are capital expenditure eligible for the Annual Investment Allowance (AIA), not a revenue expense deductible in the year. Accounting software that allows equipment to be coded directly to an expense account without flagging the capital treatment will understate taxable profits in the year of acquisition and misstate the balance sheet. The third area is private use adjustment: a sole trader who uses their car for both business and personal journeys can only claim the business proportion of actual motoring costs, or use HMRC's mileage allowance rates (currently 45p per mile for the first 10,000 miles).
FAQ
Does a sole trader need accounting software or can they use a spreadsheet?
A spreadsheet is sufficient for record-keeping for sole traders below the MTD ITSA threshold until April 2026. Above the threshold (initially £50,000 qualifying income), HMRC requires MTD-compatible software that can generate digital quarterly submissions. Spreadsheets cannot do this natively, though bridging software exists that can read a spreadsheet and submit to HMRC - an approach HMRC permits but considers a transitional workaround.
When must sole traders join Making Tax Digital for Income Tax?
Sole traders with qualifying income (self-employment plus property) above £50,000 must join MTD ITSA from April 2026. The threshold drops to £30,000 from April 2027. Sole traders below £30,000 are not currently mandated, though they may voluntarily join. HMRC's MTD ITSA programme page has the current confirmed timetable.
Is FreeAgent genuinely free for NatWest and RBS customers?
FreeAgent is provided free of charge to NatWest, Royal Bank of Scotland, and Mettle business account holders as part of their account package, with no subscription fee charged directly. If the business bank account is closed, the FreeAgent subscription reverts to a paid plan unless cancelled. The free provision covers the full FreeAgent feature set, including Self Assessment and MTD for VAT.
Can sole traders claim their accountant's fees as a business expense?
Yes. Accountancy fees incurred wholly and exclusively for business purposes - including preparation of Self Assessment returns relating to self-employment income - are an allowable business expense. Fees for advice on personal tax matters that are not related to the trade are not allowable. Most accounting software platforms allow professional fees to be coded to a specific expense category for this purpose.
What happens if a sole trader misses the MTD ITSA quarterly deadline?
HMRC's penalty regime for MTD ITSA uses a points-based system. Each missed submission accrues a penalty point; when accumulated points reach a threshold, a financial penalty is charged. Points expire after a set period of compliance. HMRC published the MTD ITSA penalty regime details in Finance Act 2021; the system mirrors the approach already used for MTD for VAT penalties.
How We Verified
This article draws on HMRC's self-employed record-keeping guidance, the MTD for Income Tax Self Assessment programme documentation, HMRC's Flat Rate Scheme guidance, and ICAEW's Self Assessment resources. Pricing figures are indicative as of May 2026 and subject to change. Vendor capability claims reflect publicly available product information. No vendor has paid for inclusion or editorial placement. Sole traders with complex affairs should take advice from a qualified accountant.
