Cheapest Accounting Software for Sole Traders: Real Costs
Tired of paying for features you'll never use? We break down the real cost of accounting software for UK sole traders, including hidden fees and MTD traps.
April 2026 is closer than it looks, and if your turnover sits above £50,000, HMRC has already decided you need paid software to file your taxes. Not free software. Not a spreadsheet. Paid software. The cheapest accounting software for sole traders is therefore not just a nice-to-have; it is now a compliance cost whether you voted for it or not.
But "cheap" is doing a lot of work in that sentence. A headline price of £3 a month can quietly become £30 once introductory offers expire, add-ons stack up, and VAT gets applied. This post cuts through the pricing theatre to show you what you will actually pay across a full year, and which tools are genuinely lean rather than just marketed that way.
- MTD for Income Tax requires HMRC-approved software from April 2026, making this a mandatory cost for most sole traders above £50,000 turnover.
- Introductory pricing on popular tools often expires after 3-6 months, tripling your monthly cost without any warning email.
- The genuinely cheapest option depends on your use case: MTD-only compliance costs far less than full bookkeeping with invoicing and payroll.
- Free tiers exist but almost none are MTD-compliant, meaning free today could mean non-compliant in 2026.
- TapTax is built specifically for sole trader MTD compliance at a fraction of the cost of full-fat accountancy suites.
Why "Free" Accounting Software Is a Trap for Sole Traders
Let us start with the most searched-for option: free. Wave, GnuCash, and a handful of others offer genuinely free bookkeeping tools. For a freelance designer tracking invoices in 2019, they were fine. For a sole trader who needs to submit quarterly updates to HMRC under MTD for Income Tax, they are almost entirely useless.
HMRC maintains an approved software list for MTD submissions. As of 2025, no fully free tier from any major vendor sits on that list for Income Tax purposes. The free tools that do exist for MTD VAT do not automatically extend their compliance to Income Tax. You would be keeping clean records in a tool that cannot actually submit them to HMRC when the deadline arrives.
The practical risk: you do your bookkeeping all year in a free tool, then discover in January that you cannot file from it. You either pay an accountant to do it last-minute (expensive) or scramble to migrate data to approved software under pressure (error-prone). Neither outcome is cheap.
- MTD-Compliant Software
- Software that has been recognised by HMRC as capable of submitting digital quarterly updates and the End of Period Statement (EOPS) directly to HMRC's systems under Making Tax Digital for Income Tax. Not all accounting software qualifies, and free tiers of paid products are frequently excluded.
The Real Annual Cost: A Comparison
Here is where the honest numbers live. The figures below are based on publicly listed UK pricing as of mid-2025 and assume a sole trader with no employees, no VAT registration, and straightforward income from one trade.
QuickBooks Self-Employed
QuickBooks Self-Employed is frequently the first result when sole traders search for accounting software. Its introductory price is typically around £4-£8 per month. The full price after the promotional period ends sits closer to £12-£16 per month, which is £144-£192 per year. It covers mileage tracking, invoice creation, and a basic tax estimate. It is MTD-ready.
The problem: you are paying for a product with features that overlap significantly with what your accountant already does, or what HMRC's own Self Assessment portal handles. If you are a plumber who just needs to log income, log expenses, and send quarterly updates, QuickBooks Self-Employed is a well-marketed sledgehammer for a small nail.
FreeAgent
FreeAgent is popular among freelancers and is free if you hold a NatWest, Royal Bank of Scotland, or Mettle business account. If you do not, it costs around £19 per month (plus VAT) after an initial discount period, which is roughly £273 per year including VAT.
It is a genuinely capable product. It handles invoicing, expenses, Self Assessment, and MTD. But it is priced for small businesses with staff and complex needs. A sole trader electrician turning over £65,000 with straightforward accounts is funding features they will never open.
We compared FreeAgent and QuickBooks directly in FreeAgent vs QuickBooks Self Employed: Stop Paying for Features You'll Never Use, so there is no need to relitigate that match here.
Xero Starter
Xero's entry-level Starter plan runs at around £16 per month (plus VAT) as of 2025, roughly £230 per year. It caps you at 20 invoices and 5 bills per month, which is fine for most sole traders. It is MTD-ready, well-supported, and widely used by accountants, which is useful if you hand files over to a professional.
The caveat: Xero is an enterprise-grade product that happens to have a small plan. The interface is built for bookkeepers. A self-employed handyman who has never touched accounting software will find the learning curve steep, and Xero's support is patchy unless you are paying for a more expensive plan.
Sage Accounting Start
Sage's entry tier costs around £14 per month (plus VAT), approximately £202 per year. It is MTD-compliant and has been a staple of UK small business accounting for decades. It is solid, if uninspiring. Sole traders report that the mobile app in particular lags behind competitors, which matters if you are logging receipts from a van rather than a desk.
TapTax
TapTax is built for exactly this problem. It is designed specifically for UK sole traders who need MTD compliance without the bloat of a full accountancy suite. The pricing is transparent, the interface is built for people who hate admin, and it does not try to upsell you on payroll modules you will never need. For sole traders whose primary requirement is meeting MTD for Income Tax obligations affordably, it is the most direct route from records to HMRC submission.
What You Are Actually Paying For (And What You Are Not)
The cheapest accounting software for sole traders is not simply the one with the lowest monthly fee. It is the one that charges you only for what you will actually use. To find that, you need to be honest about your requirements.
Most sole traders in the trades, from plumbers to electricians to freelance consultants, need four things from their software:
- A way to log income as it arrives
- A way to record expenses (including receipts) as they happen
- Quarterly submissions to HMRC under MTD
- An end-of-year summary they can use for Self Assessment
They do not need multi-currency support. They do not need payroll for 12 employees. They do not need project-based billing with time tracking across client retainers. Every feature beyond the four above is something a sole trader pays for without using.
The sole trader bookkeeping requirements that HMRC actually demands are less complex than most software vendors would have you believe. The complexity in their products exists to justify the price point, not because your tax situation demands it.
The Hidden Costs Nobody Mentions
VAT on Software Subscriptions
Every figure above is quoted before VAT unless stated otherwise. Add 20% to any monthly fee and your £10 per month becomes £12. Over a year, that is £144 not £120. It is a small thing, but vendors who quote pre-VAT prices in their marketing are relying on you not to notice.
Migration Costs
Switching software mid-year is not free. You either spend time manually re-entering records or pay someone to migrate your data. If you signed up for a cheap introductory offer, realised it was not right, and tried to leave before the price jumped, you may find your data locked in a format that does not export cleanly. Always check the export options before committing.
The "Per Seat" Trap
Some platforms charge per user. If your accountant needs access to your records (which many do for Self Assessment), you may be paying for two seats rather than one. Check whether accountant access is included in the base price or charged separately.
Add-Ons for MTD Specifically
This is the one that catches people. Some software vendors sell their core bookkeeping product cheaply but charge an additional fee for the MTD submission module. The base product keeps your records digitally. The MTD feature is an optional extra. Read the feature comparison tables carefully before assuming MTD is included at the entry-level price.
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The MTD Deadline Changes the Calculation
Before MTD for Income Tax, a sole trader could legitimately run their books on a spreadsheet and file their Self Assessment once a year. The total software cost was zero. That era is ending.
From April 2026, sole traders with qualifying income above £50,000 must submit quarterly updates to HMRC using approved software. From April 2027, the threshold drops to £30,000. From April 2028, to £20,000. If you are in any of those bands, you will need compliant software regardless of whether you want it.
This shifts the question from "do I need to pay for accounting software?" to "which accounting software is the cheapest route to MTD compliance?" The answer to the second question is considerably narrower than the first, because it excludes every tool that cannot actually submit to HMRC.
If you are already using spreadsheets and want to understand your bridging options before committing to a full platform, MTD Bridging Software: A Stopgap or a Trap? covers that trade-off honestly.
A Framework for Choosing Without Overpaying
Step one: establish whether you are above the MTD threshold. If you are, MTD compliance is non-negotiable and your software must be on HMRC's approved list. If you are below, you have more flexibility and a basic bookkeeping tool or spreadsheet remains viable for now.
Step two: list the four core features you actually need (income logging, expense tracking, quarterly MTD submission, Self Assessment summary) and mark off anything beyond that as optional.
Step three: check the post-introductory price, not the headline price. Calculate the annual cost including VAT. If it is above £150 and you have no employees and a single income source, you are paying for features you do not need.
Step four: check the export policy. Can you take your data with you if you leave? Is it a clean CSV or a proprietary format? Your data should never be hostage to a vendor's pricing decisions.
Step five: consider purpose-built tools before general-purpose ones. Software designed specifically for sole traders, rather than small businesses broadly, tends to strip out the complexity that makes general tools expensive. The best tax app for sole traders is almost never the one with the most features.
The Bottom Line on Cheap Accounting Software
The cheapest accounting software for sole traders in 2025 and 2026 is the one that covers your four core needs, sits on HMRC's approved MTD list, and does not charge you for a payroll module you have never opened. That rules out most of the big names at their standard pricing.
TapTax is built for exactly this gap: sole traders who need MTD compliance without the overhead of a full accountancy suite. If your requirements are income, expenses, quarterly submissions, and Self Assessment, you should not be paying for anything beyond that.
The introductory offer you saw in a Google ad will expire. The price on the checkout page almost certainly excludes VAT. And the free tier almost certainly does not include MTD. Start with those three facts, and the decision gets considerably clearer.
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