MTD Income Tax Software for Accountants: Cost Per Client
The cheapest MTD for Income Tax software for accountants is a flat practice fee rather than a per-client subscription: as of October 2026, Clear Books says it charges £50 a month for unlimited non-VAT clients, against £900 a month for 50 clients on Xero Ignite at £18 each. The right choice still depends on who pays, which ledger each client already uses, and how many clients are VAT-registered.
TL;DR:
- Per-client ledger subscriptions cost £10 to £20 a month for a sole trader, so 150 clients cost £1,500 to £3,000 a month if the practice pays.
- Clear Books says £50 a month covers unlimited non-VAT clients, and it pays for itself from 17 clients against its own £3 pay-as-you-go rate.
- Sole traders and landlords with qualifying income over £50,000 had to start on 6 April 2026; the £30,000 group starts on 6 April 2027 and the £20,000 group on 6 April 2028.
- There are no penalties for missing a quarterly update in 2026 to 2027, but the points system with a £200 penalty at 4 points applies from the following year.
- Bridging software, Dext capture and Sage or TaxCalc agent tools sit on top of a ledger, so price the whole stack, not one line.
Table of Contents
- What is the cheapest MTD for Income Tax software for accountants?
- What must the software actually do?
- How much does it cost at 50, 150 and 300 clients?
- Where is client data held, and can the tool write back?
- Is a flat practice fee better than per-client pricing?
- Which tools fit which kind of practice?
- What should you charge clients on top of the software?
- Why does independent evidence matter when choosing MTD for Income Tax software?
- Realistic expectations: software is the cheap part
- Find your next MTD for Income Tax software tool through The AI Ledger
- Frequently asked questions
What is the cheapest MTD for Income Tax software for accountants?
At scale, the cheapest route is a vendor that charges per practice, not per client. Clear Books says £50 a month covers unlimited non-VAT clients and £100 covers a whole practice including VAT-registered clients. Its pay-as-you-go rate is £3 per non-VAT client and £9 per VAT-registered client, each per month.
Clear Books is not in The AI Ledger directory, so it has no editor score and we have not assessed it beyond its published pricing. Treat the figures as the vendor's own.
If your clients already run on Xero, FreeAgent or QuickBooks, the cheapest option is often the one the client already pays for. The software cost then sits on the client's bill, and the practice's cost is the time spent on quarterly updates. That is why the comparison below shows both views.
Pro Tip: Ask each client who is paying for the software before you compare vendors. A £19 a month ledger paid by the client costs your practice nothing, while the same ledger paid by you across 150 clients costs £2,850 a month.
What must the software actually do?
HMRC says compatible software must create, store and correct digital records of self-employment and property income and expenses, send quarterly updates, and support the tax return. The GOV.UK software guidance was last updated on 13 July 2026.
There are two broad types. Software that creates digital records links to a bank, scans receipts or takes manual entries. Bridging software connects to spreadsheets or other tools and makes the submissions for you.
You can use more than one product, but only one product for each separate submission. A landlord cannot send quarterly property updates from two products. The tools must also work together to meet every requirement, so a cheap bridging layer on top of a poor record-keeping tool can cost more in rework than it saves.
The quarterly deadlines for 2026 to 2027 are 7 August, 7 November, 7 February and 7 May. Missing one carries no penalty this year, according to HMRC's penalties guidance. From the following tax year, each missed deadline earns a penalty point, and reaching 4 points brings a £200 penalty.
How much does it cost at 50, 150 and 300 clients?
At list prices, a practice paying for 150 non-VAT sole-trader clients spends between £450 and £3,000 a month depending on the product, and £50 on a flat-fee plan. The table multiplies each published monthly price by client numbers, ex VAT, with no introductory discounts. Introductory offers lower the first six months only.
| Tool | Editor score | Monthly list price per client | Cost at 50 / 150 / 300 clients |
|---|---|---|---|
| Xero Ignite | 4.5 out of 5 | £18 | £900 / £2,700 / £5,400 |
| FreeAgent, sole trader | Not listed | £19 | £950 / £2,850 / £5,700 |
| FreeAgent, landlord | Not listed | £10 | £500 / £1,500 / £3,000 |
| QuickBooks Sole Trader Plus | 4.3 out of 5 | £10 (third-party figure) | £500 / £1,500 / £3,000 |
| Fiskl Solo | 4.0 out of 5 | £20 | £1,000 / £3,000 / £6,000 |
| HelloBooks Pro | 4.0 out of 5 | £14.99 | £749.50 / £2,248.50 / £4,497 |
| Clear Books, pay as you go | Not listed | £3 | £150 / £450 / £900 |
| Clear Books, unlimited non-VAT | Not listed | £50 flat | £50 / £50 / £50 |
| Dext Solo, capture only | 4.7 out of 5 | £2.50 | £125 / £375 / £750 |
The sums are simple: Xero Ignite at £18 across 150 clients is 150 × £18 = £2,700 a month, or £32,400 a year. Clear Books at £50 flat is £600 a year. The gap is large, but the products are not identical, and a flat fee only helps if your clients will move onto that ledger.
Sources for the prices: Xero lists Ignite at £18 a month ex VAT after a six-month introductory price of £1.80. FreeAgent lists £19 a month for UK sole traders and £10 for unincorporated landlords, with 50% off for the first six months. The QuickBooks £10 figure comes from Startups.co.uk, because QuickBooks' own page did not show a base price when we checked. The Fiskl, HelloBooks and Dext figures come from the directory's pricing summaries, last verified on 10 October 2026.
Two caveats matter. Fiskl's pricing page shows MTD filing to HMRC as arriving in October 2026, so confirm it is live and HMRC-recognised before moving any client. HelloBooks lists MTD compatibility, but the listing says its HMRC status needs checking before VAT filing.
Where is client data held, and can the tool write back?
Few vendors state both where client data is hosted and whether they train models on it. The table records only what the vendor's pages or our directory record say, and "not stated" means we did not find it in the sources read.
| Tool | Where client data is hosted | Vendor says it trains on client data | Reads only or writes back |
|---|---|---|---|
| Xero | Not stated in sources read | Not stated | Full ledger: creates records and files updates |
| QuickBooks | Not stated in sources read | Not stated | Full ledger: creates records and files updates |
| FreeAgent | Not stated in sources read | Not stated | Full ledger: creates records and files updates |
| Dext | EU storage, ISO 27001 certified per the directory record | Not stated | Captures documents and publishes to the ledger |
| HelloBooks | Not stated; SOC 2 Type II stated by the vendor | Not stated | Full ledger |
| TaxCalc | Not stated in sources read | Not stated | Imports trial balances and files returns |
Do not read "not stated" as "no". It is a prompt to ask the vendor in writing before you put 150 clients' income records into a new system.
Pro Tip: Put hosting location and AI-training terms in your engagement letter template for MTD clients, and record the vendor's written answer on the client file.
Is a flat practice fee better than per-client pricing?
A flat fee wins once client numbers pass a break-even point, and Clear Books says its flat £50 plan pays for itself from 17 clients. That is £50 divided by £3 a client, which is 16.7, so 17 clients is the first number where the flat fee is cheaper.
The mix of clients changes the sum. Clear Books' own example is 30 non-VAT clients and 10 VAT-registered clients: £180 a month pay as you go (30 × £3 + 10 × £9), £140 with unlimited non-VAT plus £9 per VAT client, or £100 for the whole-practice plan.
Flat fees carry three risks. Your clients may already be on Xero or QuickBooks and not want to move. Every client moved is a migration, with opening balances and bank feeds to rebuild. And a single-vendor practice has one point of failure if the vendor changes terms or closes, as Botkeeper did in 2026, which we cover in our Botkeeper alternatives post.
Per-client ledger subscriptions have the opposite profile. They cost more in total but are usually paid by the client, sit in software the client chose, and give you an agent view of many clients.
Which tools fit which kind of practice?
A small practice with mostly sole traders and a few landlords should start from the ledger its clients already use, because that avoids migration and the client usually pays. Xero is the default for many UK practices, and its directory record says every current plan is listed as MTD for Income Tax ready.
A practice that wants one price for everyone should look at a flat-fee ledger such as Clear Books, accepting the migration cost. A practice with many VAT-registered clients should model the £9 per client rate against the £100 whole-practice plan.
Practices on Sage should look at Sage Copilot, which our directory record says includes an MTD for Income Tax agent for firms using Sage for Accountants, where the firm chooses which steps to automate. Sage's price for that agent was not confirmed from a primary page, so check it.
Practices that produce returns and accounts should price TaxCalc separately. Its editor score is 4.6 out of 5, and its published price list sells tax return production, accounts production and practice management in client bands, without a separate MTD line that we could find.
For capture, Dext costs from £2.50 per client per month on the Solo practice plan, with a five-client minimum. It adds to the ledger cost rather than replacing it. See our guide to MTD software and what it must do and the year-end return check for the tax return side.
What should you charge clients on top of the software?
Software is a small part of the price a client sees. Sage's July 2026 pricing guide for MTD suggests three example retainer tiers: £35 to £50 a month for compliance only, £65 to £85 for compliance with light support, and £100 to £150 for proactive advisory, each plus VAT and plus software, with the final tax return priced separately. These are Sage's own examples, not market data.
Set against that, a £10 to £20 ledger is 10% to 40% of the lowest retainer. The bigger cost for the practice is staff time on four quarterly updates per client per year, plus the year-end return.
The timetable decides when this lands on your desk. Qualifying income over £30,000 in the 2025 to 2026 tax year means a client starts on 6 April 2027, and over £20,000 in 2026 to 2027 means 6 April 2028, according to GOV.UK. Our posts on the threshold rules and the April 2027 readiness plan cover how to sort clients into groups.
Pro Tip: Count clients by start date before you buy anything. Buying for all 300 clients now, when only 40 start in April 2027, pays for software that nobody uses for a year.
Why does independent evidence matter when choosing MTD for Income Tax software?
Vendor pricing pages describe the vendor's best case, with introductory discounts, add-ons and plan limits shown differently on each site. An independent editor score and a last-verified date tell you how recently someone checked the listing against the vendor's site and what the gaps were.
The AI Ledger's scores are set from the published evidence, and a listing's last verified date shows when the vendor's pages were last read. Browse the full directory and compare listings side by side rather than relying on any single vendor's claims.
Realistic expectations: software is the cheap part
Budget for staff time, client chasing and onboarding before software, because a £10 ledger does not file itself. Run one live quarter with a small group before you commit the whole client list.
Expect friction in the first quarter: clients who send records late, authorisation steps with HMRC, and software that handles landlords with joint ownership or mixed income awkwardly. None of this is a reason to delay, since the first-year quarterly deadlines carry no penalty, but it is a reason to start with a pilot.
Find your next MTD for Income Tax software tool through The AI Ledger
Start with the tax prep category for compliance and filing tools, then use the finder to filter by practice size and ledger. Use compare to put two listings next to each other, and check the last verified date on each before you shortlist.
Frequently asked questions
What is the cheapest MTD for Income Tax software for accountants?
On published prices, Clear Books is cheapest at scale: it says £50 a month covers unlimited non-VAT clients. Per-client ledgers cost £10 to £20 a month per sole trader, so 150 clients cost £1,500 to £3,000 a month if the practice pays. Check each vendor's current pricing and promotions before deciding.
Can I use free software for MTD for Income Tax?
Some products have free tiers or free access, such as FreeAgent for clients banking with NatWest, Royal Bank of Scotland, Ulster Bank or Mettle, and HelloBooks' free plan limited to 200 transactions a year. Free plans have limits, so confirm that quarterly updates and the final return are included before relying on them.
Do I need separate software for each client?
Not necessarily. HMRC says you can use more than one product but only one for each separate submission, and agents can work across many clients. Each client's records still need to live in compatible software, so a client usually needs a ledger or a bridging tool connected to a spreadsheet.
When do the penalties for MTD for Income Tax start?
Nothing is charged for a late quarterly update in the 2026 to 2027 tax year. For later years, each missed quarterly update or return deadline earns a penalty point, and reaching 4 points brings a £200 penalty, plus a £200 penalty for each further missed deadline.
How many clients will need MTD software in April 2027?
Clients whose qualifying income in 2025 to 2026 was over £30,000 start on 6 April 2027. HMRC does not publish a count in the guidance we read, so work it out from your own client list. HMRC defines qualifying income as total self-employment and property income before expenses, so turnover decides who is in, not profit.
Sources
- GOV.UK: Choose the right software for Making Tax Digital for Income Tax
- GOV.UK: Find out if and when you need to use Making Tax Digital for Income Tax
- GOV.UK: Work out your qualifying income for Making Tax Digital for Income Tax
- GOV.UK: Penalties for Making Tax Digital for Income Tax
- Xero: Pricing plans
- FreeAgent: Pricing
- Clear Books: MTD for accountants and bookkeepers
- Sage: Pricing for MTD, how to charge more and prove it is worth it
- Startups.co.uk: How much does QuickBooks cost?
- TaxCalc: Price list
Recommended
Keep reading
- MTD Income Tax Threshold Explained: £50k, £30k and £20kThe three MTD for Income Tax thresholds, the tax year each one tests, and what counts as qualifying income, with worked examples from HMRC guidance.
- MTD Software Year End Check: Can Your Clients File Their Return?A third of HMRC-listed MTD products for sole traders cannot yet file the year end tax return. Here is how UK practices should check client software, plan a fallback and work to the 2028 deadline.
- MTD £30,000 Threshold: UK Practice Readiness Plan for April 2027HMRC says around 1,077,000 more sole traders and landlords join MTD for Income Tax in April 2027. Here is how UK practices can scope clients, pick software routes and avoid a February rush.
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