Best practice management software for UK accountancy firms
Karbon, TaxDome, IRIS, GoProposal and Dext compared on what they actually do, where each one disappoints, and which size of practice each suits.
In short
- Start with your bottleneck, not a feature comparison. Most evaluations fail because they begin with the wrong question.
- Karbon leads UK awareness at 2,900 searches a month; GoProposal is unusually high for a single-purpose pricing tool at 1,900.
- TaxDome is the strongest client portal and the easiest to brand onto your own domain.
- IRIS remains the safe answer for high compliance volume, and the most opaque on price.
- If staff are still keying purchase invoices, Dext has the fastest payback of anything on this list.
On this page
What does practice management software actually do?
It runs the jobs, not the numbers. Your ledger handles the accounting; practice management handles everything around it: who owes what work, which client has not sent their records, where the engagement letter got to, which return is at risk of missing a deadline, and who on your team is drowning.
Most UK practices arrive at this decision after the spreadsheet stops coping, usually somewhere between three and eight staff. The symptoms are consistent: work getting missed in January, partners chasing status by email, and nobody able to say with confidence how many self assessments are outstanding.
What the UK market looks like
Search demand is a reasonable proxy for what UK firms are actually evaluating. These are the September 2026 figures.
| Tool | Category | UK searches/mo | Difficulty |
|---|---|---|---|
| Karbon | Workflow and email management | 2,900 | 18 |
| GoProposal | Pricing and engagement | 1,900 | 5 |
| TaxDome | All-in-one with client portal | 480 | 14 |
| IRIS | UK tax and accounts production | 390 | 29 |
| Dext | Document and receipt capture | 49,500 | 22 |
| FreeAgent | Ledger, strong with contractors | 90,500 | 14 |
DataforSEO, United Kingdom, September 2026. Volume reflects market awareness, not quality.
Two things stand out. Dext and FreeAgent dwarf everything else because they are used daily by clients as well as staff, so the search volume is not really about practice management at all. Among the practice tools proper, Karbon leads UK awareness and GoProposal is remarkably high for a single-purpose pricing tool, which tells you how badly the profession wanted that problem solved.
Karbon
Best for: firms of five and up where the problem is work not moving, and email is where things get lost.
Karbon's distinctive feature is that it pulls email into the workflow. A client reply lands against the job rather than in one person's inbox, which is the single biggest cause of work stalling in a growing practice. Work templates, capacity views and time budgeting are strong.
Where it disappoints: it is not a client portal in the way TaxDome is, and the document management is adequate rather than excellent. It is also priced per user in a way that gets expensive quickly for a firm with a lot of part-time staff.
TaxDome
Best for: smaller firms who want one system, and who care most about the client-facing experience.
TaxDome bundles workflow, document management, e-signatures, invoicing and a genuinely good client portal into a single subscription. The portal is white-labelled and can run on your own subdomain with your branding, which is why it comes up so often when we build practice websites.
Where it disappoints: being all-in-one means each component is good rather than best-in-class, and firms that already love their existing invoicing or proposal tool end up paying for overlap. The learning curve for staff is steeper than the marketing suggests.
IRIS
Best for: established UK firms who need accounts production and tax filing in the same house as the practice management.
IRIS is the incumbent for a reason: it does UK statutory accounts and tax properly, and IRIS OpenSpace is a familiar client portal that many of your clients will already have used with a previous accountant. If your compliance volume is high, this is the safe answer.
Where it disappoints: it feels its age next to Karbon and TaxDome, pricing is opaque compared with the newer entrants, and the modular structure means the quote often lands higher than expected once everything you need is included.
GoProposal and Ignition
Best for: any firm that undercharges, which is most of them.
These are pricing and engagement tools rather than practice management. You build a pricing model once, then scope a client against it and produce a proposal and engagement letter in minutes rather than days. The reason we mention them on a website is that both integrate directly into a quote flow, so a prospect can price and sign without a meeting.
Where it disappoints: the setup is real work. You have to decide what you actually charge for and stick to it, which is the hard part these tools cannot do for you.
Dext
Best for: almost everyone, and the oldest proven AI use in practice.
Receipt and document capture with extraction that genuinely works. At 49,500 UK searches a month it is the most widely known tool on this list, largely because clients use it directly. If you are still keying purchase invoices manually, this is the change with the fastest payback of anything here.
How to choose without wasting three months
Most software evaluations fail because they start with feature comparison. Start with the bottleneck instead.
- Work gets lost in email: Karbon.
- Clients complain the portal is confusing, or you have no portal: TaxDome.
- Compliance volume is the business and accounts production matters most: IRIS.
- You know you undercharge and proposals take days: GoProposal or Ignition, before anything else.
- Staff are keying in invoices: Dext, this month.
The test that saves you money. Ask what the tool removes from your week, in hours, and who in the practice will own it. If nobody can answer both, the licence will go unused by March. Practice management software fails on adoption far more often than on features.
What this has to do with your website
Whichever you choose, the client-facing half of it should live on your own domain rather than on a vendor URL nobody recognises. TaxDome, Karbon and IRIS OpenSpace all support branding and a custom subdomain, and TaxDome publishes instructions specifically for adding the login link to a firm's website.
In practice that means a prominent Client Login in your header, a short page explaining which portal clients are entering and what to do if they are stuck, and the portal itself at something like portal.yourfirm.co.uk. It is a small thing that removes a surprising number of support emails, and most practices never do it.
What it does not mean is syncing your ledger to a public website or displaying client balances. Nobody should be doing that, and anyone offering it deserves a follow-up question.
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