The Real Cost of Staying on Dext: A 3-Year Practice Calculation
Tanvir Alam•Aug 16, 2026•7 min read•Comparisons
When you model Dext's per-client pricing across three years of typical practice growth, the total cost is significantly higher than most practice owners realise, and the gap against flat-rate alternatives widens every year.
What Does Dext Actually Cost Over 3 Years?
Most UK practice owners know roughly what they pay for Dext each month. They see the direct debit, they know the ballpark. What very few have ever done is model the cost of staying on Dext over three years, accounting for the one thing that makes Dext's pricing model work differently from almost every other SaaS tool in a practice's stack: the bill goes up every time you add a client.
This post runs those numbers. Three firm sizes, three growth trajectories, three years. All figures are ex-VAT and based on Dext's published UK practice pricing as of June 2026.
How Dext Pricing Actually Works
Dext does not charge a flat monthly fee. It charges per client, which means your monthly bill is tied directly to how many clients sit on your account at any given time.
As of June 2026, Dext's published UK practice plan pricing is:
50 clients: £391/month
150 clients: £894.15/month
300 clients: £1,541.10/month
Those figures reflect the number of clients currently added to your Dext subscription. Add clients, the bill increases. It is not a dramatic jump on any given month, which is precisely what makes this model difficult to track without sitting down to do the maths.
In August 2023, Dext eliminated unlimited flat-fee practice plans in the UK and moved entirely to per-client pricing. Practices that had been on flat fees reported cost increases of 200 to 400 per cent at renewal, as documented on AccountingWEB at the time. The per-client model has been in place ever since.
The 3-Year Calculation: Three Scenarios
Below are three worked scenarios. Each starts with a practice at 50 clients in Year 1 and models cost across three years based on different growth trajectories. Dext figures are based on published pricing and assume client count moves the bill proportionally within the per-client model.
For comparison, each scenario includes Receiptflow's flat-tier pricing: £150/month (up to 50 clients), £275/month (up to 150 clients), £500/month (up to 300 clients).
Scenario 1: The Static Practice (50 Clients, No Growth)
A practice that stays flat at 50 clients. No new clients added over the three-year period.
Year
Dext Monthly
Dext Annual
Receiptflow Monthly
Receiptflow Annual
Annual Saving
Winner
Year 1
£391
£4,692
£150
£1,800
£2,892
✅ Receiptflow
Year 2
£391
£4,692
£150
£1,800
£2,892
✅ Receiptflow
Year 3
£391
£4,692
£150
£1,800
£2,892
✅ Receiptflow
3-Year Total
£14,076
£5,400
£8,676
✅ Receiptflow
Even in a static scenario, staying on Dext costs £8,676 more than a flat-rate alternative over three years. For a practice not growing, that is a straightforward overhead with no corresponding benefit from the pricing structure.
Scenario 2: The Growing Practice (50 to 100 Clients Over 3 Years)
A practice that grows modestly: 50 clients in Year 1, 75 clients by Year 2, 100 clients by Year 3. This is not aggressive growth. It is roughly 17 new clients per year, which is realistic for a healthy independent practice.
Dext's per-client pricing at these points:
50 clients: £391/month
75 clients: approximately £587/month (extrapolated at Dext's per-client rate)
100 clients: approximately £782/month (extrapolated at Dext's per-client rate)
Receiptflow's pricing does not change between 50 and 150 clients: £275/month on the Pro plan covers the full range.
Year
Dext Monthly
Dext Annual
Receiptflow Monthly
Receiptflow Annual
Annual Saving
Winner
Year 1
£391
£4,692
£150
£1,800
£2,892
✅ Receiptflow
Year 2
£587
£7,044
£275
£3,300
£3,744
✅ Receiptflow
Year 3
£782
£9,384
£275
£3,300
£6,084
✅ Receiptflow
3-Year Total
£21,120
£8,400
£12,720
✅ Receiptflow
This is where the structural difference becomes material. On Receiptflow, your cost stays flat from Year 2 onwards regardless of how many clients you add within the tier. On Dext, every client adds cost. By Year 3, the annual saving against Receiptflow has grown from £2,892 to over £6,000.
Scenario 3: The Scaling Practice (50 to 150 Clients Over 3 Years)
A practice that scales from 50 clients to 150 clients over three years. Around 33 new clients annually, which puts this in the range of an actively growing firm rather than a lifestyle practice.
Dext pricing at scale:
50 clients: £391/month
100 clients: approximately £782/month
150 clients: £894.15/month
Receiptflow pricing covers this entire range within two tiers: £150/month (up to 50 clients), then £275/month (up to 150 clients).
Year
Dext Monthly
Dext Annual
Receiptflow Monthly
Receiptflow Annual
Annual Saving
Winner
Year 1
£391
£4,692
£150
£1,800
£2,892
✅ Receiptflow
Year 2
£782
£9,384
£275
£3,300
£6,084
✅ Receiptflow
Year 3
£894
£10,728
£275
£3,300
£7,428
✅ Receiptflow
3-Year Total
£24,804
£8,400
£16,404
✅ Receiptflow
A practice that grows from 50 to 150 clients over three years will pay over £24,000 to Dext in that period. The same practice on Receiptflow pays £8,400. The difference is £16,404.
To put that in context: for a firm billing clients an average of £600 per year each, £16,404 represents roughly 27 full client fees absorbed entirely by software costs over three years.
Why This Number Is Rarely Calculated
The reason most practice owners do not know their three-year Dext cost is structural. Per-client billing is designed to increase gradually, in a way that rarely triggers a formal review. A large one-off invoice prompts a conversation. A monthly direct debit that increases by £20 here and £35 there gets absorbed into the operational noise.
The 2023 move to per-client pricing was a significant change for UK practices. Many firms saw their bills increase by several hundred pounds per month almost immediately. But the mechanism that drives ongoing cost increases is quieter: it is simply growth. Every new client your practice wins makes your Dext bill more expensive. There is no point at which growth becomes cost-neutral on Dext's model.
> Try Receiptflow free for 30 days. Flat pricing, no per-client fees, no sales call required.Start your free trial
What the Numbers Do Not Include
The figures above are based purely on subscription costs and do not account for a few additional factors worth noting.
Annual billing discounts. Dext may offer a discount for annual billing. The figures above use monthly billing rates. If you are on annual billing, your actual monthly equivalent may be slightly lower, but the per-client growth mechanism remains the same.
VAT. All figures are ex-VAT. For VAT-registered practices, both Dext and Receiptflow costs will be 20 per cent higher, but the relative saving remains proportionally identical.
Migration effort. Switching software has a one-off cost in time and attention. That is real and worth factoring in. For most practices, a single month of saved Dext fees more than covers the switching time.
Feature trade-offs. Dext includes expense management and mileage tracking features that Receiptflow does not offer. If those features are in active use across your client base, they have genuine value. If they are not, you are paying for them regardless.
The Decision Point
Three years is long enough for the cost of staying on Dext to become a material business decision rather than a line item nobody questions. For a practice at 50 clients with no plans to grow, it is £8,676 over three years. For a practice scaling from 50 to 150 clients, it is over £16,000.
Neither of those figures is abstract. They represent margin, team capacity, or investment in other parts of the practice that do not currently exist because the software budget has absorbed it.
The question is not whether Dext is a good product. It is whether the specific features that justify the per-client price are ones your practice is actually using, at the volume that would make the cost structure rational for your firm size.
If the answer is no, the numbers in this post tell you roughly what that decision is costing, compounded across three years.
> See what your practice would pay on Receiptflow. Pricing starts at £150/month for up to 50 clients, no per-client fees.View pricing
FAQs
Common Questions with Clear Answers
How much does Dext cost UK practices over 3 years?
A static practice at 50 clients pays approximately £14,076 over three years on Dext's current published pricing. A practice growing from 50 to 150 clients pays over £24,000 across the same period, as each new client added increases the monthly bill.
Why does Dext get more expensive as your practice grows?
Dext charges per client rather than a flat monthly fee. Every client added to your account increases your monthly bill. There is no ceiling within a given tier and no point at which growth becomes cost-neutral.
When did Dext switch to per-client pricing in the UK?
Dext eliminated unlimited flat-fee practice plans in the UK in August 2023 and moved entirely to per-client billing. Practices on flat plans at the time saw their costs increase by 200 to 400 per cent at renewal.
What is a cheaper alternative to Dext for UK accountancy practices?
Receiptflow offers flat-tier pricing at £150/month for up to 50 clients, £275/month for up to 150 clients, and £500/month for up to 300 clients, with no per-client fees and no cost increase as you add clients within a tier.
Is it worth switching from Dext to a flat-rate alternative?
For most practices that do not actively use Dext's expense management and mileage tracking features, the per-client pricing premium becomes hard to justify over a three-year window. The savings against a flat-rate alternative grow larger as your client count increases.
