Custom CRM vs Off-the-Shelf: The UK Cost Comparison
A custom CRM in the UK costs from around £8,000 to build. An off-the-shelf CRM costs roughly £15 to £120 per user per month, forever. For a ten-person team on a mid-tier product at £50 a user, that is £6,000 a year — so a £20,000 custom build reaches cost parity somewhere between years three and four.
Prabhu SolutionsPublished 6 September 2026Last reviewed 15 September 20267 min read
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What is the straight arithmetic?
Over five years a ten-user off-the-shelf CRM at £50 a seat comes to roughly £30,000, against roughly £20,000 to build and £10,000 to run a custom one. The figures land closer together than most people expect, which is why cost parity is the wrong place to make this decision — it should turn on fit and risk. These are UK market figures, and reflect the scope of a custom CRM development project.
| Factor | Off-the-shelf | Custom |
|---|---|---|
| Upfront | £0 – £3,000 setup | £8,000 – £40,000+ |
| Ongoing | £15 – £120 per user per month | Hosting £30–£200 a month plus support |
| Time to live | Days to weeks | 8 weeks to 6 months |
| 10 users, 5 years | Around £30,000 at £50 a user | Around £20,000 build plus around £10,000 running |
| Fit | Good if your process is standard | Exact, by definition |
| Changes | Whatever the vendor allows | Whatever you pay for |
When should you buy off the shelf?
Buy when your sales process is fairly standard, when you need it live next month, when your team is small and the process is still changing, when you need depth a mature product already has, or when your budget is under about £8,000.
- Your sales process is fairly standard. Leads in, qualify, quote, follow up, close. HubSpot, Zoho and Pipedrive do this well and you will not build better for the price.
- You need it next month.
- Your team is small and your process is still changing. Building software around an unsettled process is expensive learning.
- You need depth in one specific area a mature product already has — sophisticated marketing automation, or a large app marketplace.
- Your budget is under about £8,000. Below that a custom build will be too thin to be worth having, and what bespoke software buys at each band shows why.
When should you build a custom CRM?
Build when your process genuinely does not fit and you have already tried bending a product to it, when your team has quietly stopped using the CRM you bought, when per-seat costs have grown significant, when the value sits in integration, when the data is a competitive asset, or when compliance rules the general options out.
- Your process genuinely does not fit and you have already tried bending a product to it.
- Your team has stopped using the CRM you bought, or maintains a parallel spreadsheet. This is the clearest signal there is, and it means you are paying licence fees for shelfware.
- Per-seat costs have become significant across a growing team.
- The value is in integration with the systems that already run your business — your production system, your accounting package, your website, your stock.
- The data is a competitive asset and you want it in your own database, portable.
- Compliance or data-residency requirements rule out the general options.
What costs do both sides forget?
On the off-the-shelf side, implementation and configuration — often £2,000 to £10,000 for anything serious — plus data migration, training, per-seat costs as you grow, paid add-ons for things you assumed were included, and the cost of changing your process to fit the software, which is real even though it never appears on an invoice.
On the custom side, hosting, support and maintenance, the iteration that follows launch, and the risk that your developer becomes unavailable. That last one is mitigated by owning the code and using standard technologies — ask about both before you sign. A quote that does not separate the build from the running costs is not a complete quote — ask for both before you compare anything.
The point
On the custom side, hosting, support and maintenance, the iteration that follows launch, and the risk that your developer becomes unavailable.
Is there a middle path?
Yes, and it is the one most people miss: keep the off-the-shelf CRM for the standard functions and build bespoke only for the part that is genuinely distinctive — the quoting engine, the production integration, the pricing logic.
Connect the two with an integration, usually delivered as a web application your team logs into. Frequently the cheapest good answer, and it is what we recommend more often than a full custom build.
The point
Connect the two with an integration, usually delivered as a web application your team logs into.
What do you keep in a spreadsheet instead of the CRM?
Ask your sales team that one question. If the answer is “nothing”, your CRM fits and you should not be reading this. If the answer is a list, that list is your specification — and it is also the measure of what your current licence fee is buying you.
Questions people ask about this
How much does a custom CRM cost in the UK?
From £8,000 for a focused system to £40,000 and beyond for a multi-team platform. Most land between £15,000 and £40,000. UK agencies quoting enterprise CRM work commonly publish £30,000 to £150,000, largely reflecting London rates and larger scope.
Is Salesforce or HubSpot cheaper than building?
Cheaper to start, not necessarily cheaper over five years, and the comparison misses the point. If the product fits your process, buy it. If your team is working around it, the licence fee is buying you a system nobody uses.
How long does a custom CRM take to build?
Eight to twelve weeks for a focused system, four to six months for a full business CRM. Data migration and your team's availability for testing move the date more than development does.
Can I start with off-the-shelf and move later?
Yes, and it is often the sensible sequence. Use a product for a year, learn what genuinely does not fit, and let that be the specification. Just make sure you can export your data — check that before you commit, not after.
What happens to my data if I build custom and the developer disappears?
It stays in your database, on your hosting, in your account. That is precisely why code ownership and standard technologies matter. Ask both questions before signing.
The work behind this article
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