Buy off-the-shelf software when your process is standard. Build a custom client portal or internal tool when your process is the thing that makes your business different, or when you are bending several tools together to get it done. Most UK small businesses should start with off-the-shelf and only commission custom software when it stops fitting.
This guide helps you tell which side of that line you are on.
The honest case for off-the-shelf
Off-the-shelf products such as Xero, HubSpot, Shopify or a booking platform have thousands of customers funding their development. They are cheaper to start, quicker to launch and maintained by someone else. If a product does 90% of what you need, use it. Building custom software to replicate something that already exists is usually money wasted.
Off-the-shelf is the right answer when:
- your process is common in your industry
- you need to be running within days, not weeks
- you have little appetite for managing software
- the monthly subscription is small compared with the cost of building
When custom starts to win
Custom software earns its cost in a handful of recognisable situations.
1. You are stitching together four tools and a spreadsheet. If staff copy data between systems, re-key information or keep a “master” spreadsheet because nothing quite fits, you are paying for the gap in wasted hours. A single purpose-built tool can remove it.
2. Your customers need a self-service view of their own information. Order status, documents, invoices, case progress, bookings: a branded portal where clients log in and see their own data cuts inbound calls and emails. Generic tools can do some of this, but rarely in your brand or with your exact workflow.
3. Your process is your advantage. If how you quote, schedule or deliver is what customers pick you for, forcing it into a generic tool’s shape flattens it.
4. Per-user subscription costs are climbing. Many products charge per seat. At twenty or thirty users, a one-off build with a modest support plan can cost less over three years.
5. You have data or compliance needs the product cannot meet. UK-resident hosting, specific audit trails or strict access rules can rule out some products.
A quick comparison
| Off-the-shelf | Custom portal or tool | |
|---|---|---|
| Upfront cost | Low | Typically £4,000 to £15,000 |
| Time to start | Days | Weeks |
| Fit to your process | Adapt your process | Built to your process |
| Ongoing cost | Subscription, often per user | Hosting plus support, from £199 a month |
| Ownership | You rent it | You own the source code |
| Risk | Vendor changes or price rises | Needs maintenance |
The middle path
It is not either-or. Many good solutions connect off-the-shelf products with a thin custom layer: a portal that pulls from your accounting system, or a dashboard that combines data from three tools. This keeps the reliable parts bought and the distinctive parts built.
Questions to ask yourself
- How many hours a week does the current workaround cost?
- Would a client-facing portal reduce calls or speed up payment?
- Do I already know the workflow well enough to describe it?
- Am I prepared to pay for maintenance, not just the build?
If you can answer the first three with confidence, you are probably ready for custom. If you are unsure of the workflow, run it on an off-the-shelf tool first. It will teach you what you actually need.
What custom costs, and what it needs afterwards
A bespoke portal or internal tool typically costs between £4,000 and £15,000 at a fixed price. See how much a custom web app costs for the factors behind that range. Once it is live it needs hosting, backups and updates, which is what our Webapp Care plans cover, from £199 a month on a rolling basis.
Talk it through
If you are weighing this up, our web application development page shows what we build, and a project enquiry gets you an honest view of whether custom is justified. If off-the-shelf is the better answer, we will say so.