What a booking system costs
For most small businesses the right answer costs under £30 a month and takes an afternoon to set up. For some it is genuinely a custom build. The difference is not the size of the business — it is a short list of requirements.
Off the shelf versus custom, UK 2026
| Option | Typical cost | Right when |
|---|---|---|
| Free tier of a booking tool | £0 | Solo, simple appointments, low volume |
| Paid booking tool | £6 – £75 a month | Most salons, clinics, trades and studios |
| Sector platform (e.g. restaurants) | £135 – £300 a month | You need sector features such as table management |
| Custom booking system, simple | £2,000 – £5,000 | One resource type, but your own rules or branding |
| Custom booking portal | £5,000 – £15,000 + | Payments, staff roles, integrations, unusual rules |
Ranges from UK provider pricing pages and agency guides, 2026.
Start with the cheap option — then look for these signs
A monthly booking tool is almost always the right first step. It is proven, it is maintained by someone else, and you can leave. The case for a custom build only exists when the tool starts costing you more than it saves. The signs are specific:
- Your rules do not fit. Bookings that depend on combinations — this room with that staff member, this equipment, this lead time — that no tool models.
- You are paying per location or per staff member and the monthly bill has quietly crossed the cost of owning it.
- Bookings have to flow into other systems you run — stock, invoicing, a CRM — and you are re-typing them.
- The booking is the product. If you sell access to something bookable, the booking experience is your brand, and renting it limits you.
Questions people ask next
Can I add booking to my existing website?
Usually, yes. Most booking tools give you a widget or a link that sits inside an existing site. That is the fastest and cheapest route, and a good way to learn what you actually need before building anything.
What does a custom booking system cost to run?
Hosting and maintenance, typically a few hundred pounds a year for a simple system, rising with complexity. Compare that honestly against the monthly fee you would stop paying.
How do I know which option is cheaper over three years?
Total the monthly tool cost for thirty-six months and set it beside the build cost plus three years of maintenance. If the tool is cheaper and does the job, keep the tool.
Read next
What software costs in the UK
The ranges, what moves a project between them, and the costs nobody quotes.
What an online shop costs
Shopify, custom, and the point where the answer changes.
Fixed price or time and materials?
Which contract fits which project, and who carries the risk.
Not sure whether you have outgrown the tool?
Describe how your bookings actually work and Moksy will lay out what a system for it needs to do, what it would cost to build, and what it would cost to run — so you can compare it honestly with the subscription.