The short answer
Taking bookings on your website costs anywhere from £0 (a scheduler embed you set up yourself) to £12,500+ (a custom booking platform), and the right level depends on how complicated your availability really is. Most businesses need far less than they fear. Some need more than they've been sold. The four levels below cover practically every case.
The four levels, priced
| Level | What it is | Fixed price |
|---|---|---|
| 1 · Scheduler embed | Calendly-style booking for appointments and calls, embedded to match your site, synced to your calendar. | £450 (~$550) as a Simple integration — or DIY free |
| 2 · Bookings with payment | Deposits or full payment taken through Stripe at the moment of booking, with confirmations and error handling. | £850 (~$1,050) Standard integration |
| 3 · Synced booking flow | Two-way sync between bookings, calendars and your back-office tools — availability always true, no double-booking. | £1,850 (~$2,300) Advanced integration |
| 4 · Custom booking platform | The booking rules ARE the business: fleet or room availability, date-based pricing, deposits, operations behind it. | From £12,500 (~$15,500) as a scoped platform MVP |
Levels 1–3 are our published integration tiers — a booking brand name doesn't change the price. Level 4 is platform work, scoped free and fixed before we start. If you're building a new site anyway, our Build tier already includes one Simple or Standard integration — which can be your booking system.
Tell us how your bookings actually work — we'll point at the level honestly, including level zero if a free tool covers it.
The honest bit: level 1 might be free
If you're one person taking appointments, you may not need a developer at all. Calendly, Cal.com and Microsoft Bookings all have free tiers that embed in an afternoon — we use exactly that pattern for our own consultation bookings. Where paid work earns its keep is everything a generic scheduler can't express: money changing hands, multiple staff or assets, availability rules with exceptions, and booking data that needs to reach your invoicing or operations.
What pushes a business to level 4
We’ve built the level-4 case: Calle Campers, a campervan-hire company taking bookings through its own site. A scheduler can't run a hire fleet — each van has its own availability, pricing varies by season and duration, hires need deposits, and a booking has to trigger real operations. The tell that you're in this territory isn't company size; it's that your availability rules have exceptions, and the exceptions have exceptions. At that point off-the-shelf tools cost you more in workarounds than a scoped build costs to own outright — and you stop paying per-booking commission to somebody else's platform. Our fictional-but-functional Slotwise sample shows the shape of a multi-resource scheduling product if you want to click around one.
Running costs nobody mentions
- SaaS schedulers — free tiers are genuinely free; paid tiers run roughly £10–£15 per user per month, forever, and marketplace booking platforms often take per-booking commission on top.
- Stripe fees — payment processing costs a percentage per transaction whichever route you take; that goes to Stripe, not your developer (our Stripe guide separates the two properly).
- A custom platform — no per-booking commission and no per-user fees, but it's software you own, so someone should keep it monitored and patched; our care plans exist for exactly that.
Questions we hear a lot
Can't I just use Calendly for free?
Often, yes — and we'll tell you so. If you're one person taking appointments, a free scheduler embedded in your site is genuinely the right answer; we use one ourselves for consultations. Paid development starts making sense when bookings involve payments, multiple staff or resources, availability rules a generic tool can't express, or data that needs to flow into your other systems.
What does it cost to take booking payments on my website?
Wiring a payment step into your booking flow is typically our Standard integration at £850 fixed — deposits or full payment collected through Stripe at the moment of booking, with confirmations and error handling. Two-way sync with calendars or your back-office systems is Advanced at £1,850. Stripe's own transaction fees are separate and go to Stripe, not us.
When does a business need a fully custom booking system?
When the booking rules are the business: fleets or rooms with per-item availability, variable pricing by date or duration, staff rotas, deposits and damage waivers, or bookings that must drive invoicing and operations. That's platform territory — from £12,500 fixed for a scoped MVP. We built exactly this for Calle Campers, a campervan-hire company taking real bookings through their site.