Everyone asks the same question first: “How much does a custom platform cost?”
Fair enough. It’s a big decision. You’re not buying software off a shelf. You’re commissioning something built around your exact methodology, your client process, your framework. That’s a different category of spend, and it deserves a straight answer.
So here it is. We’re going to break down every cost involved in building, running, and maintaining a bespoke coaching SaaS. No vague ranges. No “it depends” without context. Just the actual numbers, sourced where possible, and explained in plain English.
If you haven’t read it yet, our guide to productising your coaching framework covers what you’re building. This post covers what it costs.
The build: what you’re actually paying for
A bespoke coaching platform isn’t a website with a login page. It’s a full product: authentication, payments, content delivery, client tracking, automated check-ins, AI-driven coaching support, dashboards, admin tools, and integrations with whatever else your business runs on.
The build cost for a coaching platform like this typically falls between £15,000 and £30,000, based on our project experience. That’s for a fully deployed MVP with real users, real payments, and real data flowing through it.
Here’s where that money goes:
Discovery and architecture (5-10% of budget)
Before any code gets written, we need to understand your framework inside out. What does your client path look like? Where do clients stall? What can be automated and what needs to stay live? This phase produces the technical blueprint that everything else is built against.
For a £20,000 project, expect £1,000 to £2,000 here. That’s roughly 2 to 3 days of focused architecture work.
Design and frontend (20-25%)
The client-facing experience: onboarding flows, dashboards, progress views, content delivery screens. This needs to feel like a premium product because your clients are comparing it (consciously or not) to every other app on their phone.
UK freelance developers charge an average of £438 per day, with senior full-stack developers closer to £500 to £600. Design and frontend work on a £20,000 project typically runs to £4,000 to £5,000.
Backend, AI, and integrations (40-50%)
This is the engine. User management, programme logic, content sequencing, automated check-ins, AI coaching agents trained on your methodology, payment processing via Stripe (1.5% + 20p per UK card transaction), calendar integrations, email notifications, and admin tools.
AI integration adds complexity. If you want an AI agent that actually knows your framework and can coach clients using your language, that requires prompt engineering, testing, and fine-tuning. It’s the most valuable part of the platform and the most labour-intensive to get right.
On a £20,000 project, this chunk runs to £8,000 to £10,000.
Testing, deployment, and handover (10-15%)
Quality assurance, staging environments, production deployment, DNS and SSL, monitoring setup, and documentation. Plus a post-launch support window (we include 2 weeks) to catch anything that only surfaces once real clients start using the platform.
That’s £2,000 to £3,000 on a typical project.
How this compares to the wider market
Our pricing sits at the focused, specialist end of the market. For context:
- General SaaS development costs range from $15,000 to $250,000+ globally, depending on scope and team location
- UK-based SaaS builds average around £85,000 for a mid-complexity platform (think HR software with payroll)
- Agencies charging by the day at £438 average UK developer day rate for a 3-month build would bill £28,000 to £40,000+ in development time alone
We’re able to work at £15,000 to £30,000 because we’ve built this type of platform before. The architecture patterns, the AI integration approach, the accountability systems: we’re not starting from scratch each time. You’re paying for a build that’s informed by previous coaching platform projects, not a team learning your industry on your budget.
The running costs: what you pay after launch
The build is a one-off. The running costs are ongoing. Here’s what to expect.
Hosting and infrastructure: £50 to £200/month
A coaching platform serving tens to low hundreds of active clients doesn’t need enterprise-grade infrastructure. AWS costs for early-stage SaaS platforms range from $100 to $5,000+ per month, with most small platforms sitting well under $500. For a coaching platform with a few hundred users, expect £50 to £200 per month depending on usage patterns and whether you’re running AI inference locally or via API.
AI inference costs: £20 to £100/month
If your platform uses AI agents (for coaching delivery, check-ins, or client support), there’s a per-usage cost for the language model. At current API pricing for models like GPT-4o or Claude, a platform handling 50 to 100 active clients with daily AI interactions typically runs £20 to £100 per month in inference costs. This scales with usage, not with a fixed subscription.
Payment processing: 1.5% + 20p per transaction
Stripe UK charges 1.5% + 20p for standard UK card payments, 2.5% + 20p for EEA cards, and 3.25% + 20p for international cards. There’s no monthly fee. You pay per transaction.
On £10,000 per month in client payments, that’s roughly £170 in processing fees. Compare that to Kajabi’s 2.9% + $0.30 per transaction plus their recurring transaction surcharges, and the savings add up quickly.
Domain, email, and monitoring: £10 to £30/month
SSL certificates (free via Let’s Encrypt or Cloudflare), domain renewal (£10 to £15/year), transactional email via a service like Postmark or Resend (pennies per email at low volumes), and basic uptime monitoring.
Maintenance and updates: £0 to £500/month
A well-built platform doesn’t need constant tinkering. In the first few months after launch, expect some iteration as you learn how clients actually use the system. After that, ongoing maintenance is minimal unless you’re adding new features.
Budget £0 to £500 per month depending on whether you want a retainer for ad-hoc changes or prefer to commission feature work as needed.
Total running costs
For a coaching platform with 50 to 100 active clients:
| Cost | Monthly estimate |
|---|---|
| Hosting and infrastructure | £50 to £200 |
| AI inference | £20 to £100 |
| Payment processing (on £10k revenue) | ~£170 |
| Domain, email, monitoring | £10 to £30 |
| Maintenance (optional retainer) | £0 to £500 |
| Total | £250 to £1,000 |
The lower end is realistic for a platform that’s built well and running smoothly. The higher end includes an active maintenance retainer and higher AI usage.
The ROI: when does it pay for itself?
This is the question that actually matters. A £20,000 build sounds like a lot. But compared to what?
Compared to your current tool costs
If you’re running the typical coaching frankenstack (Kajabi, Zapier, Calendly, Slack, Notion, Stripe, a course platform), you’re already spending several hundred pounds a month in subscriptions. Our Kajabi comparison breaks this down in detail, but the short version: Kajabi Pro alone costs ~£295/month ($399 USD on annual billing). Add the other tools and you’re easily at £400 to £600 per month. Not sure of your exact number? Audit your stack for free.
A custom platform replaces most of those tools. Even at £200/month in running costs, you’re saving £200 to £400 per month versus the frankenstack. That’s £2,400 to £4,800 per year back in your pocket.
Compared to your time
This is the bigger win. If you’re spending 6+ hours per week on manual admin that a platform could handle (and research from Klipboard suggests service professionals spend at least that), those hours have a value.
A coach charging £250 per hour (the average for UK executive coaches) who reclaims 6 hours per week is recovering £1,500 per week in billable capacity. That’s £6,000 per month. Even at £100 per hour, it’s £2,400 per month in recovered capacity.
The platform doesn’t automatically put that money in your bank account. But it gives you the hours back. What you do with them (take on more clients, create new offerings, take a day off) is up to you.
Compared to hiring
The alternative to automation is people. A part-time virtual assistant costs £1,000 to £2,000 per month. A full-time ops person costs £25,000 to £35,000 per year. And they still can’t do what a well-built platform does: deliver your methodology consistently, at any hour, to every client simultaneously.
A £20,000 platform build is roughly equivalent to 10 to 20 months of VA costs. After that, the platform keeps running at a fraction of the ongoing cost.
The breakeven
Here’s a rough timeline, using conservative numbers:
- Build cost: £20,000
- Monthly running cost: £200
- Monthly savings vs frankenstack: £300
- Monthly recovered capacity: £2,400 (6 hours/week at £100/hr)
- Net monthly gain: £2,500
At that rate, the platform pays for itself in about 8 months. With higher hourly rates or more recovered time, it’s faster. With lower rates, it takes a bit longer. But the direction is consistent: a custom platform is a depreciating expense that turns into a recurring saving.
These numbers are illustrative. Your actual breakeven depends on your pricing, client volume, and how much of your current workflow can realistically move into the platform.
What you own vs what you rent
There’s one more angle that most cost comparisons miss: ownership.
When you pay Kajabi £295 per month, you’re renting. Your content, your client data, your payment history, your course structure: it all lives on their servers, under their terms. If they raise prices (which they did in September 2025), you pay more. If they discontinue a feature, you lose it. If you leave, you start from scratch.
When you commission a custom platform, you own everything. The code, the data, the infrastructure, the client relationships. You can switch hosting providers, hire a different developer to maintain it, or sell the platform as part of your business. It’s an asset on your balance sheet, not a line item on someone else’s.
For coaches thinking about the long game (building a business that could run without them, or be sold one day), that difference matters.
When the numbers don’t make sense
To be fair, a custom platform isn’t always the right call. The maths doesn’t work if:
- You have fewer than 15 active clients. The manual work is still manageable, and the build cost takes too long to recoup.
- You’re still below the ICF global average (~£3,500/month). Focus on growing revenue first. The platform can come later.
- Your methodology isn’t proven yet. Building software around a framework that’s still changing is expensive and frustrating. Get the framework right, then encode it.
- You’re not hitting a delivery ceiling. If your current setup works and you’re not turning away clients or burning out, there’s no urgency. Keep what works.
Our revenue ceiling breakdown covers how to tell if you’ve actually hit the wall or if you’ve just got room to improve your current setup first.
What happens after the build
A common worry: “What if I need changes after launch?”
You will. Every platform needs iteration once real clients start using it. That’s normal and expected. The question is how much, and how it’s structured.
Our builds include a 2-week post-launch support window. After that, most clients either:
- Pay as they go. Commission specific features or fixes when needed. No retainer, no commitment. You only pay when you want something built.
- Set up a light retainer. A few hours per month for ongoing tweaks, performance monitoring, and small feature additions. Typically £200 to £500 per month.
- Do nothing. The platform runs. If it’s built well (and tested properly), it doesn’t need constant attention. Some of our platforms run for months without a single support ticket.
The goal is a platform that works without you and without us. That’s what “bespoke” should mean.
The real cost of not building
We’ve covered what a custom platform costs. But there’s a cost to staying on your current setup too.
Every month you spend on tools that don’t quite fit, every hour you lose to manual admin, every client who drops off because your onboarding was clunky, every price increase from a SaaS vendor who knows you’re locked in: that’s a cost. It just doesn’t show up on a single invoice.
The question isn’t “can I afford a custom platform?” It’s “can I afford another year of the status quo?”
If the answer is no, book a free architecture audit. We’ll map your current costs, identify where a platform saves you money and time, and give you a realistic scope and budget before you commit to anything.
Related reads
- How to productise your coaching framework into a scalable SaaS. The full guide to what a productised platform looks like and how to think about the shift from manual delivery to platform delivery.
- How to turn a 1-on-1 coaching programme into a scalable digital product. Do this before you commission the build. The 5-step plan for mapping your programme, separating human-only from software-handled work, and picking the right product shape for your price point.
- Custom coaching platform vs Kajabi: what growing coaches actually need. A detailed comparison of Kajabi’s limitations versus what a purpose-built platform gives you.
- Why your coaching business has a revenue ceiling (and how to break it). The problem-side view: why your revenue is capped by your calendar and what actually breaks through.
- Platform readiness quiz. Eleven-question diagnostic covering framework proof, demand, operations, and business model fit. Scores whether you’re ready to invest in a build, or whether you need more reps first.
- AI for coaching businesses: the complete guide. The AI side of the cost conversation. What AI inference actually costs at coaching-business scale, and what a realistic running budget looks like.
Want a realistic cost estimate for your specific coaching business? Book a free architecture audit. No commitment, no sales pitch. Just an honest assessment of what it would take to build a platform around your framework.