How much does a SaaS cost to build ?

If you are thinking about building a SaaS (software as a service) business, one of the first questions that comes to mind is: how much will it cost? The truth is, there is no single number. It depends on a few key factors. The biggest of them all is time.

Time is the biggest cost driver

• The longer it takes to build, the more you will pay in development, design, testing.
• If you want your SaaS built quickly. Because you want to beat competitors or launch early, you’ll often pay more. Faster work usually means more staff, possibly more experienced people, or overtime.

So whether you're going for slow and steady or fast launch, time has a large effect on cost.

What you actually get matters

Another big piece is exactly what is delivered:

• A simple web app (just the interface people use in a browser) will cost far less than a package that includes mobile apps, server side features, analytics, dashboards, billing integrations, etc.
• Extras like a landing page (to attract users), market-fit analysis (to test whether people want the idea), feedback & improvement suggestions all add cost, but make a big difference in how well your product launches.

Real world price ranges (UK and globally)

Here are some data points to give you an idea (in UK or global markets) of how much SaaS builds cost, depending on complexity or “tier”:

Tier / TypeTime estimateTypical cost in UK / globally

MVP (lean / simple) — just core features, web only, minimal integrations

8-12 weeks

£20,000 ‒ £40,000 UK for lean SaaS builds. United Kingdom

Mid-range SaaS — dashboards, billing, some integrations, more polish

3-6 months

£50,000 ‒ £80,000 UK. United Kingdom

Enterprise / high complexity — multi-user roles, mobile apps, compliance, analytics, scaling, etc.

6-12+ months

£90,000 ‒ £200,000+ UK. United Kingdom

Globally, basic SaaS MVPs often cost USD $25,000 ‒ $150,000; large or very feature rich builds can go well beyond $300,000. Bacancy+1

KerenLabs example: our bundle

To make this more concrete: at KerenLabs, our standard bundle costs £10,000.

In return for that bundle you get:

• A landing page to help attract users
• Market fit analysis to check if the idea is strong
• The SaaS product itself, built carefully
• Detailed feedback on how to improve it and where the idea might have more potential

So you are paying for more than just the bare product. That helps you launch more intelligently.

Why bundles often make sense

Since so much of the cost depends on what is delivered (not just time), bundles provide value:

• They combine things like landing page, analysis, product build, feedback.
• You might spend more upfront than building just the core web app, but you are less likely to waste money later on things you overlooked.
• Faster, smarter launches often save money in the long run (you avoid big reworks, mis-launched products, or products nobody wants).

Bottom line: what to expect

So, putting it all together:

• If you want something basic and you are okay with minimal features, expect £20,000-£40,000 in the UK.
• If you want moderate polish, dashboards, billing etc, think £50,000-£80,000.
• If you want a full product with many features (mobile apps, scaling, analytics etc), the cost climbs above £90,000, often well into six figures.

Compare those estimates with KerenLabs’s bundle of £10,000: that is positioned for a lean but thoughtful start with extras like market analysis and feedback.

At the end of the day, the real question is not just how much but what you want, how fast you want it, how much risk you can tolerate, and what quality or extras matter to you.