How much does a basic internal tool cost to build in the UK?

A simple internal tool — such as a data entry form connected to a database, or a basic reporting dashboard — typically costs between £5,000 and £15,000 in the UK. The lower end assumes the scope is very tightly defined and requires no complex integrations. Costs rise quickly once you add user authentication, multiple data sources, or role-based permissions.

How much does MVP development cost in the UK in 2025?

A realistic MVP that a real user can interact with and that tests a genuine product hypothesis typically costs £15,000–£40,000 in the UK. Figures below £10,000 usually represent a prototype or clickable mockup rather than working software. The exact cost depends on the number of user journeys, integrations required, and how well-defined the scope is before work begins.

Why are custom software quotes so different from one supplier to the next?

The UK software development market includes freelancers, boutique studios, mid-size agencies, and large consultancies — all with very different cost structures, team compositions, and ways of working. A large agency quote reflects significant overhead: account management, project management, and junior developers working at blended senior rates. A small technical studio or experienced freelancer carries lower overhead and can often deliver comparable work for significantly less. The key is to evaluate track record and ask for itemised quotes, not just headline numbers.

Does the cost include hosting and ongoing maintenance?

Usually not. Most UK development studios quote for the build only. Hosting on cloud infrastructure (AWS, GCP, Azure) typically costs £100–£1,000 per month depending on the application's data volumes and traffic. Ongoing maintenance — bug fixes, security updates, minor feature work — commonly runs at 15–20% of the original build cost per year. Always ask suppliers to clarify what happens after launch before you sign.

Is it cheaper to use a no-code or low-code platform instead of building custom?

For straightforward use cases, no-code tools can be significantly cheaper upfront. But they come with trade-offs: platform dependency, per-user pricing that scales poorly, limitations on custom logic, and data that sits outside your control. Many UK businesses find that no-code tools work well at small scale and become a bottleneck or cost problem as the business grows. Custom development makes more sense when the workflow is complex, the data is sensitive, or the tool is genuinely central to how the business operates.

How Much Does Custom App Development Cost in the UK? (2025)

Custom app development in the UK typically costs anywhere from £5,000 for a tightly scoped internal tool to £150,000+ for a complex, multi-integration platform. The most common range for a well-specified MVP or internal business tool is £15,000–£60,000. Where your project lands depends on three things: the scope of what you are building, who builds it, and how well-defined the requirements are before work begins. This page breaks down what drives cost, what the different price bands actually deliver, and what to watch out for when getting quotes.

Why App Development Costs Vary So Much in the UK

The UK software development market is genuinely fragmented. You can hire a solo freelancer, a boutique technical studio, a mid-size agency, or a large consultancy — and the same project brief will return quotes that differ by a factor of five or more. That spread is not noise; it reflects real differences in how work gets done, who does it, and what overhead you are paying for.

Scope creep is the biggest hidden cost driver. Projects that start without a clear spec routinely end up costing double the original quote. Every ambiguous requirement is a future change request.
Day rates vary significantly by provider type. London-based agencies with large teams carry higher overhead than small studios or independent developers — and that overhead lands in your invoice.
Integrations multiply complexity. Connecting your app to third-party systems (payment processors, CRMs, ERPs, APIs) adds development time that is easy to underestimate in early conversations.
Design requirements are often undercosted. A tool that internal staff use every day needs thoughtful UX. Bolting design on late is expensive and often ineffective.
Ongoing maintenance is rarely included. Most quotes cover the build only. Hosting, updates, bug fixes, and feature iteration are separate costs you need to plan for.

UK Custom App Development Cost by Project Type (2025)

Project Type	Typical UK Price Range	What You Get	Common Pitfalls
Simple internal tool (e.g. data entry form, basic dashboard)	£5,000–£15,000	Single-purpose tool, limited integrations, basic UI	Outgrown quickly if requirements are not pinned down
MVP / proof-of-concept	£15,000–£40,000	Core user journey built and testable, enough to validate with real users	Scope creep if 'just one more feature' thinking sets in early
Mid-complexity internal platform (e.g. ops workflow tool, reporting system)	£30,000–£70,000	Multiple modules, user roles, integrations with existing systems	Underestimating data migration and legacy system complexity
Customer-facing web application	£40,000–£100,000	Polished UI, user authentication, scalable architecture, multiple integrations	Agencies overselling features that delay the core product launch
Complex multi-integration platform	£80,000–£150,000+	Enterprise-grade, multi-tenant, high-security, full API ecosystem	Governance and sign-off processes inflating timelines significantly

Tip

A well-scoped project at £25,000 will almost always deliver more value than a vaguely scoped one at £50,000. Invest time in a proper discovery phase — it is the highest-ROI activity before any code is written.

Day Rates: What UK Developers and Agencies Charge in 2025

Understanding day rates helps you sense-check any quote you receive. If a supplier quotes £15,000 for something that would take a senior developer six weeks of full-time work, the maths does not add up — and that is a red flag worth exploring before you sign anything.

Provider Type	Typical Day Rate (UK, 2025)	Best For	Watch Out For
Freelance junior developer	£200–£350/day	Simple, low-risk tasks with clear specs	Limited capacity for architecture decisions or complex problem-solving
Freelance senior developer	£400–£700/day	Well-scoped projects where you can manage the work yourself	Single point of failure; no cover if they become unavailable
Small technical studio / boutique agency	£600–£900/day blended	End-to-end builds where you want a team without big-agency overhead	Ensure they have genuine delivery track record, not just a polished website
Mid-size UK agency	£800–£1,200/day blended	Projects needing dedicated project management and design resource	Overhead costs; junior developers often do the work at senior rates
Large consultancy	£1,200–£2,500+/day	Enterprise projects with complex compliance or procurement needs	Process-heavy; slow to ship; often not the right fit for SMEs

What Does an MVP Actually Cost in the UK?

MVP development cost in the UK is one of the most searched and most misleading topics in this space. Many founders arrive expecting to build their full product vision for £10,000. A genuine MVP — one that a real user can actually use to validate your core assumption — more realistically costs £15,000–£40,000 when built properly by an experienced team. The key word is 'properly': an MVP built on a brittle foundation will cost you far more to fix or rebuild than it saved in the first place.

Define the single core user journey your MVP must deliver. Everything else is scope creep.
Agree on a fixed discovery phase (typically £2,000–£5,000) before committing to a full build. This surfaces hidden complexity early.
Prioritise working software over polish. A functional, ugly tool that real users can test is worth more than a beautiful prototype no one has clicked through.
Build on maintainable foundations. Cutting corners on architecture to save £5,000 upfront routinely costs £20,000+ to unwind later.
Plan for iteration. Budget at least 20% of the initial build cost for the first round of post-launch changes — because real user feedback always changes priorities.

Hidden Costs That UK Businesses Frequently Miss

Discovery and scoping: Skipping this to save money is false economy. Expect to pay £2,000–£8,000 for a proper technical discovery on any project over £20,000.
Hosting and infrastructure: Cloud hosting costs on platforms like AWS or Azure scale with usage. Budget £100–£1,000/month depending on traffic and data volumes.
Third-party service fees: Payment processing, mapping APIs, email delivery, SMS — these all carry per-transaction or monthly costs that add up quickly.
Security and compliance: If you are handling personal data, UK GDPR compliance is non-negotiable. A proper security review can cost £3,000–£10,000 on top of the build.
Training and change management: Internal tools only deliver ROI if staff actually use them. Budget for documentation and onboarding time.
Ongoing support retainer: Expect to spend 15–20% of the original build cost annually on maintenance, updates, and minor feature work.

Build vs Buy: When Custom Development Is Actually Worth It

Custom development is not always the right answer. If an off-the-shelf product covers 90% of your needs, the remaining 10% rarely justifies a six-figure build. But many UK businesses find themselves paying for four or five overlapping SaaS tools, maintaining complex spreadsheet workarounds, or losing hours every week to manual processes that a single well-built tool would eliminate. That is when custom starts to make economic sense.

Situation	Recommended Approach
Standard CRM, project management, or HR needs	Buy off-the-shelf (HubSpot, Monday, BambooHR etc.)
Off-the-shelf tool almost fits but requires extensive workarounds	Evaluate custom — the workaround cost is often invisible but real
Highly specific operational workflow unique to your business	Build custom — no SaaS product will ever fit this well
Multiple SaaS tools that do not talk to each other	Build a lightweight integration layer or single internal tool
Need to move fast on an MVP with a specific user journey	Build custom with a tight scope — do not shoehorn it into a generic platform

How to Get an Accurate Quote for Custom App Development

The quality of the quote you receive is directly proportional to the quality of the brief you provide. Vague briefs produce ballpark figures with enormous variance. A tight brief produces a quote you can actually hold someone to.

Write down the specific problem you are solving — not the solution you have imagined, the actual problem.
List the user types who will use the tool and what each one needs to do.
Identify every system the new tool will need to connect to (even loosely).
State your non-negotiables on security, data residency, or compliance requirements.
Be explicit about what is out of scope — this is as important as what is in scope.
Ask every supplier to break their quote down by phase and by line item. Any supplier unwilling to do this is a risk.

Warning

Be wary of any agency that gives you a firm fixed-price quote within 24 hours of receiving a brief, without asking clarifying questions. Either they have not thought it through, or the contract will be written in a way that protects them — not you — when scope questions arise.

What Bedrock Builds — and What We Charge

We are a small technical team that builds custom apps and internal tools for UK businesses. We do not staff large accounts or run drawn-out discovery programmes — we scope tightly, build quickly, and hand over something your team can actually maintain and extend. Our projects typically start from a paid discovery phase, after which you get a clear, line-item build proposal. If you want to understand what your specific project might cost, the most useful thing we can do is have a direct conversation about it. No decks, no sales process — just an honest assessment of what is involved.

Note

Thinking about a custom tool or app for your business? Get in touch for a straightforward conversation about scope and cost — no obligation, no agency theatre.