How much does custom software cost for a small business? (2026, US & UK)
Ask three dev shops and you'll get three quotes that don't explain themselves, a vague "it depends," and a sales call. This is the version we'd want if we were buying: real ranges, what drives them, what the quote leaves out, and when custom software is actually the right call - written for people businesses - agencies, accountants, lawyers, consultants, recruiters - of 10-60 people, and with our own prices included so you can see where we sit.
The short answer
For a small business in 2026, custom software typically costs:
| What you're buying | US | UK | Time |
|---|---|---|---|
| A single automation or integration | $2,000-5,000 | £1,600-4,000 | 1-2 weeks |
| A dashboard, client portal or onboarding system | $8,000-18,000 | £6,000-14,000 | 2-6 weeks |
| A custom CRM or multi-part internal tool | $15,000-30,000 | £12,000-24,000 | 4-10 weeks |
| A full custom application (dev-shop scale) | $30,000-150,000+ | £25,000-120,000+ | 2-6 months |
| Ongoing monitoring, fixes and improvements | $1,500-7,500 / month | £1,200-6,000 / month | Ongoing |
The last row is the one most quotes leave out, and it's the most important. More on that below.
What actually drives the price
- 01
How many systems it touches
A tool that reads from one app and writes to another is cheap. One that has to keep your CRM, accounting software and practice tool consistent - with their different ideas of what a "client" is - costs more, because reconciling messy real-world data is most of the work.
- 02
How much judgement is involved
Moving a record is simple. Deciding what to do with a messy document, matching invoices to projects, or drafting something a person then reviews needs real logic (and, increasingly, AI with a human in the loop). Judgement costs more than plumbing.
- 03
Who's building it
A traditional dev shop bills a team by the hour - a PM, a designer, two developers - which is how a portal becomes a $50,000 project. A senior engineer working with AI tools and a library of pre-built components does the same work in a fraction of the hours. That difference is most of the gap between the ranges above.
- 04
Whether you're starting from scratch
If the builder has already made client portals, onboarding flows and reporting tools for businesses like yours, you're paying to adapt, not to invent. Ask any vendor what they've built before for firms like yours; the answer predicts the price.
- 05
Polish
A tool your ops team uses needs to be clear and reliable. A tool your clients log into needs to look like your brand. Client-facing adds design time.
What the quote leaves out
Looking after it
Software isn't finished when it ships. Apps you depend on change their APIs. A field gets renamed. A model gets deprecated. Someone needs a new report. Over three years, the cost of keeping a tool working and improving usually exceeds the cost of building it. A quote that doesn't include this is a quote for something that will quietly stop working. We price it as a monthly run plan precisely because pretending it's free is how small businesses end up with dead software.
Adoption
A tool nobody uses costs the full price and delivers nothing. Rolling it out - training, the two-week check-in, fixing the friction - is work. Ask who does it.
Changes
Your business will change. Ask what a change costs after launch, and whether it's a new quote every time or part of a plan.
Discovery
Good builders won't quote a fixed price until they've understood your workflow. A short paid audit ($2,000-5,000) that produces a scoped, fixed-price plan is a sign of a serious vendor, not a cost to resent.
When custom software pays off (and when it doesn't)
Buy off-the-shelf
when a mainstream tool does 90% of what you need and your process can flex to fit. Most of your stack should be bought, not built.
Go custom
when the gap is costing real hours every week - when you're running a spreadsheet alongside the "real" system, when two apps refuse to talk, when a client-facing experience depends on it, or when your team is doing by hand what should move automatically. The maths is simple: if your people lose five hours a week each to copy-pasting and chasing between apps, a 10-person firm is losing roughly a full-time person's hours. A $10,000 build plus $2,000 a month that recovers most of that pays for itself in a quarter.
Don't go custom
to replace a tool that fits fine, to build something a $40/month SaaS does, or because a vendor made it sound exciting. The best builders will tell you when to buy instead.
Our prices, for comparison
We publish them because small businesses deserve to filter on price before a call. A two-week ops audit is $2,500 (£2,000) and is credited to your first month. Run plans - monitoring, fixes and improvements - are $2,000, $3,500 or $7,500 a month depending on how much we build and look after for you, and your first build is included - along with training your team and managing the change so it actually gets used. The software runs on your own accounts, so you own it, and you pay those tool costs directly. We're a senior engineer working with AI and a library built for people businesses, which is how we sit at the lower end of the ranges above without being the cheap offshore option.
Questions, answered plainly
How much does custom software cost for a small business?
Typically $2,000-5,000 for a single automation, $8,000-18,000 for a portal, dashboard or onboarding system, $15,000-30,000 for a custom CRM or multi-part tool, plus $1,500-7,500 a month to look after and improve it.
Why do dev-shop quotes vary so much?
Team size and billing model. A traditional shop bills a PM, designer and developers by the hour; a senior engineer with AI tools and pre-built components does the same work in far fewer hours.
Is it cheaper to use no-code?
The software licence is cheaper. But with no-code you become the builder and maintainer, which costs your team's time - and most no-code tools hit a wall on logic, volume or integrations. It's a good fit for simple tools you're happy to own.
What does maintenance cost?
Typically $1,500-7,500 a month for a small business, depending on how much is being looked after and improved. Over three years it usually exceeds the build cost - which is why it should be in the plan from day one.
How do I get an accurate quote?
Pay for a short discovery audit that produces a scoped, fixed-price plan. Anyone quoting a precise figure before understanding your workflow is guessing.