Custom business software usually runs $15,000 to $60,000 for a focused system that does one job well, and $60,000 to $250,000+ for a platform that runs a real chunk of your operation — and the same idea can land anywhere in that spread depending on how much of your business it has to absorb. That's a wide range, so instead of hiding behind "it depends," let me tell you exactly what moves the number.
I'm Matt. I build custom software for construction companies, manufacturers, and dealer networks — quoting systems, inventory and reconciliation platforms, commission automation, integration engines, whole business-management platforms. So I'll be straight with you about where the money actually goes.
The quick ranges
Here's roughly where things sit, based on what building this stuff actually takes:
- A single-purpose tool or automation: ~$8,000–$25,000. Think "drop in a sales report, it calculates tiered commissions and emails PDF statements," or a script that reconciles two systems that don't talk.
- A focused internal system: ~$25,000–$60,000. One clear workflow end to end — an ordering portal, an inventory tracker, a quoting tool — with a database, real permissions, and a handful of user roles.
- A platform that runs an operation: ~$60,000–$250,000+. Quote-to-cash from itemized quote to final payment. A manufacturer's full order lifecycle across company and shop levels. Multiple portals, dozens to hundreds of API routes, integrations, accounting sync.
- Ongoing (hosting, fixes, changes): ~15–25% of the build per year is a sane way to budget, less if the thing is stable, more if you keep adding to it.
Most small and mid-sized businesses I work with land in that middle band and grow into the top one over a couple of years. If a five-person shop gets quoted $400,000 for an internal tool, that's not a scam — it's an enterprise consultancy pricing an enterprise engagement. It's just probably not the engagement you need.
Why the same idea gets a $30k quote and a $200k quote
The number is not really about your industry. It's about how much of your business the software has to swallow, and who's building it.
A single workflow is one price. The moment that workflow touches three other workflows — quoting feeds orders, orders feed purchasing, purchasing feeds inventory, inventory feeds invoicing — you're not building a tool anymore, you're building a system where every part has to stay honest with every other part. That coordination is most of the cost. It's also most of the value, which is why people pay for it.
Then there's who builds it. An agency staffs your project with a project manager, a designer, a couple of developers, and QA, plus the overhead to keep all of them booked. You're paying for structure and redundancy. A solo developer is one person's time, so the headline number is lower — but you're betting on that one person being good and being around. Neither is wrong. It's a trade between price and structure, and the right answer depends on how much risk you can carry.
What actually moves the price
Beyond scope and who builds it, here's what pushes a quote up or down:
- Number of user roles. A tool for one team is simple. A system with an owner view, a shop view, a dealer view, and a customer portal means every screen gets built and permissioned several times over. This is the biggest hidden lever I see.
- Integrations. Connecting to QuickBooks, a payment processor, an ERP, or an existing database is real engineering — you're conforming to someone else's rules, and their edge cases become your edge cases.
- Data migration. Getting years of messy spreadsheets and legacy records into a clean schema is often its own small project. People forget this line item constantly.
- How gnarly your business logic is. Tiered commissions, unit-level serial tracking, change orders, configurable product options with trim and color rules — the weirder and more specific your rules, the more hours it takes to get them exactly right.
- Reporting and reconciliation. "Just show me the numbers" is never just. Auto-flagging discrepancies between two systems is some of the highest-value, highest-precision work there is.
- Polish and edge cases. The demo is 60% of the work. The last 40% is every weird thing a real user does at 4:45 on a Friday. Cheap quotes quietly skip this, and you pay for it later in bugs.
Build vs. buy — the honest math
Before you spend a dollar on custom, ask whether off-the-shelf software does the job. Sometimes it does, and I'll tell you so.
Off-the-shelf is cheaper up front and someone else maintains it. The catch is you bend your business to fit their software, you pay per seat forever, and you stop at the edge of what they allow. For a lot of standard needs — accounting, email, basic CRM — that's the right call. Don't build what you can buy.
Custom earns its cost in exactly one situation: when the way you work is a real competitive advantage, or so specific that no product fits it, and the workarounds are costing you money. Run the actual math. Add up per-seat subscriptions across every tool the custom system would replace, times your headcount, times three to five years. Then add the hours your team burns on manual re-keying, spreadsheet juggling, and fixing errors that a system would catch. Put that total next to the build cost. When people do this honestly, custom often wins on a multi-year horizon — not because it's cheaper day one, but because the subscriptions and the manual labor never stop.
The other thing you're buying: you own it. No per-seat tax that climbs as you grow, no feature you depend on getting deprecated on someone else's timeline, no ceiling. That's worth real money, and it usually doesn't show up in the first quote you compare.
How to get a straight number
The reason no honest developer will put a fixed price on a page is that "custom software" means a hundred different things. A commission calculator and a quote-to-cash platform share two words and nothing else. The fastest route to a real number is a short, specific conversation about what you're actually trying to fix.
That's how I work. You tell me the workflow that's bleeding time or money, and I come back with honest questions and a real range — not a sales script. You see the plan and the price before anything gets built. If off-the-shelf is the smarter move for you, I'll say that too.
If you want a straight read on what your project would actually cost — no obligation — send me a note through the contact form and I'll get you a real answer, usually the same day.