"How much does custom software cost" doesn't have a single answer - a simple internal tool and a client-facing system with payment processing are entirely different projects. Here's what actually drives the price, and realistic ranges by project type.
What Actually Drives the Cost
- Integrations - connecting to Xero, a CRM, or existing systems adds real complexity, often more than the core functionality itself
- Number of user roles - a system with just one type of user is far simpler than one needing separate admin, staff, and client-facing views
- Data complexity - how much data is being tracked, and how it relates to other data in the system
- Compliance requirements - payment handling, health data, or other regulated information adds development and security overhead
- Design and usability investment - a polished, intuitive interface costs more than a purely functional one
Realistic Cost Ranges by Project Type
Simple Internal Tool
A single-purpose tool for internal use - a booking calendar, a basic tracking system - typically $8,000-$20,000, depending on integrations required. See our guide on custom booking systems vs booking app subscriptions for a real example of this category.
Mid-Complexity Business System
A system with multiple user roles, meaningful integrations, and genuine business logic - an ordering system with trade pricing tiers, for example - typically $20,000-$60,000. See our guide on custom ordering systems for trade suppliers.
Complex or Client-Facing Platform
A full client portal, e-commerce platform with complex logic, or a system integrating multiple external services, typically $60,000-$150,000+ depending on scope.
Custom Software vs SaaS Subscriptions: The Real Comparison
The upfront cost of custom software is always higher than signing up for a SaaS subscription. The comparison that actually matters is a multi-year one: subscription costs compound every month, and off-the-shelf tools often force workflow compromises that cost real time. Over three to five years, a well-scoped custom system frequently costs less in total than stacking multiple SaaS subscriptions to approximate the same workflow.
How to Keep the Cost Under Control
- Start with the highest-value piece of functionality rather than trying to build everything at once
- Insist on a proper scoping phase before accepting a fixed quote - vague requirements lead to scope creep and cost overruns later
- Budget for ongoing maintenance, not just the initial build - software needs continued investment, similar to any other business asset
Frequently Asked Questions
Is custom software always more expensive than an off-the-shelf subscription?
Upfront, generally yes. Over several years, it depends on your subscription spend and how well the off-the-shelf tool actually fits your workflow - a business paying for multiple overlapping SaaS subscriptions to work around gaps in each one can find custom software cheaper over a 3-5 year horizon.
Can I start small and expand a custom system over time?
Yes, and this is usually the sensible approach - build the highest-value piece first, prove it works, then expand. This spreads cost over time and reduces the risk of over-building features that turn out not to be needed.
What ongoing costs should I budget for after the build?
Hosting (typically modest, $50-$300/month depending on scale), and ongoing maintenance or feature updates - budget roughly 15-20% of the original build cost per year for this, similar to how any software product needs continued investment.
How do I get an accurate quote rather than a rough estimate?
A proper quote requires a scoping phase - documenting exactly what the system needs to do, who uses it, and what it needs to integrate with. Be wary of a fixed-price quote given without this step, since a genuinely accurate cost estimate can't exist without understanding the actual requirements first.
We scope custom business systems properly before quoting - so the number you get reflects what the project actually needs, not a guess.
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Call 0433 087 091 - we'll scope your requirements and give you a realistic, itemised cost estimate.
Get a Free Scoping CallFor related reading, see our guides to custom ordering systems vs generic e-commerce and business software integrations.