How Much Does Custom Software Cost? 8 Factors That Drive the Price
Why do custom software quotes vary so much? The 8 factors behind software cost (scope, integrations, design, security, upkeep) plus savings tips.
"How much will this software cost?" is the question we hear most often. Receiving one quote for $2,000 and another for $20,000 for the same need isn't unusual either. Where does that gap come from? In this article we break down the factors that determine custom software cost and how to spend your budget wisely.
The basic formula
The main component of custom software cost is effort. Put simply: total effort (person-days) × the team's daily rate. Anything that affects duration therefore directly affects cost.
1. Scope: screens and modules
Scope is the biggest driver. How many screens, user roles and workflows will there be? The difference between a 10-screen internal tool and a 50-screen ERP naturally shows in the price.
2. Business-rule complexity
Two screens can look identical, yet one hides a simple save while the other hides a limit-calculation engine with dozens of conditions. Tiered limits that vary by company, vehicle and location, multi-step approval flows or custom pricing algorithms all add significant effort.
3. Integrations
Every integration — e-invoicing, payment gateways, marketplaces, carriers, ERP or banks — is its own work item. The quality of the other system's documentation and whether a test environment exists directly affect the timeline.
4. Design
Building on an existing design system is fast and economical. Brand-specific UI/UX design, user research and clickable prototypes take extra time, but noticeably improve satisfaction — especially for customer-facing products.
5. Number of platforms
Web only, or web + iOS + Android? Cross-platform technologies such as .NET MAUI reduce cost by targeting several platforms from one codebase, but each platform still means testing and release effort.
6. Security and compliance
GDPR compliance, detailed audit logging, role-based access, two-factor authentication, penetration tests... In finance, healthcare and energy these requirements are mandatory and add effort.
7. Data migration
Moving data out of legacy systems is often harder than expected. Cleaning, mapping and validating data is a separate work package.
8. Maintenance and support
Software lives on after launch. Updates, security patches, server management and small enhancements usually call for a monthly maintenance budget.
Pricing models
| Model | Best when |
|---|---|
| Fixed price | Scope is clear and stable. Predictable budget. |
| Time & materials | Scope is uncertain or will evolve. Flexible and transparent. |
| Monthly team / retainer | Long-running product development and maintenance. |
5 ways to save budget
- Start with an MVP: ship the 20% of features that solve 80% of the problem first.
- Write requirements down: ambiguity is the biggest enemy of cost.
- Use proven components: rely on established libraries for authentication, reporting and similar concerns.
- Give fast feedback: joining sprint demos prevents building in the wrong direction.
- Don't judge on price alone: the cheapest quote can become the most expensive once maintenance and rewrite risk are counted.
Conclusion
An accurate estimate starts with good requirements analysis. For a first idea, use the Project Estimator to see a rough timeline, then book a free discovery call to receive an itemised, fixed-price proposal.