It’s probably the question we get asked the most: “How much does custom software cost?” And our answer, as frustrating as it may be, always starts with the same phrase: “It depends.” Not because we’re trying to dodge the question, but because the price of custom software depends on a multitude of factors — just like the price of a house depends on its size, materials, location, and finishes.
This article aims to give you all the keys to understanding what influences the cost of custom development, what price ranges to expect in 2026, and above all how to optimize your investment for the best value. Whether you’re an SMB owner, a business manager, or a SaaS project founder, this guide is for you.
Why Prices Vary So Much
When you ask for the price of custom software and get answers ranging from 5,000 euros to 500,000 euros, it’s not that vendors are pricing at random. It’s that the scope of what people call “custom software” is extraordinarily broad. Here are the main factors that drive cost variation.
Functional Complexity
This is the most obvious factor. A simple internal tool with a few forms, a dashboard, and a database doesn’t require the same effort as a complex application with advanced business workflows, sophisticated calculation rules, multi-level access management, and dozens of different screens. The more features there are, and the more those features interact with each other, the higher the cost. That’s why the first step in any project is to precisely define the functional scope, ideally as user stories or functional specifications.
Integrations With Third-Party Systems
Will your software need to connect to an existing ERP? A payment platform? A messaging service? A banking API? Each integration represents a specific development effort, which includes understanding the third-party API, building the connector, handling errors and edge cases, and testing. Some integrations are simple and standardized, like connecting to Stripe for payments. Others are complex and poorly documented, like integrating with certain legacy ERPs. The number and complexity of integrations significantly influence the budget.
Number of Users and Roles
A tool used by five people internally doesn’t have the same requirements as a platform aimed at thousands of external users. The number of users impacts the technical architecture, infrastructure needs, and performance requirements. Likewise, a system with a single user type is simpler than one with different roles (administrator, manager, salesperson, client), each with specific permissions and views.
Security and Compliance Requirements
If your application handles sensitive personal data, financial data, or health data, security and regulatory compliance requirements (GDPR, health data hosting, PCI DSS) impose specific technical measures: data encryption, access logging, security audits, penetration testing, enhanced backup policies. These measures represent additional cost, but they’re not optional when the nature of the data demands it.
Design and User Experience Level
Internal software can function with a clean, functional interface based on a standard component framework. However, a consumer-facing application or commercial SaaS requires much more extensive design work: UX research, wireframes, high-fidelity mockups, interactive prototyping, and user testing. The design phase can represent between 10% and 25% of a project’s total budget, depending on the level of quality expected.
Price Ranges in 2026
To give you concrete benchmarks, here are the broad price ranges we observe in 2026 on the French market. These figures include design, development, testing, and initial deployment, but not ongoing maintenance or hosting.
Simple Internal Tool: 5,000 to 15,000 Euros
In this range, you’ll find relatively simple internal applications. For example, a project tracking tool tailored to your methodology, a data entry form connected to a database with a reporting dashboard, or a lightweight internal CRM for tracking prospects. These tools typically have between three and ten screens, limited business logic, few or no complex integrations, and are intended for a small number of users. They can be developed in two to six weeks.
Custom Business Application: 15,000 to 50,000 Euros
This is the most common range for SMBs. We’re talking about more comprehensive applications that digitize a business process end-to-end. For example, an automated quote management system like the one we describe in our article on quote automation, a client portal that lets your customers track their orders and communicate with your team, or a scheduling and resource management tool with notifications and alerts. These applications have between ten and thirty screens, significant business logic, a few integrations with third-party services, and role-based access control. Development typically spans two to four months.
SaaS MVP: 30,000 to 80,000 Euros
If you’re building a SaaS product — software you’ll sell as a service to customers — the budget is naturally higher. A SaaS MVP (Minimum Viable Product) must not only deliver the core features that provide value to users, but also incorporate the entire multi-tenant management layer, billing, onboarding, security, and monitoring needed for commercial operation. A typical SaaS MVP has between twenty and fifty screens, a multi-tenant architecture, an integrated recurring billing system, an advanced admin interface, and a level of quality and polish suitable for commercial use. Expect three to six months of development. You can visit our dedicated SaaS creation page to learn more about our approach.
Complex Platform: 80,000 Euros and Above
Beyond 80,000 euros, we enter the realm of complex platforms: a marketplace with multiple user types, a financial platform with strict compliance requirements, an industrial system with IoT integrations, or a complete overhaul of a company’s information system. These projects involve larger teams, longer timelines, and more structured project management. They generally don’t apply to SMBs with fewer than 50 employees, but it’s important to mention them for a complete picture of the spectrum.
An Important Caveat
These ranges are indicative and reflect prices charged in France in 2026 for professional-quality work. Significantly lower prices may indicate offshoring, a lower quality standard, or a smaller functional scope than what you envision. Conversely, much higher prices may reflect genuine complexity or high margins. In all cases, be wary of quotes that seem too good to be true: in software development, as everywhere else, quality comes at a price.
What Drives the Bill Up (or Down)
Beyond the initial functional scope, several factors can significantly shift the final budget compared to the initial estimate.
Scope Creep: Enemy Number One
Scope creep is the most frequent cause of budget overruns. “Hey, what if we also added this feature?” “Actually, it would be nice to also do that.” Each individual addition may seem harmless, but the accumulation of small additions can easily inflate the budget by 30% to 50%. The remedy: clearly define the initial scope, formally validate it, and treat every addition as a scope change requiring a budget and timeline reassessment.
Vague Specifications
“I want a dashboard.” Yes, but with which metrics? Which data sources? Which filters? What time granularity? Vague specifications lead to costly back-and-forth between client and developer, misunderstandings, and features built then scrapped because they didn’t match the actual need. The clearer and more detailed the specifications are upfront, the more efficient the development and the more controlled the budget. This doesn’t mean spending six months writing a 200-page requirements document. But at minimum, every feature should be described with enough precision to eliminate ambiguity about what needs to be built.
The Iterative Approach as a Cost Lever
An iterative approach, where the software is developed and delivered in successive increments, helps reduce risk and often costs. Each increment is tested and validated by real users before moving to the next. This approach catches design mistakes early, allows priorities to be readjusted along the way, and avoids developing features that ultimately prove unnecessary. It’s the opposite of the “tunnel” approach, where everything is built in one block over six months before anyone sees the result.
MVP First, Extras Later
The best strategy for controlling your budget is to start with an MVP — a minimal but functional version of your software. Identify the three to five absolutely essential features, the ones without which the software has no value, and focus exclusively on those for the first version. Once the MVP is in production and being used by real users, you’ll have a much clearer picture of which features to add next and which can wait or even be dropped entirely.
Freelancer, Agency, or Technical Studio: How to Choose?
Your choice of service provider is at least as important as your choice of technology. Three main options are available, each with its own advantages and limitations.
The Freelancer
Working with a freelance developer is often the least expensive option in terms of daily rate. A good freelance developer in France charges between 400 and 700 euros per day in 2026. The advantages are flexibility, a direct relationship with no intermediary, and often great responsiveness. The limitations are real, though: a freelancer is one person. If they’re sick, on vacation, or overbooked, your project stops. It’s rare for a freelancer to master backend development, frontend, UX design, DevOps, and project management all at once. And if the relationship goes south or the freelancer ceases activity, the continuity of your project can be compromised.
The Large Digital Agency
At the opposite end of the spectrum, large digital agencies offer a full structure with project managers, designers, frontend and backend developers, testers, and sometimes business consultants. They can deploy significant teams on complex projects. The downside is a significantly higher cost, with average daily rates between 800 and 1,200 euros. Part of that cost funds the agency’s overhead rather than direct production. Moreover, in large agencies, team turnover can lead to knowledge loss on your project, and you don’t always have a guarantee that your contacts will remain the same from start to finish.
The Technical Studio: The Best of Both Worlds
A technical studio like Dev Worker sits between these two extremes. It’s a small outfit of experienced developers — large enough to offer the versatility and continuity that a solo freelancer can’t guarantee, but small enough to maintain a direct relationship, strong responsiveness, and controlled costs. The studio knows your project inside out, the same people support you from scoping to deployment, and communication is smooth with no unnecessary intermediaries.
At Dev Worker, we believe this model is particularly well-suited to SMBs. It offers the best trade-off between quality, cost, and reliability. You can check out our projects to see concrete examples of work we’ve delivered in this framework.
How to Optimize Your Investment
Whatever your budget, here are concrete strategies to get the most out of your custom development investment.
Adopt the MVP Approach
We’ve already mentioned it, but it’s important enough to bear repeating. Don’t try to build the perfect solution on day one. Build the simplest version that already delivers value, put it into production, observe how your users actually use it, and iterate. This approach lets you validate your assumptions with minimal investment and direct future spending based on real data rather than guesswork.
Ruthlessly Prioritize Your Features
List all desired features, then sort them into three categories. Must-have features — those without which the software makes no sense. Important features — those that add significant value but whose absence doesn’t render the software unusable. Nice-to-have features — small enhancements that improve the experience but aren’t critical. Focus your initial budget exclusively on the first category, and add the others over time based on user feedback and your budget.
Invest in Specifications
Time spent properly defining your needs before development begins is one of the best investments you can make. Clear specifications reduce back-and-forth, misunderstandings, and features that need to be rebuilt. They also make it possible to get more accurate budget estimates and better compare proposals from different providers.
Plan for a Maintenance Budget
Software isn’t a finished product you buy once and forget about. It requires regular maintenance: bug fixes, security updates, feature enhancements, and adaptation to new browser and operating system versions. Plan for an annual maintenance budget representing 15% to 25% of the initial development cost. This budget will keep your software up to date, secure, and aligned with your evolving needs.
Measure the Return on Investment
Before launching your project, define the metrics that will let you measure its success. Time saved by your teams, reduction in error rates, revenue growth, improved customer satisfaction. Measure these indicators before deployment, then regularly afterward. This data will help you justify the investment, decide on priority enhancements, and assess whether your project is meeting its goals.
Ready to Get a Quote for Your Project?
You now have all the keys to understand the cost of custom software and to optimize your investment. The next step is to move from theory to practice.
At Dev Worker, we offer a free, no-commitment initial conversation to discuss your project. We’ll help you clarify your needs, define the scope of a relevant MVP, and give you a realistic budget estimate. No surprises, no hidden costs — we work with full transparency.
Whether your project is an internal tool to optimize your processes, a business application to digitize your operations, or an ambitious SaaS product, we have the experience and methodology to guide you. Check out our projects for concrete examples, explore our SMB automation and SaaS creation services, or contact us directly to start the conversation.
Your custom software is a strategic investment. With the right partner and the right approach, it can transform your business for the long term. All that’s left is to take the leap.