Software development cost is driven by the size of the scope, the number of systems to integrate, user roles and permissions, the platform (web, mobile or both), data migration and testing, and the maintenance load after go-live. That is why any answer to "how much does software cost?" given before a requirements analysis is only a guess.
A reliable budget comes from a proposal that puts the scope in writing, splits it into phases, prices each phase separately and accounts for ongoing maintenance. Below we cover the eight factors that set the price, the main pricing models and how to compare proposals properly.
Why quotes for the same project differ so much
Business owners who ask three developers to quote for a project are often surprised by how far apart the numbers are. In most cases the developers are not pricing the same work. One quote covers the screens and basic record-keeping; another also includes accounting integration, a mobile app and migration of old data; the third has added a risk margin for every point left vague.
Take a simple example. A wholesaler wants an app that lets field sales reps take orders. The first developer prices an order form and an admin list. The second includes customer-specific price lists, live stock pulled from the accounting system and the ability to enter orders offline in a warehouse with no signal.
The third mentions none of this but builds in a contingency. All three quotes are headed "order app", yet the second describes several times the work of the first.
The vaguer the request, the wider the spread. "We need an order-tracking system" can describe a few weeks of work for one firm and several months for another. To understand cost, compare scope, not price.
What overruns really cost
In software, the expensive part is rarely the initial fee; it is the extra cost that surfaces along the way. ERP, the most thoroughly measured type of business software project, shows the pattern clearly:
According to Panorama Consulting Group's 2026 ERP Report, more than a quarter of organisations went over budget and almost a quarter went over schedule; the median project timeline was 9 months.
The same report identifies an unexpected need for additional technology as the most common cause of overspending, and organisational issues as the most common cause of delay. The extra money, in other words, is seldom the result of bad code. It comes from an integration nobody anticipated, a decision made late, or a requirement that changed mid-project.
The wider picture is similar. BCG's 2020 study "Flipping the Odds of Digital Transformation Success" found that 70% of digital transformations fell short of their objectives; only 30% met or exceeded their target value and produced lasting change. The cost of a project that misses its goal is not just the money spent but the efficiency never realised.
Hiring your own developer is not always the cheaper shortcut it appears to be. According to TurkStat's ICT Usage in Enterprises Survey 2026, 31.7% of Turkish enterprises with 10 or more employees that recruited or tried to recruit ICT specialists reported difficulties. The cost of an in-house team goes beyond salary: recruitment time, dependence on one person and the knowledge that leaves when that person does all belong in the calculation. If you will work with an outside firm, our guide to choosing a software company sets out the criteria.
The 8 factors that set software development cost
- Scope and business rules. How many screens, processes and exceptions? An order form is simple; price rules that vary by order, stock reservation and approval steps multiply the work.
- User roles and permissions. A system where everyone sees everything is very different from one where access is separated by department, branch and role.
- Integrations. Accounting or ERP, your e-invoicing provider (e-Fatura, Türkiye's mandatory electronic invoicing system), online shop, courier, bank: each connection means its own analysis, development and testing. Our API integration service explains what is involved.
- Platform. Is a web panel enough, or do you also need a mobile app for staff in the field? Offline working in particular has a noticeable effect on mobile cost. We explain how the technology choice affects cost in native vs cross-platform apps.
- Data migration. Cleaning data from an old program or spreadsheets and moving it into the new system is often missing from quotes, yet it takes real time. We cover the clean-up in data quality and duplicate records.
- Reporting. Standard lists are cheap; management dashboards, period comparisons and export options are separate items.
- Hardware. Barcode readers, field terminals, sensors or a dedicated device add hardware, installation and on-site testing to the cost.
- Maintenance, hosting and support. Server or cloud costs, security updates, small change requests and support are an ongoing cost, separate from the initial project fee. The real cost of cloud hosting is covered in cloud migration cost.
Pricing models: which suits you?
| Model | How it works | When it fits | Watch out for |
|---|---|---|---|
| Fixed price | One fee for a defined scope | When scope is clear and written | Anything out of scope needs a new quote |
| Time and materials | Pay for effort spent | When scope is unclear and discovery is needed | Needs regular reporting and a cap |
| Phased | Each phase has its own scope and fee | Mid-sized and large projects | Phase one must deliver value on its own |
| Subscription | Monthly or annual usage fee | Ready platforms and SaaS products | Clarify how you can export your data |
For mid-sized organisations the phased model is usually the healthiest: the most valuable piece goes live first, and later phases are shaped by real use. The first budget stays small, and so does the risk of building the wrong thing perfectly.
Subscription suits standard needs that every organisation shares. Our Smart360, which brings business email and file management into one panel, needs no installation and is paid monthly or annually. Needs like these do not call for a software project budget, which leaves that budget free for the work that sets you apart.
Just as important as the model is how change requests are handled. New ideas during a project are natural and often a good sign: users have started to see the system. The problem arises when those ideas slip into scope verbally. Handling each change through a written request, a written assessment of its effect on time and cost, and sign-off from the decision-maker is the simplest way to keep a budget under control.
How to compare proposals properly
When comparing proposals, look past the total and ask:
- Is the scope written out item by item, or reduced to one-line headings such as "order module"?
- Are integrations, data migration and testing shown as separate items?
- Are acceptance criteria defined? What makes a phase "done"?
- Are post-launch maintenance and support costs and scope clear?
- Who owns the source code, documentation and database access? We cover this in detail in software contracts and source code.
A proposal that cannot answer these questions clearly may be the most expensive option even if it looks the cheapest. To compare the total cost of custom software with a package, see our guide to custom vs off-the-shelf software; for how to pin down scope before you ask for quotes, read our software requirements analysis guide.
How we pin down cost at Digital Bridge
Because most cost surprises come from unclear scope, our proposal process is built around clarifying it:
- Requirements analysis first. We review your processes, current programs and integration points. On projects we do not sell packaged software, so the analysis exists to establish what genuinely needs building, not to steer you towards a product.
- A written proposal covering scope, phases and fee. Each phase is described and priced separately, and anything out of scope is stated explicitly.
- Web, mobile and integration in one team. Our custom web software, mobile and integration work is delivered by the same team, so there are no "not our problem" gaps between interfaces.
- Free technical feasibility for hardware. If the project needs a dedicated device, terminal or sensor, our device manufacturing and IoT team carries out the technical feasibility study free of charge and shows hardware costs alongside software items.
- Support after go-live. Technical support is available around the clock, and the maintenance scope is defined separately in the proposal.
You can find all our service areas on our software solutions page.
Next step
Before discussing budget, write down three things: the three most important problems the software should solve, the existing systems it must talk to, and what absolutely has to be in the first phase. Even this short note narrows the gap between proposals considerably. Once it is ready, contact us and we will clarify the scope together and prepare a written, phased proposal.