How long does custom software development take?
Realistic custom software timelines: an MVP in 2-4 months, a mid-size business app in 4-9 months. What stretches deadlines and how discovery shortens them.
Custom software development typically takes 2-4 months for a first working version (MVP), 4-9 months for a mid-size business application, and a year or more for complex platforms. A vendor quoting a precise date before understanding your processes is guessing. Here is what the ranges look like - and what decides which end you land on.
Typical timelines by project size
| Project | Typical timeline |
|---|---|
| Discovery and specification | 2-4 weeks |
| Simple internal tool | 6-12 weeks |
| MVP of a new product | 2-4 months |
| Mid-size business application (multi-role, integrated) | 4-9 months |
| Complex platform or enterprise system | 9-18+ months |
These are industry benchmark ranges, and our own projects land inside them. The development process itself - discovery, design, build, operate - is the same at every size; what scales is how much of each phase you need.
What stretches a timeline
Three things delay software projects far more often than slow coding. First, unclear scope: every “we’ll decide later” becomes a mid-project redesign. Second, decision latency - a team that waits a week for every approval adds weeks to the calendar without adding work. Third, integrations: each external system (ERP, payment provider, government API) brings its own documentation, sandbox access, and surprises - the most underestimated item in most plans. Data migration and regulatory requirements add further tail risk.
What actually compresses it
The reliable accelerators are boring: a smaller first release, decisions made fast, and problems found on paper instead of in code. A discovery sprint front-loads the expensive surprises into the cheapest phase - which is why a project with a two-week discovery usually finishes earlier than one that “saved” those two weeks. Cutting scope to a true 12-week MVP and naming a single decision-maker do more than any tooling. AI-assisted coding speeds up routine work, but review, testing, and integration still dominate the calendar - treat “done in weeks” promises like prices that look too good against realistic budgets.
Timeline and budget move together
The same drivers set both: scope, integrations, and complexity. A realistic plan states each phase, what you will see at the end of it, and which assumptions could move the date. If an estimate has no assumptions attached, it is not an estimate - it is marketing.
Frequently Asked Questions
How long does an MVP take? Around 12 weeks is a realistic target for a focused MVP - one core workflow, a handful of screens, one or two integrations - after a short discovery phase.
Why do software projects run late? Mostly scope changes, slow decisions, and underestimated integrations - not slow programming. The fixes are process fixes: discovery, phasing, one decision-maker.
How long does the discovery phase take? Typically 2-4 weeks. It produces the specification, priorities, and risk list that make the rest of the estimate meaningful.
Can AI coding tools cut the timeline in half? No. They speed up routine implementation, but design, review, testing, and integration - the majority of the calendar - remain human work.
How accurate are timeline estimates? Before discovery, expect a wide range, not a date. After discovery, a phased estimate with named assumptions is reliable enough to plan a launch around.
Related Articles
- How much does custom software development cost in Croatia?
- How a discovery sprint removes project risk
- How to build an MVP in 12 weeks
Want a realistic timeline for your project?
Tell us what you are building and we will map it into phases with honest dates - including the assumptions behind them.
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