TimelinesMethodBusiness softwareAI
How long does it take to build a business app?
7 min read
A business application usually takes a few weeks to reach a first usable version and a few months for a broad scope. The timeline depends less on the number of screens than on integrations, data migration and how fast decisions are made on the client side. Showing a prototype before development starts is what shortens a project the most, because it settles questions before they cost time.
A duration quoted without phases or assumptions is not worth much. Here is how a project actually breaks down, what slows it, what speeds it up, and what building with AI does and does not change.
A market benchmark, read with care
Few sources publish project durations. Clutch, the B2B review platform, compiles the budgets and timelines reported in verified client reviews. Its software development pricing page, updated in September 2026, reports an average project duration of about 13 months.
That figure is worldwide, covers every budget size, and an average is pulled up by large programmes. It describes whole projects, not first releases. What it does tell you is that software is rarely measured in days, and that the useful question is not "how long in total" but "when will I have something my team can use".
The five phases of a project
| Phase | What happens | What moves the duration |
|---|---|---|
| Discovery | Understanding the problem, the users and the tools in place | Availability of the people who know the process |
| Prototype | Screens, user journeys and realistic data, shown before any build | Number of journeys to cover, speed of feedback |
| Staged development | Building, integrating, migrating data | Business rules, connections to other systems, data quality |
| Acceptance testing | Users test with real cases | Availability of testers, quality of their feedback |
| Go-live | Deployment, training, cut-over | Whether old and new tools must run in parallel |
At LPR Studio, the visual prototype is presented in a video call within 5 working days of the first scoping conversation. It is short on purpose: its job is to make the scope visible while nothing has been built yet. The full process is described on our approach page.
What slows a project down
Pending decisions. This is the first cause of delay, and it never shows up in a quote. A screen waiting for sign-off, a pricing rule that two teams interpret differently, technical access requested from a third-party vendor: each open question stalls part of the work.
Integrations. Connecting to an ERP, an accounting package or an older database means understanding a format, getting credentials, handling errors and duplicates. When the other system has no documented API, this line can double. It is often the most underestimated part of a plan.
Data migration. Years of spreadsheets, duplicates and conflicting versions do not migrate with one click. Someone has to clean, reconcile and have the result checked by a person who knows the business. This work is invisible in the finished application and heavy in the schedule.
A moving scope. Adding "just one more screen" mid-project is never just a screen: it has to be designed, wired to everything else and tested. Scope that changes without an explicit trade-off pushes back every later date.
What speeds a project up
A prototype approved before coding. It turns abstract discussions into concrete yes-or-no decisions on real screens. Disagreements that would have surfaced during testing are settled early, when they cost almost nothing. Our guide to prototypes, MVPs and proofs of concept explains what each step proves.
One available decision-maker. A person on your side who knows the process and can decide within the week often saves more time than an extra developer.
A narrow first release. Ship the process that saves the most time first, then add in stages. That is the logic of an MVP: every stage is usable, and feedback from real users steers the next one.
Data prepared early. Start cleaning your existing files while the application is being built, not at the end.
Building with AI: what really changes
Search engines now suggest "how long does it take to build an app with AI" before almost anything else, so the question deserves a straight answer.
AI coding tools genuinely speed up some tasks: writing repetitive code, drafting tests, producing documentation. A team that uses them well ships faster. But AI does not decide your discount rules, does not get you access to your ERP and does not sign off a screen on your behalf. That is where most of a project's calendar time goes.
AI also brings a risk: code produced quickly and never properly reviewed. The speed gain only holds if every line is checked by a developer who understands it, and if security, data handling and maintenance are designed by people who will answer for them. An app generated in an afternoon can be a good mock-up; it is rarely something you can run your business on for five years.
Orders of magnitude by project type
Without inventing numbers, here is how typical projects compare:
| Project type | First usable version | Note |
|---|---|---|
| Internal tool for one team, few integrations | A few weeks | The fastest case, if decisions keep up |
| Application replacing a shared spreadsheet | A few weeks | Data clean-up often sets the pace |
| Client portal with invoicing and accounting link | A few weeks to a few months | Integrations weigh heavily |
| Multi-site software, role-based access, several connected systems | A few months | Staged delivery is essential |
What matters is the date of the first useful release, not the date of the last feature. An application your team uses from month two and improves afterwards pays back more than a perfect one delivered in a single block after a year. If you are weighing the budget alongside the timeline, our article on mobile app development cost shows that the same factors drive both.
How to get a schedule you can trust
- State the problem and the real deadlines. A date tied to a season, a trade show or a regulatory change belongs in the first conversation: it changes how the project is sliced.
- See the scope before it is priced. A schedule is only reliable once the scope is closed, and a prototype is how you close it.
- Fix the date, flex the scope. What must work on day one goes first; the rest waits for the next release.
- Insist on usable stages. A plan that shows nothing until the end leaves you no chance to correct course or stop in time.
Where to start
Describe your need and your deadline in a few lines. We reply within 24 working hours, then present a free visual prototype in a video call within 5 working days, wherever you are. The schedule is set from that prototype, together with the fixed price, so you know when you will have a first version in your hands.