---
type: Static
title: What will it cost to build?
description: Answer seven questions and see the range a project like yours usually costs. No email required, and the numbers come from work we have delivered.
resource: https://nationaldigital.com.au/estimate/
tags: []
timestamp: '2026-08-26T00:00:00.000Z'
---

# What will it cost to build?

Answer seven questions and see the range a project like yours usually costs. No email required, and the numbers come from work we have delivered.

Seven questions, an honest range, and no email address required to see it.

## Estimate your project

Nothing here is stored against your name, and no one will call you because you used it.

## What drives the cost of a custom build

Cost on a custom build is driven by what it integrates with, whether it replaces an existing system, how many people use it, and how fast it has to ship. The estimator below asks about each of those and returns the range a project like yours usually lands in.

- **Integrations are the largest single source of estimate error, not screen count.** What a system has to talk to, and what those systems will actually allow, is where most estimates go wrong. An in-house or legacy system is usually the hardest part of any build.
- **Replacing something costs more than building it new, because of migration.** Moving existing data across and running both systems in parallel long enough to trust the new one is real work, and it is routinely left out of the number people first hear.
- **A compressed deadline raises the price because it takes more people, not fewer weeks.** Delivery can be shortened, but past a point the only lever is parallelism, and coordination cost rises with every person added to the same piece of work.
- **A range is honest at this stage; a precise figure before scope is written is not.** What narrows a range is a planning phase that settles requirements, the data model and the integration contracts. Anyone quoting to the dollar beforehand is guessing at you rather than for you.

Most agencies will not talk about money until you have had a meeting. That is a reasonable position for them and a frustrating one for you, because the first thing you need to know is whether this is a $30,000 problem or a $300,000 one — and you need to know it before you spend an hour on a call finding out.

So here is the estimator we would otherwise be running in our heads on that call. The ranges are the same figures we publish on the pages for each kind of work — [custom software](/digital-product-development/), [booking systems](/digital-product-development/booking-and-scheduling-systems/), [AI automation](/ai-automation/) — and they are what we quote from, and the questions are the ones that actually move a number: what you are building, whether it replaces something, who uses it, how big it is, what it has to talk to, and when it has to be live.

It will not be exact. Nothing is exact before the scope is written, and anyone who gives you a precise figure at this stage is guessing at you rather than for you. What it will be is honest about the range and honest about what drives it.

## Related

**Related:**
- [National Digital - Custom Software, AI & Platforms](/okf/home.md)
- [Talk to an engineer.](/okf/contact.md)
- [Careers at National Digital](/okf/careers.md)
- [Graduate Full-Stack Web Developer](/okf/australia-remote-graduate-full-stack-developer.md)
- [Senior Software Engineer (Frontend)](/okf/australia-remote-senior-software-engineer-frontend.md)
- [Senior Software Engineer (Backend)](/okf/australia-remote-senior-software-engineer-backend.md)
- [Privacy Policy](/okf/privacy.md)
- [Website Terms of Service](/okf/terms.md)
- [Accessibility Statement](/okf/accessibility.md)
- [Small team. Serious platforms.](/okf/about.md)
- [Real platforms, in production.](/okf/case-studies.md)
- [Senior engineering, end to end.](/okf/services.md)
- [Knowledge library.](/okf/expertise.md)
- [QA & Test Automation Engineer](/okf/australia-remote-qa-automation-engineer.md)
- [Governance and Credentials](/okf/governance.md)
- [Information Security and Privacy Statement](/okf/governance/information-security-and-privacy.md)
- [Quality Policy](/okf/governance/quality-policy.md)
- [Work Health and Safety Policy](/okf/governance/work-health-and-safety-policy.md)
- [Environmental Policy](/okf/governance/environmental-policy.md)
- [Product and Development Plan](/okf/services/product-development-plan.md)