How much does custom software cost in Singapore?

Custom software is built to fit a particular business, so projects with the same name, say “an inventory system”, can differ enormously in what they need to do. A price quoted before anyone understands the work is either padded to cover the unknowns or wrong. Neither helps you.

What helps is knowing which things drive the cost, so you can decide what really matters on day one, compare quotes sensibly and spot a scope that has grown without anyone saying so. Those drivers are below.

• Scope. How many screens, steps and rules the system has. A tool that does one job well is a different size of project from one that runs the whole business. Scope is the biggest lever, and the one you control most.
• User roles. One person entering data is simple. Several roles, such as sales, warehouse, drivers, managers and customers, each seeing different things and approving different steps, add design, permissions and testing.
• Integrations. Connecting to accounting software, payment providers, marketplaces, messaging or an older database. Some products have clean, well-documented APIs; others are awkward, and the difference shows in the effort.
• Data migration. Moving customers, products, stock and history out of spreadsheets or an old system. Tidy data moves quickly; duplicated, inconsistent data has to be cleaned first.
• Platforms. A web app that works in any browser is the leanest option. An installable phone app adds work, and separate iOS and Android apps in the app stores add more, including store reviews and ongoing updates.
• Design depth. A clean, standard interface is efficient to build. A fully bespoke look, custom illustrations or complex animations take design rounds. Both are valid; it is a choice.
• Compliance and security. Personal data under the PDPA means deciding what to collect, who can see it, how long to keep it and how people opt out. Sensitive data, audit trails and stricter access control add work, and they are worth doing properly.
• Hosting and maintenance. Software keeps costing something after launch: cloud hosting, paid services it uses, security updates, and small changes as your business moves. Ask for these to be estimated alongside the build.
• Fixed scope or phased. How the work is agreed changes the price as well as the risk. More on that next.

A fixed-scope project agrees everything up front: every screen, every rule, one price. It feels safe, but only if the scope is genuinely known. Most businesses discover what they need by using the first version, so a fixed scope either carries a buffer for changes, or turns every new idea into a change request.

A phased project agrees a small first version in detail and prices it, then plans the next stages once people have used it. Each stage is quoted before it starts, so you always know what you are committing to, and you can stop at any point with working software.

For most SMEs, phased is cheaper overall and produces a better system, because the money goes on what people actually use.

• Start with the most painful step. The one spreadsheet everyone fights over, or the job that is retyped every day. Fixing that pays back first.
• Leave the nice-to-haves for later. Reports, dashboards and edge cases are easier to get right once real data is flowing.
• Use what you already have. Keep your accounting software and other tools that work, and connect to them rather than rebuilding them.
• Prefer a web app first. It runs on every phone and laptop from one codebase; app-store apps can come later if they are really needed.
• Learn before you scale. Each stage is shaped by how the last one was used, so nothing expensive is built on a guess.

• A few lines on the problem: what is slow, error-prone or annoying today.
• Who would use the system, and what each of them needs to do.
• The tools you already use and want to keep, such as accounting software or a web shop.
• Samples of what you work with now: the spreadsheet, the form, a photo of the whiteboard.
• What would make the first version a success, in your own words.

Rough is fine. Working out the details is part of scoping, and a good developer will ask the questions.

When you have more than one quote, compare the scope before the price. Check that each one covers the same roles, integrations and data migration, says what happens after launch, states who owns the code and where it is hosted, and explains how changes are priced. A low quote that leaves out data migration or support is not cheaper.

If you want a second opinion on a quote, including one from another company, that is part of our IT consulting. If you are still deciding whether to build at all, read off-the-shelf or custom software first.

Some software projects may qualify for support under Enterprise Singapore’s EDGE grant, which has its own rules on eligibility, vendors and timing, and requires you to apply before any work starts. GeekScience is not a pre-approved vendor and does not apply on anyone’s behalf, and no grant outcome can be promised. Our EDGE grant explainer sets out what the official pages say.

The quickest way to a real number is a short conversation about your actual problem. Email us a few lines about what you need, and we will reply with questions, then a written scope and estimate for a sensible first version before any work starts.

• Custom software What we build and how we work.
• Off-the-shelf or custom? Whether to build at all.
• EDGE grant explainer What the grant says about software projects.
• FAQ Timelines, who owns the code and more.