# How Much Does Custom System Development Cost?

> Taiwan's small-to-mid custom system projects mostly cost NT$300,000-2,000,000. Four cost variables and a formula to estimate your own budget tier.

- URL: https://noise-and-signal.com/en/insights/custom-system-development-cost-formula
- Author: 翁睿承 (諾訊科技 Noise & Signal)
- Published: 2026-09-17
- Updated: 2026-09-20
- Tags: Custom Software, Cost & Pricing
- Language: en

---
How much does custom system development cost? There's no single number, but Taiwan's small-to-mid projects mostly fall between NT$300,000 and NT$2,000,000. That range isn't vendors pricing randomly — a handful of variables behind the quote determine the final figure, and you can estimate a budget tier yourself with one formula before a quote ever lands in your inbox.

## Why Can Two Quotes for the Same Request Differ by Two or Three Times?

Quote gaps usually don't come from "who's more expensive" — they come from differences in scope:

| Variable | Effect on the quote |
|---|---|
| Number of feature modules and permission tiers | More screens and logic means work hours scale up linearly |
| Whether it integrates with existing systems (ERP, payments, IoT) | Most easily underestimated — testing and debugging costs run high |
| Expected scale of use (concurrent users, data volume) | Affects architecture decisions, which drives upfront investment |
| Whether the quote includes post-launch maintenance | If it doesn't, that cost will surface later |

Before comparing two quotes' totals, confirm the four items above are apples-to-apples — otherwise, no matter how close the numbers look, the comparison is meaningless. This is also why Taiwan's [Government Software Procurement Platform](https://gsmarket.adi.gov.tw/portal/%E8%B3%87%E8%A8%8A%E6%9C%8D%E5%8B%99%E6%8E%A1%E8%B3%BC/%E9%87%8D%E8%A6%81%E6%B3%95%E8%A6%8F) directs agencies procuring information services under Article 22(1)(9) of the Government Procurement Act to use fixed service fees or rates — define scope and pricing basis first, then compare totals, a principle worth borrowing for private vendor comparisons too.

![Stacked bar chart of the four cost components in custom system development](https://noise-and-signal.com/images/insights/custom-system-cost-stack.svg)

## A Simple Formula to Estimate Your Own Budget Tier

You don't need to wait for a vendor's quote to get a budget tier in mind: **Estimated budget = number of core feature modules × average hours per module × team hourly rate, plus a 10-30% buffer.** For example, a project with 5 core modules, roughly 60 hours per module, and an hourly rate around NT$1,000 lands in the ballpark of NT$1,000,000 — enough to walk into a vendor conversation mentally prepared, instead of seeing a number for the first time right before signing.

## A 50-Person Company's Decision (Illustrative Scenario)

Imagine a 50-person trading company that originally just wanted the lowest-quoted team to build a quotation system. They later discovered maintenance costs weren't included in the quote, and the add-on fees six months after launch ended up exceeding what they thought they'd saved. After re-comparing quotes using the module breakdown above, they realized the real comparison point was "scope covered," not "total number" — and ultimately chose the team with a slightly higher quote but the clearest scope. This scenario comes up repeatedly in our discovery interviews; only the company size and system name change.

## Where Does Noise & Signal Sit in This Pricing Spectrum?

Noise & Signal (諾訊科技) is a Taipei-based [custom system development company](https://noise-and-signal.com/en/services/custom-software) that also builds AI agents. Typical SME project quotes range from NT$300,000 to NT$2,000,000; an MVP usually launches in 6-12 weeks, and a full system in roughly 3-6 months. We quote in phases after a requirements interview, with maintenance billed separately. If your project has already reached the scale of needing multi-country teams delivering in sync, this tier isn't the right starting point — you'll want a vendor with large-scale global delivery experience instead.

If you'd like a quick price and timeline range for your own project, try our online tool: [Project Cost Estimator](https://noise-and-signal.com/en/estimate).

## References

- [Information Service Procurement Regulations](https://gsmarket.adi.gov.tw/portal/%E8%B3%87%E8%A8%8A%E6%9C%8D%E5%8B%99%E6%8E%A1%E8%B3%BC/%E9%87%8D%E8%A6%81%E6%B3%95%E8%A6%8F) — Government Software Procurement Platform, Administration for Digital Industries, Taiwan

## FAQ

### What's the fee most often left out of a quote?

Post-launch maintenance is the most commonly omitted line item — always ask directly whether it's included in the total price.

### How much buffer should I add to my budget?

A common rule of thumb is 10-30% on top of your estimate, to absorb scope adjustments once requirements are clarified.

### How much longer does a full system take compared to an MVP?

An MVP typically launches in 6-12 weeks; a full-featured system usually takes 3-6 months.

### Can I just pick the vendor with the lowest quote?

We don't recommend comparing on total price alone — confirm first whether the scope covers testing and maintenance, or you risk add-on charges after launch.

### When does it make sense to start with a small pilot?

When requirements are still unclear, or you want to validate a single process first, a small pilot is a good way to start before expanding the engagement.