The Short Answer
Custom software in New Zealand costs anywhere from $399 to $500,000+. That's not a helpful range, so let's break it down by what you actually get.
If you're a small business owner Googling "custom software cost NZ" at 11pm because your current systems are driving you crazy — this guide is for you.
The Traditional Route: $20,000–$500,000+
Most NZ software agencies quote $20,000 to $80,000 for a basic custom application. Complex systems (think multi-user platforms, integrations with accounting software, mobile apps) easily hit $150,000–$500,000.
Here's what that typically includes:
- Discovery & scoping: 2–4 weeks, $5,000–$15,000
- Design & UX: 2–4 weeks, $8,000–$20,000
- Development: 8–16 weeks, $40,000–$200,000+
- Testing & deployment: 2–4 weeks, $5,000–$15,000
- Ongoing maintenance: $500–$3,000/month
Timeline: 3–6 months minimum. Often longer.
For enterprise businesses with complex needs, this makes sense. But if you're a tradie who needs a quoting tool, or a salon owner who wants automated booking reminders — this is overkill.
The SaaS Alternative: $30–$300/month
Before going custom, most business owners try off-the-shelf software:
- Fergus (trades job management): ~$50–$150/month
- Timely (salon booking): ~$30–$80/month
- Xero (accounting): ~$30–$80/month
- Jobber (field service): ~$50–$200/month
These work well for what they do. But here's where NZ small businesses get stuck:
- You need features from 3 different tools — and they don't talk to each other
- Your workflow is slightly different — and the software forces you to change how you work
- You're paying for 50 features but only use 5 — and the pricing keeps going up
- NZ-specific requirements — GST calculations, NZ tax rules, local payment gateways
If existing SaaS covers 90% of your needs, use it. Don't go custom just because you can.
The New Middle Ground: $399–$2,000
This is the category we created at BestAI because we saw too many small business owners stuck between "too expensive" custom software and "doesn't quite fit" SaaS tools.
How it works:
- You tell us the ONE tool you need most
- We build it in 48 hours
- It costs $399 for a single-purpose tool
What You Get at $399
A focused, single-purpose business tool. Examples our clients have received:
- Quoting calculator — Enter job details, get a formatted quote PDF with your branding
- Booking reminder system — Automated SMS/email reminders that reduce no-shows
- Lead capture form — Smart form on your website that qualifies leads and notifies you instantly
- Inventory tracker — Simple stock management without paying for an enterprise system
- Client follow-up automation — Automatic check-in emails after job completion
What You DON'T Get at $399
Let's be honest about limitations:
- Not a full CRM or ERP system
- Not a mobile app (it's a web-based tool)
- Not a replacement for specialised industry software like Xero or MYOB
- Limited to one core function per tool
For anything more complex, our AI Workflow Design service ($490–$990 for the initial review) is the better path.
Cost Comparison Table
| Approach | Cost | Timeline | Best For |
|---|---|---|---|
| Traditional agency | $20,000–$500,000 | 3–6 months | Complex, multi-user enterprise systems |
| SaaS subscription | $30–$300/month | Immediate | Standard business needs with standard workflows |
| BestAI rapid tool | From $399 | 48 hours | One specific task that nothing else handles well |
| BestAI full setup | $2,000–$4,000 | 2 weeks | Automated workflows connecting multiple systems |
How to Decide What You Need
Ask yourself these questions:
- Can I describe my need in one sentence? If yes, a $399 rapid tool probably covers it.
- Do I need it to connect to other systems? (e.g., Xero, Google Calendar, your website) — That's a workflow automation project ($2,000–$4,000).
- Do multiple staff need different access levels? — You're moving into custom application territory ($10,000+).
- Is this a competitive advantage or just fixing a headache? — Headaches can usually be fixed cheaply.
The Hidden Costs Nobody Mentions
Whatever route you choose, budget for:
- Training time — Your team needs to actually use the thing
- Data migration — Moving from spreadsheets/paper to the new system
- Process changes — New software means new habits
- Ongoing updates — Business needs change, software needs to keep up
At BestAI, training and a step-by-step guide are included in every delivery. We don't just throw software over the wall.
What Auckland Small Businesses Are Actually Spending
Based on our conversations with NZ small business owners:
- Most common budget: $500–$5,000 for their first custom tool
- Most common need: Automating one repetitive task (quoting, booking, follow-ups)
- Biggest surprise: How much time they save — usually 5–10 hours per week
- Biggest regret: Waiting too long and losing business to competitors who automated first
Next Steps
If you're still reading, you probably have a specific problem in mind. Here's what to do:
- Write down the ONE task that wastes the most time in your business
- Book a free 45-minute chat — We'll tell you honestly whether a $399 tool, a full workflow setup, or even an off-the-shelf SaaS is the right answer
- No obligation — If we think Fergus or Timely would solve your problem, we'll tell you that instead
We're Auckland-based, we work with NZ small businesses every day, and we'd rather give you honest advice than sell you something you don't need.
BestAI is an Auckland-based custom software and AI automation company serving New Zealand small businesses. We build business tools from $399, delivered in 48 hours. Get in touch or see how it works.