Buy off-the-shelf software when a product already does what your process needs and that process isn't what sets your business apart. Build custom software when your way of working is genuinely different and no existing product or marketplace app handles it properly. For most Australian small and mid-sized businesses, the answer is both. Keep Xero or MYOB for the accounts, use standard tools wherever they fit, and build only the missing piece that connects to them.
The rest of this post is a practical checklist to help you work out which side of the line each part of your business sits on.
Buy the standard, build the different
Most of what a business does is not unique. Paying bills, raising invoices, running payroll, lodging BAS and reconciling the bank work much the same everywhere. Xero, MYOB and the apps built around them handle these tasks well. They're maintained by large teams and updated when tax rules change. Rebuilding any of that from scratch rarely makes sense.
The trouble starts in the gaps. These are the jobs that are specific to how you operate:
- the way you quote
- how you cost a job
- how stock moves through your site
- how approvals happen
- how you report to a parent company or a client
That's usually where the spreadsheets live. It's also where off-the-shelf products force you to bend your process to suit the software, or to buy a much bigger system than you need.
So the useful question isn't "custom or off-the-shelf?" for the whole business. It's "which parts are standard, and which parts are genuinely ours?"
A practical checklist before you decide
Work through these questions for the specific process you're trying to fix, not the whole business at once.
1. Is your process genuinely different?
Be honest here. Many businesses believe their process is unique when it's really just undocumented. If your process is different because it gives you an advantage, that's a reason to build. Examples include a faster quoting method, a costing approach your competitors can't match, or a compliance requirement specific to your industry. If it's different only because "that's how we've always done it", fix the process first. Software won't solve that for you.
2. Does a marketplace app already do the job?
Before building anything, check the Xero and MYOB app marketplaces and the established products in your industry. If an app covers most of what you need, the sensible move is usually to adopt it and adjust slightly. Custom work makes sense when you've genuinely looked and the options are either a poor fit or a much larger system than you need.
3. Will it work with Xero or MYOB?
Whatever you choose, it needs to talk to your accounting system. An off-the-shelf product with a weak or one-way integration can leave you re-keying data, and that's often the reason you started looking in the first place. Custom software can be built to connect directly through the Xero API or MYOB API, so invoices, bills, jobs and contacts flow across without double entry.
4. Who maintains it?
Off-the-shelf software is maintained by the vendor. You pay a subscription, and updates happen whether you want them or not. Custom software needs someone to look after it: fixing bugs, keeping integrations working when Xero or MYOB change their APIs, and making changes as your business evolves. Before you commit, know who that person or company is. Make sure the software is documented well enough that someone else could pick it up.
5. Who owns the code and the data?
With a subscription product, the vendor owns the software and you rent access. Your data is usually exportable, but check how easily. With custom software, make sure your agreement says you own the code and the data, and that you'll receive the source code. Otherwise you can end up locked in to a single developer.
The hybrid option: keep Xero or MYOB, build the missing piece
This is where most of our work ends up. Rather than replacing your accounting system or buying a large ERP, you keep Xero or MYOB doing what it does well. You then build a focused tool for the one area that doesn't fit.
For example, if your team tracks job costs in a shared spreadsheet and then re-types the totals into Xero, a small custom app could:
- capture costs at the source
- apply your costing rules
- push the results into Xero automatically
Your accountant keeps working in Xero as normal. The spreadsheet disappears and nobody has to learn a whole new system.
This approach has a few practical advantages:
- Smaller scope. You're building one piece, not an entire platform.
- Less disruption. Staff keep the tools they already know for everything else.
- Lower long-term risk. The accounting system stays standard and supported, and your accountant or bookkeeper can still work with it.
If spreadsheets are the main pain point, our spreadsheet replacement service covers this in more detail.
When fully custom software is the right call
Sometimes nothing on the market fits. Two of our own long-running projects show what that looks like.
Since 2012 we've built and maintained a port management system for Australian forestry companies exporting woodchip. Since 2015 it has received ticket data from the weighbridge system. The workflows, from truck arrivals and weights to stockpiles and shipments, are specific enough that no general product handled them well. You can read more in the forestry export and weighbridge project.
Since 2014 we've also run a purchase order approval system for a large retirement living provider. Their approval rules and structure didn't fit the generic options, so a purpose-built system made more sense.
The common thread is a core process that was central to the business, specific to how it operated, and used every day. That's when building pays its way. If you're at that point, our custom software development page explains how we approach it.
What does custom software cost?
Costs vary widely depending on the size of the business, how many systems are involved and how much needs to be custom-built. That's why we scope every project first and give you a fixed quote after a free initial chat.
If you'd like a thorough, written picture of your processes and systems before deciding anything, our $5,000 Process & Systems Audit maps how work actually flows through your business. It then shows where standard software fits and where a custom piece would make a real difference.
Frequently asked questions
Is custom software only for large businesses?
No. Small and mid-sized businesses often benefit most from the hybrid approach. You keep affordable standard tools like Xero or MYOB and build one focused piece where a spreadsheet or manual workaround is holding you back.
Will custom software replace Xero or MYOB?
In almost every case, no. Xero and MYOB are well suited to accounting, tax and compliance. Custom software usually sits alongside them and handles operational work such as job costing, approvals or stock, then sends the financial results back into your accounts.
What if a marketplace app does most of what we need?
Then start with the app. If it covers most of your process, adjust how you work slightly and use it. Custom work only makes sense when the gap is significant and affects work your team does every day.
What happens if the developer who built our software disappears?
That risk is why ownership and documentation matter. Make sure you own the source code and data, and that the system is documented so another developer could support it. Ask about this before any work starts.
If you're weighing up custom software against an off-the-shelf product and want a straight answer about which fits your situation, book a free initial chat. It's a no-obligation conversation with Aaron, and you'll come away knowing whether to buy, build or do a bit of both.