Xero API integration · Custom builds · Brisbane engineers
Xero Integration Developers for Australian Businesses
Stop re-keying invoices, payments and customers into Xero. Our Brisbane engineers build custom Xero API integrations that connect your accounting to the CRM, online store, job system or custom software you already run, with GST, tracking categories and reconciliation handled properly.
Free 30-minute engineer chat
Scoping from $1,200 ex. GST

Xero work in nearly every project we build
Two-way sync with logging and alerts
GST and BAS-aware mapping
You own the code
What we build
Custom Xero integrations, built in Brisbane
Xero’s app marketplace covers the common jobs. When your process doesn’t fit an off-the-shelf app, we build the connection around your business rules instead of bending your business to fit the app.
Invoices, bills and credit notes
Create Xero invoices, bills and credit notes automatically from orders, jobs, bookings or timesheets, with the right accounts, tax rates and tracking categories on every line.
Payments and reconciliation
Apply payments from Stripe, your payment gateway or your own platform to the right invoices, with fees and refunds posted correctly, so bank reconciliation becomes a quick tick-off.
Contacts and customers
Keep customers and suppliers identical in Xero and your CRM, with duplicate matching so your contact list stays clean on both sides.
Items and inventory
Sync products, item codes, prices and stock-on-hand between Xero and your online store, warehouse or ERP.
Payroll and timesheets
Send approved timesheets and leave from your rostering or job system into Xero Payroll, ready for your pay run and Single Touch Payroll reporting.
Custom reporting
Combine Xero data with sales, operations or practice data for dashboards and management reports that Xero can’t produce on its own.
Multiple organisations and currencies
Report across several Xero organisations, or handle foreign-currency invoices and payments, without a spreadsheet in the middle.
Xero in your own software
Building a platform of your own? We add Xero connectivity using Xero’s secure OAuth 2.0 sign-in, so each of your customers connects their own organisation.

How it works
How a Xero integration project runs
Accounting data has to be right, so we spend the time up front on the rules, then build and test where mistakes can’t reach your live books.
01
Map the money flow
We work through it with you, and ideally your bookkeeper or accountant: which system owns each record, which accounts, tax rates and tracking categories apply, and what should happen with deposits, part payments, refunds and credit notes.
02
Fixed-price scope
You get a plain-English scope and an estimate for the build. Scoping and design is a fixed price from $1,200 ex. GST, and the build is quoted milestone by milestone.
03
Build against a safe test organisation
We develop against a Xero demo company or a test copy of your setup, never your live books, and test the awkward cases: GST-free items, rounding, refunds and failed payments.
04
Go live and keep it running
We release with logging, alerts and a sync history you can check, work within Xero’s API limits, and monitor the integration as Xero and your other systems change.
App or custom?
Xero app or a custom Xero integration?
There are hundreds of ready-made apps that connect to Xero, and for plenty of businesses one of them is the right answer. Custom work earns its keep when the data matters, the volume grows or your process doesn’t match the template.
Off-the-shelf
Apps from the Xero App Store
Quick to switch on when both systems are popular and your process is standard.
- Fast to set up for common pairings
- A monthly fee per app, often rising with users or transactions
- Works the app’s way, not yours
- Summarised entries can be hard to trace back to the source
- Another vendor and login to manage
Custom
A custom Xero integration
Built around your chart of accounts, your systems and the way your team actually works.
- Mapped to your accounts, tax rates and tracking categories
- Handles deposits, part payments, refunds and other exceptions
- Two-way sync with retries, logging and alerts
- No per-transaction fees
- You own the code from day one
Not sure which you need? Bring your current setup to a free chat. If an existing Xero app will do the job, we’ll tell you and help you set it up properly. More on our system integration services.
Connect Xero to everything else
Xero integrations for the systems Australian businesses run
Most of the Xero work we do is connecting it to the system where the sale, job or booking actually happens.
E-commerce
Shopify and WooCommerce to Xero
Orders, payouts, gateway fees and refunds posted to Xero automatically, with GST that matches your BAS.
CRM
HubSpot to Xero
Won deals become invoices, and payment status flows back to your sales team, so nobody chases a customer who has already paid.
Allied health
Nookal and practice software
Practice billing, funding sources and payments lined up with your accounts, built by a Nookal N.I.C.E. List Partner.
Operations
Job, booking and custom systems
Field service, booking, freight or your own software, invoicing straight into Xero the moment the work is done.
Pricing
How we price Xero integration work
No hourly billing and no surprise invoices. You know what you’re building, and roughly what it will cost, before development starts.
$0
Free consultation
A 30-minute chat with an engineer about the systems involved and the manual work you want to stop doing. No pitch, and a mutual NDA on request.
From $1,200 ex. GST
Fixed-price scope and design
We map your accounts, tax rates, systems and business rules, then give you a plain-English scope and an estimate for the build.
Quoted
Milestone-based build
The build is estimated milestone by milestone, and nothing changes without your approval. After launch, support and monitoring are month to month.
Client stories
What our clients say
Emma
Fliit
“Code Squirrel effortlessly understood our requirements and delivered exceptional outcomes. We now have our systems integrated removing hours of data entry and improving our management reporting capabilities. The team are great to deal with, transparent, responsive and highly skilled.”
Tracie
Marketing 2aT
“I have worked with David Swinton and his team for over 6 years. They have delivered above expectations on every project I’ve thrown at them, including a tailor made database to manage information and reporting. That project enabled the client company to bid for tenders in a fraction of the time and delivered measurable improvements in data integrity supporting an uplift in sales. I will continue to go to the team of Code Squirrel for all my software development and web projects with the peace of mind that their expertise is next level.”
FAQ
Xero integration questions, answered
Can you integrate Xero with our CRM, online store or custom software?
Yes. If a system has an API, an export or a database, we can almost certainly connect it to Xero. We regularly connect Xero with CRMs such as HubSpot, online stores such as Shopify and WooCommerce, practice management software such as Nookal, and custom-built platforms.
Why not just use an app from the Xero App Store?
Often you should. If a ready-made app fits your process, it’s usually the quickest and cheapest option, and we’ll tell you so. A custom integration earns its keep when you need your own business rules, higher volumes, two-way sync or better error handling than an app provides.
How much does a Xero integration cost?
The first consultation is free. Scoping and design is a fixed price from $1,200 ex. GST, and you’ll get an estimate for the build before development starts. The build itself is quoted and delivered in milestones you sign off.
How long does a Xero integration take?
A simple one-way sync, such as creating invoices from orders, can be live in days. Larger two-way integrations are delivered in milestones, and our typical time to a first release is around four weeks.
Will it handle GST and BAS correctly?
Yes. We map every line to the right Xero tax rate, including GST-free items, and test rounding against real examples, so the GST in Xero matches your sales system and your BAS. We’re happy to work alongside your accountant or bookkeeper during scoping.
Is our financial data secure?
The integration connects through Xero’s OAuth 2.0 sign-in with only the access it needs, credentials are stored securely, and every sync is logged. We can host it in Australia or on your own infrastructure, and a mutual NDA is offered up front on every engagement.
What happens when Xero or our other systems change?
Software updates are the most common reason integrations break. We build in logging and alerts so problems surface quickly, and we can monitor and maintain the integration month to month. You own the code, so there’s no lock-in.
Let’s stop re-keying into Xero.
Book a free 30-minute chat with an engineer. Bring the spreadsheet or report your team copies into Xero, and we’ll show you what an integration could take off their plate.

