How to Set Up Xero or MYOB Correctly From the Start (And Why It Matters for Your BAS)

Setting up Xero or MYOB correctly from the start is one of the most important things an Australian small business can do for its financial records - and one of the most commonly skipped.

Most business owners open an account, connect their bank feed, and start coding transactions without realising that the decisions made in the first few hours of setup flow through to every BAS, every payroll run, and every report the business produces from that point forward.

A poorly set up file does not break immediately. It causes small errors that accumulate quietly - GST coded incorrectly, payroll categories missing super, bank accounts not reconciling cleanly - until BAS time arrives and the numbers do not add up.

This article explains what correct Xero or MYOB setup looks like, where businesses most commonly get it wrong, and why getting it right from the start saves significant time and money down the track. For advice on your specific tax or compliance settings, speak with your accountant.

Why Correct Setup Matters More Than Which Software You Choose

The Xero versus MYOB debate is a common one for Australian small businesses. Both are strong platforms. Both are ATO-compliant and support Single Touch Payroll, BAS lodgement, and bank feeds.

But the software choice matters far less than the setup quality.

A correctly set up MYOB file will produce more accurate BAS figures than a poorly configured Xero file every time. The platform is just a tool. How it is configured determines whether the numbers coming out of it are reliable.

This is why so many businesses that switch from one platform to the other discover that their problems follow them. The software was not the issue. The setup was.

The Key Setup Decisions That Affect Everything Downstream

1. GST settings and tax codes

This is the most consequential setup decision for BAS purposes.

Every transaction in Xero or MYOB is assigned a tax code that tells the software whether GST applies, whether it is GST-free, input-taxed, or out of scope. If the default codes on your accounts are wrong, every transaction coded to those accounts will carry the wrong GST treatment.

Common GST setup errors include:

• Bank fees coded as taxable when most Australian bank fees are input-taxed

• Insurance coded without GST when most business insurance does include GST

• Purchases from overseas suppliers coded as taxable when they are typically GST-free

• Mixed supplies not split correctly between taxable and GST-free components
  

These errors do not show up obviously. They quietly inflate or deflate your GST credits or liabilities every quarter until a reconciliation or ATO review reveals the discrepancy.

Your accountant should confirm the correct GST treatment for your most common transaction types before setup begins - then your bookkeeper can configure those codes correctly in the software. 2. Chart of accounts

The chart of accounts is the list of categories used to classify every income and expense in the business. In both Xero and MYOB, a default chart of accounts is provided when you set up a new file.

The default chart is a starting point, not a finished product. For most businesses it needs to be customised to reflect how the business actually earns and spends money.

Common chart of accounts problems include:

• Too many accounts making it difficult to find the right category quickly, leading to inconsistent coding

• Too few accounts providing insufficient detail for useful reporting

• Accounts with the wrong GST treatment built in as the default

• Personal expense accounts mixed in with business accounts

  Accounts that made sense when the business was smaller but no longer reflect how it operates
  

A well-structured chart of accounts makes bookkeeping faster, reduces coding errors, and produces reports that actually tell you something useful about the business.

3. Bank feed connections

Xero and MYOB both connect directly to Australian bank accounts and import transactions automatically. This is one of the most useful features of modern accounting software - but only if the connections are set up correctly.

Common bank feed setup issues include:

• Multiple bank accounts for the same account imported separately, causing duplicates

• Opening balances entered incorrectly, meaning the bank reconciliation starts from a wrong figure

• Credit card accounts not connected, requiring manual entry

• PayPal, Stripe, or other payment platform feeds not set up, creating gaps in income records
  

If the opening balance in the software does not match the actual bank balance on the start date, the reconciliation will never balance correctly. This is one of the most common causes of ongoing bookkeeping problems in small business files.

4. Payroll setup

If you have employees, payroll setup is where incorrect configuration causes the most downstream damage - because errors flow through to STP reporting, BAS PAYG figures, super calculations, and employee pay records simultaneously.

Key payroll setup areas that need to get right from the start:

• Correct pay items set up for each type of payment - ordinary hours, overtime, allowances, leave

• Super correctly applied to the right pay items at the right rate

• Tax treatment codes correct for each employee

• Leave entitlements configured correctly - annual leave, personal leave, long service leave

• STP enabled and connected correctly to the ATO
  

If payroll is set up incorrectly, the errors compound with every pay run. Fixing twelve months of incorrectly configured payroll is significantly more work than getting it right at setup.

For advice on which pay items should attract super or how specific employee types should be configured for tax purposes, speak with your accountant before setting up payroll.

5. Opening balances

If you are moving to Xero or MYOB from another system - or from a spreadsheet - the opening balances entered at setup need to be accurate.

Opening balances include:

• Bank account balances on the conversion date

• Accounts receivable - what customers owe you

• Accounts payable - what you owe suppliers

• GST balances - what you have already collected or paid before conversion

• Payroll balances - year-to-date figures for each employee if converting mid-year
  

Incorrect opening balances create reconciliation problems that persist for the life of the file. Getting these right, ideally with your accountant confirming the figures, is worth the time investment at the start.

The Most Common Setup Mistakes Australian Small Businesses Make 

Setting up the file themselves without a bookkeeper or accountant review

Both Xero and MYOB are designed to be accessible to non-accountants. This is one of their strengths and one of the reasons so many files end up incorrectly configured.

The setup process is intuitive enough that most business owners can get through it without obvious errors. But intuitive does not mean correct. GST codes, payroll settings, and chart of accounts decisions require bookkeeping knowledge to get right.

Rushing setup to start processing transactions quickly

Setup is the one part of bookkeeping where speed works against you. Decisions made in the first hour of setup can cause problems for years. Taking the time to configure things correctly - or engaging a bookkeeper to do it properly - pays for itself quickly.

Not reviewing the setup after the first BAS

Even a well-intentioned setup can have errors that only become visible once real transactions start flowing through. The first BAS preparation is an important checkpoint - the figures should be reviewed carefully and any discrepancies investigated before assuming the setup is correct.

Migrating from another system without cleaning up historical data first

If you are moving to Xero or MYOB from an older system, the temptation is to import historical data as-is. But if the historical data has errors, those errors come with it. In many cases it is cleaner to start fresh from a specific date and enter only opening balances, rather than carrying across years of potentially messy historical records. 

Xero or MYOB: Which Is Right for Your Business? 

Both platforms are widely used by Australian small businesses and are supported by the ATO for BAS lodgement, STP, and payroll.

A few general observations - though your bookkeeper and accountant are better placed to advise based on your specific circumstances:

• Xero tends to suit businesses that want a clean, modern interface, strong bank feed integration, and easy collaboration with a bookkeeper or accountant who works remotely. It has a large ecosystem of add-on apps that integrate well.

• MYOB tends to suit businesses that prefer more detailed payroll features built in, businesses in industries with specific MYOB-compatible integrations, or businesses whose accountant already works primarily in MYOB.
  

The most important factor is often which platform your bookkeeper or accountant works in regularly - because their familiarity with the software directly affects the quality and efficiency of the work they do in your file.

Getting Set Up Right With Professional Help 

The cost of a professional bookkeeper setting up your Xero or MYOB file correctly is almost always less than the cost of fixing a file that has been running incorrectly for six or twelve months.

Problems that stem from poor setup - incorrect BAS figures, unbalanced reconciliations, payroll errors, incorrect super calculations - all take time to unwind. And the longer they run, the more time they take to fix.

Getting it right at the start is the most cost-effective approach.

We Can Help You Set Up or Fix Your Xero or MYOB File 

At Bookkeeping On Time, we help Australian small business owners set up Xero and MYOB files correctly from the start - or clean up files that have been running with setup errors.

We can help you:

• Configure your chart of accounts correctly for your business type

• Set up GST codes and tax treatments in line with your accountant's advice

• Connect bank feeds and enter accurate opening balances

• Set up payroll correctly for your employees and pay structures

• Review an existing file and identify setup errors that are affecting your BAS or payroll

We work alongside your accountant to make sure your software is configured correctly and your records are accurate from day one.

If you are setting up Xero or MYOB for the first time, or you suspect your current file has setup issues, get in touch with us today.

Talk to Bookkeeping On Time

Frequently Asked Questions About Xero and MYOB Setup 

Should I use Xero or MYOB for my Australian small business?

Both are strong platforms and both are ATO-compliant. The best choice depends on your industry, the size of your team, and which platform your bookkeeper or accountant works in. Speak with your bookkeeper before committing - their familiarity with the software matters as much as the features.

Can I set up Xero or MYOB myself?

Yes, but it is worth having a bookkeeper review the setup before you start processing transactions. GST codes, payroll settings, and chart of accounts decisions made at setup affect the accuracy of every BAS and payroll run that follows. A setup review is far cheaper than fixing months of errors later.

What is a chart of accounts and why does it matter?

The chart of accounts is the list of categories used to classify every transaction in your business. If it is set up incorrectly - wrong GST codes, wrong account types, or categories that do not match how your business operates - your financial reports and BAS figures will be unreliable. It should be customised for your business, not left as the software default.

How do I connect my bank account to Xero or MYOB?

Both platforms support direct bank feeds from most major Australian banks. You connect through the software settings and authorise the feed through your bank. The key is making sure opening balances match your actual bank balance on the start date, and that all accounts - including credit cards and payment platforms - are connected. 

What happens if my Xero or MYOB setup has errors?

Errors in the setup flow through to BAS figures, payroll calculations, and financial reports. Some errors are minor and easy to correct. Others - particularly around GST codes and payroll - can affect multiple periods and require careful unwinding. A bookkeeper can review your file and identify what needs to be corrected. Your accountant can advise on any compliance implications.

Can I move from MYOB to Xero (or vice versa) without losing my data?

Yes, though migration requires care. Historical data can be imported, but it is often cleaner to start a new file from a specific date with accurate opening balances rather than carrying across potentially messy historical data. A bookkeeper can help you plan the migration to minimise disruption.

How long does it take to set up Xero or MYOB correctly?

A basic setup for a simple sole trader business can take a few hours. A more complex setup with employees, multiple bank accounts, and industry-specific requirements takes longer. Doing it properly at the start - rather than rushing - is always the better investment.

Bookkeeping On Time supports Australian small business owners with Xero and MYOB setup, bookkeeping, BAS preparation, payroll, and catch-up projects. We work alongside your accountant to make sure your records are always accurate and ready. This article is general information only and does not constitute financial, tax, or legal advice. Please speak with your accountant for advice specific to your situation.