PAYG Instalments in Australia – What They Are, How They Work & Who Must Pay

PAYG (Pay As You Go) Instalments are regular prepayments of income tax made by businesses and sole traders to the Australian Taxation Office (ATO). Rather than waiting until tax time, you pay as you earn throughout the year.

At Ozobooks, we track, calculate, and lodge PAYG instalments so you avoid large tax bills at EOFY and stay ahead of ATO obligations.

Who Needs to Pay PAYG Instalments?

You may be required to pay PAYG instalments if:

• You earn business or investment income over the ATO threshold
  
• You receive a letter or BAS notice from the ATO
  
• You’re a sole trader, company, trust, or partnership with taxable income
  

How PAYG Instalments Work

You typically pay either:

• A fixed quarterly amount set by the ATO
  
• A percentage of your income (instalment rate method)
  

Instalments are reported and paid through your Business Activity Statement (BAS).

PAYG Instalment Example

If your estimated annual tax is $8,000:

• You might pay $2,000 per quarter (fixed method), or
  
• 15% of your actual business income each quarter (rate method)
  

PAYG Instalments vs PAYG Withholding

Feature	PAYG Instalments	PAYG Withholding
Purpose	Prepay your own income tax	Deduct tax from employee payments
Applies to	Sole traders, companies, trusts	Employers
Paid via	BAS	Payroll/STP

What If You Overpay or Underpay?

• Overpayment: Refunded or credited in your annual tax return
  
• Underpayment: You may need to pay a top-up at EOFY, possibly with interest
  

How Ozobooks Helps

• Tracks if you meet PAYG instalment thresholds
  
• Chooses the best method for your cash flow
  
• Prepares and lodges instalment amounts through BAS
  
• Provides reminders before each due date
  
• Reconciles instalments with annual income tax
  

FAQ:

Q1: Do I need to register for PAYG Instalments?
No. The ATO usually notifies you when you need to start.

Q2: Can I vary my PAYG instalment amount?
Yes. If your income or profits change, Ozobooks can help you adjust it.

Q3: Are PAYG Instalments tax-deductible?
No, but they are credited against your end-of-year tax bill.

Q4: Do companies have to pay PAYG instalments?
Yes. All entity types can be subject to PAYG instalments.