One of the most common questions I hear from business owners is also one of the most stressful. How much tax should I actually be setting aside each quarter?
If you are running a small business, working as a sole trader, or managing multiple income streams, tax can feel unpredictable. Some quarters are strong, others are quieter, and the ATO does not always move at the same pace as your cash flow. Setting aside the wrong amount can leave you short when a BAS or tax bill arrives, while setting aside too much can starve your business of working capital.
The goal is not perfection. The goal is confidence. When you understand what tax applies to you and how to estimate it properly, quarterly tax planning becomes a lot calmer.
Why quarterly tax planning matters
Tax bills rarely arrive out of nowhere. They build up over time as income is earned, GST is collected, and profits are generated. The problem is that the cash used to pay tax is often spent long before the bill arrives.
Quarterly tax planning helps you:
- Avoid nasty surprises at BAS or year-end.
- Maintain steady cash flow.
- Make better business decisions.
- Sleep better at night.
It is not about guessing. It is about understanding your position and putting simple systems in place.
The main types of tax to plan for each quarter
Before working out how much to set aside, you need to know what tax applies to you. For most Australian small businesses, quarterly tax planning involves a combination of the following.
Income tax
This is a tax on your business profit. Profit is the amount remaining after allowable expenses are deducted from income. Income tax is usually paid annually, but it builds up throughout the year.
GST
If you are registered for GST, you are collecting tax on behalf of the ATO. This is not your money. GST needs to be accounted for in each BAS period.
PAYG instalments
Some businesses are required to prepay income tax through PAYG instalments. These are usually paid quarterly and are based on prior year income.
Superannuation
While not a tax, super contributions are a compulsory cost and should be planned for alongside tax.
Not every business has all of these obligations, but most have at least one.
A simple starting point for most businesses
If you want a rough starting point, many small businesses set aside between 25 per cent and 30 per cent of their profit for tax. This is not a rule, but it is a common guideline.
For example:
- If your business makes $40,000 in profit for the quarter
- Setting aside $10,000 to $12,000 provides a buffer for income tax and PAYG.
This approach works best for businesses with steady income and relatively simple structures.
However, it does not account for GST or individual circumstances, which is where more accurate planning comes in.
How GST affects quarterly tax planning
GST catches many business owners out because it feels like income. It flows into your bank account along with your sales, but it does not belong to you.
If you charge GST:
- You collect 10 per cent on taxable sales.
- You claim GST credits on eligible expenses.
- The net amount is paid to or refunded by the ATO through your BAS.
A practical habit is to move GST collected into a separate account as soon as it is received. That way, it is not accidentally spent.
For example:
- You invoice $11,000, including GST.
- $1,000 belongs to the ATO
- Moving that $1,000 aside immediately removes temptation and risk
This is an area where bookkeeping services in Nelson Bay can make a real difference, especially for growing businesses.
Understanding PAYG instalments
PAYG instalments are essentially prepayments of income tax. They are based on your previous tax return and are designed to spread tax payments across the year.
You may be given two options:
- Pay a fixed amount set by the ATO
- Calculate instalments based on your actual income.
Choosing the right option depends on how predictable your income is. If your income fluctuates, paying based on actual income can help avoid overpaying.
A Nelson Bay tax agent can help review these options and adjust them when circumstances change.
Setting aside tax as a sole trader
Sole traders often feel tax pressure more intensely because business income and personal income are closely linked.
As a general guide:
- Set aside 25 per cent to 30 per cent of net profit.
- Separate GST immediately if registered
- Review figures at least quarterly.
If your income is increasing, this percentage may need to increase. If income drops, instalments may need to be varied.
This is where working with expert accountants in Port Stephens and Nelson Bay adds value. Adjustments made early are far less stressful than dealing with problems later.
Company tax planning is different.
Companies pay tax at a fixed rate, currently 25 per cent for base rate entities. This makes planning more predictable.
However, directors still need to consider:
- Timing of tax payments
- Dividends and franking credits
- Cash flow management
Just because tax is predictable does not mean it is simple. Strategic planning ensures that taxes do not disrupt operations.
The danger of using one bank account
One of the biggest mistakes business owners make is running everything through one bank account.
When tax, GST, operating expenses, and personal drawings all flow through the same account, clarity disappears.
A simple structure that works well:
- One account for operating income and expenses
- One account for GST
- One account for tax savings
This separation creates discipline without complexity.
How often should you review your tax set aside?
Quarterly is the minimum. Monthly is better, especially if income fluctuates.
Regular reviews allow you to:
- Spot trends early
- Adjust tax estimates
- Improve cash flow forecasting.
This is a core part of business advisory in Nelson Bay and an area where proactive advice pays off.
What about unexpected profits?
Unexpected profits are a good problem to have, but they still create tax obligations.
If you land a large contract or have a strong quarter:
- Recalculate your expected annual profit.
- Adjust the tax set aside immediately.
- Consider PAYG instalment variations if needed.
Ignoring changes is one of the fastest ways to create tax stress.
How SMSFs and investments affect quarterly planning
If you also manage an SMSF or have investment income, quarterly planning becomes more layered.
Investment income may:
- Increase taxable income
- Affect PAYG instalments
- Create timing differences
SMSF accounting in Port Stephens often involves coordinating personal, business, and super strategies to avoid surprises.
The role of your accountant in quarterly tax planning
A good accountant does more than lodge forms.
They help you:
- Estimate tax accurately
- Adjust instalments when needed.
- Improve cash flow discipline.
- Avoid penalties and interest.
If you are searching for accountants near me, look for someone who offers ongoing guidance, not just year-end compliance.
Signs you are not setting aside enough tax
Watch for these warning signs:
- Relying on payment plans every year
- Feeling anxious when BAS is due
- Avoiding checking your numbers
- Using personal funds to pay taxes
These are not failures. They are signals that your system needs adjusting.
Frequently Asked Questions
How much tax should a small business set aside each quarter?
Many businesses start with 25 per cent to 30 per cent of profit, but the correct amount depends on structure, income, and GST obligations.
Should GST be included in my tax savings?
No. GST should be kept separate, as it is not your income.
What if my income changes during the year?
Your tax set aside should be reviewed and adjusted. PAYG instalments can be varied if needed.
Do I need to set aside tax if I am not making a profit?
If there is no profit, income tax may not apply, but GST and other obligations may still exist.
Can I reduce tax by setting aside more expenses?
Only legitimate business expenses can be claimed. Artificially increasing expenses creates other problems.
How do PAYG instalments work?
They are prepayments of income tax based on prior year earnings and are usually paid quarterly.
Should I have a separate tax savings account?
Yes. Separate accounts improve discipline and reduce risk.
How can an accountant help with quarterly tax planning?
They help estimate, monitor, adjust, and optimise tax obligations before problems arise.
Final thoughts
Quarterly tax planning is not about guessing or hoping for the best. It is about understanding your business, knowing your obligations, and consistently setting aside the right amount.
With the right structure and advice, tax stops being something you fear and becomes something you manage with confidence. If you want clarity and control, working with expert accountants in Port Stephens and Nelson Bay can make all the difference.