A smaller refund is rarely an error. Bracket creep, offset phase-outs and HECS repayments compound quietly across the year.

PAYG instalments is the system through which people who earn business or investment income pre-pay their tax quarterly to the ATO. It is not an additional tax; it is the same tax, collected earlier. Understanding how the amount is calculated — and when to vary it — is the difference between managed cash flow and a year-end surprise.

A common misconception among PAYG earners is that a $100 tax-deductible expense "gets you $100 back." A deduction reduces taxable income, not tax payable. The dollar-for-dollar assumption inflates the perceived benefit and can lead to material errors in personal financial decisions.

The Medicare levy surcharge thresholds rose on 1 July 2025 — the single threshold lifting to $101,000. For many taxpayers, however, the surcharge is more likely to apply now, not less. The interaction with rising incomes is the reason.

The most valuable tax planning for individuals happens before 30 June — not at lodgement time. These are the five actions that consistently produce the most material outcomes for individual taxpayers in the 2025–26 financial year.

The ATO's general interest charge is running at 11.17 per cent per annum and is no longer deductible. For many taxpayers, that makes an ATO payment plan one of the most expensive financing arrangements on their balance sheet.

Interest deductibility is determined by how borrowed funds are used — not by the security provided, not by the account the funds pass through. Getting the structure wrong before the loan is drawn is a mistake that is difficult to fix after the fact.