Australia's dividend imputation system — introduced in 1987 and made fully refundable in 2000 — is one of the most shareholder-friendly tax regimes in the world. It eliminates the double taxation of corporate profits: once when the company pays tax, and again when shareholders receive dividends.
When an Australian company earns $1,000 of profit and pays 30% corporate tax, it keeps $700 to distribute as a fully franked dividend. Attached to that $700 cash payment is a $300 franking credit — a voucher representing the tax already paid. The ATO then treats the shareholder as if they received the full $1,000 pre-tax, and taxes them at their own marginal rate, crediting the $300 already paid.
If your marginal rate is below 30%, you pay less tax on the income than the credit covers — and the ATO refunds the difference in cash. If your rate is above 30%, you pay the gap. The mathematics creates a powerful incentive for low-income investors (including retirees and super funds) to hold Australian shares.
The formula in practice: Franking credit = Cash dividend × (corporate rate ÷ (1 − corporate rate)). At 30%: credit = cash × 3/7. A $7,000 fully franked dividend carries a $3,000 credit, for a $10,000 grossed-up income on your tax return.