Franking Credits Mistakes Australians Make and How to Avoid Them

Updated 12 August 2026 · Savings and investing

A Franking Credits Calculator gives a fast answer, but the answer is only as good as what goes in. These are the mistakes we see most often with franking credits calculations in Australia, and how to avoid them.

1. Chasing bonus rates without meeting conditions

Missing a deposit or making a withdrawal can drop a bonus saver to its low base rate.

2. Forgetting tax on returns

Interest is taxed at your marginal rate, so a 5% account may return closer to 3.4% after tax.

3. Ignoring inflation

A return below inflation means your money buys less over time.

4. Comparing total rather than annual returns

Always convert returns to a yearly rate before comparing investments held for different periods.

5. Overlooking the detail that matters most here

If your tax rate is below 30%, excess franking credits are refunded to you.

How the net dividend after tax changes with franking

A common mistake is getting one input slightly wrong. Here is what happens to the net dividend after tax when “Franking (%)” is off by up to 20% in either direction, with everything else held steady.

Franking (%)	Net dividend after tax
80	$639.20
90	$659.60
100	$680.00
110	$700.40
120	$720.80

At 80 the result is $639.20; at 120 it is $720.80. If a small change in this input moves the answer a lot, it is worth double-checking that figure before you rely on the result.

A quick sense check

Franking credit = dividend × franking % × 30 ÷ 70. Tax = (dividend + credit) × your rate − credit. With typical inputs the calculator returns net dividend after tax of $680.00. If your own result looks wildly different, check that each figure is in the right unit and period (weekly, monthly or yearly) before drawing conclusions.