The difference is because some longer-term bonuses are earned in one year but not paid until following years.
Her remuneration included a cash salary of A$975,974, non-monetary benefits of A$11,176, a total cash incentive of A$334,681, superannuation contribution of A$39,625, long service leave accrual worth A$17,383, shares worth A$237,502, share rights worth A$82,845, performance rights worth A$93,742 and shares worth A$711.
Non-monetary benefits can include things such as car parking, taxation services and costs met by the company in relation to in-country benefits.
Watson who has been with the bank since April 2009, has overseen a tough year at the bank in which its cash profit slumped by $562 million or 29 per cent to $1.371 billion as the bank was hit by a rise in credit impairments driven by Covid-19.
Her pay package is much lower than predecessor Hisco who had been with the bank most of his working life and had been chief executive for nearly nine years before his departure.
In 2018, his last full financial year as CEO, Hisco's remuneration was A$3.12 million.
ANZ group boss Shayne Elliot, who is a New Zealander, earned A$5,225,308 ($5,577,307) up from A$5,181,339 after receiving a big boost to his cash salary.