Andrew Thorburn is taking an extended break over the summer.

The NAB chief executive will take most of January off before returning for a period to deal with the bank’s response to the Hayne royal commission which is due to report on February 1st.

Business Insider has confirmed he will then take a period of further leave — as much as a month — after dealing with the royal commission fallout.

Thorburn discussed taking some of his long service leave with chairman Ken Henry and the board at the start of this year.

NAB’s share price is around 1.4% lower in early afternoon trade, in line with falls in the share prices of other major banks.

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