Internal audit function budgets to be flat in 2021 according to Gartner Audit study. Audit function budgets enjoyed a period of growth of approximately 5% per year in the period between 2017-2019. Audit departments are looking to better align and rely on risk coverage from the second line to reduce duplication and improve efficiency. Information security and information technology risks were the two areas where a majority of audit functions planned to spend more time. However, there is a long tail of risk areas demanding more attention and not many will require significantly fewer hours.
Source: https://www.helpnetsecurity.com/2021/03/30/internal-audit-capacity/