In the study of over 1,300 managers, one in 20 said they intended to set up their own business and a further 5% said they are looking to embark on a different career in 2013.
When respondents were asked what skills they would like to develop this year, leadership came top (38%), time management second (16%) and communication and technical skills third (15%).
It also found that more staff, more training and an increase in flexible working were the top changes managers would like to see in 2013.
Charles Elvin, chief executive of ILM, said: "It seems managers primary focus for the this year will be to retain their current jobs rather than seeking new ones.
"Businesses mustn't be complacent though, and they need to ensure they keep their workers motivated and engaged through 2013."
Elvin added: "It is important that employees should be encouraged to work flexibly to best suit their needs, and we see that improving work life balance is a priority for many managers next year.
"It isn't surprising that so many are hoping 2013 will bring a more positive outlook for their companies, as the ongoing recession has made times particularly tough for managers.
"We know that effective leadership and management skills are key to organisational growth, so at a time when managers are being tested more than ever, the availability of support and development is critical."