"Immediate vesting" means that an individual gains full ownership or rights to something, such as an investment or retirement plan, right away without any waiting period. Full definition
What's more, all of the schools reported minimum service requirements of five years or less — with half of schools offering immediate vesting or within one year of employment. (teacherpensions.org)
Some stock option plans allow for immediate vesting, while others may delay vesting. (us.axa.com)
Under the proposed legislation employees would be given immediate vesting, which means they would keep all the contributions made in their name from the start of the plan. (canadianlawyermag.com)