An Additional Voluntary Contribution is extra money you choose to put into your retirement plan beyond the required or automatic contributions. This is something you decide to do on your own, not something your employer requires. It can help you grow your retirement savings faster and may give you more flexibility or security in the future. Depending on your plan, you might be able to make these contributions on a pre-tax or after-tax basis. Making additional contributions is completely optional, but it’s one way to take more control over your financial future.