You can take money out before you reach that age. Typically, it is taxable.The Early Withdrawal Calculator (the "tool") allows you to estimate the impact of taking a hypothetical early withdrawal from your retirement account. Use this calculator to estimate how much in taxes and penalties you could owe if you withdraw cash early from your 401(k) You can withdraw funds from a 401(k) anytime. If you have a 401(k) plan sitting with a former employer, you can begin accessing those funds as early as 59½. Don't withdraw money from your 401(k) without reading this. Bankrate has what you need to know. 401(k) plans are subject to strict participant distribution rules. Can I Withdraw From My 401k Early?