If you're asking, 'can I cancel my 401k and cash out while still employed,' the usual answer is no. You can normally stop or reduce new contributions, but you usually cannot close the account and take all the money while you still work for the employer that sponsors the plan.
There are exceptions. Your plan may allow an in-service withdrawal after age 59 1/2, a hardship withdrawal for a qualifying immediate need, or a loan if loans are permitted. But a full cash-out just because you want the money is usually not available until you leave the job, become disabled, reach a plan-approved distribution age, or another distributable event occurs.



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