SmartAsset and Yahoo Finance LLC may earn commission or revenue through links in the content below. Converting retirement funds from a 401(k) into a Roth IRA offers the opportunity for tax-free growth and tax-free withdrawals in retirement, while also avoiding Required Minimum Distribution (RMD) rules. However, Roth conversion requires paying a significant tax bill up front. Often, this initial tax bill can be partially mitigated by gradually converting the 401(k) over time to keep yourself in lower tax ...