There are no limits to the amount of assets you can roll over from your 401(k), 403(b) or an existing retirement account, but additional contributions can be made to your IRA. If you're currently maxing out your existing 401(k) or 403(b), but would like to contribute more to your retirement, you may want to consider other IRA products. Try our IRA Selector Tool to find the IRA that may be right for you.