how much can you defer to 401k
1. There are restrictions on how much you can contribute to different accounts. The 2015 contribution limit for a 401(k) is $18,000; $24,000 if youâre 50 and over. Then you can also deposit up to $5,500 in a Roth or traditional IRA for 2015 ($6,500 if youâre 50 and up).Thatâs the combined limit for both types of IRAs, by the way.You canât put, say, $5,500 each into an IRA and a Roth IRA.hen you can also deposit up to $5,500 in a Roth or traditional IRA for 2015 ($6,500 if youâre 50 and up). Thatâs the combined limit for both types of IRAs, by the way. You canât put, say, $5,500 each into an IRA and a Roth IRA.