In 2015, you can make a contribution of up to $24,000 to your 401(k), 403(b) or governmental 457(b) plan ($18,000 regular and $6,000 catch-up contributions) and $6,500 to a Roth IRA ($5,500 regular and $1,000 catch-up IRA contributions) for a total of $30,500 for 2015.n 2015, you can make a contribution of up to $24,000 to your 401(k), 403(b) or governmental 457(b) plan ($18,000 regular and $6,000 catch-up contributions) and $6,500 to a Roth IRA ($5,500 regular and $1,000 catch-up IRA contributions) for a total of $30,500 for 2015.