IRA contribution limits unchanged. The IRA contribution limit will remain $5,500 in 2015. Investors age 50 and older can contribute an additional $1,000 to an IRA, an amount that is not eligible for an annual cost-of-living adjustment.Bigger IRA income limits.he IRA contribution limit will remain $5,500 in 2015. Investors age 50 and older can contribute an additional $1,000 to an IRA, an amount that is not eligible for an annual cost-of-living adjustment.