An Individual Retirement Account (IRA) is the most common type of retirement account. There are approximately 50 million IRAs totaling approximately $10 trillion. The most common types of IRAs are the Traditional IRA, Roth IRA, SEP IRA, and the SIMPLE IRA. For 2019, the maximum Traditional IRA and Roth IRA contribution amounts are $6,000, or $7,000 if over the age of 50. The SEP IRA maximum contribution amount is $56,000 and the SIMPLE IRA maximum contribution amount is $13,000, with a $3,000 catch-up if over the age of 50 for 2019.