<prompt> Human: Is the annual limit based on a calendar year, or does it alway adjust for the past 365 days?For example, can I place 5500 in the account on December 31st, and then 5500 the next week in January of the next year? Or would I have to wait until the next December?  <response>: You can put 5500 per calendar year. You have up until April of 2019 to finish contributions to your 2018, so you could technically open up an IRA early 2019, put 5500 in there before April 2019 for your 2018 limit, and then right away put in another 5500 toward your 2019 limit. 