There are two main types of IRA contributions that you can initiate on the Transfer page of your account when initiating a cash deposit from your bank: One-time deposit: This deposit type allows you to make a one-time tax year contribution to an IRA. The annual limit for 2018 is $5,500 as per IRS rules ($6,500 if age 50+). Roth IRAs have the same maximum contribution limits, but additional income limits may also apply. The total contribution in a given year to all types of IRAs cannot exceed ...