April 15, 2024 (11:59 PM ET). Betterment’s 2023 IRA contribution deadline.

You must initiate your deposit through Betterment by 11:59 PM ET on April 15, to ensure that your contribution completes by the deadline. April 15 is also the deadline for the recharacterization of IRA contributions, unless you have filed an extension or are amending your tax return.