Every year, the IRS pays interest on refunds that take extra time to process, with interest accruing from April 15 until whenever the agency cut your check (or dropped your direct deposit). If you haven’t yet received your refund check, you’re not alone: The IRS said back in June that it had a backlog of 4.7 million returns.
This year, the interest accrual period began on April 15, as usual — even if you didn’t file until July 15. So, in effect, there was a modest but real advantage to filing later this year. Couple that with the IRS backlog, and it means more people than usual will get a tax interest payment from the IRS this year.