KEY POINTS
  • If you’re still waiting on a tax refund, you may be earning interest on your unpaid balance, and the rate jumps to 6% on Oct. 1, according to the IRS.
  • Typically, the IRS has 45 days to process your tax return and issue a refund before interest starts to accrue.
  • However, "it’s taxable, so be prepared to report it,” warned Tommy Lucas, financial advisor at Moisand Fitzgerald Tamayo.

Millions of Americans still have tax returns in limbo as the IRS works to clear its backlog.

But there's a little good news if you're missing a refund: You may be earning interest on your unpaid balance, and the rate jumps to 6% from 5% on Oct. 1, according to the agency.