Yes — if you're owed a refund, there's no penalty for filing late. However, you must file within 3 years of the original filing deadline to claim a refund. For a 2021 return with a deadline of April 18, 2022, you must file by April 18, 2025 to claim any refund. After that window closes, the refund is forfeited to the government permanently. If you owe taxes but don't file, the failure-to-file and failure-to-pay penalties start accruing immediately. There are no penalties for filing late when you're owed a refund — but you lose the money if you wait too long. The IRS estimates billions of dollars in unclaimed refunds expire each year.