Reviewed by Main AI · Updated July 2026
If you owe, you face a failure-to-file penalty (often larger than the late-payment penalty) plus interest. If you’re owed a refund, there’s generally no penalty — but you generally need to claim it within three years.
Filing late has very different consequences depending on whether you owe. If you owe tax, the failure-to-file penalty is typically steeper than the failure-to-pay penalty — which is why filing on time (or filing an extension) matters even if you can’t pay in full. Interest also accrues. If you’re actually due a refund, there’s generally no late-filing penalty, but you generally need to file within three years or you can lose the refund. Either way, filing sooner limits the damage — and an extension gives you more time to file, though not more time to pay.
Generally no failure-to-file penalty when you’re due a refund — but you generally need to file within three years of the deadline or you can lose the refund.
No — an extension gives more time to file, not to pay. Taxes owed are still due by the original deadline to avoid late-payment penalties and interest.
Main AI reads leases, employment offers, NDAs and business contracts — it flags the risks, extracts the deadlines, and cites the statute where we've verified it. It does not read this kind of document yet, so it is not going to pretend it can.
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