What Happens If You Don't File Your Taxes

Every year, millions of people don't file a tax return. Some of them forgot. Some of them couldn't afford to pay what they owe and figured not filing was better than filing and not paying. Some of them didn't earn enough to think it mattered. Almost all of them are wrong about the consequences, and the people who didn't file because they couldn't pay made the worst mistake of all, because the penalty for not filing is much worse than the penalty for not paying.

Let's start with the two penalties, because the difference matters. If you owe taxes and you don't pay on time, the IRS charges you a failure-to-pay penalty of 0.5% of what you owe per month, up to 25% total, plus interest. That's not great, but it's manageable. If you don't file at all, the failure-to-file penalty is 5% of what you owe per month, up to 25% total — ten times higher, and it hits the 25% cap in just five months. On a $2,000 tax bill, not paying costs you about $10 a month in penalties. Not filing costs you $100 a month. Same debt, ten times the penalty, just because you didn't send in the paperwork. Filing the return, even if you can't pay a single dollar, is the single most important thing you can do.

The second thing people get wrong is thinking the IRS won't notice. They will. Your employer sends the IRS a copy of your W-2. Your bank sends them a copy of your 1099. If you did freelance work, your clients sent them a 1099 too. The IRS has all of your income information already. They know roughly what you owe. If you don't file, they will eventually file a return for you, and their version will not be in your favor. It's called a substitute for return, and it uses only the income they know about. It doesn't include any deductions, any credits, or any expenses. No standard deduction beyond the basics, no child tax credit, no education credits, no business expenses. The tax bill they come up with is almost always higher than what you would have owed if you'd filed yourself, and then they add the penalties and interest on top of it.

The third thing is the timeline. The IRS doesn't come after you the week after Tax Day. It usually takes a year or two before you hear anything. That delay makes people think they got away with it, and then the letter shows up. First it's a notice saying you didn't file. Then it's a notice with a proposed tax bill. If you ignore those, the IRS can garnish your wages, take money directly out of your bank account, or put a lien on your property.

But here's the part that surprises most people: if you were owed a refund, not filing costs you money in the other direction. The IRS owes you that refund, but you only have three years to claim it. If you don't file within three years of the original deadline, the refund is gone. The government keeps it. Every year, over a billion dollars in refunds goes unclaimed because people didn't file. If you're a student or a part-time worker who had taxes withheld from your paychecks, there's a real chance the IRS owes you money, and not filing means you just gave it away.

There's another group that doesn't file because they think they didn't earn enough. If you earned under the filing threshold — about $15,000 for a single filer in recent years, though the exact number changes — you may not be legally required to file. But you should file anyway, because the refund is often the reason. If any tax was withheld from your paychecks, the only way to get it back is to file a return. The same goes for refundable credits like the Earned Income Tax Credit, which can be worth thousands of dollars for low-income workers and which you can only get by filing. Not filing when you don't have to can literally cost you thousands.

So what do you do if you haven't filed for one year, or two, or five? First, don't panic, and don't keep ignoring it. The longer you wait, the worse the penalties get, but the IRS is much more willing to work with people who come forward than people they have to chase. Second, file the missing returns. Start with the most recent year and work backward. You can file old returns, and free filing options exist for most people. Third, if you owe money, look into your options. The IRS offers payment plans that let you pay over months or years, and if you genuinely can't afford to pay, there's an offer in compromise program that lets you settle for less than you owe.

There's one more thing worth knowing: the IRS has a statute of limitations on collecting. Generally, they have ten years from the date the tax was assessed to collect it. But that clock doesn't start until a return is filed or the IRS files one for you. If you never file, the clock never starts, and the debt can follow you indefinitely. Filing starts the clock. That's another reason to file even when the news is bad.

The worst thing you can do with taxes is nothing. Filing late is better than not filing. Filing and not paying is better than not filing. Owing money and setting up a payment plan is better than pretending the IRS doesn't know you exist. They know. File the return, deal with the number, and move on. The penalty for a mistake is almost always smaller than the penalty for silence.

Disclosure: This article was drafted with AI assistance and reviewed by the author.