Filing an extension can give you extra time to complete your tax return, typically pushing the deadline from April to October. But what happens if you file an extension but owe money? Filing an extension does not give you extra time to pay any taxes owed. If you may owe taxes but need more time to gather documents or consult a tax professional, it is important to understand the consequences of filing an extension without paying your balance. Failing to pay by the original deadline can lead to penalties and interest, increasing the amount you owe over time.

Working with a financial advisor or tax professional can help you manage payments, minimize penalties and develop a plan to avoid future tax surprises.

What Happens If I File an Extension, But Owe Money?

When you file an extension, you receive extra time to file your return but not to pay your taxes. If you owe money, you must pay by the original tax deadline (usually April 15). Otherwise, the IRS will begin assessing interest and possibly penalties on the unpaid amount. You can submit Form 4868 to request an extension. However, any unpaid balance starts accruing interest from the original due date.

The IRS generally charges a failure-to-pay penalty. This 0.5% of the unpaid taxes for each month or part of a month after the due date, up to a maximum of 25%. In addition, interest accrues on the unpaid tax at the federal short-term rate plus 3%. Over time, these costs can add up significantly if the balance remains unpaid.