📅 How to File a Federal Tax Extension
An individual federal extension generally gives six additional months to file the return, but it does not extend the time to pay tax. Estimate the balance and pay as much as possible by the original deadline to reduce interest and possible penalties.
The IRS Taxpayer Advocate explains extension options for 2026. Individuals can electronically file or mail Form 4868, or make a qualifying electronic extension payment by the due date.
State extensions are separate. Check the state revenue department even when a federal extension is accepted.
📋 Documents you'll need
- Name, address, and Social Security numbers shown on the return
- Estimate of total federal tax liability
- Federal payments and withholding already made
- Estimated balance due
- Prior-year return and current income records
- Payment account details if paying electronically
🪜 Step-by-step
- Confirm the original federal filing deadline for your situation.
- Estimate total tax, subtract withholding and prior payments, and calculate the expected balance.
- Choose electronic Form 4868 filing, approved tax software, an authorized provider, mail, or a qualifying IRS electronic payment.
- Submit the extension request by the original deadline.
- Pay as much of the estimated balance as possible by that deadline.
- Save the electronic confirmation or proof of timely mailing and payment.
- Check separate state extension and payment rules.
- File the complete return as soon as practical and no later than the extended deadline.
| Estimated cost | The IRS does not charge to file Form 4868 directly. Software or professional-preparer charges may apply. Interest and penalties may apply to unpaid tax. |
|---|---|
| Typical timeline | Electronic confirmation is often immediate. The extension generally moves an April individual filing deadline to October, but confirm the exact date for the tax year and taxpayer situation. |
Frequently asked questions
Does an extension give more time to pay?
No. It extends filing time, not the payment due date.
Do I need Form 4868 if I make an extension payment?
A properly designated electronic extension payment can generate an automatic extension without a separate Form 4868; follow the IRS payment instructions exactly.
Does the federal extension cover my state return?
Not necessarily. State procedures vary.