Does a Tax Extension Give You More Time to Pay?

What exactly does an extension extend?

Only the deadline for filing the return named on the extension form. Form 4868 extends Form 1040 (and 1040-SR and 1040-NR) by six months, and filing it also automatically extends the Form 709 gift tax return. Form 7004 extends the business return identified by its form code, six months for Forms 1120, 1120-S, and 1065 and 5½ months for Form 1041. Form 8868 extends one 990-series return by six months.

It does not extend the payment due date, the deadline for traditional or Roth IRA contributions, the partners' or shareholders' own Form 1040 deadlines when a partnership or S corporation extends, a related Form 990-T, or any state deadline. (A SEP-IRA employer contribution, by contrast, can be made up to the extended date.)

When is the tax still due?

On the original due date of the return, even when the return itself is extended. For calendar-year filers in the 2027 season, already adjusted for weekends and legal holidays:

Fiscal-year filers pay by the 15th day of the 3rd month after year-end (1065, 1120-S), the 4th month (1120, 1041), or the 5th month (990 series). U.S. citizens abroad get an automatic two-month extension to file, to Tuesday, June 15, 2027, but interest still runs from April 15, 2027. Full breakdown: 2027 extension deadlines.

What happens if I file an extension but don't pay?

You owe interest and the failure-to-pay penalty on the unpaid balance, but not the much larger failure-to-file penalty. The failure-to-pay penalty is 0.5% of the unpaid tax for each month or part of a month it stays unpaid, up to 25%, rising to 1% per month if the tax is still unpaid 10 days after the IRS issues a notice of intent to levy. Interest is charged on top at the federal short-term rate plus 3%, compounded daily and adjusted quarterly.

Individuals get one break: if at least 90% of the tax is paid by the original due date and the rest is paid with the return by the extended date, the failure-to-pay penalty is waived. Interest still applies to the unpaid part. For a worked example of how the two penalties compare, see the penalties guide.

How do I estimate what I owe?

Start with last year's total tax, adjust it for what changed, and subtract what you have already paid in. The sources you need:

• Last year's return: the total tax line is your starting point.
• Federal income tax withheld this year, from your final pay stub or Form W-2 (box 2), plus any withholding on Forms 1099.
• Estimated tax payments made during the year (Form 1040-ES), including last year's overpayment applied forward.
• Income that changed: a raise or job loss, self-employment income with no withholding, a large capital gain, or a Schedule K-1 (your share of a partnership, S corporation, or trust's income).
• Credits and deductions that changed, such as a new child or a home purchase or sale.

Form 4868 asks for a reasonable estimate of your total tax for 2026, made from the information you have when you file. Pay as much of the estimated balance as you can by the original due date; rounding up is safe, because an overpayment comes back as a refund when you file.

That estimate is separate from the estimated-tax safe harbor. Paying, through withholding and timely estimated payments during the year, at least 90% of this year's tax or 100% of last year's (110% if last year's adjusted gross income was over $150,000, or $75,000 if married filing separately) protects you from the penalty for underpaying estimated tax. It does not protect you from the failure-to-pay penalty or interest on a balance still owed after the original due date.

The extension form asks for three figures: estimated total tax for the year, payments and credits already made, and the balance due. Our wizard collects the same three. The estimate must be made in good faith: the IRS can treat a Form 4868 as invalid if the tax was not properly estimated, exposing you to the failure-to-file penalty as if no extension had been filed. A careful estimate that turns out low is fine; a blank or obviously unreasonable one is not.

How do I pay?

Directly to the IRS, by the original due date. GrantExtension transmits your estimate on the extension form but does not collect or forward tax payments; our checkout charges only the filing fee.

Individuals (Form 4868).IRS Direct Pay draws from a bank account with no fee; choose "extension" as the reason and the IRS also treats the payment as your Form 4868. EFTPS works the same way but requires enrolling in advance. Debit and credit cards go through IRS-authorized processors, which charge their own fee. If you file a paper Form 4868 instead, a check or money order goes in the same envelope, payable to "United States Treasury" with your SSN, daytime phone number, tax year, and "Form 4868" written on it; there is no separate payment voucher.

Businesses (Form 7004). Corporations must deposit federal income tax electronically, generally through EFTPS, so enroll before the deadline if the business has never used it. Estates, trusts, and other Form 7004 filers not subject to the corporate deposit rules may be able to enclose a check with a paper Form 7004.

Nonprofits (Form 8868). Most exempt organizations owe nothing with the extension. Tax on Form 990-T, 990-PF, or 4720 is deposited electronically through EFTPS.

What if I can't pay in full?

File the extension, pay as much as you can by the original due date, and file the return by the extended date; every dollar paid on time stops accruing penalty and interest. For the rest:

• Short-term payment plan. Individuals who owe less than $100,000 in combined tax, penalties, and interest may generally qualify online for up to 180 days to pay in full. No setup fee, but penalties and interest continue to accrue.
• Installment agreement. Individuals who owe $50,000 or less in combined tax, penalties, and interest and have filed all required returns may generally apply online for monthly payments. Current online setup fees are $29 for direct debit and $69 for other monthly payment methods, with reduced or waived fees for qualifying low-income taxpayers.
• Offer in compromise. The IRS may accept less than the full amount from taxpayers who genuinely cannot pay it; a separate application with strict eligibility, not a routine option.

Reasonable cause relief may still be available in appropriate cases. For eligible original returns with due dates on or after January 1, 2027, the IRS's Automatic Exemption from Penalty program replaces First Time Abate for qualifying failure-to-file, failure-to-pay, and failure-to-deposit penalties. Interest is removed only when the underlying tax or penalty is reduced. You do not have to apply for AEP; if a penalty is assessed anyway, respond to the notice and ask for reasonable-cause relief when the facts support it.

Do business and nonprofit extensions work the same way?

Yes. Any entity-level tax — tax the business itself owes — is due by the original due date regardless of the extension: a C corporation's tax on Form 1120, an estate or trust's tax on Form 1041, unrelated business income tax on Form 990-T, a private foundation's excise tax on Form 990-PF, and excise taxes on Form 4720. Form 7004 and Form 8868 ask for tentative (estimated) tax, payments, and balance due for exactly this reason. A Form 990 or 990-EZ carries no tax, so an organization extending only its Form 990 has nothing to pay.

Pass-through entities — businesses whose income is taxed on the owners' returns — are the wrinkle. A partnership filing Form 1065 or an S corporation filing Form 1120-S usually owes nothing at the entity level (an S corporation's built-in gains tax is the main exception). The income is taxed on the partners' and shareholders' own Forms 1040, where it is due by April 15, 2027, and extending the entity return does not extend theirs. Each owner who needs more time files their own Form 4868 and pays an estimate, even if the Schedule K-1 showing their share will not arrive until the entity files in September. See the partnership and S-corp guides.

Extension and payment FAQ

Sources

• Form 4868, with its instructions (PDF): Form 4868: what it extends (including Form 709), that it doesn't extend payment, the three figures, the reasonable estimate, the 90% rule, and paying with a paper form
• Instructions for Form 7004: Form 7004: six months, or 5½ for Form 1041; no extra time to pay; electronic deposits through EFTPS; tentative tax
• Instructions for Form 8868: Form 8868: six months, electronic deposits, and one return per form
• Form 8868 (PDF): which returns carry tax on Form 8868
• IRS: Get an extension to file your tax return: paying online as the extension, and paying by the April date
• IRS: Failure to pay penalty: the failure-to-pay penalty, the 1% levy rate, and the 0.25% payment-plan rate
• IRS: Failure to file penalty: the 5% a month failure-to-file penalty
• IRS: Quarterly interest rates: interest: the federal short-term rate plus 3 points, compounded daily, set each quarter
• IRS: Interest: interest still applies during an extension
• IRS: Direct Pay with bank account: IRS Direct Pay
• IRS: EFTPS: The Electronic Federal Tax Payment System: EFTPS
• IRS: Pay taxes by card or digital wallet: card payments and processor fees
• IRS: Pay by check or money order: paying by check or money order
• IRS: Payment plans; installment agreements: short-term plans, installment agreements, setup fees and Form 9465
• IRS: Offer in compromise: offers in compromise
• IRS: Penalty relief for reasonable cause: reasonable-cause relief
• IRS: Administrative penalty relief: Automatic Exemption from Penalty replaces First Time Abate
• IRS: Penalty relief: interest on a removed penalty
• IRS Topic no. 306, Penalty for underpayment of estimated tax: the estimated-tax safe harbor
• Publication 505, Tax Withholding and Estimated Tax: the 110% safe harbor above $150,000 of adjusted gross income
• Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs): IRA contributions are not extended
• Publication 560, Retirement Plans for Small Business: SEP contributions can be made by the extended due date
• Publication 509, Tax Calendars: fiscal-year due dates for Forms 1065, 1120-S, 1120 and 1040
• Instructions for Form 990: the 5th month for the 990 series
• Instructions for Form 1120-S: an S corporation's own taxes, such as built-in gains tax
• IRS: U.S. citizens and resident aliens abroad: automatic 2-month extension of time to file: interest still runs from the April due date for taxpayers abroad