The IRS estimated tax payment schedule runs on a quarterly calendar, not a calendar year

Estimated tax payments are quarterly payments you send to the IRS if you expect to owe $1,000 or more in taxes when you file your return and no employer is withholding taxes from your income. The IRS sets four payment important date each year, and each payment covers the income you earned during a three-month period. Missing a important date can result in penalties and interest, even if you pay the full amount owed when you file your annual return.

The payment schedule does not follow the calendar year. Instead, the IRS divides the year into four quarters, each with its own due date. The quarters are not equal in length, and the important date fall on different days of the week each year because they are tied to specific calendar dates rather than a fixed number of days after the quarter ends.

You calculate each quarterly payment based on your income during that quarter, your expected annual income, or your previous year's tax liability — whichever method makes sense for your situation. The IRS Form 1040-ES walks you through the calculation, though many people use tax software or work with a tax professional to determine the amount.

Key Takeaways

  • The IRS sets four estimated tax payment important date each year: April 15, June 15, September 15, and January 15 of the following year.
  • You owe estimated taxes if you expect to owe $1,000 or more when you file and have little or no tax withheld from your income.
  • Each payment covers the income you earned during a specific three-month period, and you calculate it using IRS Form 1040-ES or tax software.
  • Paying late triggers penalties and interest even if you pay your full tax bill when you file your return in April.

The four quarterly payment dates and what they cover

The first estimated tax payment is due April 15 and covers income earned from January 1 through March 31. The second payment is due June 15 and covers April 1 through May 31. The third payment is due September 15 and covers June 1 through August 31. The fourth payment is due January 15 of the following year and covers September 1 through December 31.

When a due date falls on a weekend or federal holiday, the IRS moves the important date to the next business day. For example, if April 15 is a Saturday, the important date becomes Monday, April 17. You can check the current year's exact dates on the IRS website or on Form 1040-ES, which the IRS updates annually.

The January 15 important date is the only one that falls after the calendar year ends. This means your fourth quarter payment for the previous year is due in January while you are preparing your annual tax return. Some people treat this payment as part of their current-year tax planning rather than the prior year.

Who needs to send estimated tax payments

You need to send estimated tax payments if you are self-employed, have income from investments or rental property, receive income as an independent contractor, or have other income sources where no employer withholds taxes. Gig workers, freelancers, business owners, and people with significant investment income are the most common filers of estimated taxes.

The IRS rule is that you owe estimated taxes if you expect to owe $1,000 or more when you file your return and you will not have enough tax withheld through other sources. If you have a spouse and file jointly, the threshold is still $1,000 combined. If you are a farmer or fisherman, the threshold is $500 instead.

You do not owe estimated taxes if you had zero tax liability in the prior year and are a U.S. citizen or resident alien for the entire year. Some people also avoid estimated taxes by having their employer withhold more from their paycheck if they have a second job or side income, though this requires adjusting your W-4 form with your employer.

How to calculate your estimated tax payment

The IRS Form 1040-ES provides a worksheet to calculate your estimated tax. The worksheet asks you to project your income for the year, subtract deductions, and calculate your expected tax liability. You then divide that amount by four to get your quarterly payment, though you can adjust the amount each quarter if your income changes.

Some people use their prior year's tax liability as a shortcut. If your income is stable year to year, you can divide last year's total tax by four and pay that amount each quarter. This method is simpler but may result in overpayment or underpayment if your income or tax situation changes.

Tax software such as TurboTax, H&R Block, or TaxAct can calculate your estimated tax for you based on information you enter about your expected income. A tax professional or accountant can also prepare the calculation if you prefer not to do it yourself. The calculation is free to do on your own using Form 1040-ES, which you can read from the IRS website.

How to send your estimated tax payment to the IRS

The IRS offers several ways to pay estimated taxes. The most common method is to pay online through IRS Direct Pay, which is free and allows you to schedule a payment for a future date. You can also pay by phone, by mail, or through an electronic federal tax payment system (EFTPS) if you prefer.

IRS Direct Pay is accessed through the IRS website at irs.gov. You enter your payment amount, the tax year, and the quarter you are paying for. The system confirms your payment and gives you a confirmation number. You can pay from a bank account or debit card at no charge.

If you pay by mail, you send a check or money order along with a payment voucher. The voucher is Form 1040-ES, which includes a tear-off section for mailing. You address the envelope to the IRS office for your state, which is listed in the Form 1040-ES instructions. Mail payments take longer to process and may arrive after the important date if mailed close to the due date, so paying online is faster and safer.

Penalties and interest for late or missed payments

If you miss an estimated tax payment important date, the IRS charges a penalty called the underpayment penalty. The penalty is calculated on the amount you should have paid and the number of days the payment was late. The penalty rate changes quarterly and is based on the federal short-term interest rate plus 3 percent.

You owe the underpayment penalty even if you pay your full tax bill when you file your annual return in April. The penalty is separate from the tax itself and is calculated on Form 2210, which the IRS includes with your return if you underpaid. You cannot avoid the penalty by paying everything at once on April 15.

The IRS may waive the underpayment penalty in certain situations, such as if you had no tax liability in the prior year, if you retired after age 62 in the current year, or if you experienced a casualty or disaster. You request a waiver by filing Form 2210 and explaining your situation. The IRS does not automatically waive penalties, so you must ask.

Adjusting your estimated tax payments during the year

You can change your estimated tax payment amount each quarter if your income changes. If you earn more than you expected, you can increase your payment for the next quarter. If you earn less, you can decrease it. This flexibility helps you avoid overpaying or underpaying as your income fluctuates.

Some people recalculate their estimated tax after each quarter ends and adjust the remaining payments accordingly. If you had a very profitable first quarter, you might increase your second and third quarter payments. If business slows down, you might lower the remaining payments. This approach requires more record-keeping but can result in a more accurate total payment.

You do not need to notify the IRS of a change. You straightforward send a different payment amount for the next quarter. The IRS will reconcile all your quarterly payments when you file your annual return and either refund the overpayment or bill you for any remaining balance.

Frequently Asked Questions

What happens if I pay estimated taxes but then owe less when I file?

The IRS will refund the overpayment when you file your return, or you can request that it be applied to your next year's estimated taxes. You can also choose to have the overpayment credited toward your next year's first quarter payment to reduce that payment amount.

Can I pay all four quarters at once instead of quarterly?

Yes, you can pay your entire year's estimated tax in one payment, though you still need to designate which quarters the payment covers. Most people pay quarterly because it spreads the cost throughout the year and allows them to adjust based on actual income.

Do I need to file Form 1040-ES with the IRS when I pay?

No, Form 1040-ES is a worksheet and payment voucher for your records. You do not file it with the IRS. If you pay online through IRS Direct Pay, you do not use the form at all — you enter the information directly into the payment system.

What if I forget the due date and pay a few days late?

The IRS charges the underpayment penalty starting the day after the important date. Even a payment that is one day late triggers the penalty. The penalty amount is small for a one- or two-day delay, but it still applies. Setting a calendar reminder a few days before each important date helps prevent this.

Can my spouse and I pay estimated taxes separately or do we have to pay together?

You can pay separately or together. If you file a joint return, you can make one combined payment or two separate payments. The IRS does not care how you split the payment as long as the total reaches your expected tax liability for the year.