How to Pay Your 1040-ES Estimated Tax Quarterly

What the 1040-ES is and why you pay it quarterly

Form 1040-ES is how you send the IRS money for taxes on income that doesn't have withholding taken out—self-employment income, rental income, investment gains, or retirement withdrawals. Instead of paying once a year, you send four equal payments spread across the year: April 15, June 15, September 15, and January 15 of the following year.

The IRS calls these estimated tax payments. You make them because the tax system expects money to flow in throughout the year, not arrive in one lump sum on April 15. If you don't pay quarterly and owe a large amount on tax day, you may face penalties and interest, even if you eventually pay in full.

The 1040-ES form itself is not a payment—it's a worksheet. You use it to calculate how much to send each quarter based on your expected income for the year. The actual payment goes to the IRS through one of several methods.

Key Takeaways

• You calculate your quarterly payment using the 1040-ES worksheet, which divides your expected annual tax liability into four equal installments.
• The four payment dates are April 15, June 15, September 15, and January 15, though the IRS extends these dates if they fall on a weekend or holiday.
• You can pay online through IRS Direct Pay or the Electronic Federal Tax Payment System (EFTPS), by mail with a voucher, or by phone and credit card through an approved payment processor.
• Underpayment penalties apply if your total quarterly payments fall short of 90 percent of your current year tax or 100 percent of your prior year tax (110 percent if your prior year income exceeded $150,000).
• You do not need to file the 1040-ES form itself—you keep the voucher for your records and file your annual tax return on April 15 the following year.

How to calculate your quarterly payment amount

The IRS publishes a new 1040-ES form each year with a worksheet inside. You estimate your total income for the year, subtract deductions you expect to claim, and calculate the tax on that amount. The worksheet walks you through this step by step. Once you have your total estimated tax for the year, you divide it by four to get each quarterly payment.

If your income is uneven—high some months and low others—you can pay different amounts each quarter instead of four equal payments. This requires using the annualized installment method, also explained in the 1040-ES worksheet. Many self-employed people use this method to avoid overpaying in slow months.

If you underpay, the IRS will calculate the shortfall when you file your annual return and add penalties and interest. If you overpay, you receive a refund or can carry the overpayment forward to next year's estimated taxes.

Payment methods and deadlines

You have four main ways to send your quarterly payment to the IRS:

• IRS Direct Pay: Go to irs.gov, log in, and pay directly from your bank account at no cost. This is the fastest and most secure method. You can schedule payments in advance.
• Electronic Federal Tax Payment System (EFTPS): This is a separate system run by the U.S. Department of the Treasury. You enroll once, then log in to schedule payments. It is also free and allows advance scheduling.
• Credit or debit card: You can pay through an approved payment processor (such as PayPal, Stripe, or Square). The processor charges a fee, usually 1.87 to 2.35 percent of the payment amount.
• Mail: Print the payment voucher from the 1040-ES form, write a check, and mail both to the IRS address listed on the form. Mail payments must arrive by the deadline date.

The payment deadlines are April 15, June 15, September 15, and January 15. If any of these dates falls on a Saturday, Sunday, or federal holiday, the deadline moves to the next business day. The IRS website lists the exact deadline dates each year.

What happens if you miss a payment or pay the wrong amount

If you miss a quarterly deadline or pay less than you owe, the IRS charges underpayment penalties starting from the missed due date. The penalty rate changes quarterly and is based on the federal short-term interest rate plus 3 percent. Even if you pay the full amount owed on April 15 the following year, you still owe the penalty for the months you underpaid.

The IRS uses a safe harbor rule: you avoid penalties if your total quarterly payments equal at least 90 percent of your 2024 tax or 100 percent of your 2023 tax (whichever is smaller). If your 2023 adjusted gross income was over $150,000, the threshold is 110 percent of your 2023 tax. This means you can use last year's tax as a baseline and pay that amount quarterly, even if your income rises this year.

If you overpay your estimated taxes, you have two choices when you file your annual return: receive a refund or apply the overpayment to next year's estimated taxes. There is no penalty for overpaying.

Who must pay estimated taxes

You must pay estimated taxes if you expect to owe $1,000 or more in federal income tax after accounting for withholding and refundable credits. This typically applies to self-employed people, freelancers, gig workers, rental property owners, and anyone with significant investment income.

If you have a job where your employer withholds taxes, you may not need to pay estimated taxes unless you have other income on the side. You can adjust your W-4 form with your employer to increase withholding instead, which accomplishes the same goal of spreading tax payments throughout the year.

If you are unsure whether you need to pay, use the worksheet in the 1040-ES form. If your calculated tax is less than $1,000, you generally do not need to make quarterly payments.

Keeping records and filing your annual return

Keep a record of each quarterly payment you make: the date, amount, and confirmation number. If you pay by mail, keep a copy of the voucher and your cancelled check or bank statement. If you pay online, save the confirmation email or screenshot.

When you file your annual Form 1040 tax return on April 15 the following year, you report all four quarterly payments on Schedule 3. The IRS matches your reported payments against their records. If there is a discrepancy, they will contact you.

You do not file the 1040-ES form itself with the IRS. The form is only a worksheet and payment voucher for your records. Your annual tax return is what the IRS uses to settle your account for the year.

Adjusting your payments if your income changes

If your income drops mid-year, you can recalculate your estimated taxes and pay less for the remaining quarters. Use a new 1040-ES worksheet with your updated income forecast. There is no penalty for paying less if your new estimate is reasonable based on current conditions.

If your income rises, you can increase your quarterly payments to avoid a large bill on April 15. You can also make additional payments beyond the four quarterly deadlines if you want to pay more.

Some people pay all four quarters at once in January to simplify their cash flow. This is allowed as long as the payment is made by January 15 and covers all four quarters for that year.

Frequently Asked Questions

What if I can't pay the full amount by the deadline?

Pay whatever you can by the deadline to reduce the underpayment penalty. The penalty is calculated only on the amount you did not pay by the due date. You can also set up a payment plan with the IRS after you file your return if you owe a balance.

Can I pay estimated taxes monthly instead of quarterly?

The IRS requires four payments per year on the set dates. However, you can pay more than four times—for example, monthly—as long as your total covers the four quarterly deadlines. Extra payments simply reduce the amount due on the next official deadline.

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

No. The 1040-ES is a worksheet and payment voucher for your records only. You keep it with your tax documents. You report your quarterly payments on your annual Form 1040 return, which is what the IRS receives.

What if I paid estimated taxes but my actual income was much lower?

You will receive a refund when you file your annual return. You can choose to get the refund as a check, direct deposit, or apply it to next year's estimated taxes.

How do I know if the IRS received my payment?

If you pay online through IRS Direct Pay or EFTPS, you receive a confirmation number immediately. If you pay by mail, allow two weeks for processing. You can check the status of a mailed payment by calling the IRS at 1-800-829-1040 after two weeks.