Quarterly Estimated Tax Calculator

What Are Quarterly Estimated Taxes?

Quarterly estimated taxes are payments you make to the IRS four times a year to cover your income tax and self-employment tax liability. The U.S. tax system operates on a "pay-as-you-go" basis, meaning you're expected to pay taxes on income as you earn it throughout the year — not just once at tax time.

If you're a W-2 employee, your employer handles this for you through payroll withholding. But if you're self-employed, a freelancer, an independent contractor, or you have other income that isn't subject to withholding, you're responsible for making these payments yourself.

The IRS uses Form 1040-ES to help you calculate and submit your estimated tax payments. Your estimated tax is the total of your expected income tax, self-employment tax, and any other taxes, minus your expected credits and withholding.

Who Needs to Pay Quarterly Estimated Taxes?

Generally, you need to pay quarterly estimated taxes if both of these are true:

• You expect to owe at least $1,000 in federal tax for the year (after subtracting withholding and refundable credits)
• Your withholding and refundable credits will be less than the smaller of: 90% of the current year's tax, or 100% of last year's tax (110% if your AGI exceeded $150,000)

This typically includes:

• Freelancers and independent contractors
• Small business owners (sole proprietors, single-member LLCs)
• Gig workers (Uber, DoorDash, Instacart, etc.)
• Landlords with rental income
• People with significant investment income
• Retirees with pension or IRA distribution income

2026 Quarterly Estimated Tax Due Dates

Estimated taxes are not due on a true quarterly schedule. The IRS has four uneven payment periods:

If a due date falls on a weekend or federal holiday, the payment is due the next business day. Most self-employed people split their annual estimate into four equal payments, though you can also use the annualized income installment method if your income is uneven throughout the year.

How Self-Employment Tax Works

Self-employment (SE) tax covers Social Security and Medicare contributions for people who work for themselves. When you're a W-2 employee, your employer pays half of these taxes — but when you're self-employed, you pay both halves.

Here's how it breaks down for 2026:

• Social Security: 12.4% on net SE income up to $176,100
• Medicare: 2.9% on all net SE income (no cap)
• Additional Medicare: 0.9% on SE income over $200,000 (single) or $250,000 (married filing jointly)

The total SE tax rate is 15.3%, but it's calculated on only 92.35% of your net self-employment income (this adjustment accounts for the employer-equivalent portion of the tax). You can also deduct half of your SE tax from your adjusted gross income, which lowers your income tax.

Penalties for Underpayment

If you don't pay enough estimated tax during the year, the IRS will charge an underpayment penalty when you file your return. The penalty is essentially interest on what you should have paid, calculated for each quarter separately.

You can avoid the penalty if you meet any of these conditions:

• You owe less than $1,000 when you file your return
• You paid at least 90% of the current year's tax liability throughout the year
• You paid at least 100% of last year's tax liability (110% if your prior year AGI exceeded $150,000)

How to Pay Quarterly Estimated Taxes

You have several options for making your quarterly estimated tax payments:

1. EFTPS (Electronic Federal Tax Payment System): The IRS's free online payment system at eftps.gov. You can schedule payments in advance and it keeps a complete record. This is the most popular method for self-employed taxpayers.
2. IRS Direct Pay: Pay directly from your checking or savings account at irs.gov/payments. No registration required, but you can't schedule future payments.
3. Credit or debit card: Pay through IRS-approved processors. Convenience fees apply (typically 1.85-1.98% for credit cards).
4. Check or money order: Mail payment with a 1040-ES voucher to the IRS. Slowest method and no confirmation of receipt.

Whichever method you choose, make sure to keep records of every payment with the date and confirmation number. You'll need this information when you file your annual return.

Tips for Managing Quarterly Tax Payments

• Set aside 25-30% of net income in a separate savings account as you earn it. Don't wait until the due date to find the cash.
• Keep your books current. If you update your bookkeeping monthly, your quarterly estimate will be based on real numbers, not guesses.
• Use the safe harbor method your first year of self-employment. Pay 100% of last year's total tax to avoid penalties, then adjust once you have a full year of self-employment data.
• Don't forget state taxes. Most states also require quarterly estimated payments if you owe above a certain threshold. Check your state's department of revenue for specific rules and due dates.
• Schedule payments in advance using EFTPS. Set up all four payments at the beginning of the year so you never miss a deadline.
• Adjust mid-year if income changes. If your income increases or decreases significantly, recalculate your estimates. You're not locked into the same amount each quarter.