$78,335.23
$14,100.34
$14,129.55
$28,229.89
$28,229.89
$7,057.47
$13,200.00
$3,300.00
28.23
%
$78,335.23
$14,100.34
$14,129.55
$28,229.89
$28,229.89
$7,057.47
$13,200.00
$3,300.00
28.23
%
The Estimated Tax Calculator helps self-employed individuals, freelancers, investors, and others with non-withheld income determine their quarterly estimated tax payments. If you don't have an employer withholding taxes from your paycheck, the IRS requires you to pay taxes throughout the year via estimated payments.
The IRS requires estimated tax payments if you expect to owe $1,000 or more when you file your return and your withholding and refundable credits will be less than the smaller of 90% of your current year's tax or 100% of your prior year's tax (110% if your prior year AGI exceeds $150,000). This is known as the safe harbor rule.
Estimated taxes cover not just income tax but also self-employment tax (Social Security and Medicare for self-employed individuals). The combined burden can be significant — a self-employed person earning $100,000 may owe roughly $26,000–$30,000 in combined federal income and SE tax.
Quarterly estimated payments are due on April 15, June 15, September 15, and January 15. Note that the periods are not equal — the second quarter is only two months. Missing a payment or paying too little triggers underpayment penalties, calculated at the federal short-term rate plus 3 percentage points.
This calculator estimates your annual federal income tax and self-employment tax, subtracts any W-2 withholding, and divides the remainder into four equal quarterly payments. It also calculates the safe harbor amount (110% of prior year's tax), which is the minimum you should pay to avoid penalties regardless of your current year liability.
The calculation process:
Pay the greater of your calculated quarterly payment or the safe harbor amount divided by 4 to avoid any underpayment penalties. If your quarterly payment exceeds 25% of the safe harbor, you may be able to pay less. If your income varies significantly, consider using the annualized income installment method (Form 2210, Schedule AI).
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Self-employed freelancer should pay approximately $6,538 per quarter.
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Mixed income with $8k already withheld from W-2.
Anyone who expects to owe $1,000 or more in federal taxes after subtracting withholding and credits — typically self-employed individuals, freelancers, landlords, investors, and retirees without adequate withholding.
Q1: April 15, Q2: June 15, Q3: September 15, Q4: January 15 of the following year. If a due date falls on a weekend or holiday, the deadline moves to the next business day.
If you pay at least 100% of your prior year's tax liability (110% if prior year AGI exceeded $150,000) through withholding and estimated payments, you won't owe underpayment penalties — even if you owe additional tax at filing.
The IRS charges an underpayment penalty calculated at the federal short-term interest rate plus 3 percentage points, applied to each underpaid quarter from the due date until the payment is made.
Yes. If your income changes, you can increase or decrease future payments. There's no requirement to pay equal amounts each quarter, though equal payments are simplest.
Pay online via IRS Direct Pay, EFTPS, or credit/debit card. You can also mail a check with Form 1040-ES voucher. Electronic payments are recommended for instant confirmation.
Most states with an income tax also require estimated payments. State due dates and safe harbor rules may differ from federal — check your state tax authority's guidelines.
If your income is uneven throughout the year, this method (Form 2210, Schedule AI) lets you base each quarter's payment on income actually earned during that period, potentially reducing penalties.
If your income is growing, paying only the safe harbor amount means you'll owe a large balance at filing. Consider paying closer to your actual expected tax to avoid a cash crunch in April.
IRS applies payments in order received. If you miss Q1 but make a larger Q2 payment, the penalty for Q1 still accrues. It's best to pay each quarter on time.
Roboculator Team
The Roboculator Team explains calculations, planning tools, and practical formulas in clear language for real-life situations.
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