Estimated Tax Calculator

Calculate quarterly tax payments for self-employment

Income Details
Estimated Tax Results
Quarterly Payment
$0.00/quarter
Annual Total: $0.00
Income Tax: $0.00
Self-Employment Tax: $0.00
Total Tax: $0.00
Less Withholding: $0.00
Safe Harbor 100%: $0.00
Safe Harbor 110%: $0.00
Due dates: Apr 15, Jun 15, Sep 15, Jan 15

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What is Estimated Tax?

Estimated tax is the method used to pay tax on income that is not subject to withholding, including income from self-employment, interest, dividends, rent, gains from the sale of assets, prizes, and awards. This calculator helps you determine your quarterly estimated tax payments for IRS Form 1040-ES.

How to Use This Calculator

Step 1: Select your tax year and filing status.
Step 2: Enter your expected total income for the year.
Step 3: Enter your self-employment income (if any).
Step 4: Enter any W-2 withholding already paid.
Step 5: Enter your expected deductions.
Step 6: Click "Calculate" to see your quarterly payment amount.

Estimated Tax Examples

Example 1 - Freelancer: Sarah, single, expects $75,000 in freelance income in 2024. She takes the standard deduction ($13,850). Her estimated quarterly tax payment is approximately $4,850 per quarter, covering both income tax and self-employment tax.

Example 2 - Side Business: Mike, married filing jointly, earns $50,000 from his W-2 job (with $8,000 withheld) and $30,000 from a side business. After deductions, his estimated quarterly payment for the business income is about $2,200 per quarter.

Who Needs to Pay Estimated Taxes?

You generally need to make estimated tax payments if you expect to owe tax of $1,000 or more when you file your return. This typically includes self-employed individuals, freelancers, independent contractors, small business owners, and those with significant investment income.

IRS Safe Harbor Rules

  • 100% Rule: Pay 100% of last year's tax liability to avoid penalties.
  • 110% Rule: If your AGI exceeds $150,000, pay 110% of last year's tax.
  • 90% Rule: Pay at least 90% of current year's tax liability.
  • Quarterly Due Dates: April 15, June 15, September 15, and January 15.

Frequently Asked Questions

How are estimated taxes calculated?
Estimated taxes combine your income tax (based on tax brackets) plus 15.3% self-employment tax (Social Security and Medicare), minus any withholding. The result is divided by 4 for quarterly payments.
What happens if I underpay estimated taxes?
You may owe an underpayment penalty. However, you can avoid penalties by meeting one of the IRS safe harbor rules: paying 100% (or 110% for high earners) of last year's tax, or 90% of current year's tax.
Can I pay estimated taxes annually instead of quarterly?
No, the IRS requires quarterly payments. Missing quarterly deadlines can result in penalties, even if you pay the full amount by the annual tax filing deadline.
Do I need to pay estimated taxes if I have a W-2 job?
If your W-2 withholding covers your total tax liability, you don't need estimated payments. You can also increase your W-2 withholding to cover side income instead of making separate estimated payments.