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Quarterly Estimated Taxes for Self-Employed Business Owners

Published October 6, 2026 · Updated October 6, 2026 · By

Self-employed people often need to make estimated tax payments because no employer is withholding federal income tax, Social Security tax, and Medicare tax from their business income. Whether you need to pay, and how much, depends on your individual tax situation.

Key takeaways

  • Estimated tax is a method of paying tax during the year.
  • Self-employed taxpayers may need to account for both income tax and self-employment tax.
  • Form 1040-ES provides the federal worksheet and payment framework.
  • Income changes during the year can change the amount you should estimate.
  • State estimated-tax rules are separate from federal rules.

What are estimated taxes?

The IRS explains that estimated tax is used to pay income tax and other taxes for income that is not subject to withholding. For self-employed individuals, estimated tax may cover income tax as well as Social Security and Medicare taxes.

Start with the official IRS Self-Employed Individuals Tax Center.

Who may need to pay estimated taxes?

Business owners, independent contractors, freelancers, and others with income not subject to sufficient withholding may need estimated payments. The exact requirement depends on expected tax, withholding, credits, prior-year tax, and other factors.

Use the current-year IRS Form 1040-ES instructions or work with a tax professional rather than relying on a generic percentage.

How do you estimate the payment?

The IRS Form 1040-ES worksheet starts with expected income, deductions, credits, and taxes. Prior-year tax information is often useful, but a major income change can make a simple prior-year estimate inaccurate.

What if income changes during the year?

Re-estimate. The IRS notes that if expected earnings change, taxpayers can complete another Form 1040-ES worksheet to recalculate later payments.

Do estimated taxes have to be exactly equal each quarter?

Not always. Income can be uneven during the year, and there are tax rules for annualizing income in some situations. If your income is highly seasonal or irregular, professional review can be especially helpful.

Federal vs. state estimated taxes

Federal estimated payments do not automatically satisfy state obligations. Each state can have its own rules, forms, thresholds, and payment system.

Bookkeeping makes estimates better

Estimated taxes are easier to project when the books are current. If your revenue, expenses, and profit are months behind, your estimate may be based on incomplete information.

Frequently asked questions

Where can I find the official federal estimated-tax form?

Use the current Form 1040-ES and instructions available through IRS.gov.

Can I pay estimated taxes online?

The IRS provides several payment methods at IRS.gov/payments.

What if I miss an estimated payment?

You may face an underpayment penalty depending on the circumstances. Review the current IRS rules or speak with a tax professional rather than waiting until the return is filed.

Next step: Explore TaxFlow and MTA’s Self-Employed Tax Services for a more organized year-round tax workflow.