TL;DR

As a freelancer, no one withholds taxes from your income — so you pay quarterly. Estimated taxes are advance payments toward your annual tax bill, made four times per year to avoid penalties for underpayment.

Key Points

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Estimated taxes are due four times per year: April 15, June 15, September 15, and January 15 of the following year

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You generally must pay estimated taxes if you expect to owe at least $1,000 in federal tax for the year

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The 'safe harbor' rule: pay 100% of your prior year's tax liability (110% if income exceeded $150,000) to avoid underpayment penalties

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Set aside 25–30% of every payment received to cover estimated taxes and avoid cash flow surprises

Who Must Pay Estimated Taxes

If you're self-employed, an Independent Contractor, or a Sole Proprietor and expect to owe at least $1,000 in federal income taxes for the year, you must make quarterly estimated tax payments¹. There's no withholding on freelance payments — when a client pays your Invoice, the full amount hits your account with no taxes deducted. This is why Self-Employment Tax and estimated taxes are two of the biggest financial adjustments new freelancers face. Missing quarterly deadlines results in an underpayment penalty calculated at the federal funds rate plus 3% — not catastrophic, but avoidable.

How to Calculate Your Quarterly Payment

The simplest approach is the 'safe harbor' method: pay at least 100% of your prior year's total tax liability (or 110% if your prior year income exceeded $150,000) spread equally across four quarters. This guarantees no underpayment penalty regardless of how much you actually earn. Alternatively, estimate your current-year income, calculate the expected tax liability, subtract any other withholding, and divide by four. Many freelancers use accounting software or a CPA to help project this. As a rule of thumb, reserving 25–30% of each invoice payment into a dedicated tax savings account covers most freelancers' estimated tax obligations.

Estimated Tax Deadlines

The four quarterly estimated tax deadlines for most taxpayers: Q1 (January–March) due April 15; Q2 (April–May) due June 15; Q3 (June–August) due September 15; Q4 (September–December) due January 15 of the following year². You can pay estimated taxes online at IRS Direct Pay or through the IRS Online Account at no cost. Most states that have income tax also require quarterly estimated payments — dates may differ slightly from the federal schedule. Track your quarterly payments carefully — you'll need to report them on your annual return to claim credit against your final tax bill.

References

IRS — Estimated Taxes ↗

irs.gov

SBA — Pay Taxes ↗

sba.gov

Last updated: June 9, 2026

Related Terms

Self-Employment Tax

A US federal tax consisting of Social Security and Medicare contributions that self-employed individuals must pay, covering both the employee and employer portions typically split in traditional employment.

Tax Deduction

A business or personal expense that can be subtracted from gross income to reduce the total taxable income, thereby lowering the amount of tax owed.

Business Expense

A cost incurred in the ordinary course of running a business that may be deductible from taxable income, reducing the total tax owed.

1099 Form

A series of IRS tax forms used to report income received from sources other than an employer, including freelance payments, contractor fees, and other non-wage income.

Freelancer

A self-employed individual who provides services to clients on a project or contract basis rather than as a permanent employee of any single organization.

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