Estimate your 2026 quarterly estimated tax payments. See due dates, safe harbor minimums, and SE tax breakdown for freelancers and self-employed workers.
Q1: April 15, 2026 · Q2: June 16, 2026 · Q3: September 15, 2026 · Q4: January 15, 2027. Missing a quarterly payment triggers an 8% annualized underpayment penalty. The safe harbor rule protects you if you pay at least 100% of your prior year tax (110% if your AGI was over $150,000) or 90% of your current year liability. Use the calculator above to determine your exact safe harbor payment amount.
The U.S. tax system operates on a pay-as-you-go basis. W-2 employees have taxes withheld automatically each paycheck. Self-employed individuals, freelancers, independent contractors, and those with significant investment or rental income do not have automatic withholding — so they must estimate their annual tax liability and pay one-quarter of it every quarter throughout the year.
For self-employed taxpayers, quarterly payments must cover both self-employment tax (15.3% on 92.35% of net SE income) and federal income tax. SE tax replaces the FICA taxes an employer would withhold from a W-2 paycheck. However, self-employed filers get to deduct half of the SE tax (the employer equivalent portion) from their adjusted gross income, which reduces the federal income tax portion of the calculation.
Most self-employed taxpayers should also account for state quarterly estimated taxes, which are due on similar schedules in most states. The federal calculator above does not include state estimated taxes — check your state revenue department for state-specific payment amounts and due dates.
Priya is a single freelance designer in Arizona earning $80,000 net in 2026. Her prior year tax was $12,000. Here is her quarterly tax calculation.
Priya can protect herself from underpayment penalties by paying $3,000 per quarter (100% of her prior year tax). However, at year-end she will still owe the difference between $12,000 paid and her $19,127 actual liability — approximately $7,127 due April 15, 2027 plus any state taxes. Planning ahead prevents the April surprise.
Variable income makes estimation harder
Freelancers and contractors often have uneven income across quarters. You can make unequal quarterly payments as long as you meet the safe harbor threshold. The IRS annualized income installment method (Form 2210 Schedule AI) allows you to base each quarter's payment on the actual income earned in that quarter — helpful if your income is heavily back-weighted toward year-end.
Business deductions reduce your quarterly payments
Your quarterly estimated taxes are based on net SE income after all deductible business expenses: home office, mileage ($0.70/mile in 2026), equipment, software, health insurance premiums, and retirement contributions (SEP-IRA up to 25% of net SE income). Maximizing deductions legally reduces both SE tax and income tax, and lowers your quarterly payment obligation throughout the year.
The 110% rule for high earners
If your prior year adjusted gross income exceeded $150,000, the safe harbor threshold increases to 110% of your prior year tax liability (not 100%). This means high-income taxpayers must pay slightly more per quarter to avoid underpayment penalties. The 90% of current year option remains available as an alternative, which can be advantageous in years where income drops significantly from the prior year.
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You must pay quarterly estimated taxes if you expect to owe $1,000 or more in federal taxes and you receive income not subject to withholding — including self-employment income, freelance income, rental income, investment income, or alimony. W-2 employees generally do not need to pay quarterly taxes because their employer withholds taxes from each paycheck. If you are both a W-2 employee and have self-employment income, you may be able to increase your W-4 withholding to cover your self-employment tax liability instead of making separate quarterly payments.
The 2026 quarterly estimated tax due dates are: Q1 (January 1–March 31 income) due April 15, 2026; Q2 (April 1–May 31 income) due June 16, 2026; Q3 (June 1–August 31 income) due September 15, 2026; Q4 (September 1–December 31 income) due January 15, 2027. Note that Q2 covers only two months while Q3 and Q4 cover three months each. Pay using IRS Direct Pay, EFTPS, or Form 1040-ES. If a deadline falls on a weekend or federal holiday, it moves to the next business day.
The IRS safe harbor protects you from underpayment penalties if you pay either (1) 100% of your prior year tax liability (110% if your prior year AGI exceeded $150,000), or (2) 90% of your current year tax liability. You must meet one of these thresholds across all four quarters. The safe harbor does not eliminate your tax bill — it only protects you from the 8% annualized underpayment penalty. Option 1 is often easier to calculate since it is based on your known prior year return.
Self-employment (SE) tax is 15.3% applied to 92.35% of your net SE income (92.35% accounts for the fact that employees only pay half). For example, $80,000 in net SE income × 0.9235 = $73,880 × 15.3% = $11,304 in SE tax. You can then deduct half of the SE tax ($5,652) from your income when computing federal income tax. Total quarterly payments should cover both your SE tax and your federal income tax. The calculator above does this calculation automatically and shows your safe harbor payment.
If you miss a quarterly estimated tax payment or underpay, the IRS charges an underpayment penalty at an annualized rate of 8% for 2026. The penalty is calculated on a per-quarter basis from the due date of the missed payment. If you miss Q2 but catch up in Q3, the penalty still applies to the Q2 shortfall for the period it was late. The IRS Form 2210 calculates the penalty automatically when you file. You can reduce or eliminate the penalty by meeting the safe harbor threshold or by qualifying for an exception.