Quarterly Tax Estimator for Self-Employed 2026 — How Much Do I Owe the IRS?
Last updated: June 20267 min read2026 IRS deadlines included
When you're self-employed, no employer withholds taxes from your paycheck. That means you're responsible for paying the IRS four times a year — and if you miss a payment or underpay, you'll owe penalties on top. This calculator tells you exactly how much to pay each quarter in 2026, gives you the payment deadlines, and flags penalty risks before they happen.
Minimum annual tax bill that triggers quarterly payment requirement
Who Has to Pay Quarterly Estimated Taxes?
You're required to make quarterly estimated tax payments if you expect to owe at least $1,000 in federal taxes for the year after subtracting withholding and credits. This includes:
Freelancers and independent contractors receiving 1099 income
Sole proprietors and single-member LLC owners
S-Corp owners taking distributions beyond their W-2 salary
Anyone with significant side hustle income alongside a W-2 job
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The underpayment penalty in 2026: The IRS charges interest on underpaid quarterly taxes at the federal short-term rate plus 3% — currently around 7–8% annually. On a $5,000 underpayment, that's $350–$400 in penalties. Easily avoided with proper planning.
2026 Quarterly Tax Payment Deadlines
Quarter
Income Period
Payment Due
Status
Q1 2026
January 1 – March 31
April 15, 2026
Past due
Q2 2026
April 1 – May 31
June 16, 2026
Due soon
Q3 2026
June 1 – August 31
September 15, 2026
Upcoming
Q4 2026
September 1 – December 31
January 15, 2027
Upcoming
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Safe Harbor rule: You can avoid underpayment penalties entirely by paying either (a) 100% of last year's tax liability, or (b) 90% of this year's estimated tax — whichever is smaller. If last year's AGI exceeded $150,000, use 110% of last year's liability.
How to Calculate Your Quarterly Payment
Your quarterly payment covers self-employment tax, federal income tax, and (in most states) state income tax. Here's the full picture, including two pieces most calculators miss:
Self-employment tax: 15.3% on net self-employment income up to $184,500, then 2.9% above that. You deduct half of SE tax from gross income before calculating income tax.
Additional Medicare Tax: An extra 0.9% applies once your combined income exceeds $200,000 (single) or $250,000 (married filing jointly). This is frequently missed in simplified calculators but matters for higher earners.
QBI deduction (Section 199A): Most self-employed filers can deduct 20% of their qualified business income before calculating federal income tax. This is one of the largest deductions available to freelancers and is often overlooked entirely.
Federal income tax: Based on your total taxable income (after SE deduction and QBI deduction), filing status, and standard deduction.
State income tax: Varies — 9 states have no income tax; others range from 2% to 13%.
Divide your estimated annual tax by 4 to get your quarterly payment. The calculator below does all of this automatically — including the QBI deduction and Additional Medicare Tax that simpler tools skip.
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Why QBI matters: On $80,000 of net business income, the 20% QBI deduction shields $16,000 from federal income tax — potentially saving $2,000–$3,500 depending on your bracket. Skipping this in a calculator significantly overstates what you actually owe.
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Simple rule of thumb: Set aside 25–30% of every payment you receive. For most freelancers in the 22% federal bracket, this covers both SE tax and income tax with a small buffer.
Free Quarterly Tax Calculator
Personalized Estimate · Free · 2026 Tax Rates
Quarterly Tax Estimator
Answer 6 questions. Get your exact quarterly payment, a 2026 payment calendar, and penalty warnings.
0 of 6
Question 1 of 6
What's your expected gross self-employment income this year?
Your total revenue before any business expenses are deducted.
$
$0$300k
Question 2 of 6
What are your estimated annual business expenses?
Software, equipment, home office, professional fees, etc. These reduce your taxable income.
$
$0$100k
💡 Not sure? Most freelancers deduct 10–20% of gross income in business expenses. Enter 0 if you're unsure — you can refine later.
Question 3 of 6
What's your federal filing status?
This determines your standard deduction and tax bracket thresholds.
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Single
Standard deduction: $15,750 (2026)
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Married Filing Jointly
Standard deduction: $31,500 (2026)
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Head of Household
Standard deduction: $23,625 (2026)
Question 4 of 6
Do you have other W-2 income this year?
A spouse's W-2 salary or your own part-time job affects your total tax bracket.
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No — self-employment is my only income
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Yes — under $50,000 in W-2 income
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Yes — $50,000 or more in W-2 income
Question 5 of 6
Which state do you live in?
State income tax adds to your quarterly payment in most states. Note: we use an average rate for your state's tax category, not your exact state bracket.
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No state income tax
Texas, Florida, Nevada, Washington, Wyoming, South Dakota, Alaska, New Hampshire, Tennessee
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Low state tax (under 5%)
Most Midwest and Southeast states
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Mid state tax (5–7%)
Most Northeast and Mountain states
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High state tax (8%+)
California (up to 13.3%), New York, New Jersey, Minnesota, Hawaii
Question 6 of 6
Have you already made any estimated tax payments this year?
We'll subtract what you've paid to show your remaining balance and penalty risk.
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No payments made yet
This is my first year or I haven't paid Q1/Q2 yet
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Made some payments
Paid Q1 or Q2 but want to check if I'm on track
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On track — paid the right amount so far
Just want to know my upcoming Q3/Q4 payments
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📩 Get Your 2026 Tax Calendar
We'll email you a printable payment calendar with deadlines, safe harbor amounts, and a quarterly checklist.
Missing a quarterly deadline doesn't mean you owe the full penalty immediately. The IRS calculates underpayment penalties based on how much you owed vs. what you paid, and for how long. The best course of action: pay as soon as possible to stop the penalty from growing. You'll calculate and report any underpayment penalty on Form 2210 when you file your annual return.
Technically yes — you can make a lump-sum payment by January 15 of the following year. However, you'll still owe underpayment penalties for Q1, Q2, and Q3. The penalty is calculated per quarter, so paying late on Q1 still results in a Q1 penalty even if you catch up in Q4. Quarterly payments avoid this entirely.
The easiest method is IRS Direct Pay (pay.gov) — free, no registration required, instant confirmation. You can also pay via the IRS2Go mobile app, EFTPS (Electronic Federal Tax Payment System — recommended if you pay regularly), or by mailing a check with Form 1040-ES. EFTPS allows you to schedule all four payments in advance at the start of the year.
Yes, in most states. Each state has its own estimated tax payment system, and most follow a similar quarterly schedule as the IRS (though deadlines can vary slightly). You pay state and federal estimated taxes separately. States without income tax (Texas, Florida, Nevada, etc.) have no estimated state tax requirement.
The Safe Harbor rule lets you avoid underpayment penalties by paying a predetermined "safe" amount rather than trying to precisely estimate your current-year tax. You qualify if you pay at least: (a) 90% of your current year's tax liability, OR (b) 100% of last year's tax liability (110% if last year's AGI exceeded $150,000). Most self-employed people use the prior-year safe harbor — it's simpler and doesn't require forecasting your current year income accurately.
Possibly. Your W-2 employer withholds taxes on your salary, which counts toward your annual tax liability. If that withholding covers your total tax bill (including on freelance income), you may not need to make separate quarterly payments. The test: if you'll owe more than $1,000 in taxes after subtracting W-2 withholding, quarterly payments are required. You can also ask your W-2 employer to withhold extra each paycheck to cover your freelance tax obligation.