Q2 Estimated Tax Calculator โ June 15, 2026 Deadline
Calculate your Q2 2026 estimated tax payment due June 15. Enter YTD income, Q1 payment made, and projected full-year income to find your exact Q2 amount.
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Total self-employment / 1099 / business income after expenses $
Best estimate for entire 2026 tax year $
Enter $0 if you skipped Q1 $
From your 2025 Form 1040 for safe harbor calculation $
Used to determine 100% vs 110% safe harbor %
Your state's average effective rate (0 if no state tax) $
YTD federal withholding from W-2 jobs $0
Q2 Payment Due June 15
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Projected Annual Tax
$0
Safe Harbor Total
On Track
Q1 Status
2026 Quarterly Payment Schedule
| Quarter | Period | Due Date | Required | Status |
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Tax Calculation Breakdown
Q2 2026 Estimated Tax โ Key Facts
Q2 estimated tax is due June 15, 2026. It covers income earned April 1 through May 31, 2026. Along with Q1 (April 15), Q3 (September 15), and Q4 (January 15, 2027), these four payments replace paycheck withholding for self-employed workers and those with significant non-wage income.
Safe Harbor Rule
Option A: Pay 90% of current year actual tax liability
Option B: Pay 100% of prior year tax (or 110% if 2025 AGI > $150,000)
Safe Harbor = whichever is smaller โ no underpayment penalty if you meet either
Option B: Pay 100% of prior year tax (or 110% if 2025 AGI > $150,000)
Safe Harbor = whichever is smaller โ no underpayment penalty if you meet either
Self-Employment Tax Included
Maria, self-employed, $96,000 projected income:
SE tax: $96,000 ร 92.35% ร 15.3% = $13,564
SE deduction: $13,564 / 2 = $6,782
Federal income tax on $96,000 โ $16,100 โ $6,782 = ~$13,200
Total annual tax: ~$26,764 | Per quarter: ~$6,691
Q2 payment: ~$6,691 (or safe harbor amount if lower)
SE tax: $96,000 ร 92.35% ร 15.3% = $13,564
SE deduction: $13,564 / 2 = $6,782
Federal income tax on $96,000 โ $16,100 โ $6,782 = ~$13,200
Total annual tax: ~$26,764 | Per quarter: ~$6,691
Q2 payment: ~$6,691 (or safe harbor amount if lower)
Extended
Full-Year Recalibration
Adjust Q2โQ4 payments if your income changed significantly from Q1 estimates
Full-Year Recalibration
If your income changed significantly from Q1 estimate, recalibrate your Q2โQ4 payments below.
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When to Recalibrate
- Income up significantly: Increase Q2โQ4 payments proportionally to avoid a large year-end bill + penalty
- Income down significantly: Reduce payments โ you may have overpaid Q1, which will be credited at year-end
- New income source: Add the new income to your projection and recalculate Q2 immediately
- Large one-time payment: Consider making an extra estimated payment within the quarter it occurs
Annualized Income Installment Method
If your income is highly seasonal (e.g., you earn 70% in Q3โQ4), use IRS Form 2210 Schedule AI to calculate each quarterly payment based on actual year-to-date income rather than equal installments. This can significantly reduce Q1 and Q2 payments when income is back-loaded.
Frequently Asked Questions
When is the Q2 2026 estimated tax payment due?
The Q2 2026 estimated tax payment covers income from April 1 through May 31, 2026 and is due June 15, 2026. Note the unusual timing: Q1 covers Jan 1โMar 31 (due April 15), Q2 covers AprilโMay (due June 15), Q3 covers JuneโAug (due September 15), and Q4 covers SeptโDec (due January 15, 2027). Each payment covers a different number of months.
How do I calculate my Q2 estimated tax?
The simplest method: divide your expected full-year tax liability by 4. The safe harbor method lets you pay either 100% of your prior year tax (110% if prior year AGI exceeded $150,000) divided into 4 equal payments, or 90% of your current year actual tax. You owe no underpayment penalty if you meet either safe harbor. This calculator uses both methods and shows you the lower required payment.
What happens if I underpay my Q2 estimated tax?
If your total estimated payments are less than the safe harbor amount, you will owe an underpayment penalty on Form 2210. The penalty rate is the federal short-term rate + 3%, currently around 7% annually. It applies to the underpaid amount from the due date of each quarterly payment through the date you pay or the return due date. The penalty is calculated separately for each quarter.
I had a much higher income in Q1-Q2 than expected. How do I recalibrate?
If your income is running significantly higher than your Q1 estimate, you have two options: (1) use the annualized income installment method (Form 2210 Schedule AI), which lets you pay based on actual year-to-date income rather than an equal quarterly split; or (2) simply increase your Q2 payment to catch up and pay more in Q3/Q4 based on updated projections. This calculator shows the recalibrated Q2 amount if income changed.
Do I owe self-employment tax in addition to income tax?
Yes. If you are self-employed, your estimated payments must cover both federal income tax and self-employment tax (15.3% on the first $184,500 of net SE income, 2.9% above that). You can deduct half of SE tax as an above-the-line deduction, which reduces your income tax. This calculator includes the SE tax deduction in the calculation for self-employed filers.