Individual Tax
Form 1040-ES
Form 1040-ES: Estimated Tax for Individuals
Quarterly federal estimated tax payments for self-employed individuals, investors, retirees, and others whose income is not subject to sufficient withholding.
Who Files Form 1040-ES
Self-employed taxpayers, freelancers, gig workers, partners in partnerships, S-Corp shareholders with significant pass-through income, investors with large capital gains, retirees with IRA distributions, and anyone who expects to owe $1,000+ when filing the annual return.
What Form 1040-ES Reports
Each voucher reports the federal income tax, self-employment tax, and any 3.8% Net Investment Income Tax owed for the current quarter. Underpayment penalties apply when total payments fall below the safe harbor (90% of current-year tax or 100% of prior-year tax, 110% if prior-year AGI exceeded $150,000).
Key Deadlines
- April 15: Q1 estimated payment
- June 15: Q2 estimated payment
- September 15: Q3 estimated payment
- January 15 of the following year: Q4 estimated payment
Common Mistakes
- Underpaying because your prior-year safe harbor amount was higher than expected
- Missing the bump from 100% to 110% safe harbor when prior-year AGI exceeded $150,000
- Not adjusting estimates after a major life event (RSU vesting, business sale, large capital gain)
- Forgetting state estimated tax payments: most states have their own quarterly estimated tax forms
Best Practices
- Set calendar reminders one week BEFORE each quarterly deadline (April, June, September, January). Late payments accrue Section 6654 underpayment penalties even if the year-end balance is zero.
- Pay through IRS Direct Pay or EFTPS rather than mailing a check. Direct Pay is free, has an immediate confirmation, and posts within 24 hours.
- After any large income event mid-year (RSU vesting, business sale, large 1099, capital gain), recompute the remaining quarterly estimates instead of assuming the prior plan still works.
- Use the 110 percent of prior-year tax safe harbor if your prior-year AGI exceeded 150K. It is often easier to satisfy than the 90 percent of current-year safe harbor.
- Always pay state estimated tax separately. Most states do not piggyback on the federal voucher and will assess their own underpayment penalty.
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Learn how TS CPA handles Form 1040-ESRelated Tax Forms
1040
Form 1040
The annual federal income tax return filed by US citizens and resident aliens to report income, deductions, credits, and tax liability.
1099 (Series)
Form 1099
A series of IRS forms used to report various types of non-employee income, including 1099-NEC for contractor payments, 1099-K for third-party payment processors, and 1099-DA for digital assets.
Related Tax Terms
Estimated Tax
Quarterly tax payments made by self-employed individuals, investors, and others whose income is not subject to sufficient withholding.
Self-Employment Tax
The Social Security and Medicare tax (15.3% combined) paid by self-employed taxpayers on their net earnings from self-employment.
Restricted Stock Unit (RSU)
A form of employer equity compensation that delivers shares (or cash equivalent) to an employee upon vesting, taxed as ordinary income at vesting.
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