What is Form 1040-ES?
Form 1040-ES, Estimated Tax for Individuals, exists because U.S. income tax is pay-as-you-earn. Employees satisfy that through paycheck withholding; everyone else — the self-employed, gig workers, investors, landlords, retirees with large distributions — satisfies it by making four estimated payments across the year.
The package includes a worksheet to calculate what you'll owe (income tax plus self-employment tax) and four payment vouchers. You generally need to make estimated payments if you expect to owe $1,000 or more after withholding and credits.
Who files Form 1040-ES?
- Self-employed people and freelancers — Schedule C filers paying both income tax and self-employment tax.
- Independent contractors receiving 1099-NEC income with no withholding.
- Landlords and investors with significant rental income, dividends, interest, or capital gains.
- Retirees and others whose withholding won't cover their tax bill.
Deadlines
Estimated payments are due in four installments: April 15, June 15, September 15, and January 15 of the following year (adjusted for weekends/holidays). Note the uneven spacing — the second payment comes just two months after the first.
How to fill out Form 1040-ES
Estimate the year's income
Project your self-employment profit, investment income, and any other untaxed income for the year.
Work the 1040-ES worksheet
It walks through deductions, income tax, and self-employment tax to produce a total estimated liability.
Apply the safe harbor
Paying 100% of last year's total tax (110% if your AGI topped $150k) through the year protects you from underpayment penalties even if you earn more.
Divide into four and pay quarterly
Pay online via IRS Direct Pay or EFTPS (no voucher needed), or mail a check with the printed voucher for that quarter.
Adjust as the year unfolds
Big new contract or a slow quarter? Recalculate and change the remaining payments — the worksheet supports mid-year corrections.