You generally need to pay quarterly estimated tax if you expect to owe $1,000 or more when you file, after subtracting withholding and refundable credits. That usually means freelancers, sole proprietors, partners, S corporation shareholders and anyone with sizable untaxed income such as rent, interest or capital gains. For 2026 income the payments are due April 15, June 15 and September 15, 2026, and January 15, 2027.
The U.S. tax system is pay-as-you-go. If you are an employee, withholding from each paycheck takes care of it. If you earn money that nobody withholds tax from, such as freelance income, business profit, rental income, interest, dividends or capital gains, the IRS expects you to pay during the year through quarterly estimated tax payments. Skip them when you should have paid, and you can owe an underpayment penalty even if you pay everything by the April deadline.
This guide explains who has to pay, the safe harbor rules that protect you from the penalty, the 2026 due dates and how to work out an amount. The quarterly estimated tax calculator gives you a payment figure for each quarter.
Who needs to pay quarterly estimated taxes?
According to the IRS, individuals, including sole proprietors, partners and S corporation shareholders, generally have to make estimated payments if they expect to owe $1,000 or more when they file, after subtracting withholding and refundable credits.
Common situations:
- freelancers, contractors and gig workers paid on Form 1099,
- sole proprietors and partners in a business,
- landlords with rental profit,
- investors with significant interest, dividends or capital gains,
- retirees with pension or IRA withdrawals that have little or no withholding,
- employees with a large side income.
You generally do not need to pay estimated tax for the current year if you had no tax liability for the full prior year and were a U.S. citizen or resident for that whole year.
What are the safe harbor rules?
You will usually avoid the underpayment penalty if your withholding plus timely estimated payments cover at least the smaller of:
- 90% of the tax for the current year, or
- 100% of the tax shown on last year’s return (the prior year must have been a full 12 months).
If your prior-year adjusted gross income was more than $150,000 ($75,000 if married filing separately), the prior-year figure rises to 110%. Farmers and fishermen who get at least two-thirds of their gross income from those activities use 66⅔% instead of 90%.
The prior-year rule is the easiest to use when income is rising, because you know the number in advance. If last year’s tax was $12,000 and your AGI was under $150,000, paying $3,000 a quarter protects you from the penalty even if this year turns out much better. You would still owe the remaining balance in April, but without the penalty.
When are 2026 estimated tax payments due?
For income earned in 2026, Form 1040-ES lists these dates:
- April 15, 2026 for income from January 1 to March 31
- June 15, 2026 for April 1 to May 31
- September 15, 2026 for June 1 to August 31
- January 15, 2027 for September 1 to December 31
The “quarters” are uneven: the second covers only two months and the fourth covers four. You do not have to make the January payment if you file your 2026 return by February 1, 2027 and pay the full balance with it. When a due date falls on a weekend or legal holiday, the payment is on time if made the next business day.
How do you estimate the amount?
The Form 1040-ES worksheet walks through the full calculation. In outline:
- Estimate your total income for the year, including business profit after expenses.
- Subtract deductions (standard or itemized) to get taxable income, and calculate income tax.
- Add self-employment tax if you have net earnings from self-employment. It is 15.3% (12.4% Social Security plus 2.9% Medicare) on 92.35% of net earnings, with the Social Security part capped at the yearly wage base.
- Subtract expected withholding and credits.
- Compare the result with your safe harbor amount and divide the target by four.
Example: a freelance designer expects $70,000 of profit and no other income. Self-employment tax is about $9,890. Half of it, about $4,945, is deductible. After that deduction and the standard deduction, federal income tax might come to roughly $5,600, before any qualified business income deduction. The total is about $15,500, or roughly $3,875 a quarter. If last year’s total tax was only $11,000, paying $2,750 a quarter would meet the 100% safe harbor, with the balance due at filing.
Put money aside as you are paid. Moving 25% to 30% of each freelance payment into a separate savings account is a common rule of thumb that makes quarterly payments painless. The income tax calculator helps with the income tax piece.
Uneven income
If most of your income arrives late in the year, equal quarterly payments may be more than you need early on. The annualized income installment method on Form 2210 Schedule AI lets you match each payment to the income actually earned in that period. It takes more work, but it can remove or reduce a penalty for seasonal businesses or for someone who sells a large investment in the autumn.
An alternative for employees: more withholding
If you have a job as well as other income, you can raise your paycheck withholding instead of making separate payments. Submit a new Form W-4 to your employer with an extra amount per pay period. Withholding is treated as paid evenly through the year regardless of when it was actually taken, which can help if you realise late in the year that you are short.
How do you pay estimated tax?
The IRS accepts estimated payments through IRS Direct Pay from a bank account, your IRS Online Account, the Electronic Federal Tax Payment System, debit or credit card (processors charge a fee) or a check with a Form 1040-ES voucher. Many states have their own estimated tax requirements and dates, so check your state revenue department too.
What if you missed a payment?
Pay as soon as you can. The penalty works like interest on the amount that was late, for the time it was late, so a late payment costs less than no payment. Form 2210 calculates any penalty, and the IRS can waive it in some cases, such as a casualty, disaster, or retirement after age 62 or disability with reasonable cause.
Key points
- Expect to owe $1,000 or more after withholding? You probably need to pay quarterly.
- Pay at least 90% of this year’s tax or 100% (or 110%) of last year’s to avoid the penalty.
- 2026 dates: April 15, June 15, September 15 and January 15, 2027.
- Self-employed people need to include self-employment tax.
This is general information, not tax advice.