Federal Quarterly Tax Form: Deadlines, Payments, and Penalties

The federal quarterly tax form most individuals need is Form 1040-ES. It covers estimated income tax and self-employment tax for people whose income isn’t fully covered by payroll withholding: sole proprietors, partners, S corporation shareholders, freelancers, gig workers, landlords, and investors. You send a payment voucher with each of four installments across the year rather than paying the whole balance at filing time. C corporations and estates or trusts use different forms, covered below.

Who Has to Make Quarterly Payments

You generally must pay estimated tax if you expect to owe $1,000 or more for the year after subtracting withholding and refundable credits, and your withholding and credits will cover less than 90% of your current-year tax or 100% of your prior-year tax. That prior-year threshold rises to 110% if your prior-year adjusted gross income was over $150,000 ($75,000 if married filing separately).1Internal Revenue Service. Estimated Tax

If a W-2 job already pulls enough tax to cover your total liability, you don’t need to file quarterly vouchers even when you have side income. Some people skip 1040-ES entirely by filing a new Form W-4 with their employer asking for additional withholding, letting the extra amount from each paycheck absorb the tax on outside earnings.2Internal Revenue Service. Pay As You Go, So You Won’t Owe: A Guide to Withholding, Estimated Taxes, and Ways to Avoid the Estimated Tax Penalty Withholding counts as paid evenly across the year, which sidesteps the timing rules that trip up quarterly filers.

Which Form to Use

The right form depends on the filer:

  • Individuals, including sole proprietors, partners, and S corporation shareholders, use Form 1040-ES. This is the common case and covers both income tax and self-employment tax.3Internal Revenue Service. Estimated Taxes
  • C corporations that expect to owe $500 or more use the Form 1120-W worksheet. The IRS discontinued 1120-W as a separately filed form; the corporation keeps the worksheet in its own records and pays through EFTPS.4Internal Revenue Service. Instructions for Form 1120-W
  • Estates and trusts expecting to owe at least $1,000 after withholding and credits use Form 1041-ES.5Internal Revenue Service. Form 1041-ES – Estimated Income Tax for Estates and Trusts

The Four Deadlines

Federal estimated tax runs on four uneven periods:6Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax

  • 1st installment: April 15
  • 2nd installment: June 15
  • 3rd installment: September 15
  • 4th installment: January 15 of the following year

The gap between the first and second payments is only two months, and that June deadline is the one people miss most. When any due date falls on a weekend or legal holiday, it shifts to the next business day under 26 U.S.C. § 7503.7Office of the Law Revision Counsel. 26 USC 7503 – Time for Performance of Acts Where Last Day Falls on Saturday, Sunday, or Legal Holiday

Calculating Each Payment

Form 1040-ES includes an Estimated Tax Worksheet. Start with a projection of the year’s income, subtract expected deductions and credits, and apply the current tax rates to reach an annual total. Divide by four for each installment. Last year’s return is the most useful starting point.

You don’t need to predict income perfectly. Under 26 U.S.C. § 6654, you avoid the underpayment penalty if your combined withholding and estimated payments equal at least the lesser of 90% of your current-year tax or 100% of your prior-year tax, with the prior-year figure rising to 110% if your prior-year AGI was over $150,000 ($75,000 if married filing separately).6Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax When current-year income is hard to forecast, paying 100% (or 110%) of last year’s tax in four equal installments guarantees safe-harbor protection no matter how the year turns out.

If income shifts partway through the year, recalculate. Redo the worksheet with updated numbers and adjust the remaining installments. Nothing locks you into the original quarterly figure.3Internal Revenue Service. Estimated Taxes

Uneven or Seasonal Income

Equal quarterly payments assume income arrives in a steady stream. When it doesn’t, the annualized income installment method lets you base each payment on what you actually earned through that point in the year. The method applies escalating cumulative percentages of the year’s tax: 22.5% by the first deadline, 45% by the second, 67.5% by the third, and 90% by the fourth.6Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax Someone who earned nothing in Q1 and everything in Q4 can use it to avoid an April penalty.

To claim this treatment, file Form 2210 with Schedule AI attached to your annual return. Without those forms, the IRS calculates the penalty using equal quarterly installments and issues a notice.8Internal Revenue Service. Underpayment of Estimated Tax by Individuals, Estates, and Trusts

Ways to Pay

The IRS accepts estimated payments through several channels:9Internal Revenue Service. Payments

  • IRS Direct Pay: free bank transfer from a checking or savings account, schedulable up to a year ahead. The simplest option for most individuals.10Internal Revenue Service. Direct Pay with Bank Account
  • Electronic Federal Tax Payment System (EFTPS): free, but enrollment takes five to seven business days. Common for businesses because it handles multiple tax types and periods.11Electronic Federal Tax Payment System. Welcome to EFTPS
  • Credit or debit card through third-party processors. Credit card fees run 1.75–1.85% (minimum $2.50); personal debit cards cost a flat $2.10–$2.15. On large payments the credit card fee usually outweighs any rewards.12Internal Revenue Service. Pay Your Taxes by Debit or Credit Card or Digital Wallet
  • Same-day wire transfer through your bank, using the IRS Same-Day Taxpayer Worksheet. Bank fees vary.13Internal Revenue Service. Same-Day Wire Federal Tax Payments
  • Check or money order by mail, sent with the paper payment voucher from your 1040-ES package to the IRS address listed for your state.

Keep a confirmation regardless of method. Direct Pay and EFTPS generate electronic receipts; certified mail is worth the small cost for paper checks. Your online IRS account shows processed payments and running balance.

Underpayment Penalties

The underpayment penalty works like interest on the amount you should have paid but didn’t, running from each missed deadline until you pay or file the annual return. The IRS resets the rate every quarter based on the federal short-term rate plus three percentage points. For 2026, the rate is 7% in Q1 and 6% in Q2, and interest continues to accrue on the penalty itself until the balance is cleared.14Internal Revenue Service. Quarterly Interest Rates15Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty

Two paths avoid the penalty:

  • Meet the safe harbor: withholding plus estimated payments totaling at least 90% of the current year’s tax or 100% (110% above $150,000 AGI) of last year’s.
  • Owe less than $1,000 after withholding and credits when the return is filed. No penalty applies at that level regardless of whether you made estimated payments.1Internal Revenue Service. Estimated Tax

Waivers

Section 6654 authorizes the IRS to waive the penalty in two situations: when the underpayment resulted from a casualty, disaster, or unusual circumstance and imposing it would be inequitable, and when the taxpayer retired after reaching age 62 or became disabled during the tax year (or the preceding year) and the underpayment was due to reasonable cause rather than willful neglect.6Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax Request a waiver by filing Form 2210 with your return and checking the appropriate box in Part II.16Internal Revenue Service. Instructions for Form 2210

Special Cases Worth Knowing

Farmers and Fishermen

If at least two-thirds of your gross income comes from farming or fishing in either the current or prior year, a simplified schedule replaces the four-payment cycle. You can make a single estimated payment by January 15, or skip estimated payments entirely by filing the return and paying the full balance by March 1. If March 1 lands on a weekend or legal holiday, the deadline moves to the next business day.17Internal Revenue Service. Topic No. 416, Farming and Fishing Income

Applying a Prior-Year Overpayment

If last year’s return produced a refund, you can apply all or part of it toward this year’s estimated tax on the annual return. The IRS credits the amount as a payment toward your first quarterly installment, which can cover or reduce the April payment. The tradeoff is that the applied amount doesn’t come back to you as cash.