If you earn income your employer isn’t withholding state tax from, you generally pay estimated state taxes in four quarterly installments to your state’s revenue department, using either a paper voucher mailed with a check or the state’s online payment portal. For the 2026 tax year, the payments are due April 15, June 15, and September 15, 2026, and January 15, 2027. Size each payment to reach a safe harbor of either 90% of your current-year tax or 100% of last year’s tax (110% if your prior-year adjusted gross income was over $150,000), and you’ll avoid underpayment penalties even if you still owe a balance at filing time.
Do You Actually Need to Make Estimated Payments
You likely need to pay if you receive income no one is withholding state tax from. That covers self-employment earnings, freelance and gig work, rental income, investment dividends, interest, and capital gains. Retirees taking pension or retirement account distributions without state withholding are in the same category.
Each state sets its own minimum liability threshold. The numbers range from as low as $100 in some jurisdictions to $1,000 or more in others, with $500 and $1,000 the most common trigger points. If your projected balance due after credits and any withholding falls below your state’s threshold, you can skip estimated payments and settle up when you file.
Nine states have no individual income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. Living in one of them removes the question for income sourced there. If you earn income in a different state that does tax it, that state can still require estimated payments from you regardless of where you live.
The 2026 Quarterly Deadlines
State estimated tax deadlines almost universally follow the federal quarterly schedule.1Internal Revenue Service. 2026 Form 1040-ES – Estimated Tax for Individuals For the 2026 tax year:
- First quarter: April 15, 2026
- Second quarter: June 15, 2026
- Third quarter: September 15, 2026
- Fourth quarter: January 15, 2027
All four dates fall on weekdays this cycle, so no weekend or holiday adjustments apply. Watch the spacing: only two months separate the first and second payments, but nearly four months separate the third and fourth. The June deadline catches people who assume every quarter is three months long.
You can skip the January 15 payment if you file your annual state return and pay the full remaining balance by early February. Most states mirror the federal rule allowing this when you file by February 1.1Internal Revenue Service. 2026 Form 1040-ES – Estimated Tax for Individuals
How Much to Pay Each Quarter
Safe harbor is the concept that protects you from penalties even when you still owe a balance at filing. Federally, you avoid the underpayment penalty if you’ve paid at least 90% of your current-year tax or 100% of the tax shown on your prior-year return, whichever is smaller.2Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax Most states with an income tax adopt the same percentages, though a handful set their own.
Higher earners face a bumped-up prior-year threshold. If your adjusted gross income exceeded $150,000 in the prior year ($75,000 if married filing separately), the prior-year safe harbor is 110% instead of 100%.2Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax This catches many self-employed professionals off guard.
The simplest calculation starts with your prior-year state return. Find the total tax liability line, not the amount owed or refunded at filing. Divide that number by four, multiply by 1.10 first if you’re over the $150,000 AGI threshold, and pay that amount each quarter. You may slightly overpay, but any excess comes back as a refund rather than a penalty.
If your income is changing meaningfully, calculate more precisely. Take your expected 2026 adjusted gross income, apply your state’s brackets, subtract anticipated credits and any withholding, and divide the remaining balance by four. State income tax rates run from flat rates under 3% in some states to graduated rates above 13% in the highest brackets. Your state revenue agency’s website publishes the current brackets and usually a worksheet built for this calculation.
How to Send the Payment
Each state issues its own voucher form for estimated payments. Fill in your Social Security number or ITIN, the tax year, and which quarter the payment covers. Getting the quarter wrong is a common mistake that can trigger an underpayment notice for one period while a credit sits unused in another. Double-check that the period on the voucher matches the deadline you’re paying toward.
Paying by Mail
Send the completed voucher with a check or money order to the processing address in your state’s estimated tax instructions. That address is often different from the one used for annual returns, so verify it each year. Under federal law, a U.S. Postal Service postmark on or before the deadline counts as timely payment even if the envelope arrives later.3Office of the Law Revision Counsel. 26 USC 7502 – Timely Mailing Treated as Timely Filing and Paying Most states recognize the same rule. Certified mail gives you a dated receipt if you’re cutting it close.
Paying Online
Every state with an income tax now offers an online payment portal, and this is the fastest way to confirm receipt. On your state revenue website, choose the payment section and select “estimated tax” as the payment type along with the correct tax year and quarter. ACH bank transfers are typically free. Credit and debit cards work too but carry processor convenience fees of roughly 2% to 3%. On a $5,000 quarterly payment, that runs $100 to $150 in avoidable fees compared to paying from a bank account.
Whichever method you use, save the confirmation number or mailing receipt. If a payment goes missing or lands on the wrong period, that record is your fastest route to a correction.
When Income Is Uneven or Seasonal
Equal quarterly payments break down when earnings are lumpy. A real estate agent whose deals close in summer, or a retailer whose profits concentrate in the holidays, would overpay in slow quarters and risk underpaying in busy ones. The annualized income installment method lets you size each quarterly payment to match the income you actually earned during that period.2Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax
The idea is straightforward. Instead of dividing annual tax by four, you calculate tax on income earned through each quarterly cutoff, annualize it, and pay the appropriate percentage. Your first-quarter payment may be very small if income hasn’t ramped up, and your fourth-quarter payment absorbs the bulk. Most states that follow federal estimated tax rules also accept the annualized method. Federally, you document the uneven payments on Schedule AI of Form 2210.4Internal Revenue Service. Estimated Tax Check whether your state requires a similar attachment.
If your income simply jumps or falls midyear without a seasonal pattern, recalculate your remaining payments at any time. Raise future installments when a windfall lands, or lower them when income drops. There’s no need to amend earlier quarters.
One boundary worth noting: if at least two-thirds of your gross income comes from farming or fishing, you can make a single payment by January 15, 2027, instead of four quarterly installments, or skip estimated payments entirely by filing and paying in full by March 1, 2027.5Internal Revenue Service. Farmers and Fishermen Most states extend comparable treatment, though exact filing deadlines vary.
Penalties and Waivers
When you underpay, your state charges interest on the shortfall from each installment’s due date until you pay it. The rate varies by state and often floats with the federal rate or the prime rate; some states add a flat percentage on top. Because interest runs separately on each missed quarter, skipping the April payment and catching up in September still leaves you owing interest for those five months even though the annual total eventually gets paid.
The federal structure applies the underpayment rate set under IRC ยง 6621 to the gap between what you owed each quarter and what you paid, running from each due date until either the payment date or the April filing deadline, whichever comes first.2Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax Most states follow a parallel structure.
Waivers exist for genuine hardship. Federally, the IRS will reduce or eliminate the underpayment penalty if you retired after reaching age 62 or became disabled during the tax year and the underpayment resulted from reasonable cause, or if a casualty, disaster, or other unusual circumstance made imposing the penalty inequitable.6Internal Revenue Service. Instructions for Form 2210 (2025) Taxpayers in federally declared disaster areas often receive automatic deadline extensions without needing to ask. Many states offer comparable waiver provisions, so if a real emergency disrupted your payments, contact your state revenue department before assuming the penalty is final.