When Are Quarterly Estimated Taxes Due?

For the 2026 tax year, the four quarterly estimated tax payments are due April 15, 2026, June 15, 2026, September 15, 2026, and January 15, 2027. That last one lands in the following calendar year, which trips up people every single time. When folks ask us when are quarterly taxes due, that fourth date is the one they forget, because the brain files it under next year and then it slips. So when you map out when are quarterly taxes due across the year, write all four down at once, including the January date that closes out the prior year. The IRS confirms these exact 2026 dates in the 2026 Form 1040-ES package.

The mechanics are set by statute and they are not as tidy as you would expect. Payments fall on the 15th day of the 4th, 6th, and 9th months of your tax year, then the 15th day of the 1st month after the year ends. That spacing is deliberately uneven. Q1 covers January through March, Q2 covers April and May, Q3 covers June through August, and Q4 covers September through December. So your June payment only covers two months of income, while your January payment covers four. People assume the year splits into four tidy three-month chunks and it does not, which is why an evenly divided payment plan can still leave an early quarter short if your income front-loads. If a due date falls on a weekend or a legal holiday, the payment is on time if you send it the next business day, which is how the April date occasionally slides to the 16th or 17th in years with holidays. The underlying rules sit in the IRS estimated taxes overview.

Here is a worked example. Say you are a freelance designer who expects $90,000 of net self-employment income in 2026 with a projected total tax of $20,000 after the self-employment tax and the income tax. You divide $20,000 by four and send $5,000 on each of the four dates. By January 15, 2027, you have paid in $20,000 and you owe nothing more when you file. Clean. But if your income is lumpy and most of it hits in the fall, you can use the annualized income installment method to match payments to when you actually earned the money, which often lowers the required amount for the early quarters and shifts the weight to the September and January installments. A designer who earns $10,000 in the first half and $80,000 in the second half should not be paying a flat $5,000 in April, because the income that drives the tax had not arrived yet.

One edge case worth knowing. You can skip the January 15, 2027 payment entirely if you file your full 2026 return and pay the whole balance by February 1, 2027. That is a legitimate shortcut for people who close their books early. It does not save you any tax, but it collapses two deadlines into one and gets the year behind you.

We see this every year. A new client swears they paid all four installments, then we pull the IRS account transcript and find three payments and a missing September one, because September is busy and the deadline does not move for anybody. So when you are deciding when are quarterly taxes due and budgeting for them, set calendar alerts a week before each of the four dates. If your self-employment situation is complicated, our individual tax return preparation team builds the full payment schedule with you so when are quarterly taxes due is never a surprise. Ready to stop guessing? Start at our new client inquiry page.

You generally have to pay quarterly estimated tax if you expect to owe $1,000 or more in tax when you file, after subtracting your withholding and refundable credits. That $1,000 floor is the trigger. Once you cross it, the four deadlines apply to you, and when are quarterly taxes due becomes a live question rather than a hypothetical. Sole proprietors, partners in a partnership, S corporation shareholders, gig workers, landlords, and retirees with large investment income all land in this group because they have income that is not subject to regular payroll withholding. The $1,000 threshold and the categories of who must pay are spelled out in the IRS estimated tax FAQ.

The reason is simple. The federal tax system runs on pay-as-you-go. W-2 employees have tax pulled from every paycheck, so they meet their obligation automatically across the year without ever thinking about quarterly dates. If you earn money with no withholding, the IRS still wants its cut spread across the year, which is exactly why the four quarterly dates exist. So when are quarterly taxes due for a 1099 contractor is the same answer as for everyone else: April 15, June 15, September 15, and the following January 15. There is no separate calendar for the self-employed. The dates are universal. What changes from person to person is the amount, not the timing.

Worked example. A married couple, both W-2 earners, picks up a rental property that throws off $30,000 of taxable net rental income in 2026. Their day-job withholding does not cover the extra tax on that rental income, roughly $6,600 at a 22 percent marginal rate. They owe well over $1,000 beyond withholding, so they are now quarterly filers on that rental income. They have two clean options. Send four estimated payments of about $1,650 each, or bump up the withholding on one spouse’s W-4 to cover the gap, which sidesteps the quarterly schedule entirely because withholding is treated as paid evenly across the year no matter when it is actually withheld. That second option is the quiet favorite among dual-income households, because it means no four-times-a-year homework.

A second example shows the other end. A retiree pulling $120,000 a year from a brokerage account and Social Security may have little or no withholding on the investment income. If the tax on that comes to $14,000 and nothing is being withheld, that retiree is firmly a quarterly filer and owes roughly $3,500 on each of the four dates. Retirees often miss this because they spent forty years as W-2 employees who never touched an estimated payment. The shift from automatic withholding to self-directed quarterly payments is the part that catches them. A simple fix for retirees is to elect voluntary withholding on pension or IRA distributions using Form W-4P, which converts the obligation back into withholding and removes the need to track four dates at all.

That W-4 trick is the common mistake we fix every year, but in reverse. People with a side business assume they must pay quarterly when a household also has a big W-2. Often the cleaner move is to raise W-2 withholding instead of mailing four checks, since withholding counts as timely no matter when in the year it happens, while a late estimated payment does not. So the answer to who pays and when are quarterly taxes due depends on whether you can route the obligation through withholding instead. If your situation mixes wages, self-employment, and investment income, our tax compliance service sorts out who owes what and on which date. When you need a real answer on when are quarterly taxes due for your specific mix of income, reach our 1040 preparation team through the new client inquiry page.

The short answer is you pay enough to hit a safe harbor, and the safe harbor is the smaller of two targets. Pay 90 percent of your current year tax, or pay 100 percent of last year’s tax, whichever is less. If your prior-year adjusted gross income topped $150,000, that second number climbs to 110 percent of last year’s tax. Meet either target spread across the four dates and you owe no underpayment penalty on your quarterly taxes, even if you still have a balance due at filing. This is the part of when are quarterly taxes due that actually protects your wallet, because hitting the safe harbor caps your downside no matter how much your income grows. The safe harbor percentages are stated plainly on the IRS underpayment penalty page.

Why two targets? The current-year option works when your income is steady and predictable, because you can forecast 90 percent of it with confidence. The prior-year option is the safety net, because last year’s tax is a known, fixed number you can divide by four with no forecasting at all. For most people the 100 percent prior-year route is the easiest defensible target. Higher earners over the $150,000 AGI line use the 110 percent figure. The calculation and the rules for each path live in the estimated taxes guidance, and it pays to read which target fits your year before you start writing checks for your quarterly taxes.

Worked example. Your 2025 total tax was $24,000 and your 2025 AGI was $180,000, which puts you over the $150,000 line, so your safe harbor is 110 percent of $24,000, or $26,400. Divide by four and you send $6,600 on each of the four dates. Do that and you are penalty-proof for 2026 no matter how much your income jumps, even if your actual 2026 tax comes in at $40,000. You would still owe the $13,600 difference at filing, but no penalty rides along with it. That is the whole point of the prior-year safe harbor. It lets a growing business pre-pay a known amount, settle the rest in April without a surcharge, and keep that extra cash working in the meantime instead of overpaying the government in advance.

Run the other direction and you see why the choice matters. Suppose your prior year was a slow one and you only owed $8,000, but 2026 is booming toward $50,000 of tax. The 100 percent prior-year safe harbor is just $8,000, so four payments of $2,000 keep you penalty-free while you hold the rest of your cash until April. Meeting the 90 percent current-year target would have meant paying $45,000 across the year, which is a brutal difference in cash flow for the exact same penalty protection. The catch with leaning on a small prior year is the April surprise. You will hand over the remaining $42,000 when you file, so park that money somewhere safe through the year rather than spending it, because the bill still comes, just later.

The mistake we see every year is a client who had a huge income year, then pays based only on 90 percent of the new, larger number and strains cash flow doing it, when 110 percent of the smaller prior year would have satisfied the safe harbor for far less out the door each quarter. So when are quarterly taxes due matters, but how much you send on each date is just as important, and the prior-year number is often the cheaper legal path. Our tax strategy consulting team runs both safe harbor numbers and picks the lower one for you, then sizes each of your quarterly taxes to match. If you want that math done right, start at the new client inquiry page.

If you miss a quarterly taxes deadline or underpay, the IRS charges an underpayment penalty that works like interest on the shortfall for the days it stays unpaid. It is not a flat fine. The penalty is calculated quarter by quarter using the federal short-term rate plus three percentage points, and that rate resets each calendar quarter. So a late September payment that you catch up in October only racks up penalty for those weeks, not the whole year. That is the good news buried inside when are quarterly taxes due. Paying late beats not paying at all, because the meter only runs while the money is actually short. The full mechanics sit on the IRS underpayment of estimated tax penalty page.

The mechanics matter and they are stricter than most people expect. Each of the four installments is tested on its own due date. You can be fully paid up by year end and still owe a penalty on your quarterly taxes if an early installment was short, because the system does not let a big Q4 payment retroactively cover a thin Q1. The rate has hovered around 7 to 8 percent annualized in recent periods, so the cost is real but rarely catastrophic on a small slip. There is one helpful exception. If your total tax for the year after withholding is under $1,000, there is no penalty at all, which is the same $1,000 floor that decides whether you owed quarterly taxes in the first place. You compute the penalty on the form referenced in the IRS estimated tax FAQ.

Worked example. You owed $5,000 for your Q2 installment due June 15, 2026, but you did not pay until you filed in April 2027, about ten months late. At roughly an 8 percent annual rate, the penalty on that one installment runs about $5,000 times 8 percent times ten twelfths, or roughly $333. Annoying, but not ruinous. Now flip it. If you had skipped all four installments of $5,000 each, the penalty stacks across all four with each clock starting on its own due date, and the total climbs past a thousand dollars fast because the April and June installments sit unpaid the longest. The lesson is that the early dates cost the most when missed, because their meter runs longest, so if cash is tight, prioritize catching up the oldest missed installment first.

There are real waivers, and they get missed constantly. The IRS can waive the penalty if you failed to pay because of a casualty, disaster, or other unusual circumstance where charging the penalty would be unfair, or if you retired after reaching age 62 or became disabled during the tax year, and the underpayment was due to reasonable cause rather than willful neglect. These are not automatic. You have to claim them on the underpayment form and explain the facts. Federally declared disaster areas are the most common path, because the IRS routinely postpones estimated payment due dates for affected counties, and a payment that looks late on paper is actually on time under the disaster relief notice covering your address.

We see this every year. A client ignores the penalty notice assuming it is wrong, when it is almost always correct, and the real move is to check whether one of those waivers applies before paying. If you are staring at one of these, our IRS notice assistance team reviews whether the penalty can be reduced or waived, and our tax compliance service keeps the next four payments on time so it never repeats. Settle a penalty question on your quarterly taxes or set up clean payments through the new client inquiry page.

You pay quarterly estimated tax electronically through IRS Direct Pay, your IRS Online Account, the EFTPS system, a debit or credit card, or by mailing a paper Form 1040-ES voucher with a check. Electronic is faster and gives you a confirmation number, which matters when a payment goes missing and you need proof of the date. For the question of when are quarterly taxes due, the date you initiate an electronic payment is your payment date, and a mailed check is treated as paid on the postmark date, so a check postmarked on the deadline counts as on time even if it clears later. The full menu of methods lives on the IRS payments page.

The methods differ in setup and it is worth picking the right one for how you operate. Direct Pay is free, needs no enrollment, and pulls straight from your bank account, but it only handles one payment at a time and keeps no long-term dashboard. Your IRS Online Account lets you view your full payment history in one place, which is the cleanest way to confirm you actually hit all four installments of your quarterly taxes when filing season arrives. EFTPS lets you schedule all four payments up to 365 days ahead in a single sitting, though new individual enrollments have been steered toward the Online Account. Card payments work but carry a processing fee that usually runs under two percent, which can be worth it for the rewards on a large payment. The deeper rules on timing sit in the estimated taxes section.

Worked example. You owe four installments of $4,500 for 2026. In January 2026 you log into EFTPS and schedule all four at once, dated April 15, June 15, September 15, and January 15, 2027. You never touch it again and every payment lands on its due date automatically. That set-and-forget approach is the single best defense against missing the September date, which is the one busy people drop because it falls in the middle of a working quarter with no other tax deadline near it. If you prefer hands-on control, use Direct Pay each quarter and save the confirmation number in the same folder so you have a clean record of every one of your quarterly taxes at filing time.

A second tactic saves a payment outright. You can apply a prior-year refund directly to your first quarterly installment, which knocks out the April payment without writing a check. If your 2025 return shows a $4,500 overpayment, you elect to apply it forward and your April 15, 2026 installment is already covered. The money never leaves your control through a refund and then a separate payment. It simply rolls forward. One caution. Once you elect to apply a refund to next year, that election is locked in and the IRS will not reverse it to send you cash, so only roll forward the exact amount you genuinely want applied to your quarterly taxes for the coming year, and take the rest as a refund if you need the cash on hand.

The mistake we see every year is a client who mailed a check but cannot prove the postmark, then gets a penalty notice claiming the payment on their quarterly taxes was late, with no certified mail receipt to fight it. Pay electronically and that whole problem disappears, because the system timestamps everything and hands you a confirmation number on the spot. When you want your quarterly taxes scheduled, tracked, and reconciled so when are quarterly taxes due is never a scramble, our individual tax return team and our tax compliance service handle the whole calendar for you. Get started at the new client inquiry page.