When Are Quarterly Estimated Taxes Due in 2025?

For tax year 2025 the four estimated payments were due April 15, 2025, then June 16, 2025, then September 15, 2025, with the last one due January 15, 2026. April 15 fell on a Tuesday. June 16 was a Monday, moved because June 15, 2025 landed on a Sunday. September 15 was a Monday and needed no adjustment. Anyone still searching for the quarterly tax due dates 2025 schedule is looking at a closed calendar, and the useful work now is checking whether the payments actually made were large enough.

One feature of the fourth payment is worth knowing even in hindsight. A taxpayer could skip the January 15, 2026 installment entirely if the 2025 return was filed and the balance paid in full by February 2, 2026. That option rewarded anyone whose records were already in order in January. Filing that early requires every information return in hand, and forms in the 1099 series for the prior year are not always issued by the end of January. Taxpayers waiting on a late brokerage statement rarely managed it, which is why the January payment usually gets made in practice.

Estimated payments are the mechanism for income that arrives without withholding. Self-employment earnings reported on Schedule C, distributive shares from a partnership or an S corporation, rental income, portfolio income and retirement distributions all sit in that category. The IRS overview of estimated taxes sets out who is expected to pay, and Form 1040-ES carries the worksheet that computes the amount.

Work a 2025 example all the way through. A freelance designer had 90,000 dollars of net self-employment income and no withholding anywhere. Her total 2025 tax, including the self-employment tax computed on Schedule SE, came to 20,000 dollars. Divided evenly that was 5,000 dollars per installment. She paid 5,000 dollars in April and 5,000 dollars in June, then skipped September when a client paid late. That one skipped installment is what the computation looks at, not the year-end total.

Extend that example one step. If the designer paid the September amount in November instead, the shortfall existed from September 15, 2025 until the day the money posted, and the computation charges her for exactly that window. Partial credit is real here. A late payment cuts the exposure from the moment it lands, which is a reason to pay as soon as the cash exists rather than waiting for the next scheduled date to come around.

The mistake that costs the most is treating the four payments as a single annual obligation. The addition to tax under section 6654 is computed installment by installment, so paying 20,000 dollars in December does not repair three missed dates earlier in the year. Money paid late is late from the date it was due. Our bookkeeping team sets a quarterly reminder tied to actual cash flow for clients who learned that the hard way during 2025.

Records make the reconstruction possible. If you cannot recall what you paid during 2025, the get transcript service shows the payments posted to your account by date, which beats hunting through bank statements. Bring that transcript to any conversation about the 2025 return before assuming a payment was missed. The 2026 dates are already set and none of them shift, so clients who want the remaining installments sized against a real forecast bring that work to our tax strategy consulting team well before the next deadline.

Because June 15, 2025 fell on a Sunday. The rule is general. When a due date lands on a Saturday, on a Sunday or on a legal holiday, the deadline moves to the next business day. June 15, 2025 was a Sunday, so the second installment for tax year 2025 became due Monday, June 16, 2025. A payment made on June 16 was timely. A payment made on June 17 was one day late and started the interest running.

The other three 2025 dates needed no help. April 15, 2025 was a Tuesday. September 15, 2025 was a Monday. January 15, 2026 was a Thursday. Only the June installment shifted, which is precisely why taxpayers who set a recurring reminder years ago missed it. A reminder that simply says the fifteenth of the month is right three times out of four and wrong in a way that costs money the fourth time. Anchor the reminder to the published schedule each January instead, because the dates are set well in advance and confirming them takes two minutes.

For 2026 nothing shifts at all. The installments are due April 15, 2026, then June 15, 2026, then September 15, 2026, with the fourth due January 15, 2027. Every one of those dates falls on a weekday, so the plain calendar date is the deadline. That makes 2026 an easier year to schedule and, oddly, a harder year to stay alert in, because the exception that trained people to check the calendar does not appear anywhere in it.

The same weekend rule has a cousin that catches people on the filing side. District of Columbia Emancipation Day is Thursday April 16, 2026, which falls the day after the individual filing deadline, so it does not extend anything in 2026. In some years that holiday does push the April date outward. This is not one of those years, and April 15, 2026 stands on its own as the deadline for a calendar-year individual return.

The shift is small and the cost of ignoring it is not. Take a consultant who owed 4,500 dollars for the second 2025 installment. Paying on June 16, 2025 was timely and cost nothing extra. Paying on July 16, 2025 instead ran 4,500 dollars through a 7 percent annual rate for roughly 30 days, which works out to about 26 dollars before daily compounding. That is small on one installment. It stops being small when the same pattern repeats across four quarters on a larger balance.

The mistake here is assuming a mailed check is timely when it arrives. Electronic payment removes the question. Direct Pay posts from a bank account with a dated confirmation, and the broader IRS payments page lists the other channels. Keep the confirmation number. In a dispute over timing, a dated electronic receipt settles in minutes what a bank statement takes weeks to establish.

Withholding is the other lever and it is the one people forget. Tax withheld from wages or from a pension is treated as paid evenly across the year regardless of when it was actually withheld, which is why a mid-year change on Form W-4 can repair an installment shortfall that a December estimated payment cannot. The tax withholding estimator sizes that change with real numbers. Clients with uneven income get more value from a quarterly check-in than from a fixed figure, which is the model our tax strategy consulting team uses, while our individual tax returns group reconciles paid against owed at filing.

The underpayment interest rate for a non-corporate taxpayer under section 6621 was 7 percent in all four quarters of 2025, compounded daily. That single rate covers the whole 2025 cycle, so anyone reconstructing what a missed payment cost against the quarterly tax due dates 2025 schedule works from one number rather than from four different ones. Rates are set quarterly, so a year carrying one rate throughout is a convenience, and 2025 happened to be that kind of year.

For 2026 the rate has moved. It was 7 percent in the first quarter, 6 percent in the second quarter and 7 percent again in the third quarter. The fourth quarter 2026 rate has not been announced. We will not print a number for it, and neither should anyone else, because the rate comes from a published quarterly determination and until that determination exists there is nothing to cite. Those determinations are published ahead of each quarter, so the figure for a period is knowable before the period begins.

The charge is technically an addition to tax under section 6654 rather than a penalty in the ordinary sense, and the grounds for relief are narrower than the reasonable cause relief available for some other penalties. It runs from each installment due date until the earlier of the date the amount is paid or the due date of the return. The rate applies to each installment period separately, which is why the arithmetic gets tedious quickly. Daily compounding also means the posted annual rate slightly understates the true cost over a long stretch.

One more distinction is worth drawing. The addition to tax for underpaying installments is not the same thing as the late payment penalty that runs on an unpaid balance after the return due date. A taxpayer who underpaid installments during the year and then filed and paid on time in April faces the first charge and not the second one. Reading a notice with that split in mind makes the totals add up far faster than reading it line by line.

Price a real shortfall. A taxpayer underpaid the June 16, 2025 installment by 6,000 dollars and did not make it up until April 15, 2026, roughly 303 days later. At 7 percent, 6,000 dollars carried for 303 days is about 349 dollars before daily compounding, which adds a few dollars more. Do the same on three installments in one year and the addition to tax grows into a number that gets a client’s full attention, without any single decision looking dramatic at the time.

The mistake is assuming the interest rate is the real cost. Usually it is not. The larger cost is the cash flow surprise in April, when a taxpayer who skipped installments finds a balance due, an addition to tax and a first 2026 installment landing in the same week. Pull the numbers in February rather than in April, while there is still time to arrange the cash. Build that reconstruction from the account record rather than from memory.

Check the figure against the notice you receive rather than against a summary page. The IRS explains how to read those documents in its guidance on understanding your notice or letter, and the computation itself appears on Form 2210. Where a balance cannot be paid at once, the online payment agreement application is the route to an installment agreement. Our individual tax returns group prices these amounts at filing, and our bookkeeping team keeps the payment record that makes the computation quick.

File and pay first. Interest runs on an unpaid balance whatever else is happening, so the fastest way to stop the meter is to get the 2025 return filed and the balance paid. If you already filed and later found the shortfall, that is a different repair and may point to Form 1040-X. If you have not filed at all, file now rather than waiting for a perfect set of records, because the arithmetic on the quarterly tax due dates 2025 cycle only gets worse with time.

Then look at whether the addition to tax can be waived. Form 2210 is where the computation and the waiver request both live. The IRS will consider a waiver where the underpayment was caused by casualty, by disaster or by another unusual circumstance and imposing the addition would be inequitable. Federally declared disaster relief is applied automatically by county, so a taxpayer in a covered county often does not have to ask for it. Attach any explanation to the return rather than mailing it separately, since a loose statement rarely finds the right file.

There is a second ground with a narrower shape. A taxpayer who retired after reaching age 62, or who became disabled, during 2024 or 2025, and whose underpayment was due to reasonable cause rather than willful neglect, can request a waiver on that basis. Both grounds require a statement filed with the form. Neither is automatic outside the disaster county lists, and a bare assertion with no supporting facts rarely succeeds on review.

Do not let a waiver request hold up the filing itself. The request travels with the return, so the return still has to go out on time. If the facts supporting a waiver are still being gathered in April, file the return anyway and pay what you can against the balance. Raise the waiver on that return rather than keeping the whole package back for one attachment that is not ready.

Run the numbers on a common fact pattern. A contractor owed 20,000 dollars of 2025 tax and paid only 12,000 dollars across the four installments, leaving 8,000 dollars short. Filing by April 15, 2026 and paying the 8,000 dollars stops further interest on that balance. The addition to tax still applies to the installments that were short during 2025, and Form 2210 is where the amount is computed and where any waiver gets requested.

One more option deserves a look before you accept the default computation. The annualized income installment method on Form 2210 lets a taxpayer whose income arrived unevenly show that the required installment for an early quarter was smaller than the flat one-fourth assumption. A designer who earned almost nothing until September 2025 may owe far less than the standard computation suggests. Publication 505 walks through that method in detail. It takes real records and it pays off most for seasonal work.

The mistake we see is skipping the return because the money is not there. Filing and paying are separate acts. File on time, then arrange the balance through the online payment agreement application or with Form 9465. Failure to file carries a far heavier consequence of its own. Once the shortfall is settled, raise withholding on Form W-4 if there is wage income in the household. Our individual tax returns group handles the 2025 cleanup, and our tax strategy consulting team sizes the 2026 installments so the same conversation does not repeat next April.

The 2026 installments are due April 15, 2026, then June 15, 2026, then September 15, 2026, with the fourth due January 15, 2027. None of those dates shift. That is the plainest difference from the quarterly tax due dates 2025 calendar, where the second installment moved to June 16 because June 15, 2025 was a Sunday. In 2026 every deadline is exactly the date printed on the form, with no weekend adjustment anywhere in the cycle.

The safe harbor is what turns a guess into a plan. Pay the smaller of 90 percent of the current year’s tax or 100 percent of the prior year’s tax and the addition to tax under section 6654 does not apply. Substitute 110 percent for that 100 percent figure if prior-year adjusted gross income exceeded 150,000 dollars, or 75,000 dollars for a married taxpayer filing separately. The comparison runs against the prior year’s actual tax as shown on the filed return, not against what happened to be paid during that year.

There is a carve-out worth knowing. The 110 percent requirement does not apply where two-thirds of gross income comes from farming or from fishing. Those taxpayers have their own installment timing, and applying the general rule to a farm return is a recurring error in software set up for a different kind of client. If your income mix shifted during the year, test the two-thirds question against the actual return rather than against last year’s assumption, and raise it with your preparer rather than trusting that the software caught it.

The 2025 figures also drive the 110 percent test. A taxpayer whose 2025 adjusted gross income crossed 150,000 dollars for the first time moves from the 100 percent measure to the 110 percent measure for 2026, and that change is easy to miss because nothing about the payment schedule itself looks any different. Check the prior-year number on the filed 2025 return before setting the size of the first 2026 installment.

Size a real safe harbor. A consultant’s 2025 total tax was 24,000 dollars and her 2025 adjusted gross income was 180,000 dollars, which sits above the 150,000 dollar line, so her 2026 safe harbor is 110 percent of 24,000 dollars, or 26,400 dollars. Four equal installments of 6,600 dollars paid on the four 2026 dates take the addition to tax off the table for 2026, no matter how large her 2026 income eventually turns out to be.

The mistake is chasing the 90 percent test on a year that is still moving. Prior-year tax is a known number. Current-year tax is an estimate that changes with every new client and every asset sale. Anchoring to the prior-year figure costs a little cash flow and buys certainty, and for most people that trade is worth making. Certainty has a price and it is usually a small one. A safe harbor payment is not a prediction, it is a floor.

Two tools do the arithmetic for you. Form 1040-ES carries the worksheet, and Publication 505 explains the rules behind it, including the annualized method for uneven income. Where there is wage income in the household, the tax withholding estimator is often the faster fix, because withholding counts as paid evenly across the year. Taxpayers who want the remaining 2026 installments sized against a real forecast can request a consultation. Our tax strategy consulting team builds the schedule, and our bookkeeping team keeps the payment record so the following April holds no surprises.