Quarterly Estimated Taxes 2026-2027: Due Dates, Math, Penalties

Updated October 19, 2026

The Bill That Doesn’t Wait for April

Every W-2 paycheck you ever got had taxes pulled out before you saw it. Go independent and that disappears. The full check lands, and nothing’s stopping you from spending every dollar of it like it’s all yours. 1099 and Self-Employment Tax Realities already covers why that first tax bill hits harder than people expect. This one covers what that piece left for later: the IRS doesn’t wait until April to collect from you. If you’re self-employed, or pulling in real 1099 income on top of a day job, you’re generally expected to pay as you go, four times a year, whether you feel ready or not.

Short version: If you expect to owe $1,000 or more for the year after withholding, you generally need to make quarterly estimated payments. The last one for 2026 is due January 15, 2027, and the 2027 payments are due April 15, June 15, and September 15, 2027, with the final one in January 2028. You’re safe from the underpayment penalty if you pay in at least 100% of last year’s total tax, or 110% if your income was over $150,000. Miss a payment and the cost is interest on the shortfall, currently 7% a year, not a disaster.

Who Actually Has to Pay Quarterly

The trigger is simple: if you expect to owe $1,000 or more in federal tax for the year after subtracting whatever’s already being withheld, the IRS wants that money paid throughout the year, not in one lump sum the following April. That pulls in anyone running a side business, driving for a gig platform, doing contract work, or picking up steady cash jobs where nobody’s withholding on your behalf.

W-2 income doesn’t need this. Your employer’s already handling it through your paycheck withholding. It’s specifically the untaxed income, the invoices, the 1099s, the cash jobs, that creates the gap the IRS expects you to close yourself.

One group this doesn’t work the same way for: if you’ve elected S-Corp status and pay yourself a salary, most of your tax goes through payroll withholding instead. The S-Corp vs. LLC guide covers that setup, though you may still owe estimates on profit the company passes through to you beyond your salary.

The Due Dates (and Why the “Quarters” Aren’t Even)

The IRS calls these quarterly payments, but the periods behind them aren’t actual three-month quarters. Here’s the schedule for a calendar-year filer.

Finishing out 2026:

Q1 (income from Jan 1 to Mar 31): was due April 15, 2026
Q2 (income from Apr 1 to May 31, just two months): was due June 15, 2026
Q3 (income from Jun 1 to Aug 31): was due September 15, 2026
Q4 (income from Sep 1 to Dec 31, four months): due January 15, 2027

For 2027:

Q1: April 15, 2027
Q2: June 15, 2027
Q3: September 15, 2027
Q4: January 2028. January 15, 2028 falls on a Saturday and the following Monday is Martin Luther King Jr. Day, so it should land on Tuesday, January 18. Confirm the exact date on the 1040-ES once the IRS publishes it.

If a due date lands on a weekend or federal holiday, it rolls to the next business day. And the January payment isn’t required if you file your full return and pay everything you owe by the end of January. For 2026, January 31, 2027 is a Sunday, so that’s February 1, 2027. At that point you’re just paying it all at once instead of in two steps.

If you missed the September 15 payment, don’t wait for January. Send it now. The interest runs on each missed payment from its own due date, so the sooner you catch up, the less it costs.

How Much to Actually Set Aside

The number that gets repeated everywhere is “save 25 to 30% of everything you make.” It’s not a made-up figure, but it’s also not built for your specific situation, and for a lot of tradespeople it runs high. Here’s what’s actually inside it, using the same $60,000 net profit example the SE tax piece walked through.

That article works out self-employment tax on $60,000 of net profit ($8,478) and the income tax on top of it. A big reason the income tax part comes out lower than people expect is the qualified business income (QBI) deduction, which lets most sole proprietors, freelancers, and single-owner LLCs knock up to 20% of their business income off before income tax is figured. It used to be scheduled to expire after 2025. The One Big Beautiful Bill Act made it permanent.

Here’s how it works in the same $60,000 example. Taxable income before the QBI deduction lands at $39,661: net profit, minus the deductible half of SE tax, minus the $16,100 standard deduction for a single filer in 2026. Twenty percent of that is $7,932, which becomes the QBI deduction here. (At this income level, the deduction is capped at 20% of taxable income, not 20% of raw profit.) That drops taxable income to $31,729, and federal income tax to roughly $3,559, using 2026’s brackets of 10% on the first $12,400 and 12% on the rest.

Self-employment tax: $8,478
Federal income tax with the QBI deduction: about $3,559
Total federal tax: about $12,037, roughly 20% of the $60,000, not 25 to 30%

That’s federal only, and it assumes a single filer taking the standard deduction with no other income, dependents, or credits. Real numbers move with your situation. Nine states (Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming) don’t tax wage or business income, so no state estimates apply there. Everywhere else, add your state’s share on top, and check your state’s own due dates, since most states that tax income expect estimated payments too.

Where the QBI math changes. The simple 20% version above applies as long as your taxable income stays under $201,750 for a single filer or $403,500 married filing jointly in 2026. Above that, limits phase in over the next $75,000 ($150,000 for joint filers), based on the wages your business pays and the equipment it owns. For most trades, the deduction shrinks but doesn’t vanish. For certain service fields, like consulting, health, law, and accounting, it can disappear entirely at the top of that range. Starting in 2026, there’s also a $400 minimum deduction if you have at least $1,000 of business income from a business you actively work in, which helps small side gigs.

The takeaway isn’t “save less starting tomorrow.” It’s that the flat 25 to 30% rule is a safety cushion, not a precise number, and the QBI deduction is a real reason a lot of tradespeople send in more than they strictly needed to. The Quarterly Tax Estimator runs this math on your own numbers, QBI deduction included. The other reliable way to get a number without guessing is the safe harbor rule below.

The Safe Harbor Rule: Your Actual Safety Net

You avoid the underpayment penalty entirely if you pay in, across the year, the smaller of:

90% of what you’ll actually owe for the current year, or
100% of your total tax from last year (110% if last year’s adjusted gross income was over $150,000, or $75,000 if married filing separately)

That second option is the one that matters most for variable income. Take last year’s total tax from your return, divide by four, and pay that on schedule. You’re protected from the penalty even if this year turns out much bigger. You’ll still owe the difference in April, but with no penalty on top. It’s the closest thing to a guaranteed-safe number that doesn’t require predicting the future.

The catch: this only works if you filed a return last year covering a full 12 months. In your very first year of self-employment, if you had no tax liability the year before, you may not owe a penalty at all. If you did owe tax as a W-2 employee, that total is still your safe harbor number.

What Happens If You Miss a Payment or Guess Low

Nothing dramatic. The IRS calls it an underpayment penalty, but it works like interest: the federal short-term rate plus 3 percentage points, compounding daily, charged only on the amount you were short and only for as long as you were short. The rate resets every quarter. For October through December 2026, it’s 7%, unchanged from the previous quarter. The IRS announces the January through March 2027 rate in late November, and after the Federal Reserve’s September rate increase it could tick up.

In real numbers: a $1,500 shortfall left unpaid for about 90 days at 7% costs around $26. It adds up if it drags on for a full year, but a single missed or underpaid quarter, caught and corrected at the next one, is a manageable cost, not a crisis. Paying something late is always better than paying nothing, since the charge is figured on the actual shortfall.

Two things worth knowing. This charge isn’t tax-deductible, so it costs you the full amount. And it’s separate from the much bigger failure-to-pay and failure-to-file penalties that kick in if you don’t file or pay by the April deadline. Those are the ones to really avoid.

How to Actually Send the Payment

Form 1040-ES has the worksheet for figuring your number. How you pay has changed recently, though:

IRS Direct Pay: free, no account or enrollment needed, pays straight from your bank account. You can schedule a payment ahead of the due date.
IRS Online Account: free, and it lets you make payments, schedule future ones, and see every payment you’ve made, which takes care of record-keeping for you.
EFTPS: the old go-to for scheduling a whole year of payments. As of October 2025, individuals can no longer sign up for new EFTPS enrollments. If you’re already enrolled, it still works. If you’re not, use Direct Pay or your IRS Online Account instead.
Debit or credit card: available through IRS-approved processors, but they charge a fee.
Paper check: still accepted for now, but the federal government is phasing out paper payments, and the IRS is pushing hard toward electronic. Don’t build a new habit around mailing checks.

Whichever way you pay, keep your own record of every payment and when you made it. You’ll need the total when you file your return the following spring.

Building a System That Works With Seasonal, Irregular Income

Trade work rarely lands evenly across four periods. A lot of outdoor trades run hard through summer and slow down in winter, and mobile mechanic or handyman work can swing hard month to month depending on who’s calling. Two things help:

First, treat the safe harbor number, last year’s total tax divided by four, as your floor. Set that much aside automatically, off the top of every payment as it comes in, into a separate account you don’t touch. It’s the same idea as a sinking fund, just for a bill you know is coming. A dedicated tax account, covered in business banking and bookkeeping, keeps that money from quietly turning into this month’s groceries. Budgeting on irregular income walks through the rest of the system.

Second, if your income is genuinely lumpy by quarter rather than steady, the IRS doesn’t actually require even payments. The annualized income installment method (Schedule AI on Form 2210) figures what you owed based on the income you actually earned in each period, instead of four equal installments. That matters if you had a slow first quarter and don’t want to send in a full even-split payment while cash is tight. It does take more paperwork at tax time, since you have to show your income for each period. Most tax software handles it.

If You Also Have a W-2 Job

If you’re working a day job and running side income on top of it, quarterly payments aren’t your only option. You can increase the withholding on your W-4 at the day job instead. The IRS treats withholding as paid evenly across the whole year no matter when it’s actually taken out of your paycheck. That’s a real advantage over estimated payments, where being short in April still costs you even if you make it up in December. A side hustler with a steady W-2 job can sometimes cover the whole extra tax bill by raising withholding a few months before year-end and skip quarterly payments altogether.

If you work a lot of overtime at that day job, factor in the new overtime deduction. From 2025 through 2028, you can deduct the extra “half” portion of time-and-a-half pay, up to $12,500 a year ($25,000 married filing jointly), with the deduction shrinking at incomes above $150,000 ($300,000 joint). Your paycheck withholding probably doesn’t account for it, so a heavy-overtime year can mean you need less extra withholding or fewer estimates than you’d think.

When a Big Purchase Changes What You Owe

Buying a work van, a major tool, or other business equipment mid-year can meaningfully lower what you owe for the year, especially with Section 179, which lets you deduct the full cost in the year you put it in service rather than spreading it out. It has to be delivered and ready to use by December 31 to count for 2026. Business depreciation covers how that works, and the equipment financing guide covers how the way you finance a purchase affects whether you can claim it at all.

The same goes for other deductions that build up during the year, like the mileage deduction, the home office deduction, and the self-employed health insurance deduction, which lowers your income tax but not your SE tax. If you’re paying based on this year’s numbers rather than the safe harbor, rerun your estimate after a big purchase or a change like that, and lower your next payment to match. If you’re using the annualized method, that’s how a mid-year purchase shows up as a smaller payment right away instead of a refund the following spring.

Where to Start

If you’ve never made an estimated payment, start simple. Find last year’s total tax on your return, divide it by four, and set up the January 15 payment through Direct Pay or your IRS Online Account. Then set aside a fixed share of every check going forward, and fine-tune the percentage once you’ve run your real numbers through the estimator.

Related Guides

1099 and self-employment tax realities, the full $60,000 walkthrough
Quarterly Tax Estimator, to run your own numbers
Budgeting on irregular income, for setting money aside when pay is lumpy
Equipment financing, and how it decides your Section 179 write-off

This article is for general informational purposes only and isn’t financial, legal, insurance, or tax advice. For guidance specific to your situation, talk to a licensed professional.

Frequently Asked Questions

The final 2026 payment is due January 15, 2027. The 2027 payments are due April 15, June 15, and September 15, 2027, with the last one in January 2028. You can skip the January 2027 payment if you file your full 2026 return and pay everything you owe by February 1, 2027.

If your side income still leaves you expecting to owe $1,000 or more for the year after your day job withholding, yes. Many side-hustlers find it simpler to raise W-4 withholding at their main job instead, since withholding counts as paid evenly across the year no matter when it is actually taken out.

You owe an underpayment penalty that works like interest, currently 7% a year compounded daily, charged on the shortfall from the missed due date until you pay. It is not deductible, but for a single missed quarter it is usually a small cost. Pay as soon as you can, since the charge keeps running until you do.

The general trigger is expecting to owe $1,000 or more for the year after subtracting withholding. If you had no tax liability last year and were a US citizen or resident for the full year, you generally will not owe an underpayment penalty this year, but a jump in self-employment income can change your situation quickly.

Yes. The annualized income installment method, Schedule AI on Form 2210, figures what you owed based on what you actually earned in each period instead of four equal payments. It fits trades that run hot in summer and slow in winter, though it takes more paperwork at tax time.

For most sole proprietors, yes. It lowers the income tax part of your bill by up to 20% of qualified business income. It does not touch the 15.3% self-employment tax. Above $201,750 of taxable income for a single filer, or $403,500 for joint filers, in 2026, limits phase in, and for certain service fields it can disappear entirely.

IRS Direct Pay is free, needs no enrollment, and pays straight from your bank account. Your IRS Online Account also lets you make and schedule payments and shows your full payment history. Card payments work too, but processors charge a fee.

Not as a new individual user. The IRS stopped accepting new EFTPS enrollments from individuals in October 2025. If you are already enrolled, it still works. Otherwise, use IRS Direct Pay or your IRS Online Account, both of which let you schedule payments in advance.

Sources

📖 More from Wrench & Wallet

Money & Finance:
How to Build a Budget · Credit Cards & Debt · How to Start Investing · Best Side Hustles

Want to earn free crypto? Visit our sister site → Free Crypto List

← Back to Home

Quarterly Estimated Taxes: When to Pay, How Much, and What Late Costs