Quarterly Estimated Taxes: How Much to Set Aside and How to Avoid the Penalty

Setting aside somewhere around a quarter to a third of what you earn is a reasonable habit. But there’s a rule that removes the guesswork entirely: pay a set percentage of last year’s total tax, spread across the year’s four payment dates, and it doesn’t matter how much you actually earn this year. You cannot owe a penalty.

• A rough set-aside percentage is a cash-flow habit. The safe harbor is what actually removes the risk.
• There are four payment dates, and they don’t split the year evenly. One stretch is two months long. Another is four.
• The penalty is interest, charged separately for each period. Paying it all at the end doesn’t undo an earlier shortfall.
• If you also have a job with withholding, your W-4 can often fix an entire year’s shortfall in a way no estimated payment can.

Already filed a return last year? Jump straight to the safe harbor checker — it takes one number from that return and tells you the exact amount that makes a penalty impossible.

Here are the four 2026 payment dates. They aren’t equal quarters. One period runs two months. Another runs four. That’s exactly why “I’ll catch up next quarter” is harder than it sounds.

• April 15, 2026
  Covers Jan 1–Mar 31
  3 months
• June 15, 2026
  Covers Apr 1–May 31
  2 months
• September 15, 2026
  Covers Jun 1–Aug 31
  3 months
• January 15, 2027
  Covers Sep 1–Dec 31
  4 months

Here’s how much to set aside, how to be certain about the penalty, and what to do if you’re already behind.

How Much to Set Aside: The Safe Harbor Checker

Do You Actually Have to Do This?

Generally, yes, if you expect to owe $1,000 or more for 2026 after subtracting withholding and refundable credits, and your withholding and credits will be less than the smaller of 90% of this year’s tax or 100% of last year’s tax (110% for some higher earners — more on that below), you’re expected to make estimated payments.

There’s a genuine first-year exception. You don’t have to pay estimated tax this year if all three are true: you had no tax liability at all last year, you were a U.S. citizen or resident alien for the whole year, and last year’s return covered a full 12 months. Having no tax liability means your total tax was zero, or you weren’t required to file at all.

Income without withholding attached usually means self-employment, gig, and contract work, interest and dividends, capital gains, rental income, and retirement distributions where you haven’t elected withholding. If you own an LLC and take draws, you generally pay through your own personal return; the LLC itself doesn’t make the payment for you.

See the IRS’s Form 1040-ES for the full worksheet behind this test, and Internal Revenue Code section 6654 for the underlying rule and its exceptions.

What Self-Employment Tax Actually Is

The self-employment tax rate for 2026 is 15.3%. It’s two things stacked together: 12.4% for Social Security and 2.9% for Medicare — the same two pieces an employer and employee would normally split.

You don’t pay that rate on your full net profit. You pay it on 92.35% of your net earnings from self-employment. That built-in reduction exists because the tax code lets you deduct half of your self-employment tax, and 92.35% backs that adjustment into the base.

The Social Security piece has a ceiling: for 2026, it applies to the first $184,500 of combined wages and net self-employment earnings. If you also have a W-2 job, your wages use up that ceiling first. The Medicare piece has no ceiling at all — it applies to every dollar of net self-employment earnings, no matter how much you make.

Above certain income levels, an Additional Medicare Tax of 0.9% applies on top of the 2.9%: over $200,000 for single filers, $250,000 for married filing jointly, or $125,000 for married filing separately. These thresholds don’t move with inflation.

You get one real break: half of your total self-employment tax is deductible above the line when figuring your adjusted gross income. It doesn’t reduce the self-employment tax itself, but it does reduce your income tax.

All of this is figured on Schedule SE, and the $184,500 wage base above comes from the Social Security Administration’s 2026 announcement, since it’s adjusted every year.

One honest paragraph on entity elections, since this comes up a lot: electing to have your business taxed as an S corporation can change how much of your income is exposed to self-employment tax, but it isn’t free. It comes with running payroll, a “reasonable compensation” requirement the IRS actually enforces, extra filings, and real ongoing cost. Whether it’s worth it for you is a conversation for a tax professional, not a rule of thumb — this article doesn’t cover the how-to or a threshold where it “makes sense.”

How Much to Set Aside From Each Payment

As a starting habit, many self-employed people set aside somewhere around a quarter to a third of each payment. That range comes from stacking self-employment tax (which runs about 14%–15% of net profit once you apply the 92.35% factor) on top of income tax at a moderate marginal rate. It’s a reasonable default, not a personalized number.

It’s only an approximation for a few reasons. Your marginal tax rate — the rate on your next dollar — isn’t the same as your effective rate, the average rate across everything you earn; see How Tax Brackets Work: Marginal vs. Effective Tax Rate for why that gap matters here. And your taxable base is smaller than your gross revenue once real deductions come off; see Tax Deductions You’re Probably Missing for what actually reduces it.

The Safe Harbor: How to Make a Penalty Impossible

Here’s the rule this whole page is built around. You avoid the underpayment penalty entirely if, through withholding and timely estimated payments, you pay at least the smaller of two amounts: 90% of this year’s actual tax, or 100% of last year’s total tax.

If your adjusted gross income last year was more than $150,000 — or more than $75,000 if you’re married filing separately this year — that second number rises to 110% of last year’s tax instead of 100%. This is based on last year’s AGI, not what you expect to earn this year.

The prior-year route is the one most people use, because it’s a known number straight off a filed return — no estimating required. The current-year route (90% of this year’s actual tax) is usually the better choice only if your income has genuinely fallen from last year, since it can produce a smaller required payment. Either way, the prior-year route only works if that prior return covered a full 12 months.

The one condition that trips people up: the payments have to be timely and reasonably spread across the year’s four dates. Paying the full amount in a lump sum late in the year does not satisfy the safe harbor for the earlier periods — see the penalty section below for why. See IRS Publication 505 for the full mechanics behind this rule.

• Covered — your withholding and timely estimated payments add up to at least 100% (or 110%, if it applies to you) of last year’s total tax, spread across the year.
• Covered — your withholding and timely estimated payments add up to at least 90% of this year’s actual tax.
• Covered — your total balance due after withholding and credits comes in under $1,000.

• Exposed — you’re relying on a big payment at the end of the year to make up for earlier gaps.
• Exposed — you assumed 100% of last year’s tax applied, but your prior-year AGI actually put you in the 110% bracket.
• Exposed — you’re estimating this year’s tax instead of using last year’s known number, and the estimate comes in low.

The Four Dates, and How to Pay

The four 2026 due dates fall on weekdays, so none of them shift this year. If a due date ever lands on a weekend or federal holiday, it simply moves to the next business day.

There’s a lesser-known way to skip that last one entirely: if you file your full 2026 return and pay everything you owe by February 1, 2027 (the deadline shifted from January 31, which falls on a Sunday), you don’t have to make the January 15, 2027 payment at all.

Every payment channel here is the IRS’s own. You can pay directly from a bank account at no cost, through your IRS online account (which also shows what’s actually been credited so far — the reliable way to check where you stand), through the Electronic Federal Tax Payment System, or by debit card, credit card, or digital wallet through an IRS-approved processor, which charges a fee. A mailed voucher and check still works too. If you mail a payment, the date of the postmark counts as the payment date.

The correct mailing address for your state is printed in the current year’s Form 1040-ES instructions — it isn’t the same address as your tax return, and it changes, so it isn’t reproduced here. You can also apply an overpayment from last year’s return straight to this year’s first estimated payment. See the IRS’s payments page for all current options.

The Penalty: What It Is and How It’s Calculated

Here’s the mechanic that surprises almost everyone: each of the four periods gets its own underpayment calculation. If you fell short in April but overpaid in September, the April shortfall still accrued interest for every day it went unpaid — even if you end up getting a refund at filing. That’s why “I’ll just pay it all in January” doesn’t work the way it sounds like it should.

The interest rate is set every quarter by the IRS: the federal short-term rate plus three percentage points, for individuals. It’s currently 7% for the third quarter of 2026 (July 1 through September 30, 2026), and it resets again on October 1. Check the IRS’s quarterly interest rates page before doing your own math, since it moves.

The penalty is figured on Form 2210. In most cases you don’t have to compute it yourself — the IRS will calculate any penalty for you and send a bill after you file.

The IRS will waive all or part of the penalty in a few defined situations: you retired after age 62 or became disabled in the current or prior tax year and the underpayment was due to reasonable cause, not willful neglect; or the underpayment was caused by a casualty, disaster, or other unusual circumstance where imposing the penalty would be inequitable. If you’re in a federally declared disaster area, relief is often applied automatically.

The most important thing to hold onto: a missed installment is an interest charge, not a fine. Paying it as soon as you can stops the meter running. It isn’t a catastrophe, and it isn’t a reason to panic.

You Missed One. Now What?

Pay what you can, now. Interest keeps accruing on the shortfall every day it’s unpaid, so the single best move is closing the gap immediately rather than waiting for the next date on the calendar.

“I’ll catch up in January” doesn’t undo an earlier period, because — as covered above — each period is judged on its own. A payment you make today is applied first to your oldest unpaid installment, not to whichever one you had in mind, so paying now genuinely helps the earliest gap first.

In order of what actually helps: pay what you can toward the oldest shortfall today; get current on the payment dates still ahead of you; and if you also have wage income, consider the withholding fix described next, since it can retroactively cover earlier periods in a way a new estimated payment cannot. If you’re genuinely unable to pay what’s owed, see the IRS Hardship Program Guide for what comes next.

If You Also Have a Job: The Withholding Fix

Here’s the rule that makes this possible: by default, federal income tax withheld from your paycheck is treated as if it were paid in four equal installments across the whole year — regardless of which actual paycheck it came out of. A dollar withheld in November counts, for penalty purposes, as if a quarter of it landed on each of the four payment dates, including the ones already past.

The consequence is genuinely useful. If you’re behind on estimated payments because your self-employment income came in later than expected, increasing your paycheck withholding late in the year can retroactively cover shortfalls from April, June, and September — something a new estimated payment sent today simply cannot do, since estimated payments only count from the date you actually send them.

There is a way to instead treat withholding as paid on the actual dates it came out of your paycheck, but it requires checking a specific box on Form 2210 and rarely helps, since the default treatment is exactly what creates this fix. This rule applies to wage withholding and, in the right circumstances, to withholding elected on other payments too, including retirement distributions.

Adjusting your withholding takes a new form filed with your employer, plus the IRS’s own withholding estimator to figure the right extra amount. See How to Fill Out a W-4 Form (2026 Step-by-Step) for exactly how to fill it out — that isn’t covered here.

When Your Income Arrives Unevenly

If your income is genuinely lumpy — a seasonal business, or one big payment late in the year — the annualized income installment method lets you calculate each required payment based on what you actually earned by that point in the year, rather than a flat quarter of your annual total.

It requires completing Schedule AI, attached to Form 2210, using cumulative periods (January through March, January through May, January through August, and the full year). It’s more paperwork than the standard method, and once you use it for one payment date you have to use it for all four.

Honestly: it’s worth the effort mainly when the unevenness is substantial — a seasonal business with almost no income in the first half of the year, or a single large transaction that lands in the fourth quarter. If your income is only mildly uneven, the standard method and the safe harbor above will usually serve you better for less work.

Retirees Have to Do This Too (and Have a Shortcut)

Retirement distributions don’t come with automatic withholding the way a paycheck does — nothing is withheld unless you elect it. That means a first year of distributions can quietly create the exact estimated-tax situation this whole page is about.

Here’s the shortcut almost nobody mentions: electing withholding directly on your distribution is usually simpler than making quarterly estimated payments, and it inherits the same favorable timing treatment described above — it’s treated as paid evenly across the year no matter when it’s actually withheld. Social Security benefits can have voluntary withholding elected too, through their own form.

For the mechanics of which account to draw from and how that interacts with your taxable income, see Which Retirement Account to Withdraw From First — sequencing itself isn’t covered here.

Your State Probably Wants Some Too

Many states run their own estimated-payment system entirely separate from the federal one, with their own thresholds, their own safe-harbor percentages, and their own due dates that don’t necessarily line up with the four federal dates above. Some states have no individual income tax at all, in which case none of this applies to you at the state level.

This page deliberately doesn’t list state figures or deadlines, because they vary substantially and change often — a table here would be out of date within a year. Check your own state’s revenue department directly for what applies to you.

Building a System So This Stops Being Stressful

Open a separate account used for nothing else. The moment a payment lands, move your set-aside amount there and leave it alone.

Automate the transfer if your bank allows it, so the decision happens once instead of every time money comes in. Keeping the money somewhere that earns a bit of interest is fine, as long as it stays immediately available — you’ll need all of it, on time.

Put a calendar reminder a week before each of the four dates above, not on the date itself, so you have time to actually send the payment. And if the money’s already been spent by the time a deadline arrives, sending something is always better than sending nothing — the interest is running on whatever’s still short, not on the whole amount.

Frequently Asked Questions

What percentage should I set aside for taxes if I’m self-employed?

There’s no single correct percentage. A quarter to a third of each payment is a reasonable starting habit, but the only way to be certain about the penalty is the safe harbor described above, not a fixed percentage.

Do I have to pay quarterly taxes in my first year?

Often, no. If you had no tax liability at all last year, were a U.S. citizen or resident alien the whole year, and that prior year covered a full 12 months, you’re exempt from the penalty this year.

Do I owe estimated taxes if I also have a W-2 job?

Only if your job’s withholding, plus any estimated payments, doesn’t reach the safe harbor amount described above. Increasing your W-4 withholding is often the simpler fix — see the withholding fix section.

What is the self-employment tax rate?

15.3% for 2026, made up of 12.4% for Social Security and 2.9% for Medicare, applied to 92.35% of your net self-employment earnings.

What is the safe harbor rule?

It’s the provision that removes the guesswork: pay at least the smaller of 90% of this year’s actual tax or 100% (110% for some higher earners) of last year’s total tax, spread across the year, and you cannot owe a penalty regardless of how this year turns out.

Does the safe harbor change if I earn a lot?

Yes. If your adjusted gross income last year was over $150,000 (or $75,000 if you’re married filing separately this year), the prior-year percentage rises from 100% to 110%.

Can I just pay everything at the end of the year?

No. The penalty is calculated separately for each of the four periods, so a lump sum late in the year doesn’t retroactively cover earlier shortfalls, even if it covers your full annual liability.

When are the quarterly payment dates?

For 2026: April 15, June 15, September 15, 2026, and January 15, 2027.

Why aren’t the quarters equal?

Because the periods they cover aren’t equal. One stretch is two months long, another is four, even though there are still exactly four payment dates a year.

How do I actually pay?

Directly through the IRS: bank debit, your IRS online account, the Electronic Federal Tax Payment System, card or digital wallet through an approved processor (a fee applies), or a mailed voucher and check.

Is there a penalty for missing one payment?

Generally, yes, but it’s interest on the shortfall, not a flat fine, and it stops growing the moment you pay what’s missing.

How is the underpayment penalty calculated?

As interest on each period’s specific shortfall, from that period’s due date until it’s paid or until the return’s due date, at the IRS’s quarterly interest rate.

What’s the underpayment penalty rate?

It’s the federal short-term rate plus three percentage points for individuals, reset every quarter. It’s 7% for the third quarter of 2026 (July through September).

Do I owe a penalty if I’m getting a refund?

You still can, if an earlier period was underpaid, even though your total for the year comes out even or ahead. This tool and this page don’t determine that for you — Form 2210 does.

Can I get the penalty waived?

Sometimes. Waivers exist for retirement after age 62 or disability with reasonable cause, and for a casualty, disaster, or other unusual circumstance where the penalty would be inequitable.

Can I fix a missed payment with my paycheck withholding?

Often, yes, if you also have a job. Withholding is treated as paid evenly across the year by default, so increasing it late in the year can retroactively cover an earlier shortfall.

Do retirees have to pay estimated taxes?

Often, yes, unless withholding is elected on the distribution itself — which is usually simpler than making quarterly payments and gets the same favorable timing treatment.

Does my state require estimated payments too?

Many states do, on their own schedule with their own rules, separate from the federal system described here. Check your state’s revenue department directly.

This article is for educational and informational purposes only and is not tax advice, and AdvoraHQ is not a tax preparer or a licensed tax professional. Tax rates, income thresholds, wage bases, safe-harbor percentages, filing deadlines, and the interest rate applied to underpayments are set by federal law and by the IRS, are stated here for the tax year shown, and change — some annually. State estimated tax requirements are separate, vary substantially, and are not covered here; check your state’s revenue department. The calculators on this page use only the figures you enter, store nothing, send nothing anywhere, apply simplified assumptions, and do not determine your tax liability, calculate any penalty, or constitute a filing. Penalties and exceptions are figured on IRS forms and depend on circumstances these tools cannot see. Verify all figures against the current year’s IRS instructions and consult a qualified tax professional about your own situation.

Last updated: August 31, 2026