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By Jason Erskine · Updated May 31, 2026 · Figures verified 2026-05-31

Quarterly Estimated Taxes — A 2026 Guide for the Self-Employed

Short version: if you expect to owe at least $1,000 in federal tax after withholding, the IRS expects you to pre-pay it in four chunks during the year. For tax year 2026, the four due dates are April 15, June 15, September 15, and January 15, 2027 (the last one falls in 2027). Miss them and the IRS can charge an underpayment penalty even if you pay your full bill by April.

What “estimated taxes” actually are

The US tax system is “pay-as-you-go.” For employees that happens invisibly — every paycheck has federal tax withheld and sent to the IRS in real time. Self-employed people have no employer withholding, so the IRS asks them to make the equivalent payments themselves, four times a year, using Form 1040-ES.

Estimated payments cover everything you owe federally on self-employment income:

• Self-employment (SE) tax — Social Security and Medicare on net earnings, which would have been split with your employer if you had one.
• Federal income tax — your normal income tax across the brackets, on top of SE tax.
• Additional Medicare tax — 0.9% above the filing-status threshold, if you earn that much.

If you also have W-2 income or another source with withholding, that withholding counts toward what you owe — you only need to estimate the gap.

Who has to pay quarterly

Per the IRS, you generally must make estimated payments if both of these are true for 2026:

1. You expect to owe at least $1,000 in federal tax after subtracting any withholding and refundable credits, and
2. You expect your withholding and refundable credits to be less than the smaller of:
   • 90% of the tax shown on your 2026 return, or
   • 100% of the tax shown on your 2025 return (or 110% if your 2025 AGI was over $150,000).

That second condition is the “safe harbor” — it’s how you avoid the penalty even if your actual final tax turns out higher than what you paid in. More on that below.

A quick rule of thumb: if you’re freelancing full-time and expect any meaningful profit, assume yes, you owe quarterly. If you have a side hustle on top of a W-2 job, run the numbers — sometimes bumping W-2 withholding is enough to cover it.

The 2026 estimated tax due dates

The IRS divides the year into four uneven “payment periods.” Each period has its own deadline, falling about two weeks after the period ends:

A few subtleties that catch first-year freelancers:

• The quarters are not three months each. Q1 covers Jan–Mar (three months), Q2 covers Apr–May (two months), Q3 covers Jun–Aug (three months), Q4 covers Sep–Dec (four months). Despite the uneven periods, most people just pay 1/4 of their annual estimate each time — that’s fine.
• Q4 is due in January of the following year. For tax year 2026, Q4 is due January 15, 2027.
• Weekend and holiday shifts. If a due date falls on a Saturday, Sunday, or federal holiday, it moves to the next business day.

How to calculate each payment

There are two reasonable approaches, depending on how predictable your income is.

Method 1 — Annualize and divide by four

Best if your income is roughly steady month to month. The recipe:

1. Estimate your 2026 net profit (gross self-employment income minus business expenses).
2. Add any other expected income (W-2 wages, interest, etc.).
3. Subtract above-the-line deductions, including half your SE tax.
4. Subtract your standard deduction.
5. Look up federal income tax on the remaining taxable income using the 2026 brackets.
6. Add SE tax (15.3% × 92.35% of net profit, capped on the Social Security portion).
7. Subtract any W-2 federal withholding you’ll have.
8. Divide what’s left by 4.

That’s what the tax estimator on the home page does for you — fill in your numbers and it gives you a per-quarter amount directly.

Method 2 — Pay the safe-harbor minimum from last year

If your income jumps around — agency contracts, lumpy retainer renewals, a big launch — predicting 2026 is hard. There’s an easier path: pay quarterly amounts that cover 100% of your 2025 total tax (or 110% if your 2025 AGI was over $150,000).

Look up your 2025 total federal tax on Form 1040 line 24. Divide by 4. Pay that each quarter. Even if 2026 ends up much bigger, you have safe harbor: no underpayment penalty. You’ll still owe the difference at filing time — but no penalty for not having pre-paid it.

This is the standard advice for freelancers with growing or volatile income: pay safe-harbor minimums quarterly, save the rest aggressively in a tax savings account, and settle up in April.

How to actually pay

You have three good options. All of them route to the same place; pick one and stick with it.

IRS Direct Pay (recommended for most)

Free, no signup, pays directly from your bank account. Go to irs.gov/payments/direct-pay, choose “Estimated Tax (1040-ES),” select the tax year (2026), and enter the amount. You’ll get a confirmation number — save it.

Direct Pay is the right choice for almost everyone. It’s the fastest, has no fees, and confirms in your inbox in seconds.

EFTPS (Electronic Federal Tax Payment System)

Free, government-run, slightly more setup. You enroll at eftps.gov and get a PIN by mail (yes, by mail — allow 5–7 business days). After that, you can schedule payments up to 365 days in advance and look at year-to-date payment history in one place.

EFTPS is the right choice if you want to schedule all four quarterly payments at the start of the year, or if you’re managing multiple entities. The mail-delivered PIN means don’t wait until April 14 to enroll.

Paying by check with Form 1040-ES

Old-school but still allowed. Print the voucher from IRS Form 1040-ES, make your check payable to “United States Treasury,” and mail it to the address listed for your state. The IRS counts the payment as on-time based on the postmark date, not when they open the envelope.

Only use this if you genuinely prefer paper. The other two options are faster and give you a confirmation record automatically.

The safe-harbor rule, in plain English

The underpayment penalty applies if you owed more than $1,000 at filing time AND you didn’t pre-pay enough during the year. “Enough” is whichever of these is smaller:

• 90% of your actual 2026 tax — risky to estimate in advance, easy to get wrong, but you only ever owe the truth at the end.
• 100% of your 2025 tax (or 110% if 2025 AGI > $150,000) — fixed, knowable from your prior return, easy to hit.

Hit either bar and the penalty is $0. Most freelancers should target the prior-year safe harbor as their floor: it’s a known number, the IRS already accepts it, and it doesn’t punish you for a strong income year.

The penalty itself is computed quarter-by-quarter using a published interest rate, so even when it applies it’s usually modest — not a catastrophe, just an irritating extra. But the easy way to avoid it entirely is to send the prior-year safe-harbor amount each quarter on time.

Common mistakes

• Saving instead of paying. Stashing the money in a tax savings account is great — but if you don’t actually send it to the IRS by the quarterly deadlines, you can still get a penalty.
• Forgetting Q4 is in January. It’s easy to think “December → end of year → I’ll handle it with my return in April.” Q4 is due January 15, 2027 — three months before your filing deadline.
• Paying for the wrong tax year. When you make a payment in January 2027, Direct Pay will ask which year it applies to. The Q4 payment is for tax year 2026, not 2027.
• Ignoring state estimated taxes. Most states with income tax want their own quarterly payments, often on a different schedule. This guide covers federal only.

Sources

• IRS — Estimated Tax (general overview)
• IRS — About Form 1040-ES
• IRS — Self-Employment Tax
• IRS — Direct Pay