Blog · Taxes · October 18, 2026

Quarterly Estimated Taxes: 2026 Due Dates and How to Pay Without the Stress

If you're self-employed, have a side hustle, or get income that doesn't have taxes taken out (rental income, investment gains, some retirement payouts), the IRS doesn't want to wait until April to hear from you. They want you to pay as you go, and that's what quarterly estimated taxes are.

This is one of the most-asked questions I get, so let's lay it all out: the dates, who has to pay, how to figure your amount, and how to dodge the penalty.

2026 Estimated Tax Due Dates

Here are the federal due dates for tax year 2026, straight from the 2026 Form 1040-ES:

Notice those "quarters" aren't equal. The second one is only two months long. That's how the IRS does it, and it catches people every year.

About that January payment: You don't have to make the January 15, 2027 payment if you file your 2026 return by February 1, 2027 and pay the entire balance due with it.

If a due date lands on a weekend or legal holiday, the payment is on time if made the next business day.

Who Has to Pay Estimated Taxes?

Generally, you need to make estimated payments if you expect to owe $1,000 or more when you file, after subtracting withholding and refundable credits. That commonly includes:

• Self-employed people, freelancers, and independent contractors
• Gig workers (rideshare, delivery, online sellers)
• Partners and S corporation shareholders
• Landlords with rental income
• People with sizable interest, dividends, or capital gains
• Retirees whose withholding doesn't cover their tax

If you have a W-2 job and a side hustle, you have another option: increase your W-2 withholding by filing a new Form W-4 with your employer. Withholding is treated as paid evenly throughout the year, which can help if you're behind.

How to Figure Your Estimated Tax Payments

The IRS gives you a worksheet in Form 1040-ES, but here's the idea in plain English:

1. Estimate your income for the year. Start with last year's return as a guide and adjust for what's changed.
2. Subtract deductions. For 2026, the standard deduction is $16,100 (single), $24,150 (head of household), or $32,200 (married filing jointly), unless you itemize.
3. Figure income tax using the 2026 tax brackets.
4. Add self-employment tax if you have business income (15.3% on 92.35% of net SE earnings, with the Social Security part capped at $184,500 in 2026).
5. Subtract credits and any withholding.
6. Divide what's left by four (or by the remaining payments).

Income changed mid-year? Refigure for the next payment. If you started earning later in the year or your income is lumpy, the annualized income installment method (Form 2210, Schedule AI) can lower or eliminate a penalty for earlier quarters.

The Safe Harbor Rules: How to Avoid the Penalty

You can generally avoid the underpayment penalty if your withholding and timely estimated payments total at least the smaller of:

• 90% of your 2026 tax, or
• 100% of the tax on your 2025 return (your return must cover all 12 months)

If your 2025 adjusted gross income was more than $150,000 ($75,000 if married filing separately), that second number becomes 110% of last year's tax.

The prior-year safe harbor is the one I love for self-employed folks with unpredictable income. You know the number up front, and you won't get penalized even if you have a great year, though you'll still owe the balance in April.

What If I Miss a Payment?

Take a breath. The penalty works a lot like interest: it's figured on how much you underpaid and for how long. So the best move is to pay as soon as you can, not to wait until April.

You can also be penalized for paying late even if you end up getting a refund. Timing matters, not just the total.

The IRS may waive the penalty in limited situations, such as a disaster or other unusual circumstances, or if you retired after age 62 or became disabled during the year (or the year before) and the underpayment was due to reasonable cause.

How to Pay Estimated Taxes

The easiest options:

• IRS Online Account. Pay and see your payment history in one place (IRS.gov/account)
• IRS Direct Pay. Free payments straight from your checking or savings
• Debit/credit card or digital wallet through IRS-approved processors (fees apply)
• IRS2Go app
• Mail a check with a Form 1040-ES voucher

You can pay more often than four times a year (monthly, every payday, whatever works) as long as enough is paid by each due date.

Heads up for mailers: The 2026 Form 1040-ES notes that a postmark is the date your payment is processed at a postal facility, which may not be the day you drop it in the mailbox. Mail early, or pay electronically.

Don't Forget Georgia

Georgia also expects estimated payments from individuals who don't have enough withheld. If you have significant self-employment or other income not subject to withholding, check the Georgia Department of Revenue's estimated tax guidance or ask me to figure your state number alongside your federal one.

A Simple Real-Life Example

Let's say Jasmine is a freelance graphic designer. Her total tax on her 2025 return was $8,000, and her 2025 AGI was under $150,000.

Using the prior-year safe harbor, she can pay 100% of last year's tax in four equal installments:

• $8,000 ÷ 4 = $2,000 per payment
• Paid by April 15, June 15, and September 15, 2026, and January 15, 2027

If she has a fantastic year and her 2026 tax ends up being $11,000, she'll owe the remaining $3,000 when she files, but generally no underpayment penalty, because she met the safe harbor.

(Simplified illustration. Your safe harbor amount depends on your actual return.)

GOAT tip: Set calendar reminders two weeks before each due date, and pay electronically so you get instant confirmation.

Frequently Asked Questions

When are 2026 quarterly estimated taxes due?

April 15, 2026; June 15, 2026; September 15, 2026; and January 15, 2027.

Who has to pay quarterly estimated taxes?

Generally, anyone who expects to owe $1,000 or more when they file after withholding and credits, especially self-employed people, gig workers, landlords, and investors.

What is the safe harbor for estimated taxes?

Pay at least 90% of this year's tax or 100% of last year's tax (110% if last year's AGI was over $150,000, or $75,000 if married filing separately) through withholding and on-time estimated payments.

Can I make one big estimated payment instead of four?

You can pay all of your estimated tax by the first due date (April 15 for 2026). Making one payment late in the year usually won't avoid penalties for earlier quarters, unless the annualized method applies.

What's the penalty for not paying estimated taxes?

It's calculated based on the amount underpaid, how long it was underpaid, and the IRS interest rate for each quarter. The fastest way to reduce it is to pay as soon as possible.

Let's Figure Out Your Number

You shouldn't have to guess. I'll calculate your estimated payments, set you up with a payment plan for the year, and help keep the penalty off your return. Book at virginiaharrisenterprise.com or call 770-375-0353.

Notes & Sources

• Due dates, Feb. 1, 2027 exception, postmark note, annualized method: 2026 Form 1040-ES (irs.gov/pub/irs-pdf/f1040es.pdf).
• $1,000 rule, 90%/100% safe harbor, payment methods: IRS "Estimated taxes" (irs.gov/businesses/small-businesses-self-employed/estimated-taxes).
• 110% for AGI over $150,000 / $75,000 MFS: Form 1040-ES and Pub. 505.
• Waiver circumstances and penalty mechanics: IRS "Underpayment of estimated tax by individuals penalty."
• 2026 standard deduction: IR-2025-103. Wage base: SSA.