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Quarterly Estimated Taxes: A Complete Guide for Self Employed

‘Wait, I have to pay taxes FOUR times a year?’

That’s usually the reaction I get when I tell new business owners about quarterly estimated taxes. And I get it. When you’re used to getting a W-2 and filing once a year in April, the idea of calculating and paying taxes every three months feels overwhelming.

But here’s the truth: quarterly estimated taxes aren’t optional if you’re self-employed or own a business. The IRS expects you to pay taxes on your income throughout the year, not all at once in April. Miss those payments, and you’ll owe penalties even if you pay your full tax bill on time when you file your return. I’ve been helping Northern Virginia taxpayers navigate this system for over two decades, and I’ve learned that most people aren’t confused about why they have to pay quarterly taxes. They’re confused about how much to pay, when to pay it, and what happens if they don’t.

Who Has to Pay Quarterly Estimated Taxes?

You need to make quarterly estimated tax payments if:

  • You’re self-employed (freelancer, consultant, contractor, Uber driver)
  • You own a business (LLC, S-Corp, partnership, sole proprietor)
  • You have significant income that doesn’t have taxes withheld (rental income, investment income, gig work)
  • You expect to owe more than $1,000 in taxes when you file your return

The IRS rule is simple: If you’ll owe $1,000 or more in taxes after subtracting withholding and credits, you’re supposed to make quarterly payments.

Real example: A Centreville freelance web developer made $85,000 last year with no taxes withheld. Her total tax bill (income tax plus self-employment tax) will be around $21,000. She’s required to pay quarterly estimated taxes. If she waits until April to pay the full $21,000, she’ll owe penalties on top of the tax bill.

The Quarterly Payment Deadlines (They’re Not Actually Quarterly)

Here’s where it gets weird. They’re called ‘quarterly’ taxes, but the payment periods aren’t equal quarters. The IRS divides the year into four uneven periods:

Q1 Payment (for January 1 through March 31):

Due: April 15, 2026

Q2 Payment (for April 1 through May 31):

Due: June 16, 2026

Q3 Payment (for June 1 through August 31):

Due: September 15, 2026

Q4 Payment (for September 1 through December 31):

Due: January 15, 2027

Notice that Q2 only covers two months, not three. The IRS works in mysterious ways. And yes, you read that right: your Q4 payment for 2026 is due in January 2027, which is also when you’re filing your 2026 tax return. Fun times.

How Much Should You Pay? (The Question Everyone Gets Stuck On)

This is where most people freeze up. The answer depends on whether you want to play it safe or calculate precisely.

Option 1: The Safe Harbor Method (My Recommendation for Most People)

The IRS won’t charge you a penalty if you pay the lesser of:

  • 90% of your current year’s tax(if you can estimate it accurately), OR
  • 100% of last year’s total tax(110% if your adjusted gross income was over $150,000)

Most people use the second option because it’s simple: Look at last year’s return. Find your total tax (line 24 on Form 1040). Divide that by four. Pay that amount each quarter. Done.

Real example: A Fairfax contractor owed $28,000 in total tax for 2025. For 2026, he pays $7,000 per quarter ($28,000 divided by 4). Even if his income jumps and he ends up owing $35,000 for 2026, he won’t owe any underpayment penalties because he met the safe harbor (100% of last year’s tax).

Option 2: The Precise Method (For People With Wildly Fluctuating Income)

If your income varies wildly month to month, you can calculate what you actually owe each quarter based on your actual income. This requires more work, but it can save you money if your income is seasonal or unpredictable.

I usually only recommend this for clients whose income fluctuates by 50% or more quarter to quarter, like someone who makes most of their money in Q4 (holiday season retail or year end bonuses) but very little in Q1 through Q3.

How to Actually Make the Payment

You have three options:

  1. Pay Online (Easiest):

Go to IRS.gov/payments and use IRS Direct Pay (free) or pay by debit or credit card (small processing fee). You’ll need your Social Security number or EIN, and the payment will be processed immediately. This is what I recommend to most clients.

  1. Mail a Check:

Use Form 1040-ES (the payment voucher). Fill it out, write a check, and mail it to the IRS. Make sure to mail it early enough to arrive by the deadline. The postmark date matters, but if it arrives late, you could still face penalties.

  1. Set Up EFTPS (For Regular Users):

The Electronic Federal Tax Payment System lets you schedule payments in advance. It takes about a week to set up, but once you’re enrolled, you can schedule all four quarterly payments at once. This is great if you’re the type of person who forgets deadlines.

What Happens If You Miss a Payment?

You’ll owe an underpayment penalty. It’s not huge, usually around 7% to 8% annual interest, calculated from the date the payment was due until you pay it. But it adds up.

Real example: A Manassas salon owner missed her Q1 payment of $4,500 (due April 15) and didn’t pay it until she filed her return on April 15 of the following year. She owed about $315 in underpayment penalties for that quarter alone. Not the end of the world, but it’s $315 she could have kept in her pocket.

The good news: If you catch it quickly, just make the payment and move on. The penalty isn’t catastrophic. But if you make a habit of missing payments, it adds up fast. I’ve seen people owe $2,000 to $3,000 in penalties alone just from skipping quarterly payments for a year.

Don’t Forget Virginia State Estimated Taxes

If you live or work in Virginia, you also need to make quarterly estimated tax payments to the state. The deadlines are the same as federal:

  • April 15
  • June 15
  • September 15
  • January 15

You can pay online at Virginia Tax: https://www.tax.virginia.gov/online-services

Don’t make the mistake of paying only federal and forgetting Virginia. I see this constantly. People pay their federal quarterly taxes religiously and then get hit with Virginia penalties at the end of the year.

My Top Tips After Helping Thousands of Clients With This

  1. Set Up a Separate Savings Account for Taxes

Every time you get paid, transfer 25% to 30% of it into a separate account earmarked for taxes. When the quarterly deadline rolls around, the money is already there. No scrambling, no panic, no using money you thought you had for something else.

  1. Overpay Slightly Rather Than Underpay

If you’re not sure how much you’ll owe, round up. You’ll get the overpayment back as a refund when you file. It’s better than owing penalties. I tell my Centreville and Fairfax clients this all the time: the IRS will gladly give you your money back, but they won’t give you a pass on penalties.

  1. Set Calendar Reminders a Week Before Each Deadline

Don’t wait until the last minute. Payments can take a few days to process, and if you’re mailing a check, you need time for it to arrive. I recommend setting phone reminders for April 8, June 8, September 8, and January 8.

  1. Keep Records of Your Payments

When you make a payment, save the confirmation number or receipt. You’ll need it when you file your return to show what you already paid. I’ve had clients who made payments but couldn’t prove it because they lost the confirmation. Don’t be that person.

  1. If You Can’t Pay the Full Amount, Pay Something

If you’re having a rough quarter and can’t afford the full payment, pay what you can. The penalty is based on how much you underpaid, so paying 50% is better than paying nothing. And yes, the IRS accepts partial payments. They’d rather get something than nothing.

Real Talk: The Emotional Side of Quarterly Taxes

Let me be honest with you. Quarterly taxes suck. I know it, you know it, everyone knows it. Writing a check to the IRS four times a year is nobody’s idea of a good time.

But here’s what I tell every new business owner who sits down with me (virtually, since we’re digital first): this is part of being self-employed. You’re trading a steady paycheck with automatic withholding for the freedom to run your own business. That freedom comes with responsibilities, and quarterly taxes are one of them.

The good news? Once you’ve done it for a year, it becomes routine. You know when the deadlines are. You know roughly how much you owe. You set the money aside. It stops being scary and just becomes another part of running your business.

And if you really hate dealing with it, that’s what people like me are for. At LMN Tax, we can calculate your quarterly payments for you and even send you reminders before each deadline. You still have to write the check, but at least you won’t have to do the math or wonder if you’re doing it right.

Overwhelmed by Estimated Taxes? We Can Help.

At LMN Tax, we help self-employed and small business owners in Centreville, Fairfax, Manassas, and throughout Northern Virginia figure out exactly how much to pay in quarterly estimated taxes. We calculate the numbers, explain the process, and send you reminders before each deadline so you never miss a payment.

Call us at (571) 326-7900 or schedule a consultation at lmntax.com. We’re a digital first firm, so consultations are easy and convenient. We’ll set you up with a payment schedule and take the stress out of this whole process.

IRS Resources & References

Get My 2026 Tax Deadline Review
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