You finally went out on your own. Things are going well. Then around June, somebody mentions "quarterly estimated taxes" and your stomach drops.

If that's where you are right now, take a breath. Quarterly estimated taxes are one of the most common surprises for new self-employed people, and they're also one of the most fixable. By the end of this post, you'll know who has to pay, when payments are due, how to calculate what you owe, and exactly how to send the IRS its share.

What are quarterly estimated taxes?

Quarterly estimated taxes are payments you send to the IRS four times a year to cover your federal income tax and your self-employment tax (Social Security and Medicare). When you have a regular W-2 job, your employer takes care of this with each paycheck. When you're self-employed, that responsibility shifts to you.

The IRS expects you to pay taxes as you earn income, not in one giant lump in April. Quarterly payments keep you on track and help you avoid an underpayment penalty.

Who has to pay quarterly estimated taxes?

You generally have to pay quarterly if you expect to owe at least $1,000 in federal taxes for the year after subtracting any withholding and refundable credits. That covers most:

Freelancers and consultants
Gig workers (Uber, Lyft, DoorDash, Instacart, and similar platforms)
Independent contractors
Sole proprietors and single-member LLCs
Side hustlers who earned more than expected
Landlords and Airbnb hosts
Realtors paid on 1099s

If you also have a W-2 job, you might be off the hook if your employer withholds enough to cover your full liability. Otherwise, plan to pay quarterly.

💡 Tip: If you expect to owe less than $1,000 for the year, you don't have to pay quarterly. But most freelancers blow past that threshold after just a few clients. When in doubt, pay.

When are quarterly taxes due in 2026?

The IRS uses a slightly uneven schedule (the periods aren't actually three months long), but the deadlines fall on roughly the same dates each year:

Q1: April 15, 2026 — covers income earned January 1 to March 31
Q2: June 15, 2026 — April 1 to May 31
Q3: September 15, 2026 — June 1 to August 31
Q4: January 15, 2027 — September 1 to December 31

If a deadline lands on a weekend or federal holiday, it bumps to the next business day. Mark these in your calendar now. Missing one is the most common reason freelancers get hit with a penalty.

How to calculate what to pay

There are two ways to figure out your quarterly payment, and most self-employed people will use one of them.

Option 1: The 90% rule

Estimate your total tax for this year, then pay at least 90% of it across the four quarters. This works if your income is steady or you can predict it fairly well.

Option 2: The Safe Harbor rule (easier for most people)

Pay 100% of last year's total tax liability, split evenly across the four quarters. If your adjusted gross income last year was over $150,000, that bumps to 110%.

The Safe Harbor rule is the easier path for most freelancers because it's based on numbers you already have. Pull last year's Form 1040, find your total tax, divide by four, and pay that amount each quarter. As long as you do that, the IRS won't charge you an underpayment penalty even if you end up owing more in April.

Quick math example: Last year you owed $8,000 in federal taxes. Divide by four. You'd pay $2,000 each quarter to stay safe.

Want a deeper breakdown? Read how much to set aside for taxes as a freelancer and the self-employment tax rate explained.

$3K–$12K · The cost of disorganized books at tax time. Tax professionals find $3,000 to $12,000 in missed deductions on self-prepared Schedule C returns. Clean records mean none of it slips through the cracks.

How to pay your quarterly taxes

You have three solid options:

IRS Direct Pay (free and fastest). Go to irs.gov/payments, choose Direct Pay, and link your bank account. There's no fee, and you'll get a confirmation right away. This is what most people use.
EFTPS (Electronic Federal Tax Payment System). A free government system designed for ongoing tax payments. You'll need to enroll first (it takes about a week to receive your PIN by mail), but once you're set up you can schedule payments in advance.
Mail a check with Form 1040-ES. Fill out a payment voucher from Form 1040-ES, write a check to "United States Treasury," and mail it to the address listed on the form for your state. Slower and easier to lose track of, but a valid option.

Don't forget your state. Most states with income tax also require quarterly estimated payments, often on the same dates. Check your state's department of revenue website.

Common quarterly tax mistakes to avoid

Forgetting Q4 entirely. It's due January 15, right after the holidays, and people miss it constantly.
Not setting money aside as you earn. A good rule of thumb is to move 25 to 30% of every payment into a separate tax savings account the day it lands. (See how to avoid a surprise tax bill as a freelancer for more on this.)
Ignoring big income changes. If you have a huge quarter, your safe harbor amount might not cover what you actually owe. Adjust upward.
Paying the wrong agency. Federal goes to the IRS. State goes to your state. They are not the same.
Skipping a payment because you "didn't make much." You can pay zero if you genuinely didn't earn anything that quarter, but skip without checking and the penalty meter starts running.

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Common questions about quarterly estimated taxes

Do I have to pay quarterly taxes my first year of self-employment?

Technically no, since you can't owe a penalty in your first year if you didn't have a tax liability the year before. But starting quarterly payments anyway is a smart move. It builds the habit and prevents a brutal April surprise. Always consult a tax professional before deciding whether to pay or not pay.

What happens if I miss a quarterly payment?

The IRS charges an underpayment penalty, calculated daily based on how much you underpaid and for how long. It's not catastrophic (often $50 to a few hundred dollars), but it adds up fast over multiple missed quarters.

Can I just pay everything in April instead of quarterly?

You can, but you'll likely owe a penalty on top of the tax itself. The IRS treats this as a pay-as-you-go system. Note that single-member LLCs can file as a disregarded entity, which may affect how payments are reported.

How do I track what I've already paid?

Save your IRS confirmation emails, bank receipts, or canceled checks. You'll need the totals when you file your annual return on Form 1040.

Bottom line

Quarterly estimated taxes feel hard for two reasons: not knowing how much to pay and not knowing what's coming. Use the Safe Harbor rule (last year's tax divided by four) to set your payment, calendar all four IRS deadlines, and pay through IRS Direct Pay. Do that and you'll never see a surprise tax bill again.

How to File Quarterly Estimated Taxes as a Self-Employed Person