Quarterly estimated taxes are pay-as-you-go payments to the IRS on income that has no tax withheld from it, like freelance, contractor, or business profit. Because you no longer have an employer withholding tax from a paycheck, you send the IRS your own income tax and self-employment tax in four payments across the year. You generally must pay if you expect to owe $1,000 or more in tax for the year after subtracting any withholding.

If you left a W-2 job to freelance or run a business, this is the part of self-employment nobody warns you about clearly. The good news: it's more spreadsheet than rocket science. Below is exactly who owes, how to figure your number, the four 2026 dates, how to pay in about five minutes, and what to do if you've already missed a quarter.

Do I even have to pay quarterly estimated taxes?

Ask yourself one question: after any tax already withheld (from a spouse's paycheck, a part-time W-2 job, or a side gig with withholding), do you expect to owe $1,000 or more when you file? If yes, you're on the hook for quarterly payments. If you'll owe less than $1,000, you can just settle up once at tax time with no penalty.

A few clarifying cases:

  • You had a loss this quarter. You don't owe an estimate for a quarter with no taxable profit. Quarterly payments are based on income actually earned, so a slow quarter can legitimately mean a $0 payment. Just keep records in case the IRS asks.
  • You also have a W-2 job. If enough is withheld there to cover your side income, you may owe nothing extra. You can also bump up that withholding (file a new Form W-4) instead of making estimates, since withholding counts as paid evenly across the year.
  • First year self-employed. If you had no tax liability last year and were a U.S. citizen/resident for the full 12 months, you're generally exempt from the underpayment penalty this year, even if you owe at filing. You still may want to pay so you're not hit with a big bill in April.

New to all of this? Start with our primer on self-employment taxes for the first time so the vocabulary below clicks.

The 2026 quarterly estimated tax due dates

Here are the four federal deadlines. The "quarters" are not even three-month chunks, which trips up almost everyone. Mark them now.

Payment Income earned 2026 due date
Q1 Jan 1 – Mar 31 April 15, 2026
Q2 Apr 1 – May 31 June 15, 2026
Q3 Jun 1 – Aug 31 September 15, 2026
Q4 Sep 1 – Dec 31 January 15, 2027

All four 2026 dates fall on a weekday, so there's no weekend or holiday shift this cycle. One handy shortcut: if you file your full annual return and pay everything you owe by January 31, 2027, you can skip the Q4 January payment.

How much should I pay? Two ways to calculate

You have two roads. Most beginners should take the second one.

Method 1: Estimate this year's actual tax (90% rule)

Project your net profit, calculate income tax plus self-employment tax (15.3% on net earnings for Social Security and Medicare), subtract deductions, and pay it in four chunks. The IRS wants at least 90% of your current-year tax paid through the year. Accurate, but it requires guessing income you haven't earned yet.

Method 2: Use the safe harbor (the beginner's best friend)

The "safe harbor" rule lets you base payments on last year's tax bill, which you already know. Pay in equal quarters:

  • 100% of last year's total tax if your prior-year adjusted gross income (AGI) was $150,000 or less, or
  • 110% of last year's total tax if your prior-year AGI was over $150,000 ($75,000 if married filing separately).

Hit that number across your four payments and the IRS cannot charge you an underpayment penalty, even if you end up owing more in April. You just pay the difference at filing. This is the safest way to avoid a penalty without obsessing over a moving income target.

Quick example. Last year your total tax was $8,000 and your AGI was under $150,000. Safe harbor = $8,000 ÷ 4 = $2,000 per quarter. Send that on each date and you're penalty-proof, full stop.

For a deeper walkthrough of the percentage to skim off each deposit, see how much you should set aside for taxes when self-employed.

Cut the number before you pay: deductions that shrink your estimate

Most beginners overpay because they calculate on gross revenue. You owe tax on profit, not sales. Before sizing a payment, subtract the deductions that move the needle most:

  • Ordinary business expenses (software, supplies, contractors, mileage, marketing).
  • Home office deduction if you work from a dedicated space.
  • Half of your self-employment tax, which is deductible against income tax.
  • Self-employed health insurance premiums.
  • Retirement contributions (a SEP-IRA or Solo 401(k) can defer a big chunk).
  • The QBI deduction (up to 20% of qualified business income for many pass-through owners).

These can easily cut taxable income by thousands. Our guide to self-employed tax write-offs and deductions lists the ones freelancers miss most.

How to actually set the money aside (the part guides skip)

Knowing the rule is useless if the cash isn't there in April. Do this:

  1. Open a separate "tax" savings account. A free high-yield account works. Out of sight, out of spending range.
  2. Skim a flat percentage off every deposit. A practical rule of thumb: move 25–30% of each payment you receive straight into that account the day it lands. Higher earners or high-tax states lean toward 30–35%.
  3. Pay the quarterly bill from that account. Because you've been setting aside per-deposit, the quarterly payment is just a transfer, not a scramble.
  4. Reconcile each quarter. If you overshot, you've got a buffer. If you undershot, top up next quarter.

This per-deposit habit also solves irregular or seasonal income: you're saving a percentage of whatever actually came in, so a fat month and a dead month both self-correct.

How to pay the IRS in about five minutes

You don't mail anything. Two free electronic options:

  • IRS Direct Pay — Best for individuals. No account needed. Pay directly from your checking/savings account. Choose "Estimated Tax" and the "1040-ES" tax year. Save the confirmation number.
  • EFTPS (Electronic Federal Tax Payment System) — Enroll once (takes a few days for the mailed PIN). Better if you want scheduled payments or you're paying business and personal taxes. Required for many corporations.

Either way, payment processes in minutes. You can also pay by debit/credit card through an IRS-approved processor, but they charge a fee, so stick with bank transfer.

Entity type changes the picture

How you pay depends on your business structure:

  • Sole proprietor / single-member LLC. Profit flows to your personal return. Pay estimates as an individual via Form 1040-ES. This is most freelancers.
  • Partnership / multi-member LLC. Each partner pays estimates individually on their share of profit.
  • S-corp shareholder. Your W-2 salary has tax withheld, which counts as paid evenly. But profit distributions on top of salary usually aren't withheld, so you often still owe personal estimates on those distributions.
  • C-corp. The corporation pays its own corporate estimated taxes, separate from your personal taxes.

Don't forget state (and sometimes city) estimates

Almost every guide ignores this, and it's a costly blind spot. Most states with an income tax run their own quarterly estimated system, with their own thresholds, due dates, and safe-harbor rules. High-tax states like California, New York, and Illinois are strict about it, and a few cities (e.g., New York City) layer on local tax too.

Action step: search "[your state] estimated tax payments" on your state's department of revenue site, note their dates and payment portal, and budget for state on top of the federal percentage you're already setting aside.

Want plain-English money and tax tips for freelancers in your inbox? Subscribe to the howtostart.biz newsletter and skip the jargon.

I missed a quarter. Now what?

Don't wait for the next deadline. The underpayment penalty is essentially interest charged daily on the shortfall, so the fix is simple: pay as soon as you can.

Your catch-up checklist:

  • [ ] Pay the missed amount immediately via IRS Direct Pay. Every day you wait adds a little interest; paying now stops the clock.
  • [ ] Pay your remaining quarters on time so you don't dig deeper.
  • [ ] Consider topping up W-2 withholding (yours or a spouse's) for the rest of the year. Withholding is treated as paid evenly across the year, so it can retroactively cover earlier quarters in a way a late estimate can't.
  • [ ] File Form 2210 at tax time to use the "annualized income" method, which can reduce or erase the penalty when income was lumped late in the year.
  • [ ] Don't skip your annual return over a missed quarter. The penalty for a late estimate is small; the penalty for not filing is not.

Missing one payment is a speed bump, not a disaster. The IRS just wants the money, plus a little interest for the delay.

Frequently Asked Questions

Do I have to pay quarterly estimated taxes if my business had a loss this quarter?

No. Estimated payments are based on income you actually earned. A quarter with no taxable profit can legitimately mean a $0 payment. Keep your records to show why, and remember a strong later quarter may bring the obligation back.

What's the safest way to avoid an IRS underpayment penalty without overpaying?

Use the safe harbor: pay 100% of last year's total tax in four equal installments (110% if your prior-year AGI was over $150,000). Meet that number and you're penalty-proof regardless of how much you actually earn this year. You simply settle any difference when you file.

Do S-corp owners pay quarterly estimated taxes the same way as sole proprietors?

Not exactly. S-corp owners take a W-2 salary with tax withheld, which counts toward their obligation evenly across the year. But profit distributions beyond salary usually have no withholding, so most S-corp owners still make personal quarterly estimates to cover the tax on those distributions.

How do I estimate taxes if my income is irregular or seasonal?

Two options. Set aside a flat 25–30% of every payment as it lands, so saving scales with whatever you actually earn. Or use the IRS "annualized income installment" method (Form 2210, Schedule AI) to match payments to when income arrives, so a big Q4 doesn't trigger penalties for quiet earlier quarters.

Are state estimated taxes the same as federal?

No. Most income-tax states run a separate quarterly system with their own thresholds, portals, and sometimes different due dates. Check your state's department of revenue site and budget for state tax on top of the federal amount you set aside. See the official rules at IRS.gov estimated taxes.