How Quarterly Taxes Work
When you have a regular W-2 job, your employer quietly withholds federal income tax, Social Security, and Medicare from every paycheck and forwards it to the IRS for you. As a freelancer, gig worker, or 1099 contractor, that withholding doesn't happen — so the IRS asks you to send your own taxes in four times a year. That's what "quarterly estimated taxes" are. Here's how the system actually works.
What are quarterly estimated taxes?
Quarterly estimated taxes are four payments you send to the IRS during the year that together cover two things at once: federal income tax (10%–37% of your taxable income, on a sliding scale) and the 15.3% self-employment tax that funds Social Security (12.4%) and Medicare (2.9%). The form used to pay them is Form 1040-ES. The amounts are estimates — you reconcile the exact figure on your annual Form 1040 the following April.
Who has to pay them?
The IRS rule is short: if you expect to owe more than $1,000 in federal tax for the year after subtracting any tax already withheld, you're required to pay quarterly. In practice, that means:
- Full-time freelancers and 1099 contractors — almost always required.
- Gig workers (rideshare, delivery, online platforms) — required once net earnings exceed roughly $5,000–$8,000.
- Sole proprietors and single-member LLCs — required.
- W-2 employees with a small side hustle — usually not required if W-2 withholding is enough to cover total tax. You can also bump up W-2 withholding instead of paying quarterly.
- S-corp owners — yes, on the K-1 portion of their pass-through income.
The 2026 IRS quarterly schedule
Despite the name "quarterly," the IRS calendar is uneven. The first three deadlines arrive in April, June, and September; the fourth slides into the following January.
| Quarter | Income earned during | Payment due |
|---|---|---|
| Q1 | Jan 1 – Mar 31, 2026 | April 15, 2026 |
| Q2 | Apr 1 – May 31, 2026 | June 15, 2026 |
| Q3 | Jun 1 – Aug 31, 2026 | September 15, 2026 |
| Q4 | Sep 1 – Dec 31, 2026 | January 15, 2027 |
If a deadline falls on a weekend or federal holiday, it slides to the next business day. Most US states with an income tax mirror this schedule for their own quarterly forms; California is a notable exception (its 540-ES splits 30% / 40% / 0% / 30%). Residents of Texas, Florida, Nevada, Washington, and the other no-tax states skip the state quarterly entirely.
Why freelancers pay them (and W-2 employees don't)
The US tax system is "pay-as-you-go." The IRS doesn't let you wait until April to settle the year's bill — it wants the money throughout the year. For W-2 employees, that's invisible because employers withhold every paycheck. Freelancers don't have an employer, so they pay themselves: four times a year, by check or online, using Form 1040-ES.
Why this matters
If you wait until April to pay everything at once, you'll owe an underpayment penalty even if you pay in full. The IRS treats missed quarters individually — a Q1 underpayment is more expensive than a Q4 one because it's been "missed" for longer.
Simple example: a $60,000 freelancer
Imagine a freelance designer earning $60,000 net (after $5,000 in business expenses) in 2026, single filer, no W-2 income. The math:
| Net self-employment income | $55,000 |
| Self-employment tax (15.3%) | $7,772 |
| Federal income tax | $2,460 |
| Total federal + SE tax | $10,232 |
| Quarterly payment (1040-ES) | $2,558 |
That $2,558 is what gets sent to the IRS on each of the four 2026 deadlines. The freelancer plus a state-tax payment (if living in a state with income tax) — and that's it. Tracking Schedule C deductions like the home office deduction and business mileage directly lowers each quarterly payment by reducing the underlying tax base.
Penalties: what happens if you skip a quarter?
The IRS charges interest on missed estimated payments — currently around 8% APR, set quarterly. The penalty is calculated separately for each missed period, so a Q1 miss accrues for 12 months while a Q4 miss accrues for only 3. Two ways to avoid the penalty:
- Pay 90% of your current-year tax evenly across the four quarters, OR
- Pay 100% of last year's total tax evenly across the four quarters (110% if last year's AGI exceeded $150,000).
Either method puts you inside the IRS "safe harbor" — even if you owe more at filing, the underpayment penalty is waived.
How to actually send the payment
The fastest free method is IRS Direct Pay at IRS.gov — no account needed, takes about 60 seconds. Other options: the IRS2Go mobile app, EFTPS (free, requires registration), or mailing a 1040-ES voucher with a check. Avoid paying by debit/credit card unless you must — third-party processors charge 1.85%–1.98% in fees the IRS itself doesn't collect.
Common freelancer questions
What are quarterly estimated taxes?
Four payments sent to the IRS during the year, covering federal income tax + 15.3% self-employment tax, using Form 1040-ES.
Who must pay them?
Anyone who expects to owe more than $1,000 in federal tax for the year after withholding. Most full-time 1099 freelancers cross this threshold easily.
What are the 2026 deadlines?
April 15, 2026; June 15, 2026; September 15, 2026; and January 15, 2027.
What's the cheapest way to pay?
IRS Direct Pay (free) or EFTPS (free, requires account). Avoid paying by card if possible — third-party fees of 1.85–1.98% add up.
What if my income is unpredictable?
You can pay using the "annualized income" method on Form 2210, which lets you pay smaller amounts when you earn less and larger amounts later. Most freelancers find it easier to base each quarter's payment on year-to-date earnings.
Related guides & calculators
Last updated: January 15, 2026. Disclaimer: This guide is educational only. It is not tax or legal advice. Consult a licensed CPA before making filing decisions.