If you receive a W-2 from an employer, your income taxes are withheld automatically from every paycheck. As a self-employed freelancer, no one does that for you. You're required to estimate your annual tax liability and pay it to the IRS in four installments — called quarterly estimated tax payments.
Miss them, and you'll face an underpayment penalty plus a surprise tax bill in April. Get them right, and you avoid both.
2026 Quarterly Tax Payment Deadlines
| Quarter | Income Period | Payment Due | |---------|--------------|-------------| | Q1 | January 1 – March 31 | April 15, 2026 | | Q2 | April 1 – May 31 | June 16, 2026 | | Q3 | June 1 – August 31 | September 15, 2026 | | Q4 | September 1 – December 31 | January 15, 2027 |
Note: When the deadline falls on a weekend or federal holiday, it moves to the next business day. Always confirm at IRS.gov.
Who Must Pay Quarterly Taxes?
You're required to pay quarterly estimated taxes if:
- You expect to owe $1,000 or more in federal tax for the year, AND
- Your withholding will be less than the smaller of: (a) 90% of your current year's tax, or (b) 100% of your prior year's tax liability
If you're a freelancer, independent contractor, gig worker, or self-employed professional earning more than $400 from self-employment, you almost certainly need to pay quarterly taxes.
How to Calculate Your Quarterly Tax Payment
The basic formula:
Estimated Annual Self-Employment Income × 0.9235 × 15.3% (SE tax) + Federal Income Tax = Annual Tax Due** **Annual Tax Due ÷ 4 = Quarterly Payment
### Step-by-Step Calculation Example
Say you expect to earn $80,000 net from freelancing in 2026:
Step 1: Calculate self-employment tax $80,000 × 0.9235 = $73,880 (net earnings subject to SE tax) $73,880 × 15.3% = $11,304 (SE tax)
Step 2: Calculate income tax Deduct half your SE tax: $11,304 ÷ 2 = $5,652 deduction Adjusted gross income: $80,000 − $5,652 = $74,348 Subtract standard deduction ($14,600 for single filer 2026): $74,348 − $14,600 = $59,748 Federal income tax on $59,748 (at 22% marginal rate): roughly $7,000–$9,000
Step 3: Total annual tax estimate** SE tax ($11,304) + income tax (~$8,000) = ~$19,304 Quarterly payment: $19,304 ÷ 4 = **~$4,826 per quarter
Use our Self-Employment Tax Calculator for your state-specific calculation — some states have their own quarterly estimated tax requirements on top of federal.
Safe Harbor: How to Avoid the Underpayment Penalty
You can avoid the underpayment penalty by meeting one of these "safe harbor" thresholds:
- Pay 90% of your current year's tax liability across four payments, OR
- Pay 100% of your prior year's tax liability (110% if your AGI was over $150,000)
The easiest approach: Take your prior year's total federal tax bill and divide by 4. Pay that amount each quarter. You're safe from penalties regardless of how much you actually earn this year.
What Happens If You Miss a Quarterly Tax Deadline?
The IRS charges an underpayment penalty. As of 2026, the penalty rate is the federal short-term interest rate + 3% (currently around 7-8% annualized). It's calculated per quarter, not as a flat fee.
Example: You underpay by $2,000 for one quarter. At 8% annualized, the penalty on that underpayment is roughly $40–$80 for the quarter. Not catastrophic, but it adds up across four quarters.
More importantly: If you skip quarterly payments entirely, you'll owe the full year's taxes on April 15 — potentially $15,000–$30,000 all at once, plus penalties and interest.
State Quarterly Taxes
Most states that have income tax also require quarterly estimated payments. Deadlines generally align with federal dates, but not always. Check your state's tax agency website, or use our state-specific calculators:
- •California Quarterly Tax Calculator
- •Texas (no income tax)
- •New York Quarterly Tax Calculator
- •Florida (no income tax)
How to Pay Your Quarterly Taxes
Online (recommended): IRS Direct Pay at irs.gov/payments — free, immediate, and you get instant confirmation.
IRS2Go app: The official IRS mobile app supports direct bank payments.
EFTPS (Electronic Federal Tax Payment System): Required if you pay more than $2,500/quarter. Free and accurate.
Check by mail: Mail to your regional IRS lockbox. Slower and less recommended — no instant confirmation.
For the full guide on freelance taxes, see our Complete Freelance Tax Guide 2026. For avoiding penalties specifically, read our IRS Underpayment Penalty Guide.