When you work for an employer, federal income taxes and payroll taxes are automatically withheld from each paycheck. When you're self-employed — whether as a sole proprietor, freelancer, independent contractor, or gig worker — no one does that for you. The IRS expects you to pay taxes as you earn income throughout the year through quarterly estimated tax payments. Failing to make these payments, or underpaying them, results in an IRS underpayment penalty — even if you end up getting a refund when you file your annual return.
Who Needs to Pay Quarterly Estimated Taxes?
You generally need to make quarterly estimated tax payments if you expect to owe at least $1,000 in federal taxes for the year after accounting for withholding and credits. This typically applies to:
- Freelancers and independent contractors
- Sole proprietors and single-member LLC owners
- Gig economy workers (rideshare, delivery, short-term rental)
- Partners in partnerships and S corporation shareholders
- Landlords with rental income
- Investors with significant capital gains or dividend income not covered by withholding
W-2 employees with side income may also need to make payments if their withholding from their primary job doesn't cover the additional tax owed on their side earnings.
The 2026 Quarterly Estimated Tax Due Dates
| Payment Period | Due Date | Note |
|---|---|---|
| Jan 1 – Mar 31, 2026 | April 15, 2026 | Same day as annual filing deadline |
| Apr 1 – May 31, 2026 | June 16, 2026 | Shifted from June 15 (Sunday) |
| Jun 1 – Aug 31, 2026 | September 15, 2026 | |
| Sep 1 – Dec 31, 2026 | January 15, 2027 | Can skip if you file by Jan 31 |
Missing a due date doesn't mean you owe four times the penalty — the underpayment penalty is calculated separately for each quarter based on how much you underpaid and for how long. Catching up in a later quarter reduces but doesn't eliminate the penalty for the earlier period.
What Taxes Are You Actually Paying?
Your quarterly estimated payments cover two separate federal taxes:
- Federal income tax — calculated using the standard 2026 tax brackets applied to your net profit (after business deductions)
- Self-employment tax — 15.3% on the first $184,500 of net self-employment income (12.4% Social Security + 2.9% Medicare), then 2.9% above the wage base. You can deduct half of your SE tax from gross income when calculating income tax.
A common mistake: only estimating income tax and forgetting SE tax. For most self-employed people, SE tax alone runs 14–15% of net income — often larger than income tax for lower earners.
How to Calculate Your Quarterly Payment Amount
Method 1: Safe Harbor (Simplest)
Pay 100% of your prior year's total federal tax liability (Form 1040, line 24), divided into four equal payments. If your prior year AGI exceeded $150,000, pay 110% of the prior year's tax. This method protects you from underpayment penalties regardless of how much your income grows in the current year.
Example: Your 2025 total tax was $12,000. Divide by 4 = $3,000 per quarter. Pay $3,000 by each due date and you're penalty-free, even if your 2026 income doubles.
Method 2: Current-Year Estimate (More Accurate)
Use IRS Form 1040-ES to estimate your current-year income, deductions, and credits, then calculate expected tax owed and divide by four. This works better when your income is significantly different from last year — either much higher or much lower.
A Simple Estimation Shortcut
If you want a rough number without completing Form 1040-ES in full:
- Estimate your net self-employment income for the quarter (gross income minus business expenses)
- Multiply by 92.35% (the SE tax adjustment factor)
- Apply 15.3% to get your SE tax portion
- Estimate income tax by applying your expected bracket rate to your taxable income (after standard deduction and half of SE tax)
- Add SE tax + income tax, divide by 4
A practical rule of thumb for most self-employed workers in the 22% bracket: set aside 28–30% of every payment you receive. This covers SE tax (~15%) plus income tax (~13–15% effective rate), leaving a small buffer.
New OBBBA Deductions That May Reduce Your Payments
If you're eligible for any of the new deductions from the One Big Beautiful Bill Act, these reduce your taxable income and therefore your quarterly payment amounts:
- Tips deduction: Up to $25,000 for workers in qualifying tip occupations
- Overtime deduction: Up to $12,500 for workers receiving FLSA overtime pay
- Car loan interest: Up to $10,000 on new vehicle loans for personal use
- Senior deduction: $6,000 for taxpayers age 65 and older (income limits apply)
Make sure to factor these into your 1040-ES estimates if you qualify — they can meaningfully reduce quarterly payments.
How to Make Quarterly Payments
| Method | Cost | Best For |
|---|---|---|
| IRS Direct Pay (IRS.gov/directpay) | Free | One-time payments, no account needed |
| EFTPS (eftps.gov) | Free | Scheduling future payments in advance |
| IRS2Go app | Processing fee for cards | Mobile payments |
| Check with Form 1040-ES voucher | Postage only | Those without online access |
EFTPS is the most robust option for self-employed workers who want to schedule all four payments at the start of the year and not think about it again. Enrollment takes about a week to set up.
What Happens If You Underpay?
The IRS underpayment penalty for 2026 is calculated at the federal short-term interest rate plus 3 percentage points (currently around 8% annualized), applied to the underpaid amount for each quarter. The penalty is not catastrophic — but on a $5,000 underpayment over 9 months, it might run $300–$400. More importantly, it comes as a surprise at filing time that you can avoid entirely with accurate quarterly payments.
Use our Self-Employment Tax Calculator to estimate your SE tax for 2026 based on your net income. For a full picture including both SE tax and income tax, try our Income Tax Calculator.
State Estimated Tax Payments
Federal estimated payments cover only your federal tax obligation. Most states with income tax also require quarterly estimated payments on the same general schedule, though specific deadlines and safe harbor rules vary by state. A common mistake among new freelancers: paying federal estimates diligently but forgetting state estimates entirely, then facing a state underpayment penalty at filing. Check your state's department of revenue website for state estimated tax requirements and forms. States like California require Form 540-ES; New York uses Form IT-2105. Your state's deadline schedule may not exactly match the federal schedule.
What Happens If You Miss a Quarterly Deadline
Missing a quarterly estimated tax deadline does not mean you owe the entire penalty immediately. The IRS underpayment penalty is calculated separately for each quarter based on the amount underpaid and the number of days it was underpaid. If you missed Q2 but paid Q3 and Q4 on time, you owe a penalty only for the Q2 underpayment period. The annual Form 2210 (Underpayment of Estimated Tax by Individuals, Estates, and Trusts) is used to calculate the penalty, and the IRS may compute it for you if you leave that section of the return blank. In practice, the penalty is often less severe than feared -- but it is fully avoidable with timely payments. Use IRS Direct Pay or EFTPS to pay electronically and get instant confirmation that your payment was received and applied to the correct quarter.