If you’re self-employed, no one withholds tax from your income the way an employer would for a W-2 worker. That’s exactly why quarterly estimated tax payments exist — and why missing them can mean an unpleasant penalty at tax time, even if you eventually pay everything you owe.
This guide explains who needs to make estimated payments, how to calculate them, and how to avoid the most common mistakes self-employed workers make.
What Are Quarterly Estimated Tax Payments?
Quarterly estimated tax payments are payments made directly to the IRS throughout the year to cover income tax and self-employment tax on income that isn’t subject to withholding. Instead of paying everything at once in April, self-employed individuals pay in four installments spread across the year.
Who Needs to Make Estimated Tax Payments?
You generally need to make quarterly payments if you expect to owe at least $1,000 in tax for the year after subtracting withholding and refundable credits. This commonly applies to:
- Freelancers and independent contractors
- Small business owners and sole proprietors
- Partners in a partnership
- S-Corp shareholders receiving distributions beyond their salary
- Landlords with significant rental income
2026 Quarterly Estimated Tax Deadlines
| Payment Period | Due Date |
|---|---|
| January 1 – March 31 | April 15 |
| April 1 – May 31 | June 15 |
| June 1 – August 31 | September 15 |
| September 1 – December 31 | January 15 (following year) |
If a due date falls on a weekend or holiday, the deadline shifts to the next business day.
How to Calculate Your Estimated Tax Payments
Step 1: Estimate Your Total Annual Income
Start with a realistic projection of your self-employment income for the year, including all 1099 income and other untaxed earnings.
Step 2: Calculate Expected Self-Employment Tax
Self-employment tax covers Social Security and Medicare and currently totals 15.3% on net self-employment earnings, though half of this is deductible.
Step 3: Estimate Your Income Tax Liability
Apply your expected tax bracket to your projected taxable income after deductions.
Step 4: Divide by Four
Once you have your total estimated liability, divide it into four payments, adjusting later quarters if your income changes significantly.
Step 5: Submit Payment Using Form 1040-ES
Payments can be submitted electronically through the IRS’s online payment system or by mailing a voucher from Form 1040-ES.
What Happens If You Underpay?
The IRS can charge an underpayment penalty if you don’t pay enough throughout the year, even if you pay your full balance by the April filing deadline. Generally, you can avoid a penalty if you’ve paid:
- At least 90% of your current year’s tax liability, or
- 100% of the prior year’s tax liability (110% if your income was above a certain threshold)
Because self-employment income often fluctuates, many self-employed workers find it safer to base payments on the “safe harbor” of the prior year’s liability rather than trying to predict the current year exactly.
Common Mistakes Self-Employed Workers Make
- Waiting until the annual filing deadline to pay everything at once
- Underestimating self-employment tax on top of regular income tax
- Not adjusting later payments after a strong quarter of income
- Forgetting that state estimated tax payments may also be required separately
- Missing a quarterly deadline entirely, which triggers penalties even on an otherwise accurate annual payment
Tips for Staying on Top of Estimated Payments
Set aside a percentage of every payment you receive — many self-employed workers use 25–30% as a starting benchmark, adjusted based on their specific tax situation
Keep a separate savings account dedicated only to tax payments
Review your income and adjust your next payment at the end of each quarter rather than waiting until year-end
Track deductible business expenses throughout the year so your estimate reflects your true taxable income, not just gross revenue
Do You Need Help Calculating Your Payments?
Estimating quarterly payments accurately gets more complex as your income grows or varies month to month. Working with a tax professional who understands self-employed tax preparation can help you avoid both underpayment penalties and overpaying more than necessary throughout the year.
Frequently Asked Questions
Do I have to make quarterly payments if I have a regular job too?
If you have significant self-employment income on top of W-2 wages, you may still need to make estimated payments, or you can sometimes increase your W-2 withholding instead to cover the difference.
What happens if I miss a quarterly deadline?
You may owe an underpayment penalty for that period, even if you catch up in a later quarter. It’s best to pay as soon as possible if you miss a deadline, rather than waiting for the next one.
Can I pay more than the minimum in one quarter to catch up?
Yes, and doing so as soon as you realize a shortfall reduces the penalty period compared to waiting until the next scheduled payment.
Do I need to make state estimated tax payments too?
Many states with income tax also require quarterly estimated payments, separate from federal payments. Check your specific state’s requirements.
How do I know how much to pay each quarter?
A common approach is to base payments on 100–110% of last year’s total tax liability divided into four installments, adjusting later in the year if your income changes significantly.
Can an accountant help me set up a payment schedule?
Yes — a tax professional can project your liability based on your actual income patterns and help you avoid both penalties and unnecessarily large payments.
Stay Ahead of Your Estimated Tax Payments
Don’t wait for a penalty notice to find out your payments were off. Schedule a consultation to get a payment plan built around your actual income.