If you're self-employed, a freelancer, a 1099 contractor, or a small business owner, mark your calendar: June 15, 2026 is the deadline to make your second quarter estimated tax payment to the IRS.

Missing this deadline doesn't just mean a late payment — it can trigger underpayment penalties that add up fast. Here's everything you need to know to stay compliant and avoid unnecessary fees.

What Are Estimated Tax Payments?

When you work a traditional W-2 job, your employer withholds taxes from every paycheck and sends them to the IRS on your behalf. But when you're self-employed, no one is doing that for you.

The IRS expects you to pay your taxes as you earn — not just once a year at filing time. That's where estimated tax payments come in. These are quarterly payments you make directly to the IRS (and your state, if applicable) to cover your income tax and self-employment tax obligations throughout the year.

The 2026 Estimated Tax Payment Schedule

The IRS divides the year into four payment periods:

Payment Period Deadline
Q1 (January – March) April 15, 2026
Q2 (April – May) June 15, 2026
Q3 (June – August) September 15, 2026
Q4 (September – December) January 15, 2027

The Q2 deadline lands squarely on Monday, June 15, 2026 — no weekend or holiday shift this year, so don't expect any extra grace.

Who Needs to Make This Payment?

You likely need to make estimated tax payments if:

If any of these apply to you, the June 15th deadline is one you don't want to miss.

What Happens If You Miss It?

The IRS charges an underpayment penalty if you don't pay enough throughout the year. As of 2026, the penalty rate is tied to the federal short-term interest rate plus 3% — which means the longer you wait, the more it costs you.

The good news: the penalty is calculated per quarter, so making your Q2 payment on time limits the damage even if you missed Q1.

How Much Should You Pay?

1. The Safe Harbor Method

Pay at least 90% of what you expect to owe this year, OR 100% of what you owed last year (110% if your prior year income exceeded $150,000). If you meet either threshold, you avoid underpayment penalties — even if you end up owing more at filing time.

2. The Actual Income Method

Calculate your actual net income for the quarter, apply the self-employment tax rate (15.3%) and your estimated income tax rate, and pay that amount. This requires more tracking but can be more accurate if your income fluctuates.

Not sure which method works best for your situation? This is exactly where working with a tax professional pays off.

How to Make Your Payment

The IRS makes it easy to pay online:

  1. Go to IRS Direct Pay (free, no account needed)
  2. Select "Estimated Tax" as the reason for payment
  3. Choose "1040-ES" as the tax form
  4. Select the applicable tax year and payment period
  5. Enter your bank account info and submit

You can also pay via the IRS2Go app, by check (mailed with Form 1040-ES), or through the Electronic Federal Tax Payment System (EFTPS) if you've enrolled.

Don't Wait Until Tax Season to Think About This

One of the biggest mistakes self-employed individuals make is treating taxes as a once-a-year problem. By the time April rolls around, you could be looking at a large, unexpected tax bill — plus penalties for underpaying throughout the year.

Staying on top of quarterly payments isn't just about compliance. It's about cash flow management and avoiding financial surprises.