Missed the June 15 Deadline? No Panic, Just a Plan (How to Minimize Penalties Now)

Strategic Recovery for Your Q2 Estimated Taxes

It happened. You looked at the calendar, saw June 16, and realized your second-quarter estimated tax payment is still sitting on your to-do list. Maybe you were busy scaling your business in California, navigating a real estate deal in Florida, or simply enjoying the start of summer.

Whatever the reason, the deadline has passed.

Now, before you let the stress of an impending IRS notice ruin your week, take a breath. While Uncle Sam isn’t known for his patience, he is predictable. If you missed the June 15 deadline, you are currently in “penalty territory,” but the damage isn’t fatal yet.

At Tax Expert Today LLC, we specialize in high net worth tax strategy nationwide and IRS resolution. We see this every year. The key isn’t to hide: it’s to act. Here is exactly how to stop the bleeding and safeguard your cash flow.

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Stop the Bleeding — Pay Right Now

The most important thing to understand about the underpayment of estimated tax penalty is that it is not a flat fee. It doesn’t work like a library fine where you pay $20 regardless of when you bring the book back.

The IRS calculates this penalty as an interest charge on the amount you owe, and it accrues daily.

Pay as much as you can immediately. Why? Because every day you wait, the “meter” is running. Even if you can’t pay the full amount you planned for Q2, paying a portion now stops the interest from accruing on that specific amount.

Ensure you use the correct portal. If you are a business owner or an executive, don’t just mail a check and hope for the best. Use the IRS Direct Pay system or the EFTPS (Electronic Federal Tax Payment System) to get a digital receipt. This documentation is your first line of defense if the IRS tries to claim you never paid.

Understanding the Q2 Penalty (It’s Interest, Not a Crime)

For those of us providing business tax advisory in California, Texas, Florida, and Georgia, we often have to clear up a common misconception: missing a quarterly estimate is not the same as failing to file your annual return.

The underpayment penalty (usually calculated on IRS Form 2210) is currently tied to the federal short-term rate plus 3%. In 2026, these rates are high enough to be painful but low enough to manage if you act fast.

Keep your records separate. The June 15 payment covers income earned from April 1 through May 31. If your business had a massive surge in May, your June payment should reflect that. If you wait until the September deadline to “catch up,” you’ll be paying interest on that May surge for an extra three months.

The Safe Harbor Strategy for High Earners

If you are worried about penalties, your best friend is the Safe Harbor rule. This is a legal “out” that prevents the IRS from charging you an underpayment penalty, even if you end up owing a large amount of money when you file your final return.

Check your 2025 tax return. To stay in the safe harbor, you generally need to pay in:

1. 90% of your total 2026 tax liability, OR
2. 100% of your total 2025 tax liability.

Don’t forget the “High Income” kicker. If your Adjusted Gross Income (AGI) was over $150,000 last year, the 100% rule doesn’t apply to you. You must pay 110% of last year’s tax to reach the safe harbor. This is a critical component of any high net worth tax strategy nationwide. If you missed the June 15 payment but your Q1 payment and your employer withholding already put you on track to hit that 110% mark by year-end, your penalty might be minimal or zero.

State Specifics: CA, TX, FL, and GA Business Owners

If you are running a business, you aren’t just dealing with the IRS. You have state obligations that often mirror: or complicate: the federal rules.

• California: The FTB is notoriously aggressive. They have their own underpayment rules that don’t always align perfectly with the IRS. If you missed the state estimate, use our California estimated tax penalty calculator to see where you stand.
• Georgia: Like California, Georgia requires quarterly estimates for most business owners. You can check your exposure with our Georgia estimated tax penalty calculator.
• Texas and Florida: While these states don’t have a state-level personal income tax, don’t let that lull you into a false sense of security. Your federal obligations as a resident of these states are exactly the same. We provide tax strategy consulting in CA, TX, FL, and GA specifically because the interaction between “no-tax” states and federal high-income rules requires a nuanced approach.

Special Warning for US Citizens Abroad

For Americans living overseas, June 15 is an even bigger deal. While most people have an April 15 deadline, U.S. citizens and resident aliens living abroad get an automatic two-month extension to June 15 to file their prior-year (2025) return.

Don’t confuse the filing extension with a payment extension. Even if you have until June 15 to file, interest on any 2025 taxes owed started accruing back on April 15. If you missed the June 15 deadline to file and pay your 2025 balance, you are now facing the failure-to-file penalty, which is 5% of the unpaid taxes for each month or part of a month that a tax return is late. This is much more expensive than the underpayment interest.

Safeguard your status. If you missed this, you need to file immediately. If you have a foreign bank account, you likely also missed the FBAR deadline (though that has an automatic extension to October in most cases). Check our guide on whether you need to file an FBAR to avoid even steeper penalties.

How to Get Penalties Removed

If you have a clean track record with the IRS, you might be eligible for First-Time Penalty Abatement. This is a “get out of jail free” card that the IRS doesn’t advertise, but it can wipe out penalties for a single tax year.

Ensure you meet the criteria. Generally, you must have had no penalties for the previous three tax years and be current on all your filings. We frequently use this as part of our IRS Resolution & Audit Support to save clients thousands of dollars. You can read more about the process in our guide on how to get IRS penalties removed.

Don’t ignore the notice. If you get a CP14 notice or a letter in the mail, do not stick it in a drawer. The IRS is much more willing to negotiate with someone who is proactive. If you’ve received a more serious letter, like an IRS Letter 1058, you need professional representation immediately.

Start Now: Your Action Plan

Missing a deadline is a mistake, but letting that mistake grow into a massive tax bill is a choice. Here is what you need to do in the next 60 minutes:

1. Calculate your shortfall. Use our IRS underpayment penalty calculator to get an estimate of what you owe for Q2.
2. Make a payment. Even a partial payment today is better than a full payment next week.
3. Review your Safe Harbor. Look at your 2025 return. Are you on track to hit 110% of last year’s tax? If so, the penalty for this specific missed deadline may be waived when you file next year.
4. Fix your bookkeeping. Most missed deadlines happen because the books aren’t ready. If you don’t know what you earned in April and May, you can’t pay the right amount.
5. Consult an expert. If your tax situation is complex: especially if you have multi-state income or foreign assets: you need a business tax advisory firm that understands the big picture.

Don’t let a small oversight become a permanent headache. We help business owners in California, Texas, Florida, and Georgia navigate these waters every day. Whether you need to catch up on missed payments or you’re looking for a comprehensive tax strategy consulting partner to ensure this never happens again, we are here to guide you.

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