The Extension Illusion: What Extra Time Means for Your Taxes

April 15th has come and gone. If you were one of the millions of Americans who filed a tax extension this year, you likely breathed a massive sigh of relief when that paperwork went through. You bought yourself some breathing room—but what exactly did you buy?

There is a massive misconception surrounding tax extensions, and misunderstanding the rules can lead to unexpected penalties. Whether you are an individual taxpayer or a small business owner, here is what your extension actually means for your finances.

The Golden Rule: Time to File vs. Time to Pay

The most critical thing to understand is that an extension (Form 4868 for individuals, or Form 7004 for businesses) gives you an additional six months tofile your paperwork. It doesnotgive you an extension topay the taxes you owe.

If you expected to owe the IRS money this year, that balance was still due on April 15th.

• If you paid an estimated amount with your extension:Great! When we finalize your return, we will settle the exact difference. If you overpaid, you’ll get a refund. If you underpaid slightly, you will owe the remaining balance plus a little bit of interest.

• If you filed an extension but paid nothing:You will continue to accrue interest and late-payment penalties on the unpaid balance until the return is filed and the tax is paid in full.

What Should You Do Now?

If you are sitting on an extension until the October 15th deadline, your work isn’t quite done. Here is how to use this extra time wisely:

1. Track Down the Missing PiecesMost people file extensions because they are waiting on complex forms—usually Schedule K-1s from partnerships or S-Corporations, or corrected 1099s. Use the summer months to gently follow up with the entities that owe you these documents so you aren’t scrambling in the fall.

2. Maximize Business Retirement ContributionsWhile traditional IRA and Roth IRA contributions were due on April 15th, small business owners with extensions have a unique advantage. If you have a SEP IRA or a Solo 401(k), your deadline to fund those accounts and take the deduction on your 2025 return is extended right along with your filing deadline. This gives you until the fall to build up the cash for a strategic contribution.

3. Beat the October RushTax professionals experience a “second tax season” in September and October. Do not wait until October 1st to bring your remaining documents to your advisor. Filing your return in June or July ensures you get plenty of dedicated time to review your financial picture without the pressure of a looming autumn deadline.

The Bottom Line:An extension is a fantastic tool for ensuring your tax return is accurate and comprehensive—but it isn’t a free pass to ignore your taxes until October (or September if you’re an S-Corp). At Johnson & Stern, we are here to help you turn that extension into a completed, optimized return. Reach out today so we can finalize your paperwork while the year is still young!