As Tax Day approaches each year, April 15 is one of the most important dates on the calendar for individuals and many businesses. Missing this deadline can lead to penalties, interest, and missed opportunities for deductions or refunds.

In this blog post, we’ll walk through:

What’s Due on April 15, 2025 (for Tax Year 2024)?

Form 1040 – Individual Income Tax Return

Form 4868 – Extension to File Individual Return

Form 1120 – C Corporation Tax Return

Form 5498-ESA – Education Savings Account Contributions

Contributions to IRAs and HSAs

First Estimated Tax Payment – Form 1040-ES

What’s NOT Due on April 15?

How to File an Extension (And Why You Might Want To)

For Individuals (Form 1040):

For C Corporations (Form 1120):

Important Note: Extensions Don’t Extend Payment Deadlines

How to Make a Payment to the IRS by April 15

Even if you're not ready to file your return, you can pay your estimated taxes through:

These payments can be designated as extension payments to be applied to your final return.

Final Thoughts

April 15 is more than just the deadline to file Form 1040. It’s a critical day for paying taxes, making retirement contributions, and staying compliant with the IRS.

Filing an extension can buy you time, but it won’t stop the clock on your tax bill. If you’re still gathering documents or working with your accountant, be sure to file Form 4868 or 7004 and make a payment to avoid interest and penalties.