Last Chance to File: September 15 and October 15 Tax Deadlines

he September 15 and October 15 Deadlines Are Almost Here

With the September 15 and October 15 deadlines almost here, this is the last stop for anyone who filed an extension earlier this year. September 15 is the final due date for partnership and S-corporation returns, and October 15 is the final due date for individual returns. After those dates, most filers have no further extension to fall back on, so the return is either filed or it is late.

That distinction matters because the IRS charges real money for missing the deadline. If you owe tax and file late, the failure-to-file penalty runs at five percent of the unpaid balance for each month you are late, up to a maximum of twenty-five percent. On top of that, the failure-to-pay penalty adds another half a percent per month, and interest keeps accruing on whatever you still owe until it is paid off. These charges stack quietly and can turn a manageable bill into a much larger one.

The bigger issue we see every year is timing on your end. When investors wait until the first week of October to send over their documents, there simply is not enough time to prepare the return well. Rushed returns are where missed deductions, overlooked depreciation, and simple errors tend to creep in, and those mistakes often cost more than the penalty would have. Getting your books, closing statements, and K-1s to your preparer now, rather than a few days before the deadline, gives us the room to plan and file something accurate.

If you extended this year, treat the next few weeks as the real deadline. Pull your documents together and send them over early. It is the simplest way to avoid penalties, protect your deductions, and close out the year without the last-minute scramble.