09/02/2026
Most owners set their estimated tax payment back in January and never look at it again. Then September shows up, income has moved, and the payment goes out on autopilot.
That is worth a second look. If profit is running ahead of your original projection, adjusting now costs less than a surprise balance due next spring. If the quarter came in soft, the IRS safe harbor rules give you a legitimate way to pay less instead of overpaying out of habit. And if you are planning an equipment purchase before year end, that decision changes what you should be paying right now, not just in December.
We walked through the whole review in this week's blog: what to pull from your books first, how the 90 percent and 100 to 110 percent safe harbors actually work, and when it makes sense to move the number up or down.
Read the full post here:
https://busadvisory.com/september-estimated-tax-payments-what-to-review-first/