Happy Friday, all!

September 15 is one of those dates that can sneak up on business owners—so consider this your friendly reminder.

For individuals making quarterly estimated tax payments, your third-quarter 2026 estimated tax payment is due Tuesday, September 15. It’s also the extended filing deadline for calendar-year S corporations and partnerships that filed timely extensions for their 2025 returns.

But instead of treating September 15 as just another tax deadline, I encourage you to use it as a financial checkpoint.

Take a few minutes to ask: Does the tax amount I planned earlier this year still make sense?

Maybe revenue has grown faster than expected. Maybe you’ve had a slower year. Or perhaps your expenses, compensation, or business structure have changed. Estimated taxes are based on estimates—and those estimates deserve to be revisited as your business evolves.

As we head toward Q4, this is also a great time to review your year-to-date profit, cash reserves, and projected income through December. A little planning now can help reduce surprises when tax season arrives.

Deadlines matter. But understanding what the numbers are telling you matters even more.

Questions of the Week

1. Is my current tax plan still aligned with how my business is actually performing?
2. What has changed financially since I made my last estimated payment?
3. What financial decision should I make now to set myself up for a stronger Q4?

Tool of the Week

Your year-to-date Profit & Loss statement. Run one through August 31 and compare actual revenue and profit with what you projected at the beginning of the year. Then use that information to start a conversation with your tax professional before year-end.

Have a wonderful weekend!

Best,

Brian