2025 Fall Tax Deadlines You Don't Want to Miss
- Lauren Knoll
- Sep 25, 2025
- 3 min read
Updated: Jan 7
September is almost over, and fall is in full swing now, which means pumpkin spice everything and... oh yeah, some pretty important tax deadlines. Talking about deadlines when you're just trying to enjoy fall vibes isn't fun, but staying on top of these dates now means you can relax and enjoy your seasonal latte without that nagging "did I forget something important?" feeling.
Whether you're running a business, freelancing, or just trying to keep your financial life together, these fall deadlines matter. Let's break them down so you know exactly what's coming.

September 15: Third Quarter Estimated Tax Payments (Already Passed!)
Who this affects: Self-employed individuals, freelancers, contractors, or anyone earning money without automatic tax withholding.
If you're in this boat, September 15th was your deadline for Q3 estimated payments. If you missed it, don't panic, but we do need to get you caught up ASAP to minimize penalties and interest.
Here's why this matters: Think of estimated payments like putting money aside so April doesn't hit you with a surprise bill that ruins your whole month. The IRS wants its money throughout the year, not all at once in the spring.
Pro tip: If your income has increased this year (hello, successful business owners!), your estimated payments might need to increase, too. We've helped plenty of clients avoid that "Oh no, I owe HOW much?" moment with some simple adjustments.
September 15: Partnership and S Corporation Extended Returns (Already Passed!)
Who this affects: Partnerships (Form 1065) and S corporations (Form 1120S) that filed extensions.
If you filed an extension for your business return, September 15th was your final deadline. If you missed it, there are no further extensions available.
Why this matters: Business returns often affect the owners' tax situations. Filing late doesn't just mean penalties for the business; it can create a domino effect that complicates everyone's taxes.
If you missed the deadline: Contact us immediately to get these filed and discuss penalty mitigation strategies. The sooner you file, the better your position will be.
October 15: Extended Individual Tax Returns Are Really, Truly Due (Already Passed!)
Who this affects: Anyone who filed for an extension on their tax return back in April.
This is it, the final countdown. No more extensions, no more "I'll get to it next week." October 15th is the absolute last day to file your return (Form 1040) without facing late filing penalties.
Here's the reality check: That extension you filed? It gave you extra time to file, not extra time to pay. If you owe money, interest has been adding up since April 15th.
What to do now: Stop putting it off. Gather your documents, find those receipts you swore you'd organize "later," and let us help you get your return filed. Your stress levels (and your wallet) will thank you.
While We're Talking Fall Tax Strategy...
Since you're already thinking about deadlines, this is the perfect time to look ahead and make some smart moves for the rest of the year.
Fall is the prime time to review your whole financial picture. How's your income looking compared to last year? Are you on track with deductions? Any big changes in your life or business that might affect your taxes?
Don't Let Fall Tax Deadlines Stress You Out
Fall tax deadlines can feel overwhelming, especially when you're juggling everything else in your life or business. The stress of missing deadlines is always worse than the effort of meeting them.
Missing tax deadlines can cost you:
Penalty fees that add up fast
Interest charges that keep growing
Sleep (because money stress is the worst kind of stress)
Opportunities to save money with better planning
The better approach: Set those phone reminders now. Put these dates in your calendar. And if you're feeling overwhelmed or unsure about anything, reach out for help.
We're Here When You Need Us
At Denise Stubbs CPA, we believe your financial peace of mind shouldn't depend on remembering random dates throughout the year. We help our clients stay ahead of deadlines, plan strategically, and sleep better knowing their taxes are handled properly.
Whether you missed these recent September deadlines and need help getting caught up, want to plan ahead for the remaining year-end deadlines, or just have questions about your specific situation, give us a shout.
Ready to get ahead of the game?
Call us: (828) 570-5760
Email us: info@denisestubbscpa.com
This blog post is provided for educational purposes only and does not constitute personalized financial, tax, or investment advice. Tax laws are complex, change frequently, and vary based on individual circumstances. Before implementing any strategies discussed, please consult with qualified financial advisors, tax professionals, or CPAs who can assess your specific situation. This content should not be relied upon as a substitute for professional consultation.
Comments