Taxes
Q3 Estimated Tax Payments Due Monday — Don't Miss the September 15 Deadline
via Kiplinger
The third-quarter estimated tax payment deadline falls on Monday, September 15. Freelancers, self-employed workers, investors, and anyone expecting to owe at least $1,000 after withholding must pay by then or face a 7% IRS underpayment penalty on the unpaid balance.
Why it matters
Missing this two-day deadline triggers compounding penalty interest that keeps growing until the balance is paid — a cost that's simple to avoid by submitting the payment before Monday.


