Life moves quickly. It’s easy to get distracted. But that can be costly.
Miss an important financial date or deadline, and you could be on the hook for a penalty or lose out on a limited-time opportunity to save money.
Enter our “Money Calendar” series.
In this edition, we’ve rounded up the noteworthy money dates in September 2025. Take a look and mark your calendar with any dates that apply to you. And if you enjoy this series, sign up for the Money Talks Newsletter so you don’t miss the next edition. Look for it on the last weekday of every month.
Mississippi’s Second Amendment sales tax holiday — Aug. 29-31
During the annual Mississippi Second Amendment Weekend — which runs from Aug. 29 until Aug. 31 — firearms, ammunition and certain hunting supplies are exempt from sales tax.
For more information, including a list of eligible and non-eligible items, check out the Mississippi Department of Revenue’s guide to this sales tax holiday.
Labor Day — Sept. 1
While the holiday itself isn’t observed until Monday, Labor Day sales are already underway. For starters, check out “10 Deep Discounts Available on Amazon This Friday, Including Early Prime Big Deal Days Savings.”
Also keep in mind that financial institutions likely will be closed.
Louisiana’s Second Amendment sales tax holiday — Sept. 5-7
Guns and ammunition as well as archery supplies and safety gear are among the types of products that will be exempt from sales tax in Louisiana during this time. Visit the state’s webpage about it for more information.
Florida’s outdoor sales tax holiday — starts Sept. 8
Hunting, fishing and camping supplies purchased in Florida will be exempt from sales tax from Sept. 8 until Dec. 31.
For a list of types of products that are eligible, visit the Florida Department of Revenue website.
Deadline for estimated tax payments — Sept. 15
This is the deadline for the third quarterly installment of estimated federal taxes for the 2025 tax year — the one for which your tax return is due by next April.
This deadline applies to the self-employed and other workers who earn income that isn’t subject to withholding, who use IRS Form 1040-ES to pay this tax.
FOMC meeting — Sept. 16-17
The Federal Reserve’s Federal Open Market Committee (FOMC) generally meets eight times a year. On the second day of these two-day meetings, the committee votes on whether to change its target range for the federal funds rate. So Sept. 17 is the next time that they might change it.
Any change to the federal funds rate can affect everything from your savings account yield to your credit card interest. To learn more about what this means for you, check out “What Is ‘the Fed’ — and Why Should You Care?”
Key Medicare literature to be mailed — sometime in September
If you are on a Medicare health insurance plan, such as a Medicare Advantage plan or standalone drug plan, keep an eye on your correspondence this month.
Sometime in September, your plan should send you two key documents that you will need to make informed decisions during upcoming open enrollment periods:
Additionally, you should receive a new “Medicare & You” handbook from the federal Medicare program in late September.
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