Learning Center
We keep you up to date on the latest tax changes and news in the industry.

Third Quarter Estimated Taxes Due September 15

For individuals who do not have enough tax withheld throughout the year, the third installment deadline for estimated taxes is September 15. At IRS Tax Pros, we want to ensure you stay ahead of this date so your tax situation remains on track.

Covering Non-Withheld Income with Form 1040-ES

This September 15 payment is generally submitted using Form 1040-ES. It serves a very specific purpose: covering income that is not fully satisfied through standard withholding. If you rely on self-employment income, generate investment returns, or receive funds from other sources where taxes are not automatically withheld, this third-quarter installment is what bridges the gap.

Cash representing estimated tax payments

Call Today
We solve tax problems for individuals and help tax pros solve tax problems for their clients.
Contact Us

Avoiding Underpayment Complications

If you rely on estimated tax payments, making this installment on time is essential. A timely payment is your primary defense to help avoid underpayment issues later in the year.

Resolve Your IRS Tax Challenges

We don't do bookkeeping or accounting at IRS Tax Pros—our sole focus is solving tax problems, and we do it well. If missed estimated payments have already snowballed into an underpayment issue with the IRS, contact Sharon Morgan, Enrolled Agent, to schedule a consultation and let America's tax expert help resolve your case.

Call Today
We solve tax problems for individuals and help tax pros solve tax problems for their clients.
Contact Us
Share this article...

Want tax & accounting tips and insights?

Sign up for our newsletter.

I confirm this is a service inquiry and not an advertising message or solicitation. By clicking “Submit”, I acknowledge and agree to the creation of an account and to the and .
IRS Tax Pros Ask Us A Question
Welcome To IRS Tax Pros Ai - Your smart assistant.
Please fill out the form and our team will get back to you shortly The form was sent successfully