For the 2026 tax year, federal quarterly estimated taxes for most individual taxpayers (freelancers, side‑gig workers, investors, etc.) are due on these dates in 2026:

  • 1st quarter (income Jan 1–Mar 31, 2026): due April 15, 2026
  • 2nd quarter (income Apr 1–May 31, 2026): due June 15, 2026
  • 3rd quarter (income Jun 1–Aug 31, 2026): due September 15, 2026
  • 4th quarter (income Sep 1–Dec 31, 2026): due January 15, 2027

There is also a related date in January 2026 :

  • January 15, 2026: this is the final payment for 2025 Q4 income , not for 2026, but it often shows up on “quarterly taxes 2026” calendars because it lands in calendar year 2026.

Quick Scoop:

  • Quarterly taxes for the 2026 tax year hit in April, June, and September 2026, then January 2027.
  • If you owe estimated tax for late 2025 income, that last 2025 payment is due January 15, 2026.

Important:

  • These are federal IRS dates. Many states have their own estimated tax rules and calendars.
  • If you file your full return and pay in full early , you can sometimes skip the final January payment (for example, paying your remaining 2025 bill by the IRS’s early‑file date in early 2026).
  • For personalized advice (like whether you need to pay estimates at all, or how much), a tax professional or tax software that projects your income is strongly recommended.

TL;DR: When people ask “when are quarterly taxes due 2026” , they usually care about the 2026 estimated tax schedule above—just remember that the first “quarterly” date you’ll see in the 2026 calendar (Jan 15, 2026) actually belongs to 2025’s fourth quarter , while true 2026 estimates start on April 15, 2026.

Information gathered from public forums or data available on the internet and portrayed here.