january 15
Q4 estimated taxes due (prior year)
Self-employed & investors: the last quarterly payment for last year. remind me →
Self-employed & investors: the last quarterly payment for last year. remind me →
january 31
W-2s & 1099s must be sent
Employers: forms out to workers and the IRS. Workers: start watching the mailbox. remind me →
Employers: forms out to workers and the IRS. Workers: start watching the mailbox. remind me →
march 15
S-corp & partnership returns (1120-S, 1065)
A month before the personal deadline — and the penalties run per owner, per month. Extensions are free if filed on time. remind me →
A month before the personal deadline — and the penalties run per owner, per month. Extensions are free if filed on time. remind me →
april 15
Personal returns & Q1 estimates
Federal and Colorado individual returns, plus the first quarterly payment for the current year. The big one. remind me →
Federal and Colorado individual returns, plus the first quarterly payment for the current year. The big one. remind me →
june 15
Q2 estimated taxes
The quarter everyone forgets — it's only two months after Q1. remind me →
The quarter everyone forgets — it's only two months after Q1. remind me →
september 15
Q3 estimates + extended business returns
Extended S-corps and partnerships are due, alongside Q3 estimates. remind me →
Extended S-corps and partnerships are due, alongside Q3 estimates. remind me →
october 15
Extended personal returns
The true final deadline for individuals on extension. Nothing extends past this. remind me →
The true final deadline for individuals on extension. Nothing extends past this. remind me →
or never think about this page again.
Our tax clients don't track deadlines — we do. Quarterly estimate reminders, extension filings when life happens, and business filings calendared from day one. The penalty for a forgotten S-corp deadline costs more than a year of our help.
put us on deadline duty →