Startup Tax Calendar (with IRS Deadlines for C-Corps)

Описание: Startup tax calendar with IRS deadlines for C-Corps. Includes Form 1120, Franchise Tax, 5472, estimated payments, and compliance tips.

Startup Tax Calendar (with IRS Deadlines for C-Corps)

📅 2025 Startup Tax Calendar Overview

Here’s the full IRS and Delaware tax calendar for calendar-year C-Corps (Jan 1–Dec 31):

Tax Calendar for startups 

❗Why Startups Can’t Ignore These Deadlines

Even if you’re:

• Pre-revenue

• Funded by SAFE or equity rounds

• A solo founder

You still face filing and compliance deadlines. Missing just one can lead to:

• IRS late penalties

• Loss of Delaware good standing

• Delays in fundraising or exits

💡 Want Reminders?

TaxHero AI helps you:

• Track your startup’s exact tax deadlines

• File the right forms (Form 1120, Franchise Tax, etc.)

• Avoid penalties or compliance gaps

🔗 Try it free at https://taxhero.vc/checkin

🔁 How This Calendar Connects to Other Startup Tax Obligations

• Form 1120 Guide: Your C-Corp tax return (due April 15)

• Form 5472 for Foreign Founders: Mandatory for foreign-owned startups

• Franchise Tax Guide: Due March 1, even for $0 revenue

• Startup Tax Deductions: Lower your tax bill legally

• Form 7004 Extension Filing: Use this if you're running late

🔍 FAQ Section

❓What if I incorporated in late 2024?

You may still owe 2024 tax filings (even with $0 activity). Talk to a startup tax advisor or use TaxHero AI to auto-detect your obligations.

❓What if I use a fiscal year instead of calendar year?

Your Form 1120 deadline is the 15th day of the 4th month after your fiscal year-end. This calendar assumes a standard Jan 1 – Dec 31 fiscal year.

❓Is the 83(b) election on this calendar?

It should be tracked internally. It’s due 30 days from your equity grant, not on a fixed date. Learn more here → 83(b) Election Guide

✅ TL;DR

This calendar is your startup's IRS and Delaware compliance roadmap. Stay ahead. File early. Avoid surprises.