Practical templates
Download the 2027 IRS tax planning calendar
Keep a dated reference for the main federal filing and estimated-payment events. The PDF is designed for reading and printing; the ICS file adds all-day planning events to your calendar. The two files share the same planning assumptions and source date.
The short answer
This is a TAXFINAI planning resource, not an IRS-issued calendar. At the October 10, 2026 source check, Publication 509 for 2027 is available as a draft. The resource therefore uses the general published rules and identifies its prospective status. Before relying on a date, check the final instructions and any taxpayer-specific relief.
A preview of the main planning dates
| Date | Event to examine |
|---|---|
| March 15, 2027 | 2026 calendar-year Forms 1065 and 1120-S |
| April 15, 2027 | 2026 calendar-year individual and corporate returns; individual 2027 first installment |
| June 15, 2027 | Individual 2027 second installment |
| September 15, 2027 | Individual 2027 third installment; eligible business extensions |
| October 15, 2027 | Eligible individual and C corporation filing extensions |
Scroll the table if needed.
What the two files are for
The PDF organizes the main dates and distinguishes filing, extensions and payments. It includes the source date and the assumptions behind the planning list. The ICS expresses dates as all-day events with a description so a calendar user can see what the event concerns.
A shared planning calendar is a starting point. It does not identify every client’s tax year, state footprint, disaster relief or special status. Add a dossier owner and the evidence for the applicable date in your firm’s own work record. Filing an extension does not automatically extend payment.
Import into a separate calendar
If you import a later revision, remove or reconcile the old events to avoid duplicates. Any notification you enable belongs to your calendar application. Keep personal client information out of a shared planning event.
Download the ICS
Choose the English file and save it on your device.
Import the file
In your calendar application, use its import-file command and select the ICS. A separate calendar makes the imported events easier to identify.
Check before using
Review the event year, all-day dates and descriptions. A downloaded file is a snapshot: importing it does not subscribe you to future corrections.
Connect the date with the actual work
Read the tax-calendar guide for the distinction between nominal rules, adjusted dates and exceptions. Tax Workflow organizes a return’s status, documents, responsible people and due date; the template remains an independent reference that you can use with your current process.
The download is available directly. If you want to discuss your team’s tax-season organization, the contact and WhatsApp options provide a separate next step. No contact request is needed merely to read the files.
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2027 tax planning calendar
A dated PDF reference and an all-day ICS planning file in the page’s language. Prospective edition; verify applicability before use.
Common questions
Is this the final official IRS 2027 calendar?
No. It is a TAXFINAI planning resource. The 2027 Publication 509 consulted on October 10, 2026 is a draft; final instructions and relief notices must still be checked.
Does the calendar cover every state deadline?
No. It focuses on federal planning dates. Add the state and local obligations applicable to each taxpayer using the relevant authority’s current information.
Does importing the ICS subscribe me to updates?
No. It imports a snapshot. Review later versions and replace or reconcile old events when you import a revised file.
Sources for further reading
Dated source checks do not replace review by the professional responsible for your engagement.
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