Quick answer
For a calendar-year S corporation election intended to start January 1, 2026, the ordinary Form 2553 timing rule points to the 2-month-and-15-day window in the IRS instructions, with weekend or holiday treatment controlled by IRS rules. Treat the exact filing date as an IRS-source check, not a Tax Paperwork calculation.
Source and advice boundary
This page is education-only and not tax, legal, accounting, filing, payment, mailing, faxing, upload, confirmation, or representation advice. IRS.gov and current official instructions control Form 2553 mechanics.
What to check next
Open the current IRS Form 2553 instructions, verify the effective date, tax year, shareholder consent, mailing or fax mechanics, and any weekend or holiday rollover before sending anything.
Tax Paperwork can help organize public-preview draft context for some narrow workflows, but the user remains responsible for official-source review, professional advice when needed, and customer-controlled submission records.
Common risk
The common mistake is treating a draft, checklist, payment receipt, upload receipt, mailing receipt, or third-party summary as IRS confirmation. Keep records, but verify official channel rules and follow-up through IRS.gov, official correspondence, or qualified professional help.
Official source starting points
Last updated June 24, 2026.