Multiply your potential, exponentially.
If you are switching to an S-corp, the deadline is not flexible. The IRS rule is simple: file Form 2553 no later than 2 months and 15 days after the start of the tax year the election will take effect, or any time in the tax year before that year begins. (https://www.irs.gov/instructions/i2553)
Last reviewed: January 21, 2026.
If you are even a week late, the fix is paperwork, not hope.
For a calendar-year business (tax year starts January 1), the 2 months and 15 days rule usually lands on March 15. (https://www.irs.gov/instructions/i2553)
If you are making the election effective for a future year, you can file any time in the tax year before that year starts. (https://www.irs.gov/instructions/i2553)
The IRS provides a relief process for late S-corp elections in specific situations. The instructions for Form 2553 outline how to request relief and which statement to include. (https://www.irs.gov/instructions/i2553)
The S-corp election deadline is separate from the S-corp tax return deadline. Form 1120-S is generally due the 15th day of the 3rd month after the end of the tax year. (https://www.irs.gov/instructions/i1120s)
Confirm the effective date you want, then have your CPA prepare and file Form 2553 with the shareholder signatures in place.
This guide is for planning and coordination only. It does not provide tax or legal advice. Confirm eligibility and deadlines with a qualified professional.
