Here’s what HIVE AI had to say about “How do partnerships and S corporations report for 2026?”:
Core reporting for partnerships (Form 1065) and S corporations (Form 1120-S) for 2026
- Partnerships generally report annually on Form 1065 and issue Schedule K-1s to partners (and, if applicable, Schedules K-2/K-3 for international items). The partnership return due date is generally the 15th day of the 3rd month after the tax year ends (for a calendar-year partnership, March 15). 3
- S corporations generally report annually on Form 1120-S and issue Schedule K-1s to shareholders. The S corporation return due date is generally the 15th day of the 3rd month after the tax year ends. 4
- K-1 (and, if applicable, K-3) timing: partnerships generally must provide partners their Schedule K-1 (and, if applicable, Schedule K-3) by the 15th day of the 3rd month after the partnership tax year ends. 5
What “for 2026” means in practice (dates)
- If you mean tax year 2026 (calendar year ending 12/31/2026), the due date is March 15, 2027 for partnerships and March 15, 2027 for S corporations (subject to weekend/holiday rules shifting the due date). 3 4
- If you mean filing season during calendar year 2026 (returns filed for tax year 2025), IRS instructions note the calendar-year 2025 due date shifted to March 16, 2026 for both Form 1065 and Form 1120-S because March 15, 2026 is a Sunday. 3 4
Special situation: section 444 fiscal year election and Form 8752
- Partnerships and S corporations that have a section 444 election in effect generally must file Form 8752 each year to figure/report the required section 7519 payment (or claim a refund of net prior-year payments). 1
Tax year conformity (common issue in tiered structures)
- Partnerships and S corporations generally must use a required tax year unless they qualify for IRS approval of another year or make a section 444 election (which can trigger Form 8752/section 7519 payments). 2
Sources
1 – IRS – Instruction 8752 Instructions for Form 8752, Required Payment or Refund Under Section 7519
2 – IRS – Publication 538 Accounting Periods and Methods
3 – Instructions for Form 1065 (2025)
4 – Instructions for Form 1120-S (2025)
5 – Publication 509 (2026), Tax Calendars
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