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Key Tax Deadlines for Founders, Wealth Managers, Individual and Angel Investors in 2025

Staying ahead of tax deadlines is critical for private market participants to avoid penalties, optimize returns, and maintain compliance. Below, we’ve outlined key deadlines relevant to founders, investors, wealth managers, and fund managers, along with tips to stay organized and common pitfalls to avoid. As always and above all, consult with your tax professional and Certified Public Accountant to ensure you are meeting requirements for your specific circumstances!

Individual Investors

Deadlines

  • January 15, 2025: Final estimated tax payment for the 2024 tax year.
  • April 15, 2025: File taxes, report capital gains or losses, and include K-1 forms from partnerships or funds.
  • June 15, 2025: Q2 estimated tax payment due (if required).
  • September 15, 2025: Q3 estimated tax payment due.
  • October 15, 2025: Deadline for filing amended returns.
  • December 31, 2025: Final day for tax-loss harvesting to offset gains.

Considerations

  • Maintain detailed records of capital gains, losses, and K-1 forms for smoother tax preparation.
  • Regularly review your portfolio for tax-saving opportunities, such as tax-loss harvesting, before December 31.
  • Monitor and plan estimated tax payments throughout the year to avoid underpayment penalties.

Fund Managers

Deadlines

  • March 15, 2025: Distribute K-1 forms to investors.
  • April 15, 2025: File fund-level partnership tax returns.
  • December 31, 2025: Finalize fund-level tax obligations, including any end-of-year distributions.

Considerations

  • Ensure timely and accurate K-1 distribution to investors.
  • Engage a tax advisor with expertise in fund-level compliance to manage complex obligations.
  • Use fund management software to track transactions and prepare reports.
  • Allocate sufficient time and resources to ensure all taxable events are reported accurately, avoiding IRS scrutiny.

Wealth Managers

Deadlines

  • March 15, 2025: File partnership returns (Form 1065) and distribute K-1 forms to clients.
  • April 15, 2025: File client reports for taxable events.
  • September 15, 2025: Extended deadline for partnership filings.

Considerations

  • Maintain a robust system for tracking client taxable events to ensure all transactions are captured.
  • Communicate proactively with clients about their tax obligations and required documentation.
  • Missing deadlines or underreporting taxable events can result in penalties; ensure all filings are accurate and on time.

Founders

Deadlines

  • January 15, 2025: Estimated quarterly tax payment (if applicable).
  • January 31, 2025: Deadline to provide Form W-2 to employees and Form 1099-NEC to non-employees.
  • February 28, 2025: Deadline to file Form 3921 (by mail) for incentive stock option exercises.
  • March 17, 2025: File Form 1120-S for S-Corporations or request an extension. Provide Schedule K-1s to shareholders.
  • March 31, 2025: Deadline to file Form 3921 electronically.
  • April 15, 2025: File personal taxes and report equity compensation.
  • October 15, 2025: Final deadline for extended filings.

Considerations

  • File Form 83(b) election within 30 days of receiving equity to maximize tax benefits.
  • Use a payroll system to automate W-2 and 1099 issuance and avoid penalties for late reporting.
  • Work with a tax advisor experienced in startup equity structures to ensure proper reporting of stock options and other equity compensation.
  • Missing deadlines for employee and contractor reporting or 83(b) elections can lead to higher tax liabilities and penalties.

Angel Investors

Deadlines

  • April 15, 2025: File personal taxes, including claiming QSBS (Qualified Small Business Stock) benefits if applicable.
  • October 15, 2025: Deadline for filing amended returns.

Considerations

  • Keep detailed records of investments qualifying for QSBS benefits to ensure eligibility and optimize capital gains exemptions.
  • Work with a tax advisor to accurately report all investment transactions and avoid underreporting capital gains.
  • Failing to claim QSBS benefits or providing insufficient documentation can result in missed tax-saving opportunities.

This guide is designed to provide a quick reference to key tax obligations for private market participants. For additional guidance, visit the IRS website or consult with a tax professional.

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