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Flourish Management Monthly Partner Letter · Investment Committee Directive
Venture Capital · Dec 2026 · 4 Min Read

Year-End Angel Portfolio Audit: Turning Startup Losses into Tax Offsets

If a startup in your portfolio is failing, waiting until January to take the write-off costs you an entire year of tax savings.

If you back early-stage founders, startup mortality is part of the game. But what separates novice angels from disciplined family offices is how they handle the failures.

A founder might email investors in November saying: 'We have two weeks of runway left and are shutting down operations.'

Novice angels sigh, close the email, and wait until their accountant asks for K-1s in April. That is a costly mistake.

If you don't obtain a formal corporate dissolution certificate or insolvency letter before December 31, the IRS may disqualify your deduction for the current tax year. You will have to wait twelve months to claim your tax loss.

The December Angel Playbook

  • Request Written Insolvency Letters: Contact struggling founders by December 10 and obtain a signed officer certification of corporate cessation.
  • Claim Section 1244 Ordinary Losses: Deduct up to $100,000 of qualifying startup losses directly against high ordinary salary or business income.
  • Track 5-Year QSBS Clocks: For winning startups, verify that stock certificates are securely archived to prepare for 100% federal capital gains tax exclusion under Section 1202.

Taxes are a direct deduction from your net investment returns. Run a tight year-end audit, and turn startup losses into immediate cash back in your pocket.

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Flourish Execution Standard · Principal Portfolio Implementation

How Flourish Adopts This Best Practice

Flourish coordinates formal year-end dissolution audits with portfolio company leadership, ensuring allocators obtain verified tax deduction documentation before the tax year closes.

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Flourish Investment Committee

General Partner Desk · Flourish Management LLC

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