A key Opportunity Zone tax date arrives on December 31, 2026. Here’s how you can avoid overpaying.

Opportunity Zone (OZ) investing is built for long-term thinking. But for many investors and, one date is now very near-term: December 31, 2026.

If you deferred capital gains into a Qualified Opportunity Fund (QOF) before January 1, 2027, and you still hold that investment, current Opportunity Zone rules generally require that the original deferred gain be brought back into taxable status on December 31, 2026 — if it has not already been recognized through a different inclusion event.

The good news is that OZ tax rules don’t ignore economics. The value of your QOF matters, and obtaining credible, fair market valuations can help ensure you are not paying tax on a gain amount that no longer reflects the actual value of your OZ investment.

Keep reading to learn more.

For many investors, deferred Opportunity Zone gains come back into income on December 31, 2026

When you elect an OZ deferral, you are not eliminating the original capital gain but merely deferring it. Under current law, that deferral period ends at the earlier of either:

• A triggering event like a sale, distribution in excess of basis, etc., or
• December 31, 2026

In practice, this means many investors will report an OZ-related gain inclusion on their 2026 returns.

The value of your QOF investment determines your tax bill

The December 31, 2026, inclusion is not always just equal to the gain you originally deferred. Instead, the inclusion calculation is designed to reflect a simple, investor-friendly concept: You generally recognize the lesser of your remaining deferred gain or excess of amount realized over adjusted basis in the QOF interest. For a flow-through entity the calculation is a little more specific and it is based on the gain the partner would recognize if the QOF partnership interest were sold in a fully taxable transaction for FMV.

In practical terms, this means that if your investment has declined in value, you may be able to cap the amount of gain you must recognize when the deferral period ends by calculating a properly supported fair market value.

What does a fair market value calculation for your QOF look like?

Here’s an example of a fair market value calculation for a QOF. Consider an investor who recognized a gain in 2022 and decided to defer that into a QOF.

• On January 5, 2022, the investor defers $100,000 of eligible capital gain by investing it into a QOF partnership.
• Over the 2022–2026 period, the investment has not risen to the level of previously predicted stabilization due to higher interest rates, slower leasing and insurance. Over this time period, the investor is allocated $20,000 of losses, supported by partnership debt allocations.
• As of December 31, 2026, an independent valuation concludes that the investor’s partnership interest is worth $70,000.

Under current rules, the investor generally must include deferred gain in the 2026 tax year. But the inclusion is designed to take into account the investment’s fair market value on the recognition date as well.

At a high level:

• The investor is not automatically taxed on the original $100,000 if the investment is worth less on December 31, 2026.
• The $70,000 valuation may support a lower 2026 inclusion amount, but the final amount should be determined by analyzing the investors' outside basis, debt allocations, loss allocations and the gain that would result from a deemed taxable sale of the QOF partnership interest at fair market value.

Expect the IRS to test your fair market value calculation

The IRS has clear authority to challenge transactions or positions that are inconsistent with the purpose of the Opportunity Zone regime. This makes establishing an accurate valuation important.

If you claim a lower fair market value at the time of recognition, be aware that you may need to defend that position with evidence.

What should you do to prepare for the December 31 Opportunity Zone tax deadline?

December 31, 2026, is close enough that “we’ll handle it next year” is rarely a good strategy. For investors, the right playbook is disciplined and proactive:

• Address your Opportunity Zone positions. Identify which QOF investments were funded with deferred gains and confirm whether any inclusion events could occur before year-end 2026.
• Model your 2026 inclusion exposure. Determine how much will be owed for the inclusion event.
• Coordinate your tax and valuation workstreams. Partnership allocations, debt, and basis tracking can materially affect the analysis — align your tax advisors, fund sponsor reporting and valuation team early.
• Build a realistic valuation timeline. Independent valuations take time — particularly if the underlying assets are complex, levered or in transition. Start early enough to avoid rushed decisions late in 2026.

How Wipfli can help

We advise real estate investors on how to make Opportunity Zones a powerful tax advantage. Let’s talk about your potential exposure on December 31, 2026, and how we can help you strengthen your tax position. Start a conversation.

Let’s talk OZ tax strategy

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