What is the QOF deferral length for opportunity zone investments made in 2026 versus 2027?

Money invested by December 31, 2026 is deferred only until that same date

The version of section 1400Z-2(b)(1) that governs investments made on or before December 31, 2026 includes the deferred gain in the taxable year that contains the earlier of the date the investment is sold or exchanged and December 31, 2026. For a calendar-year individual that is the 2026 return, due in April 2027.

Section 4.01 of Notice 2026-40 restates the rule and adds that an investor still holding on that date cannot defer the deemed included gain again. The election stays in effect, which keeps the ten-year election alive for the fund's own appreciation, but the original gain is taxed.

So a 2026 gain invested in 2026 gets no deferral past the year it was realized. A 2025 gain invested inside its window in early 2026 moves only from the 2025 return to the 2026 return, and an investment made in 2026 cannot reach the five-year mark before the inclusion date, so it earns no basis increase.

Money invested after 2026 gets a five-year clock that starts on your own investment date

Public Law 119-21 rewrote section 1400Z-2(b) for amounts invested after December 31, 2026. The deferred gain is included in the year that contains the earlier of the sale or exchange of the investment or the date five years after the investment was made.

Section 4.02 of the notice adds a third trigger: an inclusion event other than a sale, such as a gift or a distribution in excess of basis, also ends the deferral.

If you hold for the full five years, basis rises by 10% of the deferred gain, or 30% for a qualified rural opportunity fund, and the statute treats that increase as occurring before the inclusion date. The tax at year five is therefore on 90% or 70% of the gain, assuming the investment is still worth at least the gain. The rural fund definition is covered in qualified rural opportunity funds.

A gain from the second half of 2026 can reach the new rules by waiting for January

Section 4.02(2) of Notice 2026-40 says a taxpayer with eligible gain realized 'on, before, or after December 31, 2026, who timely invests a corresponding amount in a QOF on or after January 1, 2027' may elect deferral under the new rules. Timeliness is the 180-day period in Reg. Section 1.1400Z2(a)-1(b)(7), which begins on the day the gain would be recognized.

Counting the sale date as day one, a sale on or after about July 6, 2026 has a window that reaches January 1, 2027. Have your CPA confirm the exact last day for your gain, because partnership, installment and capital gain dividend gains can start their windows on different dates under the regulation.

Waiting has a cost. If the window closes before a suitable fund accepts your money, the gain is simply taxed for 2026. Funds also face new location rules for property bought after 2026, described in the 2027 zone designations.

A hypothetical $500,000 gain shows the two timelines side by side

Assume a hypothetical long-term gain of $500,000 on a sale closed September 1, 2026, with the 180-day window running into late February 2027.

Invest in October 2026, and the full $500,000 is included on the 2026 return, exactly as if no fund had been bought. The only remaining benefit is the ten-year election on any growth in the fund.

Invest on January 15, 2027, and the inclusion moves to the tax year containing January 15, 2032. If the investment is held and worth at least $500,000 then, basis is $50,000 and $450,000 is included; in a qualified rural fund basis is $150,000 and $350,000 is included. Hold to January 2037 and elect, and the fund's appreciation is excluded.

These figures are hypothetical and ignore rates, state tax and fund performance; run your own numbers with your CPA.

What to settle before December 31, 2026

Confirm your window, then confirm a fund that can accept a January subscription. A gain that would sit idle for a few months is often worth more under the new schedule than under the old one, but only if the investment actually closes in time.

Plan for the cash at year five. The included gain is taxed even though the fund has paid nothing out, and the rolling five-year deferral explains what the inclusion year looks like. Check your state too, because some states never deferred the gain at all; see whether your state recognizes the deferral.

If the gain came from investment real estate and you would rather keep the whole equity in property, a 1031 exchange into a Delaware Statutory Trust has no calendar cliff. Running both at once is allowed when the exchange leaves cash boot.