Opportunity Zone Tax Deferral Calculator 2026
Calculate your deferred capital gains tax, basis step-up, and new gain exclusion from a Qualified Opportunity Fund investment under IRC §1400Z-2.
How Opportunity Zone Tax Deferral Works
Qualified Opportunity Zones (QOZs) are census tracts designated by states and certified by the U.S. Treasury under IRC §1400Z-1 and §1400Z-2. Investors who realize capital gains can defer federal tax on those gains by reinvesting them into a Qualified Opportunity Fund (QOF) within 180 days of the gain event. The deferred gain is recognized on December 31, 2026 (the final statutory deadline) or on the date the QOF investment is sold, whichever comes first. Source: IRC §1400Z-2, IRS Notice 2019-42. Last updated: May 2026.
The most powerful OZ benefit is the 10-year exclusion: if you hold the QOF investment for at least 10 years before selling, all appreciation in the QOF is permanently excluded from federal capital gains tax under IRC §1400Z-2(c). This means only the original deferred gain (recognized in 2026) is taxed — any growth inside the fund is completely tax-free at the federal level.
OZ Benefits by Holding Period
| Holding Period | Deferral | Basis Step-Up | New Gains Tax |
|---|---|---|---|
| Less than 5 years | Yes (until 2026) | $0 | Full rate |
| 5 years (pre-2022 only) | Yes | 10% of original gain | Full rate |
| 7 years (pre-2022 only) | Yes | 15% of original gain | Full rate |
| 10 years | Yes | $0 (step-ups expired) | $0 — fully excluded |
Key 2026 OZ Deadlines and Rules
The original deferred gain recognition deadline is December 31, 2026. For new investments made in 2026, no 5-year or 7-year basis step-up is available because the fund cannot reach those holding periods before the 2026 recognition deadline. The primary benefit for new 2026 investors is (a) deferring the original gain until the 2026 tax payment date and (b) positioning for the 10-year new-gains exclusion on QOF appreciation. You must still pay tax on the original gain in April 2027 (for tax year 2026). The QOF must hold at least 90% of its assets in Qualified Opportunity Zone Property, tested on two semi-annual testing dates per year (IRS Form 8996). Always consult a qualified tax attorney before making OZ investments — penalties for non-compliance are significant.