Paying capital gains tax now settles the bill in the year of the sale. Investing the gain in a Qualified Opportunity Fund under the OZ 2.0 rules, as of October 2026, moves that bill up to 5 years out, shrinks it by 10 percent (30 percent in a rural fund) if you hold 5 years, and can remove tax on later growth if you hold 10 years. Whether that is worth giving up liquidity and choice is a question this page does not answer; it shows the mechanics.
OZ 2.0 here means a QOF investment made after December 31, 2026. OZ 1.0 means one made through that date.
The mechanics, year by year
| When | Pay the tax now | Invest the gain in a QOF (OZ 2.0) |
|---|---|---|
| Year of sale | Gain taxed on that year's return | Invest the gain within 180 days and elect deferral on Form 8949 (code Z); basis in the investment starts at zero |
| Years 1–4 | After-tax money invested however you choose | Deferral continues unless you sell or have another inclusion event; Form 8997 filed each year |
| Year 5 | Nothing new | Basis rises by 10 percent of the deferred gain (30 percent in a Qualified Rural Opportunity Fund), then the remaining deferred gain is included: the smaller of the gain or fair market value, minus basis |
| Years 5–10 | Growth taxed when realized | Holding continues; no further step-up |
| Year 10 or later | Growth taxed when sold | Elect basis equal to fair market value at sale, so appreciation is not taxed, if sold before the 30th anniversary; after that, basis is fixed at the 30th-anniversary value |
Worked example
Hypothetical example
Assumptions, all illustrative: an investor realizes a $500,000 eligible long-term capital gain on February 1, 2027. A flat combined tax rate of 20 percent applies in every year (actual rates depend on the taxpayer and may change). On either path the money invested grows 60 percent over 10 years. The fund is not a rural fund. State tax is ignored.
Pay now. Tax of $100,000 is due on the 2027 return. The investor invests the remaining $400,000, which grows to $640,000 by 2037. Selling then realizes $240,000 of gain, taxed $48,000. Total tax: $148,000. After-tax value: $592,000.
OZ 2.0. The investor invests $500,000 in a QOF on March 1, 2027. On March 1, 2032 the basis rises by $50,000 (10 percent of $500,000), and $450,000 of gain is included on the 2032 return, assuming the interest is worth at least $500,000 then. Tax: $90,000, paid from other funds, since the fund need not distribute cash. The interest grows to $800,000, and the investor sells in 2037 after more than 10 years and elects fair market value basis, so the $300,000 of growth is not taxed. Total tax: $90,000. Value: $800,000, less the $90,000 paid in 2032, or $710,000.
The difference here comes from three things: $50,000 less gain taxed, tax paid 5 years later, and tax-free growth on the full pre-tax $500,000 rather than on $400,000. Change any assumption and the result changes.
A downloadable Excel model is on the /data/ page, for running the same comparison with your own assumptions.
Where the comparison breaks down
- The investments are not the same. The example assumes equal growth. A QOF is a specific project or set of projects in designated zones; a pay-now investor can choose anything. The return assumption is the largest driver, and this site makes none.
- Loss. If the fund interest is worth less than the deferred gain at year 5, the amount included is capped at fair market value minus basis. In the example, if the interest were worth $300,000, the included amount would be $300,000 minus $50,000, or $250,000. The investor still lost money on the investment.
- Cash at year 5. The year-5 tax is owed whether or not the fund distributes anything.
- Early exits. Selling before 5 years includes the gain then, with no step-up; selling before 10 years gives up the exclusion. Other inclusion events, such as gifts, also end the deferral early.
- Rate changes. The example holds the tax rate constant. Deferral moves the tax into a future year at whatever rate applies then.
- The 30-year cap. Appreciation after the 30th anniversary is not excluded. Notice 2026-55 asks how the 10-year election should work for investments still held then; the rules may be refined.
The 2026 case is different
An investment made on or before December 31, 2026 is OZ 1.0. Its deferred gain is included no later than the tax year that includes December 31, 2026. Under the old rules, step-ups required 5 or 7 years of holding by then, which a 2026 investment cannot reach. So a gain invested in a QOF in late 2026 is deferred, at most, to the 2026 tax year, the same year many 2026 gains would be taxed anyway.
Notice 2026-40 says eligible gain invested on or after January 1, 2027, within its 180-day window, gets OZ 2.0 treatment, even if realized in 2026. Whether a particular gain's window reaches 2027 is a date calculation; see the 180-day deadline calculator and invest in 2026 or wait for 2027.
Gain recognized on December 31, 2026 because an OZ 1.0 investment was still held cannot be reinvested in another QOF. For holders, the choice described on this page does not exist for that gain.
Investing part of a gain
An investor may defer part of a gain and pay tax on the rest. The undeferred remainder stays eligible for a later election within its window. Cash that is not eligible gain, put in the same fund, is a separate non-qualifying investment under the mixed-funds rule and gets none of the benefits.
Questions for a tax adviser
- What rate applies to this gain, federal and state, now and plausibly in year 5?
- Will I have cash to pay the year-5 tax without selling the investment?
- Is my holding period realistic at 5 and 10 years, given the fund's plan?
- Is any of my gain depreciation recapture or other gain that is not eligible?
Janover Capital LLC publishes this reference and arranges commercial loans. It is not a broker-dealer, investment adviser or tax preparer and does not offer, sell or recommend any fund. Sign up for alerts to get notice of new OZ guidance.
Common questions
Is it better to invest in an Opportunity Zone or just pay the capital gains tax?
This site does not answer that for any reader. Mechanically, an OZ 2.0 investment delays the tax on the gain for up to 5 years, reduces the taxed amount by 10 percent (30 percent in a rural fund) if held 5 years, and can exclude later appreciation if held 10 years. Paying now keeps the money liquid and the investment choice open. The trade-off depends on the fund, the holding period and your tax situation.
When do I pay the tax on gain invested in an OZ 2.0 fund?
In the tax year that includes the earlier of the date you sell the investment or the date 5 years after you made it. The amount included is the smaller of the deferred gain or the investment's fair market value on that date, minus your basis, which includes any 5-year step-up.
What if the Opportunity Zone investment loses value?
The amount included at year 5 is capped by the investment's fair market value then, minus basis. If the fund interest is worth less than the deferred gain, less gain is included. The investment itself can still lose money, as any investment can.
Do I have to invest all of my sale proceeds?
No. Only the gain needs to be invested to defer it, and you may defer part of a gain. The rest of the proceeds, your return of basis, is not part of the deferral. Other cash put in the same fund is a separate, non-qualifying investment.
What happens if I invest a gain in an Opportunity Zone fund in 2026?
An investment made on or before December 31, 2026 is under the old rules, and its deferred gain is included no later than the tax year that includes December 31, 2026. A new 2026 investment cannot reach a 5-year holding period by then, so no step-up applies to it. Gain invested on or after January 1, 2027 within its 180-day window gets OZ 2.0 treatment.