The 180-Day Rule

What Is the OZ 180-Day Rule?

The 180-day rule requires investors to reinvest eligible capital gains into a Qualified Opportunity Fund within 180 days of the gain recognition date. The clock start date varies depending on how the gain was earned — and choosing the right start date can determine whether an investor qualifies for OZ 1.0 or the significantly more favorable OZ 2.0.

Why This Rule Causes the Most Lost Opportunities

Most investors who miss the OZ window do not miss it because they were too late. They miss it because they assumed the clock started when it did not, or because they did not know about the elections available to K-1 investors. The deadline is strict. There are no extensions.

Rule 1: Direct Individual Gains (Stock, Real Estate, Crypto)

For gains from direct asset sales, the 180-day clock starts on the exact date of the transaction.

• Sell stock on March 1, 2026: QOF must be funded by August 28, 2026
• Sell real estate on September 15, 2026: QOF must be funded by March 14, 2027 — which means this investor can access OZ 2.0

The July 6, 2026 Date

For investors with direct capital gains:

• Gain realized before July 6, 2026: The 180-day window closes before January 1, 2027. OZ 1.0 only.
• Gain realized on or after July 6, 2026: The 180-day window extends to January 2027 or later. The investor can choose to fund the QOF under OZ 2.0 and receive the rolling five-year deferral and 10% basis step-up — versus the zero step-up available under OZ 1.0.

Rule 2: Cryptocurrency

Crypto gains follow the direct sale rule — the clock starts on the exact transaction date for each individual lot sold. This is critical for investors with multiple positions:

• Ten different crypto transactions create ten different 180-day deadlines
• Each lot must be tracked separately
• There is no flexibility to elect a later start date, unlike K-1 gains
• Investors with many crypto transactions should build a tracking spreadsheet before making any QOF investment

Rule 3: Partnership K-1 Gains

This is where the most planning flexibility exists — and where most advisors miss the opportunity.

For gains reported on a Schedule K-1, the investor may elect to start the 180-day clock on any of three dates:

1. The actual transaction date (when the underlying asset was sold)
2. December 31 of the tax year in which the gain occurred
3. March 15 of the following year (the original K-1 filing deadline)

The OZ 2.0 Bridge Strategy

An investor who receives a K-1 gain from a 2026 partnership sale can elect to start their 180-day clock on March 15, 2027. That means their QOF investment deadline is September 11, 2027 — well into OZ 2.0 territory.

By funding the QOF on or after January 1, 2027, this investor captures:

• The rolling five-year deferral (instead of the December 31, 2026 OZ 1.0 deadline)
• The 10% basis step-up (instead of zero)
• Potential QROF access for the 30% step-up if investing in a rural zone

For most K-1 investors with 2026 gains, it almost always makes mathematical sense to delay funding the QOF until January 1, 2027.

Practical Checklist

Before making any QOF investment, verify:

• What type of gain is this? (Direct sale, K-1 partnership, crypto)
• What is the exact gain recognition date?
• What start date election, if any, is available?
• What is the latest possible funding date that still preserves QOF eligibility?
• Does the latest possible funding date fall before or after January 1, 2027?
• If after January 1, 2027 — is OZ 2.0 the better choice?

What to Read Next

• OZ Deadline Calculator

Frequently Asked Questions

What happens if I miss the 180-day deadline? The gain is no longer eligible for OZ treatment. There are no exceptions and no extensions. The deadline is statutory.

Can I invest a partial gain and keep some for other uses? Yes. You can invest any portion of the eligible gain into a QOF. You only receive OZ benefits on the amount invested.

Does the 180-day rule apply to QOZ funds raising capital from multiple investors? Each investor's 180-day clock is individual. The fund must be able to document each investor's gain date and investment date separately.

Can a trust or entity invest in an OZ fund? Yes, but the rules around how the gain flows through and when the clock starts can be complex. Trusts, estates, S-corps, and C-corps all have specific rule sets. Consult an OZ tax attorney.