Qualified Rural Opportunity Funds and the 30% Basis Step-Up: How the Rural Opportunity Zone Provisions Work

Updated August 2026 • Educational resource from Urban Catalyst

Urban Catalyst and its affiliates do not provide tax, legal, or financial advice. The information below is general and educational in nature. This article discusses federal income tax treatment. State and local tax treatment may differ materially. For example, California does not currently conform to the federal Opportunity Zone gain-deferral and exclusion provisions, so a California taxpayer may recognize gain for California purposes even where federal treatment is deferred or potentially excluded. Every investor’s situation is different. Please consult your own tax professional regarding the laws applicable to your residence and circumstances.

Federal legislation enacted July 4, 2025 made the Opportunity Zone program a permanent part of the tax code and revised its terms. For convenience, this article refers to the original program rules as “OZ 1.0” and the amended rules as “OZ 2.0.” These are informal shorthand used by practitioners, not formal IRS designations.

Among the changes that legislation made, two are specific to rural areas. It created an enhanced basis step-up for investments routed through qualified rural opportunity funds, and it separately lowered the substantial improvement threshold for property located in rural zones. The two provisions are frequently discussed together, but they operate at different levels, apply different tests, and took effect at different times.

This guide describes how a qualified rural opportunity fund is defined, how the 30% basis step-up compares with the standard 10%, what the statutory rural area definition covers, how the 50% substantial improvement threshold differs from the step-up, and where the new designation process currently stands.

What Is a Qualified Rural Opportunity Fund?

A qualified rural opportunity fund is a category of Qualified Opportunity Fund created by the 2025 amendments to Section 1400Z-2 of the Internal Revenue Code. The distinguishing feature is where the fund’s assets are located.

Under the general framework, a qualified rural opportunity fund is a fund that holds at least 90% of its assets in qualified opportunity zone property located in qualified opportunity zones comprised entirely of a rural area. A standard Qualified Opportunity Fund is subject to a 90% asset test as well, but without the rural location requirement. The general 90% asset test carries its own mechanics, including semiannual testing dates and related valuation and cure rules. How those mechanics apply to a qualified rural opportunity fund is a question for the fund’s own tax advisers.

Three points are relevant for an investor reading fund materials:

• The test is applied at the fund level, not the project level. A fund holding a mix of rural and non-rural assets would generally need to satisfy the 90% threshold for the fund to be treated as a qualified rural opportunity fund. A fund may hold a mix; whether it qualifies is determined against the threshold, not by the presence of rural assets.
• The zone must be entirely rural. The standard is not whether property sits in a generally rural part of the country, but whether the designated qualified opportunity zone itself is comprised entirely of a rural area as defined below.
• Rural status is a function of the zone, not of how a fund is described. A fund marketed as “rural” is not necessarily a qualified rural opportunity fund for federal tax purposes. The qualifying analysis depends on the designated tracts in which the fund’s property is located, and is a factual and legal determination that should be reviewed against the fund’s offering documents and with the investor’s own tax advisers.

Final rules and guidance implementing these provisions continue to develop, and specific requirements may be clarified or modified.

How the 30% Basis Step-Up Generally Works

Under OZ 2.0, gain invested in a Qualified Opportunity Fund in a qualifying investment made after December 31, 2026 is generally subject to a rolling five-year deferral rather than a fixed recognition date. At the end of that five-year period, a portion of the deferred gain may be excluded from inclusion through a basis step-up.

The size of that step-up is where rural and non-rural funds differ.

The mechanics are otherwise the same. Whether a particular gain is an eligible gain, and when its 180-day period begins and ends, depends on the taxpayer, the entity, the type of gain, and the elections involved, and should be reviewed with a tax advisor. Eligibility for deferral is not automatic.

The program’s separate potential benefit for investments held at least 10 years, a possible exclusion of tax on qualifying post-investment appreciation in the fund investment itself, is potentially available under both standard and rural fund structures. The 10-year holding period is a condition for potential favorable federal tax treatment, not an assurance of any outcome, and the exclusion applies only to qualifying post-investment appreciation and only where the investor, the investment, the fund, the disposition, and the election satisfy the applicable requirements. The original deferred gain generally remains taxable.

Under OZ 2.0, that potential exclusion is generally subject to a limitation measured by reference to the earlier of a qualifying sale or 30 years after the date of the qualifying investment. Under OZ 1.0, current regulations generally preserve the election for qualifying dispositions before January 1, 2048. Our guide How to Potentially Defer Capital Gains Tax With an Opportunity Zone Fund covers the investor-side mechanics of the incentive in more detail.

What Counts as a “Rural Area”?

The definition is statutory and narrower than everyday usage of the word.

Federal legislation enacted July 4, 2025 defines a rural area for this purpose as any area other than a city or town with a population greater than 50,000 inhabitants, and any urbanized area contiguous and adjacent to a city or town with a population greater than 50,000 inhabitants. The definition applies with respect to the states, the District of Columbia, and the U.S. territories.

Two features of the definition are worth understanding:

• It is exclusionary rather than affirmative. Rather than listing qualifying rural characteristics, the rule defines rural as what remains after larger population centers and their adjacent urbanized areas are removed.
• Adjacency matters. An area that is itself sparsely populated may still fall outside the definition if it is an urbanized area contiguous and adjacent to a city or town above the population threshold.

For context on scale, IRS Tax Tip 2026-04, published January 20, 2026, states that 3,309 of the 8,764 zones designated under the original program are comprised entirely of a rural area. Separately, when Treasury opened the new designation cycle on July 1, 2026, it stated that 8,334 of the 25,332 census tracts eligible for nomination were identified as eligible for rural benefits. Whether any particular tract or property falls within the definition is a determination for the fund’s own advisers.

The 50% Substantial Improvement Threshold: A Zone Test, Not a Fund Test

The second rural provision operates independently of the 30% basis step-up, and it is already in effect.

Under the general Opportunity Zone rules, acquiring existing property does not by itself qualify it as qualified opportunity zone business property. Where the property’s original use in the zone does not begin with the fund or business, Section 1400Z-2(d)(2)(D)(ii) generally requires that the property be substantially improved, historically meaning additions to basis during a 30-month period exceeding the property’s adjusted basis at the beginning of that period. In general terms, the improvement spend has to exceed what the building was carried at.

Federal legislation enacted July 4, 2025 amended that requirement to substitute 50% of adjusted basis in the case of property located in a qualified opportunity zone comprised entirely of a rural area. IRS Notice 2025-50, released September 30, 2025, addressed substantial improvement of property in rural areas.

Three distinctions between this provision and the 30% step-up are worth drawing:

• Different effective date. The reduced threshold applies to substantial improvement determinations made on or after July 4, 2025, including for zones designated under the original program. The 30% basis step-up, by contrast, generally applies to qualifying investments made after December 31, 2026.
• Same zone-level standard, but no fund-level test. Both provisions use the same standard for the zone: a qualified opportunity zone comprised entirely of a rural area. The reduced substantial improvement threshold is written to key off the character of the zone in which the property sits, not off the character of the fund holding it, and it contains no 90% asset test. A standard Qualified Opportunity Fund that is not a qualified rural opportunity fund may hold property in an entirely rural zone and that property may still be subject to the 50% threshold. The 30% step-up, by contrast, layers the fund-level 90% asset test on top of the zone standard.
• It bears on project feasibility, not on investor basis. The reduced threshold affects the arithmetic of rehabilitating existing buildings at the project level. It does not change the tax treatment of an investor’s deferred gain.

Where the New Designations Stand

Both provisions ultimately depend on which census tracts are designated, and as of August 2026 that process is underway and not complete.

Treasury opened the new designation cycle on July 1, 2026 and released the list of census tracts eligible for nomination, a subset of which was identified as eligible for rural benefits. Under Rev. Proc. 2026-14, issued April 6, 2026, the nominating jurisdictions (the 50 states, the District of Columbia, and the five territories) have 90 days from the opening of the cycle to submit nominations, with the ability to request a 30-day extension. The general nomination cap is 25% of a jurisdiction’s eligible low-income communities, subject to statutory minimums for smaller jurisdictions: a jurisdiction with 26 to 99 eligible low-income communities may generally nominate up to 25 tracts, and one with 25 or fewer may generally nominate all of them.

Certification follows the nomination period under a statutory consideration window. OZ 2.0 designations are scheduled to take effect January 1, 2027 and to run through December 31, 2036.

As of August 2026, Treasury had not published the certified list of designated zones for the new period, so the final rural and non-rural map for OZ 2.0 is not established. Nothing in this article should be read as a prediction of which tracts will be nominated or certified. Investors reviewing fund materials during this period sometimes note whether a sponsor’s target geography is described in terms of tracts eligible for nomination or tracts actually designated, since the two are not the same.

Questions Investors Sometimes Ask Sponsors

Urban Catalyst does not suggest that any of the following is dispositive, and they do not substitute for reviewing a fund’s offering documents and risk factors with professional advisers. They are examples of diligence questions that touch on the rules above. The rural provisions bear on tax treatment and on project-level feasibility; they do not by themselves address the underlying real estate. Our guide Five Considerations When Reviewing an Opportunity Zone Fund covers the broader review framework.

• How the sponsor separates the tax provision from the investment itself. A basis step-up applies to a deferred gain. The outcome of the investment depends on the assets, the market, and the sponsor’s execution, and is subject to the risk of partial or total loss.
• Market depth and exit assumptions. Smaller markets may have fewer comparable transactions and a narrower set of potential buyers at exit. Opportunity Zone strategies are typically structured around long holds, and sponsors may be asked to explain the assumed disposition path.
• Economic concentration. Some markets depend heavily on a single employer, industry, or institution, and are exposed to regulatory changes, natural disasters, financing conditions, construction costs, and local supply and demand.
• Sponsor experience in the specific market. Entitlement processes, contractor availability, and labor supply differ between markets.
• Fund-level compliance. Qualified rural opportunity fund treatment depends on an ongoing 90% asset test, and a sponsor may be asked how asset testing is monitored, documented, and reported, and what its disclosure says about the consequences of a compliance failure.
• Liquidity, terms, and costs. Opportunity Zone fund investments are generally illiquid and speculative regardless of geography. Offering terms, fees and expenses, conflicts of interest, leverage, and valuation practices are addressed in a fund’s offering documents rather than in an article of this kind.

These are general considerations, not recommendations, and they are illustrative rather than exhaustive. Which factors are relevant depends on the individual investor’s objectives, tax situation, and circumstances, and should be discussed with their own advisers.

Which Rules Apply, and When

Qualifying investments made on or before December 31, 2026 generally remain governed by the original program rules. That includes the OZ 1.0 deemed inclusion event: remaining deferred gain from an existing OZ 1.0 qualifying investment is generally included in income for the taxable year containing December 31, 2026. That rule applies to gain deferred through an existing qualifying investment, not to capital gains generally. We cover it in The December 31, 2026 Opportunity Zone Tax Deadline, and the transition between the two frameworks in IRS Notice 2026-40.

Frequently Asked Questions

What is a qualified rural opportunity fund?

A qualified rural opportunity fund is generally a Qualified Opportunity Fund that holds at least 90% of its assets in qualified opportunity zone property located in qualified opportunity zones comprised entirely of a rural area. The rural location requirement is what distinguishes it from a standard Qualified Opportunity Fund. The test is applied at the fund level, so a fund may hold a mix of rural and non-rural property and its treatment is determined against the 90% threshold. Whether any particular fund qualifies is a factual and legal determination for the fund’s own advisers and should be reviewed against its offering documents.

How much is the rural basis step-up, and what does it apply to?

For qualifying investments made after December 31, 2026, a qualified rural opportunity fund is generally associated with a 30% basis step-up after a five-year holding period, compared with 10% for a standard Qualified Opportunity Fund. The step-up applies to the deferred gain, not to appreciation in the investment, and it reduces rather than eliminates the amount included in income. The original deferred gain generally remains taxable. Eligibility depends on the type of gain, the applicable reinvestment period, the elections made, and other statutory requirements, and is not automatic.

When does the 30% step-up become available?

It generally applies to qualifying investments made after December 31, 2026, when the OZ 2.0 framework takes effect. The separate 50% substantial improvement threshold for property in rural zones applies to determinations made on or after July 4, 2025 and is already in effect.

How is “rural area” defined for Opportunity Zone purposes?

Federal legislation enacted July 4, 2025 defines a rural area for this purpose as any area other than a city or town with a population greater than 50,000 inhabitants, and any urbanized area contiguous and adjacent to a city or town with a population greater than 50,000 inhabitants. The definition is exclusionary, and an area that is itself sparsely populated may fall outside it if it is contiguous and adjacent to a larger population center. Whether a particular tract falls within the definition is a determination for the fund’s own advisers.

Does the potential 10-year tax benefit differ for rural funds?

Generally, no. The potential exclusion of tax on qualifying post-investment appreciation for investments held at least 10 years is potentially available under both standard and rural fund structures. The 10-year holding period is a condition for potential favorable federal tax treatment, not an assurance of any outcome, and the exclusion applies only to qualifying post-investment appreciation and only where the investor, the investment, the fund, the disposition, and the election satisfy the applicable requirements. The original deferred gain generally remains taxable. Under OZ 2.0 the potential exclusion is generally subject to a limitation measured by reference to the earlier of a qualifying sale or 30 years after the date of the qualifying investment; under OZ 1.0, current regulations generally preserve the election for qualifying dispositions before January 1, 2048.

The Bottom Line

The rural provisions under OZ 2.0 are specific, and they are not a single benefit. Both rest on the same zone-level standard, a qualified opportunity zone comprised entirely of a rural area, and diverge from there. The reduced 50% substantial improvement threshold applies to determinations made on or after July 4, 2025, keys off the character of the zone rather than the fund, and bears on project-level feasibility. The 30% basis step-up adds a fund-level 90% asset test, generally applies to qualifying investments made after December 31, 2026, and bears on the treatment of an investor’s deferred gain, which generally remains taxable in part.

For a reader evaluating fund materials during the transition, the distinctions that matter are which test a given provision turns on, when it applies, and whether a sponsor’s target geography is described in terms of tracts eligible for nomination or tracts actually designated. Those are questions for a qualified tax professional and for the sponsor directly, alongside the offering terms, fees, conflicts, risk factors, and exit strategy that any Opportunity Zone investment involves.

About Urban Catalyst

Urban Catalyst is a private equity real estate firm and developer focused on Opportunity Zone investment in downtown San Jose. Urban Catalyst has launched two Opportunity Zone funds and has advanced a portfolio of eight downtown San Jose projects, serving as both fund manager and developer, a structure that involves operational involvement in its projects as well as related-party fees, potential conflicts of interest, concentration of execution responsibilities in one organization, and concentration in a single market. This article does not describe, and is not connected to, any Urban Catalyst offering.

Disclosures: Urban Catalyst and its affiliates do not provide tax, legal, or investment advice. This material is for informational and educational purposes only, is general in nature, and does not consider the specific circumstances of any individual investor. It is neither an offer to sell nor a solicitation of an offer to buy any security, and no offering is being made or identified by this article; any future offering, if made, would be made only through definitive offering documents describing its terms, fees, and risk factors. Nothing in this article should be construed as a recommendation to pursue, defer, or refrain from any investment or tax strategy, as a view on any geography or fund structure, or as an indication that an Opportunity Zone investment is appropriate for any particular reader. Descriptions of statutory and regulatory requirements in this article are simplified summaries current as of August 2026, omit numerous rules, exceptions, definitions, and elections, and may not reflect subsequent legislation, regulations, guidance, or judicial decisions. Opportunity Zones 2.0 provisions remain subject to final rules, regulations, and guidance, which may clarify or modify the treatment described herein. The new zone designation process was not complete as of August 2026, and nothing herein is a prediction of which tracts will be nominated or certified. Whether any fund, business, zone, or property satisfies the requirements described here is a factual and legal determination that depends on circumstances not addressed in this article. This article discusses federal income tax treatment; state and local tax treatment may differ materially, and California does not currently conform to the federal Opportunity Zone gain-deferral and exclusion provisions. Potential tax benefits are subject to limitations, eligibility requirements, holding periods, elections, and applicable tax regulations, which are subject to change; eligibility for deferral depends on the type of gain, the applicable reinvestment period, the elections made, and other statutory requirements, and is not automatic. A basis step-up reduces rather than eliminates the deferred gain included in income, and the original deferred gain generally remains taxable. The 10-year holding period is a condition for potential favorable federal tax treatment, not an assurance of any outcome, and there is no guarantee of any particular tax result. Investments in real estate and in Opportunity Zone funds are speculative, illiquid, involve significant risk, and may result in partial or total loss of investment. Nothing herein describes the terms, status, or distribution policy of any particular fund or offering. Third-party data referenced herein is believed to be reliable, but its accuracy and completeness cannot be guaranteed. Past performance is no guarantee of future results. Prospective and current investors should consult their own tax, legal, and financial professionals regarding their particular circumstances.