A split roll property tax is a system that sorts properties into classes and applies different tax rules to each class, most often taxing commercial and industrial real estate more heavily than homes. Instead of treating every parcel the same way, the jurisdiction maintains separate rules for each category, with its own assessment ratio, tax rate, or reassessment schedule. Over a dozen U.S. states use some version of this approach, and it remains one of the more contested ideas in local tax policy because it directly determines how the property tax burden gets divided between homeowners and businesses.
The “roll” in the name refers to the tax roll, the official list of taxable properties and their assessed values. A split roll effectively creates more than one version of that list, each governed by its own formulas.
The Three Ways a Split Roll Treats Classes Differently
Under a uniform property tax system, every property in a jurisdiction is assessed the same way and taxed at the same rate. A split roll breaks that uniformity in one of three ways, and some jurisdictions combine more than one.
The first mechanism is different tax rates. Commercial properties pay a higher rate per dollar of assessed value than residential properties do. The second is different assessment ratios, meaning commercial property is assessed at a larger percentage of its market value than a home is. The third is different reassessment schedules, requiring commercial properties to be revalued at current market prices more frequently while homes keep an older, lower assessed value with limited annual increases.
How Assessment Ratios Change the Tax Bill
Assessment ratios are the most common tool in a split roll, and the math is worth walking through because it can be counterintuitive. An assessment ratio is the percentage of a property’s market value that actually gets taxed.
Say a jurisdiction sets the residential assessment ratio at 10% and the commercial ratio at 16%. A home worth $400,000 has a taxable value of $40,000. A commercial building worth the same $400,000 has a taxable value of $64,000. Even with an identical nominal tax rate, the commercial building’s tax bill runs 60% higher. That gap is the entire point of the split roll. The assessment ratio does the heavy lifting quietly, without the jurisdiction ever announcing that it charges businesses a higher rate.
In practice, some states maintain just two or three property classes with modest ratio differences. Others have carved out fifteen or more classes, with assessment fractions ranging from as low as 1% to as high as 50% of market value.
Commercial vs. Residential Classification
The most widespread split roll divides property into two broad buckets: commercial and industrial on one side, residential on the other. Residential property generally gets the more favorable treatment, whether through lower assessment ratios, lower rates, or less frequent reassessment. The policy logic is straightforward. Homes are where people live and build household wealth, so the tax system gives them a lighter touch. Commercial property generates business income, so the assumption is that owners can absorb higher taxes more easily.
The distinction gets complicated fast. A duplex where the owner lives in one unit and rents the other straddles the line. A warehouse converted into loft apartments has changed categories entirely. In most classified systems, the assessor must determine not just a property’s value but also its use, and that classification decision directly controls how much tax the owner pays. Owners taxed at the commercial rate have a financial incentive to argue their property qualifies as residential, which creates an ongoing source of disputes and administrative work for local tax offices.
Mixed-Use Properties
Properties that combine commercial and residential uses are usually assessed by portion: the ground-floor retail space gets the commercial ratio while the apartments above get the residential ratio. Some jurisdictions simplify this with a threshold. If residential use accounts for 75% or more of the property, the entire parcel may qualify for residential treatment. Properties zoned commercial but used entirely as long-term housing are typically classified as residential regardless of the zoning designation.
Agricultural Property
Agricultural land almost always gets its own classification, and it usually receives the most favorable treatment of any category. Many jurisdictions assess farmland based on its productive agricultural value rather than what a developer might pay for it, which can dramatically reduce the taxable value. The carve-out reflects a policy choice to keep farming viable in areas where rising land prices would otherwise make property taxes unaffordable for agricultural operations.
Why Jurisdictions Adopt Split Roll Systems
The case for split roll rests on a few connected arguments. The most prominent is revenue. When commercial property is assessed at higher ratios or revalued more frequently, the tax base grows, generating more money for schools, infrastructure, and local services without raising rates on homeowners. Supporters frame this as asking businesses to pay their fair share, particularly in jurisdictions where long-held commercial properties have been assessed well below their actual market value for decades.
A second argument is about equity between property types. In a uniform acquisition-value system, a commercial building purchased forty years ago might be assessed at a fraction of its current worth, while a home bought last year is assessed at full purchase price. Split roll supporters argue that commercial property, which generates rental income and business profits, should not receive the same taxpayer protections designed to keep longtime homeowners from being taxed out of their houses.
There is also a political appeal. Shifting tax burden toward commercial property is easier to sell to voters than a general tax increase, because most voters are homeowners, not commercial landlords.
Criticisms and Drawbacks
The arguments against split roll come from several directions.
- Poor targeting. Every homeowner benefits from the lower residential rate, regardless of income. A mansion gets the same favorable ratio as a modest starter home. Because the only qualification is owning residential property, the system does nothing to distinguish taxpayers who genuinely need relief from those who do not.
- Tax shifting onto renters. Apartment buildings are typically classified as commercial, or at least taxed at a higher rate than owner-occupied homes. Renters, who are disproportionately lower-income, can end up bearing a heavier property tax burden than homeowners. Some jurisdictions have created separate classes for rental housing to address this, but many have not.
- Administrative complexity. Assessors must determine not just what each property is worth but what category it belongs to. Every additional classification creates new boundaries to police, new disputes to adjudicate, and new opportunities for owners to game the system. Research on assessment accuracy consistently shows that uniform full-market-value systems produce more equitable results than complex classification schemes.
- Fairness between similar taxpayers. Two owners at the same income level, with identically valued properties, can pay very different tax bills simply because their properties are used differently. That disconnect between ability to pay and actual tax burden strikes some observers as fundamentally unfair, even if the policy achieves other goals.
- Business climate. Higher commercial property taxes increase operating costs for businesses, which can discourage investment, reduce property values, and push employers toward jurisdictions with lower tax burdens. How large the effect is depends on local market conditions, but the concern features in every split roll debate.
What Split Roll Means for Tenants
The people who ultimately pay higher commercial property taxes are not always the property owners. Most commercial leases, particularly the triple-net leases common in retail and industrial space, require tenants to pay their share of property taxes on top of base rent. When a split roll increases the assessed value of a commercial building, the landlord’s tax bill goes up, and that increase flows through to the businesses leasing space in the building.
Small businesses that lease rather than own their space are especially exposed. They have no control over the property’s assessed value, limited leverage to negotiate lease terms, and thin enough margins that a significant tax pass-through can threaten viability. Opponents of split roll proposals have argued that the heaviest burden lands on small, lease-dependent businesses rather than the large corporate landowners the policy is designed to target.
Economists disagree about how much of a commercial tax increase actually gets passed to tenants versus absorbed by landlords. Some research suggests that commercial rents are driven primarily by location, vacancy rates, and local wage levels rather than by the landlord’s tax bill, meaning landlords in competitive markets may have to absorb the increase. Others point out that even if the long-term economic incidence falls on landlords, the short-term disruption hits tenants first as lease terms get renegotiated and some businesses relocate or close. The honest answer is that it depends on local market power. In a tight commercial real estate market where tenants have few alternatives, landlords can pass through nearly everything. In a market with high vacancy, they eat the cost.