Tools
Opportunity Zone tools and calculators
Free calculators for the OZ 1.0 to OZ 2.0 transition: address lookup, deadlines, the 2026 inclusion, OZ 2.0 benefits, and the compliance tests funds and businesses must pass. Each one runs the same code as our public API.
ToolOpportunity Zone lookup: is this address in a zone?Checks an address against the 2018 zones and the 2027 designation round in one step.ToolOZ 2.0 tax benefit calculatorModels the 5-year deferral, 10% or 30% step-up and 10-year exclusion against paying tax now.ToolDec 31, 2026 gain inclusion calculator (OZ 1.0)Estimates the deferred gain that comes due on Dec 31, 2026 and the tax on it.Tool180-day deadline calculatorEvery start date you can choose, the last day to invest, and whether the window reaches OZ 2.0.ToolSubstantial improvement calculatorHow much must go into a building, and by when, for it to count as QOZ property.ToolQOF 90% asset test calculatorAverages the two testing dates and estimates the penalty if a fund falls short.ToolQualified Opportunity Zone Business test checkerRuns the five tests a business must pass to be a QOZB.ToolWorking capital safe harbor plannerSpend-by dates for each cash infusion and the 62-month outer limit.ToolOZ 1.0 to OZ 2.0 transition checkerWhether a gain realized around year-end 2026 can wait for the OZ 2.0 rules.ToolCensus tract Opportunity Zone checkerEnter an 11-digit tract number to see its 2018 and 2027 status.
Estimates under the rules as written, not tax advice. Every tool cites the statute or regulation it implements on its own page.
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Financing for the real estate inside the zone.
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