The direct answer
Cap-rate compression means the capitalization rate declines; expansion means it rises. Holding NOI constant, a lower cap rate increases a direct-capitalization estimate of value and a higher cap rate reduces it. In actual markets, NOI expectations and risk can change at the same time as cap rates.
Use the direct capitalization identity
For compatible stabilized NOI and market cap-rate assumptions, indicated value equals NOI divided by the cap rate. Keep the NOI period and value premise consistent.
To apply the approach to an editable scenario, use the Commercial Property Valuation Calculator. For the neighboring question, explore Cap Rate Calculator.
Run more than one cap-rate assumption
A small rate change can create a large valuation difference, especially at low initial cap rates. Show the resulting values rather than extrapolating a guaranteed price.
Interpret cap rates as market assumptions
Financing conditions, property quality, rent growth, location and liquidity can influence observed capitalization rates. An observed historical spread is not a certain future adjustment.
Worked example
At $150,000 annual NOI, a 6% cap rate implies $2.5 million. At 5.5%, the same NOI implies about $2.73 million; at 6.5%, about $2.31 million. The example isolates rate risk, not a market forecast.
Open Commercial Property Valuation Calculator and test your assumptions →
Common mistakes and limitations
Do not treat lower interest rates as an automatic or proportional reduction in every property cap rate.
Direct-capitalization estimate only. Cap rate selection and stabilized NOI require market judgment; not an appraisal.
Frequently asked questions
Does cap-rate expansion reduce value?
With NOI held constant in a direct-capitalization model, yes.
Can value rise while cap rates expand?
Yes, if NOI increases enough to offset the higher cap-rate assumption.
Sources and further reading
The article’s examples are illustrative arithmetic. The references below provide context for operating, valuation or transaction concepts; they do not endorse the assumptions or the calculator.
- Office of the Comptroller of the Currency — Comptroller's Handbook — Commercial Real Estate LendingNOI, direct capitalization, cap-rate valuation and DCF concepts for commercial real estate.
- Appraisal Institute — Basic Formulas — Income CapitalizationIncome/cap-rate/value relationships, gross income multiplier and debt-coverage formula references.
Read our editorial policy for the scope of these educational methods.