Updated 2026 · Based on median market data for Kahului, HI
The median monthly rent in Kahului, HI is $3,510, translating to $42,120 in annual gross rental income per unit. The rent-to-price ratio is 0.35% — well below the 1% rule, making pure cash flow investing challenging at median prices and requiring investors to target below-median purchases or value-add strategies. For context, a 0.35% rent-to-price ratio means that for every $100,000 invested in property, you collect approximately $355/mo in gross rent. The gross rent multiplier of 23.5x means it takes 23.5 years of gross rent to equal the purchase price — a high ratio that reflects price appreciation outpacing rent growth.
Renters in Kahului spend approximately 50% of the local median household income ($84,200) on rent. This exceeds the standard 30% affordability threshold, suggesting rent growth may face resistance — but it also means a large portion of the population finds buying even more out of reach, supporting deep rental demand. Landlords should be cautious about aggressive rent increases and focus instead on tenant retention to minimize costly turnover.
The vacancy rate in Kahului is 4.2%. This is extremely tight — expect strong tenant demand, quick lease-ups, and leverage to set favorable lease terms. In markets this tight, landlords often see multiple applications per listing and can be highly selective on credit scores and income verification. You can also justify annual rent increases of 3-5% without significant pushback. Population growth of 0.2% annually provides stable demand.
Kahului's GRM (price divided by annual rent) is 23.5x. A GRM above 16x means the property is expensive relative to its income. Investors here are typically betting on appreciation rather than current cash flow, which adds risk if the appreciation thesis does not materialize. For comparison, the national average GRM for investment-grade rentals is approximately 13-15x. To beat Kahului's median GRM, target properties where you can achieve rents above $3,510 through renovations, better marketing, or targeting underserved tenant segments — or buy at a discount to the $990,000 median price. Every point lower on GRM translates to roughly 0.5-0.8% improvement in your cap rate.
At the median rent of $3,510/mo, a single-family rental in Kahului generates approximately $42,120 in gross annual income. After accounting for 4.2% vacancy ($1,769 lost), property taxes of $2,772, insurance (~$3,960), and maintenance (~$3,960), the estimated NOI is $29,659 per year, or $2,472/mo. Adding an 8% management fee ($3,370/yr) reduces investor cash flow further. Before debt service, you are looking at approximately $26,289/yr in landlord net income. Whether this is attractive depends on your total capital invested — at a $198,000 down payment, the unlevered yield on equity from NOI alone is 15.0%.
Rent growth in Kahului is driven by the interplay of population growth (0.2%), income growth, and housing supply constraints. With 0.2% population growth, organic rent growth will be slower — roughly 1.5% annually, taking rents from $3,510 to $3,781 over 5 years. The affordability headroom of $-1,405/mo between current rents and the 30% income threshold is essentially zero, meaning rent increases must be matched by income growth to avoid tenant turnover.
The high local income of $84,200 combined with elevated home prices ($990,000 median) creates a tenant base of working professionals — often young professionals, dual-income couples, and corporate relocations who choose to rent for flexibility. These tenants typically have strong credit, stable employment, and expect well-maintained properties with modern finishes. They are less price-sensitive but more demanding on property condition and responsiveness. In a smaller market of 50,000 residents, word-of-mouth and local listing platforms may be more effective than national sites for finding tenants.
Kahului is a smaller market where professional PM options may be limited. Fees can run 10-12% of rent, and the quality of available managers varies widely. At $3,510/mo, management costs roughly $386/mo. Self-management makes sense if you are local, have fewer than 5 units, and the rent level justifies your time — at $3,510/mo per unit, the income per unit is high enough that professional management is clearly affordable and preserves your time for deal sourcing.
Kahului vs Hawaii state average and national average across key investment metrics. Kahului's cap rate is below both benchmarks — deal sourcing is critical here.