Real estate rental investment offers the dual advantage of stable monthly rental income and long-term capital appreciation. However, failure to account for vacancy rates, maintenance costs, and taxes can result in lower-than-expected returns. In 2026, the Newborn Special Loan program has been expanded, significantly reducing the homebuying burden for families with newborns.
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Rental Yield Fundamentals
There are three key yield metrics for evaluating rental investments: Gross Yield (annual rent / purchase price), Net Yield (annual rent minus expenses / purchase price), and Cap Rate (net operating income / market value). Metropolitan apartments typically yield 3-5% gross, while officetels range 4-6% and commercial properties 5-8%.
📈 Rental Yield Calculator Enter purchase price, rent, and expenses to analyze yields →Practical Yield Analysis
For real investment decisions, consider leverage effects (ROI on equity after loans) and after-tax returns (factoring in rental income tax, property tax, and comprehensive property tax). The 2026 legal jeonse-to-monthly conversion rate is approximately 5.5% annually.
🏘️ Monthly Rent Calculator Calculate appropriate rent based on conversion rates →Vacancy Rates & Risk Management
Vacancy is the biggest risk in rental investment. Metropolitan apartments average 3-5% vacancy, officetels 8-15%, and commercial properties 10-20%. Choosing properties near transit stations and schools and setting rent slightly below market rate helps minimize vacancy periods.