Quick Answer: Residential investment loans finance the purchase or refinance of 1-4 unit rental properties for real estate investors — including single-family rentals, duplexes, triplexes, and fourplexes.
For real estate investors and small business owners expanding into residential rental income, dedicated investment property loans provide the financing needed to acquire or refinance 1-4 unit properties. These loans are underwritten differently from primary residence mortgages — lenders focus heavily on the property’s rental income potential and the investor’s experience.
Residential Investment Loan Types
| Loan Type | Best For | LTV | Rate Range | Term |
|---|---|---|---|---|
| Conventional Investment Loan | Established investors, strong credit | 75-80% | 7-10% APR | 15-30 years |
| DSCR Loan (Debt Service Coverage) | Investors qualifying on rent income | 70-80% | 7.5-12% APR | 15-30 years |
| Hard Money/Bridge Loan | Fix-and-flip, fast closing | 65-70% | 10-18% APR | 6-24 months |
| Portfolio Loan | Multiple property investors | 70-75% | 7-11% APR | 5-30 years |
DSCR Loans: Qualify on Rental Income
DSCR (Debt Service Coverage Ratio) loans are the most popular option for residential investors. Instead of using personal income to qualify, lenders use the property’s rental income divided by the mortgage payment. A DSCR of 1.0+ means the rent covers the mortgage; 1.25+ is preferred by most lenders.
Qualification Requirements
- Credit score: 640+ minimum; 680+ for best rates
- Down payment: 15-25% (investment properties require more than primary residences)
- Cash reserves: 6-12 months of mortgage payments in reserve
- Property type: 1-4 unit residential (single-family, duplex, triplex, fourplex)
- Appraisal: As-is market value + rental rate appraisal required
Residential vs. Commercial Real Estate Loans
Residential investment loans (1-4 units) are underwritten like enhanced residential mortgages and typically carry better rates than commercial real estate loans. Properties with 5+ units are classified as commercial and require commercial mortgage products. Most investors start with 1-4 unit properties because of the better financing terms and lower barriers to entry.
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Sources: National Association of Realtors Investment Property Survey 2023; Federal Reserve Mortgage Data H.8. Last updated: May 2026. Small Business Loans Today is an affiliate publisher — not a lender.