Financing is often the make-or-break variable in a real estate investment. Understanding the landscape of loan products available to investors — and what lenders actually look at when evaluating a deal — is the foundation of building a sound acquisition strategy. The best property in the wrong market at the wrong price with the wrong financing will underperform. Conversely, a well-negotiated acquisition with conservative leverage and favorable terms can survive market headwinds and generate returns even in challenging conditions.

Loan Types: Conventional, FHA, and Portfolio Products

Conventional loans are the most common for investor purchases. Underwritten to Fannie Mae or Freddie Mac guidelines, they require a minimum 20% down payment for investment properties, though some lenders go down to 15% for strong credit profiles and well-documented income. Interest rates typically run 0.5-0.75% higher than primary residence loans. Conventional loans are sold into the secondary market, which means the lender originates the loan and then sells it to an aggregator — this creates standardization in underwriting that can make the process more predictable for well-qualified borrowers.

FHA loans are available for 1-4 unit owner-occupied properties but do not apply to purely investment holdings. If you plan to house-hack — live in one unit and rent the others while using an FHA loan with just 3.5% down — this can significantly reduce your capital requirement on a first acquisition. The FHA loan does carry upfront and annual mortgage insurance premiums, so you need to factor that into the cost of capital.

Portfolio lenders are banks or credit unions that hold loans in-house rather than selling them into the secondary market. They often have more flexible underwriting criteria and may accept deals that conventional lenders decline, particularly for multi-family or mixed-use properties where the borrower's overall profile is strong but one metric — perhaps a slightly elevated DTI — disqualifies them from agency guidelines. Portfolio lenders also tend to be better long-term relationship partners for active investors building a multi-property portfolio.

What Lenders Actually Evaluate

The primary metrics lenders look at for investment property loans are your credit score, debt-to-income ratio, and the property's projected cash flow. Most lenders want to see a credit score above 680 for investment property borrowers, though some go lower with rate adjustments. The DTI limit is typically 45-50% for all debts including the proposed investment property mortgage, measured against your documented income.

For investment properties, lenders want to see that rental income covers the mortgage payment — typically requiring a 1.25x debt service coverage ratio on the subject property after accounting for vacancy and maintenance reserves. Your liquidity and overall portfolio also factor into the decision, particularly for multi-property investors. Most lenders want to see six months of mortgage payments in reserves for each investment property, and some require reserves equivalent to two years of payments for borrowers seeking loans on their fourth or fifth property.

The Pre-Approval Process and Why It Comes First

Before looking at properties, get a pre-approval letter from a lender familiar with investment properties. This tells sellers you are a serious buyer with financing already reviewed and allows you to move quickly when you find a deal. In competitive markets, pre-approval is not optional — it is table stakes. A pre-approval letter also surfaces any credit or income issues before you invest weeks of due diligence work on a property you may not be able to finance. If your credit needs work or your income documentation is complex, resolve those issues before you start writing offers. Nothing kills a deal faster than a financing fall-through after the inspection period has passed.