How Do DSCR Lenders Calculate Your Interest Rate?

As interest rates for rental properties begin to decline, many real estate investors are re-evaluating financing options, especially Debt-Service Coverage Ratio (DSCR) loans. These loans primarily qualify borrowers based on rental income versus expenses, rather than personal income ratios.

We've previously discussed DSCR loans, covering key factors like Loan-to-Value (LTV) ratio, DSCR ratio, and credit score that determine interest rates. This guide goes deeper, explaining how DSCR lenders and brokers compute the exact interest rate you see in loan quotes.

The Role of Rate Sheets and Scenario Tools
Lenders start their day with a rate sheet, a document outlining:
• A range of interest rates (in 12.5-basis point increments)
• A premium number for each rate, typically around 100
• Loan-Level Price Adjustments (LLPAs), which modify premiums based on risk factors
LLPAs increase or decrease the base rate depending on the perceived risk level of the loan. Higher-risk loans—like those with high LTVs or low DSCR ratios—have higher interest rates. Lower-risk loans—such as those with strong credit scores—qualify for better rates.
Lenders use software tools to input borrower and property details, applying LLPAs to arrive at an interest rate that meets their required premium (e.g., 100 or higher). The final rate and points offered are a result of this calculation.

The Bucket System: Understanding How Rates Are Grouped
DSCR lenders use buckets (mini-ranges) instead of exact figures for certain metrics:
• Credit Scores: Ranges like 700-719 and 720-739 have the same LLPA.
• LTV Buckets: Incremental changes affect LLPAs differently (e.g., a 5% jump in LTV from 70.1% to 75% could increase rates more than a 5% jump from 50% to 55%).

Key LLPA Factors:
1. Credit Score & LTV Matrix: Determines base pricing; higher credit and lower LTV mean better rates.
2. DSCR Ratio: Not always in the main matrix but still a significant LLPA factor.
3. Loan Size:
o Too large (above $1.5M) → Higher risk due to fewer buyers
o Too small (under $100K) → Higher processing costs → Higher rates
o Ideal loan size: $250K - $1M (best rates)
4. Property Type:
o Single-Family Residences (SFRs) → Best rates (largest market, easiest to sell)
o Condos, Multi-Units, and Niche Properties → Higher rates due to fewer buyers
5. Loan Purpose:
o Acquisition → No LLPA
o Rate-Term Refinance → Minor LLPA
o Cash-Out Refinance → Higher LLPA (riskier, borrower taking cash out)
6. Loan Structure:
o Interest-Only Loans → Higher rates
o Fixed-Rate Loans → Higher rates than Adjustable-Rate Mortgages (ARMs)
o Prepayment Penalties: Adding one reduces interest rates

Example: How LLPAs Affect Rates
Consider a borrower with:
• Credit Score: 725
• LTV: 70%
• DSCR: 1.18x
• Loan Size: $500K
• Prepayment Penalty: 5-year structure

The lender starts with a base rate of 7% and premium of 100.625:
• Credit Score & LTV Adjustment → -0.50% LLPA
• DSCR Ratio (1.18x) → No LLPA impact
• Prepayment Penalty (5/4/3/2/1) → +0.50% LLPA

Final premium: 101 → Borrower gets 7% interest rate with a 1% origination fee.
Rate Buy-Down Example:
If the borrower wants 6.5% instead of 7%, they can pay additional points:
• Base Rate of 6.5% → 99.625 premium
• Final premium: 100 → 2% origination fee instead of 1%.

Final Thoughts
Understanding DSCR loan pricing helps investors optimize financing decisions. By adjusting LTV, credit scores, DSCR ratios, and loan structures, borrowers can influence their final interest rates and fees.