Two Ways to Qualify for an Investment Property Loan
When financing a rental property, lenders use one of two primary metrics to determine eligibility: DTI (Debt-to-Income Ratio) or DSCR (Debt Service Coverage Ratio). Each approach serves a different type of borrower, and choosing the right one can mean the difference between getting approved or getting stuck.
This guide breaks down both metrics, compares them side by side, and helps you determine which path fits your investment strategy.
What Is DTI?
Debt-to-Income Ratio is the traditional underwriting metric used by conventional lenders. It compares your total monthly debt payments to your gross monthly personal income.
DTI = Total Monthly Debts / Gross Monthly Income
For example, if you earn $10,000/month and have $3,500 in total monthly obligations (mortgage, car payment, student loans, credit cards), your DTI is 35%.
Most conventional lenders cap DTI at 43% to 50%. The more properties you own, the harder it becomes to stay under this threshold because each new mortgage adds to your debt side.
What Is DSCR?
Debt Service Coverage Ratio evaluates the property, not the borrower. It compares the rental income to the mortgage payment on that specific property.
DSCR = Property NOI / Annual Debt Service
A DSCR of 1.0 means break-even. A DSCR of 1.25 means the property earns 25% more than the mortgage costs. Your personal income, employment status, and other debts are not part of the calculation.
Head-to-Head Comparison
| Factor | DTI (Conventional) | DSCR |
|---|---|---|
| What it measures | Borrower income vs. all debts | Property income vs. property debt |
| Tax returns required | Yes (2 years) | No |
| Employment verification | Yes | No |
| Property limit | Usually 10 financed | No limit |
| Typical down payment | 15%-25% | 20%-25% |
| Min credit score | 620-680 | 660-680 |
| Closing speed | 30-45 days | 21-30 days |
| Rate comparison | Lower rates | Slightly higher rates |
| Best for | First 1-4 properties | Scaling beyond 4+ properties |
When DTI Makes Sense
DTI-based conventional loans offer the lowest interest rates and are ideal for investors who:
- Have strong W-2 income or documentable self-employment income
- Own fewer than 10 financed properties
- Can keep total DTI under 45%
- Want the lowest possible rate on a long-term hold
When DSCR Makes Sense
DSCR loans remove the income documentation barrier and are ideal for investors who:
- Are self-employed with complex tax returns that minimize taxable income
- Already own 5+ financed properties and hit conventional limits
- Want to close quickly without gathering extensive documentation
- Are building a portfolio under an LLC or entity
- Have rental income that supports the debt but DTI is maxed from other obligations
Can You Use Both?
Yes. Many investors start with conventional DTI-based loans for their first few properties to take advantage of lower rates, then switch to DSCR loans as their portfolio grows and DTI becomes a limiting factor. This hybrid approach maximizes leverage while keeping borrowing costs low in the early stages.
Calculate Your DSCR Now
See if your property qualifies for a DSCR loan before you apply. Our free calculator shows your ratio, estimated payment, and eligibility in seconds.
Try the FAAS Funding DSCR Calculator
Ready to move forward? Get pre-qualified for a DSCR loan today.