Should you swap your current mortgage for better terms on a rental property? This DSCR refinance calculator gives real estate investors a clear comparison of existing debt against a new loan, so the answer becomes obvious in minutes. Plug in your numbers below and see whether the deal pencils out.
DSCR Refinance Calculator
Should you refinance? Compare your current loan vs. a new DSCR loan and see your potential savings.
How This Tool Works
The debt service coverage ratio measures whether a property’s rental income covers its monthly debt obligation. A DSCR loan focuses on the property’s cash flow rather than your personal income, which is why this metric matters so much for investor lending. This tool compares your current mortgage against a proposed refinance loan, then reports the coverage ratio for each scenario.
You get four outputs: monthly payment change, ratio change, cash flow impact, and a break-even timeline that accounts for closing costs.
What You Need Before Starting
Gather two groups of numbers to get accurate results.
Current loan details
- Remaining balance
- Interest rate
- Monthly payment
Property details
- Current market value (use recent comps, not Zillow alone)
- Monthly rent
- Annual property taxes
- Annual insurance
- HOA dues, if applicable
Pull most of this from your lender portal or mortgage statement. For value, an appraisal rules.
Step-by-Step: Using the Tool
1) Enter Your Current Loan
Start with the existing balance, rate, and payment. Even a small error shifts your break-even point by months.
2) Add Property Details
Enter the property’s value, monthly rent, yearly taxes, insurance, and HOA. This is where the math matters most. The tool compares income to the total monthly obligation to see if the property generates enough income to cover its debt.
3) Choose Your New Loan Scenario
Pick between a rate-and-term swap or a cash-out refinance.
Rate-and-term: Replace the existing mortgage with better terms. No funds withdrawn. The aim is a lower payment or reduced interest.
Cash-out: Borrow against equity and pull funds at closing. Most lenders cap this around 75% LTV, though the exact limit depends on the borrower profile.
Enter the proposed rate, LTV percentage, loan term (30-year fixed or interest-only), and any cash-out amount. If you hold the property under an LLC structure, keep that consistent across comparisons.
Reading Your Results
The output section shows four items that indicate whether the deal works.
Monthly Payment Change: Will it go up or down?
Coverage Ratio Change: Does the new loan improve or weaken your position? The ratio is calculated by dividing rental income by the monthly debt obligation.
Cash Flow Impact: The monthly and annual difference in your pocket, including how expense changes show up.
Break-Even Point: How many months of savings it takes to recover closing costs. One mistake I see repeatedly: investors ignore this number and focus only on the rate drop.
Choosing the Right Option
Pick rate-and-term when you want lower interest rates or a smaller monthly payment without changing your liquidity. Pick a DSCR cash-out refinance when you need to extract equity for another acquisition, fund property improvements, or build reserves.
A higher payment isn’t always a dealbreaker. If pulling equity lets you reinvest through a BRRRR strategy, the net return can justify the added cost.
Tips to Optimize Your Outcome
- Get rate quotes from two or three lenders before running numbers
- Be conservative on value since the appraisal decides the real number
- Factor in all closing costs, typically 2% to 4% of the loan amount
- Plan how you’ll use the funds if pulling cash out
- Keep a reserve buffer so one vacancy doesn’t tank your coverage
Be prepared for a credit pull during the application process, plus verification steps like leases and bank statements. Comparing current rates across lenders saves thousands over the life of the loan.
When Refinancing Typically Makes Sense
You benefit most when you can drop the rate by at least 0.5%, or when you can tap equity while keeping the ratio above 1.0. The threshold is simple: the property must generate enough income to cover the obligation. That’s what every lender evaluates.
If your portfolio holds multiple investment properties, running each one through this tool helps you prioritize which deal to pursue first. Pair it with the general loan qualification tool to calculate eligibility before you apply.
Frequently Asked Questions
What is the debt service coverage ratio?
It’s a formula that compares a property’s rental income to its total monthly debt. A ratio above 1.0 means the income covers the payment. Most lenders require 1.0 or higher to qualify for this type of loan.
Can I refinance an investment property without W-2 income?
Yes. A DSCR loan is built around cash flow from the property, not personal earnings. It’s designed for investors who may be self-employed or hold properties in an LLC.
What closing costs should I include?
Lender fees, appraisal, title, escrow, and any points. Don’t skip these. They shift the break-even timeline significantly and can make a borderline deal unprofitable.
What happens if the ratio drops after refinancing?
That usually signals the new monthly payment is too high relative to rental income. It happens most often with cash-out scenarios. Run the numbers here first to avoid surprises.
Is Zillow accurate for property value?
It works as a rough estimate. Lenders rely on a formal appraisal, not an online figure. Use comps and local data to get closer to reality before you commit.
Use this DSCR refinance calculator to evaluate your refinance options in minutes. Then compare top lenders, shop terms, and tailor your next move to align with long-term financial stability.