How to use the calculator
- Enter the price and down payment. Check that the appraisal is likely to support the price.
- Choose a fixed-rate payment estimate or enter a total housing payment yourself.
- For a payment estimate, enter your rate, term, taxes, insurance, dues, and other required charges.
- Enter rent that has a reasonable basis. The lender must still decide what rent it accepts.
- Add costs not already in the housing payment, plus a vacancy allowance.
- Compare the starting case with rent 10% and 20% lower.
The tool does not approve a loan, choose a credit tier, work out APR, or price points. It does not model adjustable rates or interest-only terms. Those require a separate review.
What goes into the housing payment?
| Item | Why it matters |
|---|---|
| Principal and interest | The amount paid toward the loan and interest each month. |
| Property taxes | Use a sound estimate for the purchase, not just a seller’s old bill. |
| Home insurance | Get a quote for the actual rental use and property. |
| Flood insurance | Include it when required or when you choose to carry it. |
| HOA or condo dues | Include the required association payment. |
| Other required charges | Certain solar payments and other applicable housing obligations can affect the lender’s test. |
If a charge is already in your tax or insurance estimate, do not add it twice. For example, check whether a local district charge is already part of the tax bill before adding it elsewhere.
For your investment budget, also allow for repairs, management, leasing, utilities you pay, lawn or pool service, and major replacements. Only put costs in the extra-cost field if they are not already in the housing payment.
DSCR is not the same as cash flow
DSCR = accepted rent ÷ housing payment used in the loan review.
Cash-flow estimate = rent − housing payment − vacancy allowance − other costs to run the rental.
Here is one illustration with a $3,200 housing payment, $500 in extra monthly costs, and a 5% vacancy allowance. It assumes the housing payment stays the same.
| Case | Rent | DSCR | Cash left each month |
|---|---|---|---|
| Starting rent | $4,000 | 1.25 | $100 |
| Rent falls 10% | $3,600 | 1.125 | −$280 |
| Rent falls 20% | $3,200 | 1.00 | −$660 |
These are stress tests, not a forecast of Florida rents. The vacancy and extra costs are your planning assumptions, not deductions used to work out the lender’s DSCR.
Passing the ratio test does not pay the repair bill. Keep enough cash for the parts of ownership the lender’s formula does not measure.
Why can two buyers get different rates?
A lender prices the whole scenario. Common inputs include credit, loan size, share of the price borrowed, ratio, property type, term, and early-payoff features.
There is also a loop to check: a higher rate can raise the payment, and a higher payment can lower the ratio. A quote based on a strong ratio needs to be tested again with the quoted payment.
That is why a headline rate without the full scenario tells you very little. A real comparison needs the same property, loan amount, credit, ratio, lock period, and terms.
Compare rate, points and fees together
One point equals 1% of the loan amount. On a $400,000 loan, one point is $4,000. That is a math example, not a quoted charge.
Some offers charge more upfront to lower the rate. Others may use a higher rate with less upfront cost. Ask how long you would need to keep the loan for any monthly savings to recover the extra cost.
Here is a simple comparison method. If one option costs $4,000 more upfront and saves $100 a month, the simple break-even time is 40 months. That estimate leaves out changes in principal, taxes, investment returns, and other factors. It is a starting point for review.
Before choosing an offer, line up:
- Interest rate and loan term.
- Points and lender or broker charges.
- Costs paid to other companies and prepaid items.
- Monthly payment with property charges.
- Cash due at closing and reserves left afterward.
- Lock period and when it ends.
- Any prepayment penalty and the exact terms.
What does a prepayment penalty change?
Some DSCR terms include a charge for paying off or paying down the loan early. A sale or a large principal payment may trigger it, depending on the contract.
A lower rate with that charge is not the same offer as a loan without it.
Ask these questions before you choose:
- What actions trigger the charge?
- How is it worked out?
- What is the charge in each year?
- When does it end?
- Is a no-penalty option available for this scenario, and what does it cost?
Do not assume every Florida investment loan has the same penalty. The product, purpose, rules that apply, and signed terms all matter.
What about interest-only payments?
An eligible interest-only loan can have a smaller payment during the interest-only period. You still owe the principal unless you pay it down separately.
In this DSCR profile, an eligible interest-only payment can be used in the ratio along with required property charges. No Ratio loans do not allow interest-only terms.
The later payment may be much larger when principal repayment starts. An adjustable rate can add another change. Ask for both the starting payment and the later-payment method before choosing this structure.
This page’s calculator uses a fixed rate and payments that pay off the loan by the end of its term. You can also enter a total payment yourself. The tool does not model those other loan types.
Do not spend the reserve cushion at closing
The reviewed profile requires three months of reserves for the home you buy for loans up to $500,000 and six months for larger loans. Those funds remain after closing and must meet the asset rules.
The tool shows a rough reserve illustration using the payment entered or estimated. It is not the final reserve math or a full cash-to-close statement.
Set a separate repair and vacancy budget too. The lender’s reserve minimum does not tell you how much cash your particular rental may need.
Common questions about DSCR pricing
Are the rates in this calculator live?
No. You enter the rate yourself, or enter a payment you want to test. It is a planning tool. Ask for a scenario-specific quote to see available pricing.
Why is my quote different from a website rate?
The website example may use a different credit score, down payment, ratio, property, points, or early-payoff term. Compare the assumptions and the total costs.
Is a 1.00 ratio enough?
It may fit a program row, but it leaves no gap between accepted rent and the payment used in the loan review. It does not cover other costs by itself. The full loan rules and your own cash-flow plan both matter.
Should I buy because I can refinance later?
Only buy if the current terms work for your plan. A future refinance depends on new approval, pricing, value, and costs. It is not guaranteed.
Can the calculator tell me my maximum price?
It can help you test prices. It cannot replace credit, appraisal, rent, property, and asset review. Do not use its output as a lender approval or a promise to a seller.
Bring us the deal, not just the rate
Send the address, price, rent support, available cash, and any quote you want to compare. We can check whether the rent still supports the loan after the actual pricing and costs are applied.
Review the full purchase with Shahram or check the DSCR requirements.

