DSCR Coverage Calculator: Choose the Definition
Choose operating-income or accepted-rent coverage. Compare the selected ratio, payment budget and hypothetical loan principal without implying approval.
What This Calculator Does
Compare a rental property's income and payment under an explicit coverage definition. One model uses net operating income divided by loan principal and interest; the other uses supplied lender-accepted rent divided by principal, interest and classified housing costs. The selected target and note terms produce a hypothetical coverage-only principal limit, not an approved loan or a universal lender rule.
Who Is This For
For property investors and real-estate professionals comparing a defined coverage scenario with lender-supplied rent, cost classifications and terms. Confirm the applicable program outside the calculator; borrower eligibility, property value, leverage and reserves remain separate requirements.
How It Works
Choose the formula. For operating-income coverage, enter gross rent, vacancy/collection loss and complete operating expenses. For accepted-rent coverage, enter the program's qualifying rent directly and a separate taxes/required-insurance/association bucket. Enter comparison loan principal, hypothetical fixed nominal annual rate, amortization years and a multiplier target such as 1.35×. Rate/term are still required at loan 0 for capacity. Confirm, then compare raw-target status, signed payment budget and hypothetical principal.
Frequently Asked Questions
Why choose a coverage definition before entering rent?
Operating-income coverage deducts the supplied vacancy and operating costs from gross rent, then divides by principal and interest only. Accepted-rent coverage uses the qualifying rent already accepted by the selected lender program and divides by principal/interest plus separately classified housing costs. These numerators and denominators differ. Gross, collected and qualifying rent are not interchangeable; switching does not establish accepted rent or turn operating expenses into housing costs.
Can the same supplied numbers meet one target and miss another?
Yes. Illustrative gross rent $4,000, vacancy 5%, operating costs $900 and a $320,000 loan at a hypothetical 7% over 30 years give operating income $2,900 and principal/interest about $2,128.97: ratio about 1.3622×, meeting a selected 1.35× target. A separately specified program accepting rent $4,000 with $900 of actual taxes/insurance/association costs gives a $3,028.97 denominator and about 1.3206×, below 1.35×. Coverage-only principal limits are about $322,882.92 and $310,078.95 respectively. Neither result approves financing.
Does the accepted-rent model infer a lender's haircut or rent choice?
No. Supply the monthly qualifying rent accepted for that program. The calculator does not choose a lease versus appraisal, apply an undocumented program reduction or decide eligibility. It does not deduct vacancy again from that accepted amount. Operating-income mode instead uses gross scheduled rent with an explicit vacancy/collection allowance. Each definition retains its own rent basis; do not copy a net or gross figure into the other without confirmation.
Which costs belong in the full housing payment?
The separate bucket contains the program's documented monthly taxes, required insurance and association/assessment amounts, excluding the principal/interest already modeled. Repairs, management and arbitrary operating totals are not automatically part of it. Operating-income mode uses complete expenses under the externally confirmed NOI convention and no separate housing bucket. Inactive fields are not applicable, not confirmed zero. Count each cost once and confirm the lender's classifications.
What happens when the comparison loan is zero?
Principal/interest is 0. Operating-income coverage then has a zero denominator and undefined ratio, while capacity can remain positive. Accepted-rent coverage can have a finite ratio if other housing costs are positive: $4,000 accepted rent and $900 costs give about 4.4444× with loan 0. If those costs are also 0, the ratio is undefined. Rate and term remain explicit because hypothetical capacity is still calculated. None of these states establishes a cash purchase or approval.
Can a met target still leave no positive new loan budget?
Yes. Accepted rent $1,250, fixed housing costs $1,000, comparison loan 0 and target 1.25× give a ratio of exactly 1.25×. The principal/interest budget is $1,250/1.25−$1,000=0, so hypothetical capacity is 0. With accepted rent $1,000, fixed costs $1,500 and target 1.25×, the signed budget is −$700; it remains visible and capacity is 0 with a cost-exhaustion reason. Nonpositive operating income also gives no positive capacity. These are supplied scenarios, not program quotes.
What does the target or hypothetical principal limit mean?
The target is a multiplier, not a percentage: 1.35 means 1.35×. The 0.8–2 range is computational, not a law or lender standard. A target below 1 can allow debt payments above the modeled income. Available principal/interest budget is income divided by target, less active fixed housing costs; its positive amount is converted to principal at the supplied rate/term. The result uses only coverage, not property value, LTV, credit, reserves, down payment or program loan limits. Input bounds are not a legal cap on output.
How do precision and loan assumptions affect the result?
Money inputs preserve cents and vacancy, rate and target allow four decimals. Coverage status, signed budget and capacity use unrounded theoretical payments, not a servicer's cent ledger. Displaying 1.35× does not meet 1.35× if the underlying ratio is 1.34999. Annual numerator and denominator both equal monthly amounts times 12; the ratio is neither annual return nor a hold-period projection. Only fully amortizing fixed-rate terms are modeled; the nominal note rate is not the annual rate including costs (APR) or a market quote. Income taxes and investment return are excluded.