What this investment property mortgage model connects
The calculator links purchase price, acquisition equity, financing costs, a fixed-rate mortgage schedule, and one annual NOI input. Keeping those figures in one scenario makes LTV, debt coverage, debt yield, and cash required use the same loan balance rather than separate manually copied assumptions.
EstateCalc does not retrieve rates or determine approval. Enter terms from a quote, loan estimate, or labeled scenario. Results are calculation outputs and do not describe a leverage or coverage level as acceptable or unacceptable for a particular lender or investment.
Down payment versus an explicit mortgage override
With override set to 0, principal is the purchase price less down payment. With override set to 1, the explicit amount controls the schedule, LTV, fees, and debt metrics. Acquisition equity is then recalculated as price less the used mortgage, so the original down-payment field is not counted a second time.
The explicit mortgage cannot exceed purchase price in this acquisition model. Derived mode makes acquisition equity equal the entered down payment. Override mode is useful when lender proceeds differ from a simple down-payment calculation because of a quoted maximum or a deliberately lower borrowing amount.
P&I payment, amortization, and balloon maturity
The monthly result is level principal and interest calculated from the nominal annual rate and amortization months. It is not a full property payment: real estate tax, landlord insurance, HOA, mortgage insurance, escrow contributions, and reserves are outside the P&I figure even when a lender collects them monthly.
The maturity term can end before amortization, producing a balloon balance. Total debt payments combine scheduled P&I through that term with the balloon payoff, and total interest subtracts original principal from that combined amount. If maturity extends beyond full amortization, payments stop when the balance reaches zero.
NOI, DSCR, debt yield, and LTV
LTV compares the used mortgage with purchase price. DSCR compares annual NOI with up to 12 first-year scheduled P&I payments, excluding the balloon and fees. Debt yield compares that same NOI with principal and therefore does not change merely because the interest rate or amortization period changes.
Use NOI calculated before debt service and on the same annual basis as the first-year denominator. This page does not rebuild scheduled rent, vacancy, other income, operating expenses, or capital reserves. Use the rental property calculator for a detailed cash-flow scenario and transfer consistent assumptions between the pages.
Acquisition cash and important exclusions
Cash required is purchase price less the used mortgage, plus the percentage origination fee and entered closing costs. In derived mode this begins with the stated down payment; in override mode it begins with recalculated acquisition equity. Reserves, escrows, prorations, credits, and unentered charges can make actual closing cash different.
The model excludes adjustable rates, interest-only periods, points not represented by the origination-rate input, buydowns, subordinate liens, prepayment penalties, daily-interest conventions, and refinance costs. It is not a payoff statement or offer. Verify the note, settlement figures, and servicer schedule before a transaction decision.
Mortgage Calculator Investment Property FAQ
How is the investment property mortgage amount set?
With override at 0, principal is purchase price minus down payment. With override at 1, the explicit amount is used and acquisition equity is recalculated as purchase price minus that mortgage.
Does the monthly mortgage payment include taxes and insurance?
No. It is principal and interest only. Property taxes, insurance, HOA dues, mortgage insurance, escrows, reserves, and operating expenses are excluded.
Why does the calculator show a balloon balance?
A balloon remains when the maturity term ends before the amortization schedule. It is included in total debt payments but shown separately from regular monthly P&I.
How does NOI affect the mortgage results?
NOI does not change the payment. It is divided by first-year scheduled debt service for DSCR and by mortgage principal for debt yield.
What costs are included in cash required?
Purchase price less the used mortgage, plus the calculated origination fee and entered closing costs. Reserves, escrows, prorations, credits, and unentered charges are outside the result.
Continue the property analysis
Compare this result with adjacent metrics, keeping each formula’s income, expense, and financing scope consistent.