Mortgage Calculator
Your mortgage payment is the single largest fixed expense in any rental property deal. Get it wrong and you are analyzing a deal that does not exist. This calculator gives Indianapolis-area investors an accurate, instant estimate of monthly principal and interest payments on any fixed-rate mortgage — so you can underwrite deals confidently, compare loan scenarios side by side, and walk into lender conversations already knowing your numbers.
Calculate your mortgage
Note: Calculators display default values. Enter new figures to override.
mortgage payment
Important Disclaimer & Limitation of Liability
This mortgage calculator is provided for general informational and illustrative purposes only. All results, figures, and estimates generated by this tool are based solely on the values you enter and are approximations only. They do not reflect actual loan offers, commitments, or guarantees of any kind.
This tool does not constitute financial, legal, tax, lending, or professional advice of any kind. It does not account for all factors that affect your actual mortgage costs, including but not limited to: your credit score and credit history, lender-specific fees and closing costs, private mortgage insurance (PMI) variations by lender, points, origination fees, discount fees, prepaid interest, escrow requirements, debt-to-income ratios, loan-to-value requirements, property appraisal values, local and state tax rates, homeowners association assessments, or changes in interest rates. Actual loan terms, rates, monthly payments, and total costs will vary based on your individual financial profile and the lender you work with.
Nothing on this page creates or implies a lender-borrower relationship, a financial advisory relationship, or any other professional relationship between you and us. You should not make any financial decisions based solely on the output of this calculator.
We strongly encourage you to contact us directly so we can walk you through accurate financials tailored to your specific situation. Our team can provide personalized guidance, connect you with qualified lending professionals, and help ensure you have the complete picture before making one of the most significant financial decisions of your life.
Disclaimer
This calculator is provided for general informational purposes only and may not constitute real or accurate financial information. Results are estimates based on the values entered and should not be relied upon for financial decisions.
How to interpret your results
Monthly Payment: Your fixed principal and interest payment for every month of the loan term. This is the core number for your household budget, but it does not include property taxes, homeowners insurance, PMI, or HOA fees. Ask your lender for a full monthly estimate before you finalize your budget.
Principal vs. Interest Breakdown: The donut chart shows what proportion of your total repayment goes toward owning your home versus paying the lender. In the early years of any mortgage, the majority of each payment is interest. This shifts over time, but slowly. See our Amortization Calculator for a month by month view of exactly how this plays out.
Factors that drive your monthly payment
Several variables determine what you will pay each month. Understanding how they interact gives you more control over your budget and your options.
Loan Amount and Down Payment: These two figures determine your principal. A larger down payment reduces your loan balance, your monthly payment, and in many cases your interest rate. Putting down less than 20 percent typically means paying private mortgage insurance (PMI) until you build enough equity, so it is worth weighing a larger down payment against keeping cash in reserve for moving costs, repairs, or an emergency fund.
Interest Rate: The cost of borrowing money, expressed as an annual percentage. Even small rate differences add up significantly over a loan term. On a $300,000 loan, the difference between a 6.5 percent and a 7.0 percent rate adds up to tens of thousands of dollars over 30 years, and changes your monthly payment by a meaningful amount. Always get quotes from multiple lenders before committing.
Loan Term: The length of your repayment period. A 30 year term produces lower monthly payments, which is why most first time buyers choose it. A 15 year term produces higher payments but far less total interest and faster equity growth. The right choice depends on how much monthly flexibility you need versus how quickly you want to own your home outright.
The Mortgage Formula
For those who want to understand what is happening under the hood:
M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1]
MMonthly payment
PLoan principal
rMonthly interest rate (annual rate divided by 12)
nTotal number of payments (years × 12)
This is a standard amortization formula. It ensures that every payment is equal in size while the internal split between principal and interest shifts over time — more interest early, more principal later.
How much should your mortgage payment be?
A useful starting point for primary residence buyers is the 28/36 rule — spend no more than 28% of gross monthly income on housing and no more than 36% on total debt obligations. For real estate investors, the more relevant benchmark is whether the property's rental income covers the mortgage and all operating expenses with enough margin remaining to justify the investment.
Debt Service Coverage Ratio (DSCR) is the metric lenders use to answer this question for investment properties. A DSCR of 1.0 means rental income exactly covers debt service. Most lenders require a minimum DSCR of 1.20 to 1.25, meaning rental income must exceed your mortgage payment by at least 20% to 25%. Understanding this threshold before you apply helps you structure deals that will qualify for financing.
Running scenarios before you commit
The most valuable use of this calculator is not calculating a single payment — it is stress-testing your assumptions before you make an offer. A few scenarios worth running on any Indianapolis deal:
Rate sensitivity — What happens to your monthly payment if rates move 0.5% higher before you close? On a $250,000 loan, that shift adds roughly $75 per month. Does the deal still cash flow?
Term comparison — What does your cash flow look like on a 15-year versus a 30-year loan? The payment difference is significant, but so is the long-term equity buildup. Know both numbers.
Loan amount at different down payments — What changes if you put 20% down versus 25%? The lower payment improves cash flow, but the additional capital deployed reduces your cash-on-cash return. This calculator makes that tradeoff visible.
Why this matters for Indianapolis
Indianapolis continues to attract investor capital from across the country due to its strong price-to-rent ratios, consistent rental demand, and relatively low property taxes compared to coastal markets. From entry-level rentals on the south and east sides of the city to higher-end single-family homes in Hamilton County suburbs like Fishers, Carmel, and Noblesville, the metro offers viable investment opportunities across a wide range of price points.
In this market, financing terms matter more than many investors initially appreciate. The difference between a 6.5% and 7.25% rate on a $275,000 loan is over $120 per month — which is often the difference between a deal that cash flows and one that does not. Running accurate mortgage numbers before you make an offer is one of the most fundamental disciplines of successful real estate investing.
Related calculators
Amortization Calculator: See your loan broken down payment by payment. Understand exactly how much of each monthly payment goes to principal versus interest, watch your balance decline over time, and find out the exact date your loan is paid off.
Cap Rate Calculator: Evaluate any Indianapolis rental property's income potential before factoring in financing. Enter your income and expenses to calculate net operating income and cap rate — the industry standard for comparing investment properties.
Rental Property Calculator: Run a complete deal analysis in one place. Combines your mortgage terms, rental income, and all operating expenses to give you monthly cash flow, cash-on-cash return, gross rent multiplier, and more.
Frequently Asked Questions
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Use current market rates as a planning figure, and add 0.5% to 0.75% above published primary residence rates to account for the investment property premium. This gives you a conservative estimate that will not produce deals that look better on paper than they perform in reality.
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This calculator is designed for fixed-rate loans. An ARM starts with a fixed introductory rate but adjusts periodically after that period ends. If you are evaluating an ARM, use the initial rate to calculate your starting payment, but be aware that your payment will change when the rate adjusts. For investment properties held long term, most experienced investors prefer the predictability of a fixed rate.
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A larger down payment reduces your loan amount and monthly payment, which improves cash flow. However, it also increases the total capital you have invested in the deal, which affects your cash-on-cash return. More cash down does not automatically mean a better return — it depends on how productively that capital is deployed. Run both scenarios in the Rental Property Calculator to see the full picture.
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Paying discount points upfront to reduce your interest rate can make sense if you plan to hold the property long enough to recoup the upfront cost through lower monthly payments. Divide the cost of the points by the monthly savings to calculate your breakeven period. If you plan to refinance or sell before that breakeven point, paying points is unlikely to be worthwhile.
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Pre-qualification is an informal estimate based on self-reported information. Pre-approval involves a formal application, credit check, and document verification — it carries significantly more weight with sellers and gives you a more reliable rate estimate for your calculations. If you are actively making offers in Indianapolis, pre-approval is worth completing before you start.
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