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Ed DiMarco's Custom Real Estate Investment Calculators

Advanced Mortgage Calculator: User Instructions

1. Starting the Calculator: Begin by navigating to the Advanced Mortgage Calculator section on the website.

2. Entering Basic Loan Information:


  • Loan Amount: Enter the total amount you plan to borrow or the principal amount of your mortgage.

  • Interest Rate: Provide the annual interest rate for your mortgage. This is usually specified in your loan agreement or mortgage offer.

  • Term (years): Indicate how long you plan to repay the loan, typically 15, 20, or 30 years.

3. Optional Details for a More Accurate Estimate: While the basic details above can provide a simple mortgage estimate, entering the following optional information can give you a more accurate monthly payment amount:


  • Property Taxes (annually): If you know the annual property taxes for the property, enter this value.

  • Homeowners Insurance (annually): Specify your annual insurance premium if you have the details.

  • HOA Fees (monthly): For properties in communities with Homeowners Association fees, input the monthly payment.

  • PMI Rate: If your down payment is less than 20% of the property's price, you may be required to pay Private Mortgage Insurance (PMI). Enter the PMI rate (as a percentage) if applicable.

4. Calculating Your Monthly Payment: Once you've filled out the required and any optional fields, click the "Calculate Monthly Payment" button. The calculator will then display an estimated monthly mortgage payment based on the information you provide.

5. Interpretation: The result reflects the total monthly payment you can expect to make, considering the principal, interest, and additional costs you've entered.

6. Adjust and Recalculate: Feel free to adjust the values and recalculate as often as needed to explore different scenarios or loan configurations.

Remember, while this calculator provides a comprehensive estimate, mortgage payments can vary based on additional factors and fees specific to your lender or loan type. Always consult with a mortgage professional or financial advisor for precise calculations.


Using the Detailed Income Producing Property Calculator

1. Starting with Basic Property Details:

  • Purchase Price: Enter the total price or value of the property.

  • Estimated Annual Rental Income: Provide an estimate of how much the property will earn in rental income over a year.

  • Additional Income: If the property has other income streams such as coin-operated laundry, parking fees, or storage unit rentals, specify the total estimated annual income from these sources.

2. Inputting Loan/Mortgage Information (if applicable):

  • Mortgage Amount: Specify the amount you're borrowing to buy this property.

  • Mortgage Rate: Enter the annual interest rate for your mortgage.

  • Mortgage Term: Indicate the duration of your loan in years, e.g., 15, 20, or 30 years.

3. Accounting for Additional Expenses:

  • Estimated Annual Expenses: Include anticipated yearly costs like utilities, property insurance, and property taxes.

  • Vacancy Rate: Estimate the percentage of the year the property might be unrented. For instance, if you expect it to be vacant one month a year, enter "8.33" (since 8.33% of 12 months is roughly one month).

  • Maintenance & Repairs: Provide an annual budget for regular property maintenance and unexpected repairs.

  • Capital Expenditures Reserve: Specify an annual amount reserved for major property repairs or improvements.

  • Management Fees: If a property management company will oversee the property, they usually charge a percentage of the rental income. Enter this percentage.

4. Considering Future Growth Rates:

  • Rent Growth Rate: If you anticipate the rent to increase annually, specify the expected percentage growth rate.

  • Expense Growth Rate: Inflation and other factors can lead to yearly expense increases. Estimate the percentage growth rate for expenses.

5. Calculating Your Metrics: After filling in all relevant fields, click the "Calculate" button. The calculator will process the data and display results, which include:

  • Net Annual Income: Your estimated earnings for the first year after accounting for expenses.

  • Net Monthly Income: Average monthly income for the first year.

  • Monthly Mortgage Payment: Your estimated monthly loan repayment amount.

  • Net Operating Income (NOI): Total annual income minus operating expenses.

  • Debt Service: Your total annual mortgage payments.

  • Cash Flow After Financing: NOI minus annual mortgage payments, showing your profit after all expenses.

  • Debt Coverage Ratio: This ratio indicates the property's ability to cover its debt obligations.

6. Analyzing Results:

  • Use the results to gauge the potential profitability of the property.

  • Compare different properties or financing scenarios by adjusting the values and recalculating.

7. Tips for Accurate Results:

  • Be as precise as possible with your input values. Making estimates as close to actual anticipated amounts will provide more accurate results.

  • Consult with Ed DiMarco, to help with some metrics or values.

With these detailed instructions, end users should find it easier to navigate and use the calculator effectively to get insights into their property investment decisions.

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