What is the difference between (not-yet-acquired) vs. (already-acquired), and why are these presented this way?

(not-yet-acquired) is a property that you anticipate purchasing or that you are considering buying.  

(already-acquired) is a property that you have been utilizing for a period of time, and hence you already own it.

There are several reasons why I separate these circumstances into two separate calculators for forecast-type calculators. One of the obvious reasons should become apparent by comparing the two "Input Your Variables" pages (see below examples). The input information requested for mortgage information for (already-acquired) requires one additional input variable, "Remaining Balance."

second and first mortgage input display for a not yet aquired property calculator

In the case of (already-acquired), your mortgage has already been amortizing since you purchased the property, and the balance currently due on your mortgage today does NOT equal its original balance. Therefore, I required the initial balance and original mortgage terms to calculate the monthly payment so that I can apply your monthly payment amount in amortizing any remaining balance and thus create an accurate forecast from "Today"!   

second and first mortgage input display for a already aquired property calculator

For rental property, I need to separate "not-yet-acquired" from "already acquired" for the above reasons concerning loan amortization and make certain adjustments for accumulated depreciation.

Rental property that is "not-yet-acquired" can begin the depreciation process "Today" without concern for any prior years' depreciation, simply because "property that has not yet been acquired" would have no prior year's depreciation.  

Rental property "already acquired" has already started the depreciation process in prior years. Hence, you need to input any prior year's accumulated depreciation so that it can be added to future estimated depreciation and thus create an accurate forecast from "Today"! 

current value and purchase price input display for a real estate calculator

Mortgage Refinancing Calculator Example:

Refinancing your mortgage? Try this simple mortgage calculator comparing cash flows: Compare (Old) Mortgage To (New) Mortgage.  You can indicate an early payoff if you plan on selling your home before the mortgage is fully amortized.  If you would like to consider present value, try: Compare (Old) Loan To (New) Loan Using Present Value.

Free calculator displaing an amortization schedule and helping homeowners understand the amount of money they will save by refinance there mortgage.

Real Estate-Calc.com Disclaimer: The calculators on this website are not intended to be a substitution for seeking professional legal, professional tax, and professional financial advice. In all circumstances, it is solely up to the user to determine input values. Changing the input values can materially alter the financial results of these calculators and these calculators are not designed to be an accurate accounting of a business. We can not guarantee the accuracy of these calculators. Because of the possibility of output and input errors, it is the user's responsibility to verify that all of the output and resulting calculations are correct. These calculators should not be used by anyone to make material financial decisions and should solely be used for informational purposes only. Users should form their own conclusions and are encouraged to seek professional advisement from all of the following: 1) a lawyer, 2) a tax specialist, and 3) a financial planner.