How much would the payoff be if I only had 12 years left on a 30 year mortgage of $530,493 with monthly payments o $3,180.57

To calculate the remaining payoff amount on a 30-year mortgage with 12 years remaining, you would need to know the interest rate of the mortgage loan. The interest rate plays a significant role in determining the total payout.

Once you have the interest rate, you can input the values into a mortgage calculator or use a spreadsheet software like Microsoft Excel to calculate the remaining mortgage balance.

Here are the steps to calculate the payoff amount:

1. Determine the monthly interest rate: Divide the annual interest rate by 12 to get the monthly interest rate. For example, if the annual interest rate is 4%, the monthly interest rate would be 4% / 12 = 0.0033333 (rounded to 6 decimal places).

2. Calculate the remaining number of months: Multiply the number of years remaining (12 in this case) by 12 to get the remaining number of months. In this example, it would be 12 years * 12 months/year = 144 months.

3. Use the monthly interest rate and number of remaining months to calculate the remaining mortgage balance: There are various formulas to calculate mortgage balance, but a commonly used one is the mortgage amortization formula:

Remaining Mortgage Balance = P * [(1 + r) ^ n] - [(1 + r) ^ t - 1] / r

Where:
- P is the original loan amount ($530,493)
- r is the monthly interest rate (0.0033333)
- n is the total number of payments (360 for a 30-year mortgage)
- t is the number of payments made (216 for a 24-year mortgage)

4. Once you input the values in the formula and make the calculations, you will find the remaining mortgage balance. This will be the amount of the payoff.

It's important to note that the formula above assumes the original mortgage term was for the full 30 years and no additional principal payments were made along the way. If the mortgage has been prepaid or if any extra payments were made during the 18 years, you would have to adjust the formula accordingly to calculate the remaining balance accurately.