To find the present value of a perpetuity where the first payment is received in the future, we need to break it down into two steps:
- Calculate the present value of the perpetuity as of the first payment date
- Calculate the present value of that amount to today's date
Step 1: Calculate the Present Value of the Perpetuity
A perpetuity is valued using the formula:
\[ PV_{t} = \frac{PMT}{i} \]
Where:
- \( PMT \) = payment per period ($1,644.00)
- \( i \) = interest rate (11% or 0.11)
Using this, we can calculate the present value at the time the first payment is received, which is 8 years from now.
\[ PV_{t} = \frac{1644}{0.11} = 14945.45 \]
Here, \( PV_{t} \) is the value of the perpetuity at Year 8.
Step 2: Calculate the Present Value Today
Now, we need to find the present value of \( PV_{t} \) as of today.
The formula to calculate the present value from a future value is:
\[ PV = \frac{FV}{(1 + r)^n} \]
Where:
- \( FV = 14,945.45 \) (the perpetuity value we just calculated)
- \( r = 0.11 \) (the discount rate)
- \( n = 8 \) (the number of years until the first payment is received)
So, we calculate:
\[ PV = \frac{14945.45}{(1 + 0.11)^8} \]
Calculating \( (1 + 0.11)^8 \):
\[ (1.11)^8 \approx 2.3996 \]
Now plug this into the present value formula:
\[ PV = \frac{14945.45}{2.3996} \approx 6226.55 \]
Thus, the present value today of receiving $1,644.00 per year forever starting 8 years from now, assuming a discount rate of 11%, is approximately $6,226.55.
Inputting Values on a Finance Calculator:
For the finance calculator, enter the following values:
For the first calculation (Step 1):
- \( PMT = 1644 \)
- \( i/y = 11 \) (which reflects a 11% interest rate)
- ( N = \text{not needed, since it's a perpetuity)**
- \( FV = 0 \) (because we are calculating the present value)
- \( PV = \text{what you would solve for as } 14945.45 \text{ (after entering percent rate)} \)
For the second calculation (Step 2):
- \( PMT = 0 \) (no payments to be received)
- \( i/y = 11 \)
- \( N = 8 \)
- \( FV = 14945.45 \) (the calculated perpetuity value)
- \( PV = \text{what you would solve for as approximately } 6226.55 \)
With these inputs, you can find both the value of the perpetuity starting in the future and its equivalent present value as of today.