Math Problem Statement

solve A deferred annuity is set up that will pay $2000 at the end of each month for 5 years at 6% annual interest rate, compounded monthly. The annuity is deferred for 2 years rst. What lump sum should you put in the account now? 10

Solution

To solve for the lump sum needed to fund the deferred annuity, we'll use the concept of the present value of an annuity.

Key Information:

  • Monthly payment (PMT): $2000
  • Number of payments (n): 5 years × 12 months = 60 payments
  • Annual interest rate (r): 6% (compounded monthly, so 6%12=0.5%\frac{6\%}{12} = 0.5\% monthly interest rate)
  • Interest rate per period (i): 0.005 (monthly interest rate)
  • Deferred period: 2 years (24 months)
  • Formula to use: The present value of an annuity due formula and the concept of deferral.

Solution Steps:

  1. Present value of the annuity: The formula for the present value of an annuity is:

    PV=PMT×1(1+i)niPV = PMT \times \frac{1 - (1 + i)^{-n}}{i}

    where:

    • PMT=2000PMT = 2000 is the monthly payment,
    • i=0.005i = 0.005 is the monthly interest rate,
    • n=60n = 60 is the total number of payments (5 years × 12 months).
  2. Deferral period: Since the annuity is deferred for 2 years, we need to calculate the present value of the annuity at the start of the 5-year period, then discount that value back 2 years to the present.

  3. Discount the present value back by the deferral period: Once the present value of the annuity at the start of the 5-year period is calculated, it must be discounted for the 2-year deferral.

Let me calculate it for you.The lump sum that you need to invest now to fund the deferred annuity is approximately $91,780.35.

Would you like a more detailed breakdown or have any questions?

Here are 5 related questions to deepen your understanding:

  1. How does the interest rate affect the present value of an annuity?
  2. What would happen if the deferral period was extended to 3 years?
  3. How is the formula for the present value of an annuity derived?
  4. What would be the lump sum if the interest rate were 8% instead of 6%?
  5. How can the monthly payment amount be adjusted to match a different lump sum?

Tip: When working with deferred annuities, always account for the deferral period by discounting the present value accordingly.

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Math Problem Analysis

Mathematical Concepts

Annuities
Present Value
Interest Rates
Time Value of Money

Formulas

Present Value of an Annuity: PV = PMT × (1 - (1 + i)^-n) / i
Discounting Future Value: PV = FV / (1 + i)^t

Theorems

Time Value of Money
Discounting Principle

Suitable Grade Level

College/University Level - Finance, Actuarial Science