Time Value of Money (Part - 3) CA CPT Notes | EduRev

Business Mathematics and Logical Reasoning & Statistics

Created by: Sushil Kumar

CA CPT : Time Value of Money (Part - 3) CA CPT Notes | EduRev

The document Time Value of Money (Part - 3) CA CPT Notes | EduRev is a part of the CA CPT Course Business Mathematics and Logical Reasoning & Statistics.
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Perpetuity is an annuity in which the periodic payments or receipts begin on a fixed date and continue indefinitely or perpetually. Fixed coupon payments on permanently invested

(irredeemable) sums of money are prime examples of perpetuities.

The formula for evaluating perpetuity is relatively straight forward. Two points which are

important to understand in this regard are:.

(a) The value of the perpetuity is finite because receipts that are anticipated far in the future have extremely low present value (today’s value of the future cash flows).

(b) Additionally, because the principal is never repaid, there is no present value for the


Therefore, the price of perpetuity is simply the coupon amount over the appropriate discount rate or yield.

4.11.1 Calculation of multi period perpetuity:

The formula for determining the present value of multi-period perpetuity is as follows:
Time Value of Money (Part - 3) CA CPT Notes | EduRev


R = the payment or receipt each period

i = the interest rate per payment or receipt period

Example 41: Ramesh wants to retire and receive ₹ 3,000 a month. He wants to pass this

monthly payment to future generations after his death. He can earn an interest of 8%

compounded annually. How much will he need to set aside to achieve his perpetuity goal?


R = ₹3,000

i = 0.08/12 or 0.00667

Substituting these values in the above formula, we get
Time Value of Money (Part - 3) CA CPT Notes | EduRev

If he wanted the payments to start today, he must increase the size of the funds to handle the first payment. This is achieved by depositing ₹ 4,52,775 (PV of normal perpetuity + perpetuity received in the beginning = 4,49,775 + 3,000) which provides the immediate payment of ₹3,000 and leaves ₹4,49,775 in the fund to provide the future ₹3,000 payments.

4.11.2 Calculation of Growing Perpetuity:

A stream of cash flows that grows at a constant rate forever is known as growing perpetuity.

The formula for determining the present value of growing perpetuity is as follows:
Time Value of Money (Part - 3) CA CPT Notes | EduRev

Example 42: Assuming that the discount rate is 7% per annum, how much would you pay to receive ₹50, growing at 5%, annually, forever?

Time Value of Money (Part - 3) CA CPT Notes | EduRev
Calculating Rate of Return:

1) Calculating the rate of return provides important information that can be used for future

investments. For example, if you invested in a stock that showed a substantial gain after

several months of performance, you may decide to purchase more of that stock. If the

stock showed a continual loss, it may be wise to conduct research to find a better-performing stock.

2) calculating the rate of return is that it allows you to gauge your investment and decision making skills. Investments that create a gain or profit are great. However, if you continually make investments at a loss, then you may want to change your investment strategies. A great attribute of successful business people is knowing how and when to make investments, as is knowing when to change strategies. With a firm grasp of calculating the rate of return, you can manage and monitor your investments at various stages to determine the outcome of your investments. This leads to a higher level of confidence and the skills necessary to be a savvy investor.

Net Present Value Technique (NPV): The net present value technique is a discounted cash flow method that considers the time value of money in evaluating capital investments. An investment has cash flows throughout its life, and it is assumed that a rupee of cash flow in the early years of an investment is worth more than a rupee of cash flow in a later year.

The net present value method uses a specified discount rate to bring all subsequent net cash inflows after the initial investment to their present values (the time of the initial investment is year 0).

Determining Discount Rate
Theoretically, the discount rate or desired rate of return on an investment is the rate of return the firm would have earned by investing the same funds in the best available alternative investment that has the same risk. Determining the best alternative opportunity available is difficult in practical terms so rather that using the true opportunity cost, organizations often use an alternative measure for the desired rate of return. An organization may establish a minimum rate of return that all capital projects must meet; this minimum could be based on an industry average or the cost of other investment opportunities. Many organizations choose to use the overall cost of capital or Weighted Average Cost of Capital (WACC) that an organization has incurred in raising funds or expects to incur in raising the funds needed for an investment.

The net present value of a project is the amount, in current value of rupees, the investment

earns after paying cost of capital in each period.


Net present value = Present value of net cash inflow – Total net initial investment

Since it might be possible that some additional investment may also be required during the life time of the project then appropriate formula shall be:

Net present value = Present value of cash inflow – Present value of cash outflow

The steps to calculating net present value are:-

1. Determine the net cash inflow in each year of the investment.

2. Select the desired rate of return or discounting rate or Weighted Average Cost of Capital.

3. Find the discount factor for each year based on the desired rate of return selected.

4. Determine the present values of the net cash flows by multiplying the cash flows by

respective the discount factors of respective period called Present Value (PV) of Cash


5. Total the amounts of all PVs of Cash Flows

Decision Rule:

If NPV ≥ 0 Accept the Proposal

If NPV ≤ 0 Reject the Proposal

Example 43: Compute the net present value for a project with a net investment of

₹1,00,000 and net cash flows year one is ₹55,000; for year two is ₹80,000 and for year

three is ₹15,000. Further, the company’s cost of capital is 10%?

[PVIF @ 10% for three years are 0.909, 0.826 and 0.751]


YearNet Cash Flows
PVIF @ 10%
Discounted Cash Flows
Net Present Value27340

Recommendation: Since the net present value of the project is positive, the company should accept the project.


The nominal rate is the stated interest rate. If a bank pays 5% annually on a savings account, then 5% is the nominal interest rate. So if you deposit ₹ 100 for 1 year, you will receive ₹5 in interest. However, that ₹ 5 will probably be worth less at the end of the year than it would have been at the beginning. This is because inflation lowers the value of money. As goods, services, and assets, such as real estate, rise in price.

The nominal interest rate is conceptually the simplest type of interest rate. It is quite simply the stated interest rate of a given bond or loan. It is also defined as a stated interest rate. This interest works according to the simple interest and does not take into account the compounding periods.

Real Rate of Return: The real interest rate is so named because it states the “real” rate that

the lender or investor receives after inflation is factored in; that is, the interest rate that exceeds the inflation rate.

A comparison of real and nominal interest rates can therefore be summed up in this equation:

Nominal Rate of Return – Inflation = Real Rate of Return

Nominal Interest Rate = Real Interest Rate + Inflation

Effective Rate:

It is the actual equivalent annual rate of interest at which an investment grows in value when interest is credited more often than once a year. If interest is paid m times in a year it can be found by calculating:
Time Value of Money (Part - 3) CA CPT Notes | EduRev

The chief advantage to knowing the difference between nominal, real and effective rates is

that it allows consumers to make better decisions about their loans and investments. A loan with frequent compounding periods will be more expensive than one that compounds annually 

A bond that only pays a 1% real interest rate may not be worth investors’ time if they seek to grow their assets over time. These rates effectively reveal the true return that will be posted by a fixed-income investment and the true cost of borrowing for an individual or business. Effective and nominal interest rates allow banks to use the number that looks most advantageous to the consumer. When banks are charging interest, they advertise the nominal rate, which is lower and does not reflect how much interest the consumer would owe on the balance after a full year of compounding. On the other hand, with deposit accounts where banks are paying interest, they generally advertise the effective rate because it is higher than the nominal rate.


Compounded Annual Growth Rate (CAGR) is a business and investing specific term for the

smoothed annualized gain of an investment over a given time periodic is not an accounting term, but remains widely used, particularly in growth industries or to compare the growth rates of two investments because CAGR dampens the effect of volatility of periodic returns that can render arithmetic means irrelevant. CAGR is often used to describe the growth over a period of time of some element of the business, for example revenue, units delivered, registered users, etc.
Time Value of Money (Part - 3) CA CPT Notes | EduRev

Where V(t0 ) = Beginning Period ; V( tn ) = End Period

Example: Suppose the revenues of a company for four years, V(t) in the above formula, have been


Calculate Compound annual Growth Rate.


tn -t0 = 2016 - 2013 = 3

The CAGR revenues over the three-year period from the end of 2013 to the end of 20016 is CAGR (0, 3) Time Value of Money (Part - 3) CA CPT Notes | EduRev

Applications: These are some of the common CAGR applications:

  • Calculating average returns of investment funds.
  • Demonstrating and comparing the performance of investment advisors.
  • Comparing the historical returns of stocks with bonds or with a savings account.
  • Forecasting future values based on the CAGR of a data series.
  • Analyzing and communicating the behavior, over a series of years, of different business measures such as sales, market share, costs, customer satisfaction, and performance.


  • Time value of money: Time value of money means that the value of a unity of money is different in different time periods. The sum of money received in future is less valuable than it is today. In other words the present worth of money received after some time will be less than a money received today.
  • Interest: Interest is the price paid by a borrower for the use of a lender’s money. If you borrow (or lend) some money from (or to) a person for a particular period you would pay (or receive) more money than your initial borrowing (or lending).
  • Simple interest: is the interest computed on the principal for the entire period of borrowing.

I = Pit

A = P + I

I = A – P

Here, A = Accumulated amount (final value of an investment)

P = Principal (initial value of an investment)

i = Annual interest rate in decimal.

I = Amount of Interest

t = Time in years

Compound interest as the interest that accrues when earnings for each specified period

of time added to the principal thus increasing the principal base on which subsequent

interest is computed.

Formula for compound interest:

An = P ( 1 + i)n

where, i = Annual rate of interest

n = Number of conversion periods per year

Interest = An – P = P ( 1 + i )n – P

n is total conversions i.e. t x no. of conversions per year

Effective Rate of Interest: The effective interest rate can be computed directly by

following formula:
E = (1 + i)n– 1

Where E is the effective interest rate

i = actual interest rate in decimal

n = number of conversion period

⇒ Future value of a single cash flow can be computed by above formula. Replace A by

future value (F) and P by single cash flow (C.F.) therefore

F = C.F. (1 + i)n

⇒ Annuity can be defined as a sequence of periodic payments (or receipts) regularly over

a specified period of time.

Annuity may be of two types:

(i) Annuity regular: In annuity regular first payment/receipt takes place at the end of

first period.

(ii) Annuity Due or Annuity Immediate: When the first receipt or payment is made today

(at the beginning of the annuity) it is called annuity due or annuity immediate.

⇒ If A be the periodic payments, the future value A(n, i) of the annuity is given by
Time Value of Money (Part - 3) CA CPT Notes | EduRev

⇒Future value of an Annuity due/Annuity immediate = Future value of annuity regular

x (1+i) where i is the interest rate in decimal.

⇒ The present value P of the amount An due at the end of n period at the rate of i per

interest period may be obtained by solving for P the below given equation
Time Value of Money (Part - 3) CA CPT Notes | EduRev

Present value of annuity due or annuity immediate: Present value of annuity due/immediate for n years is the same as an annuity regular for (n-1) years plus an initial

receipt or payment in beginning of the period. Calculating the present value of annuity

due involves two steps.

Step 1: Compute the present value of annuity as if it were a annuity regular for one

period short.

Step 2: Add initial cash payment/receipt to the step 1 value.

 Sinking Fund: It is the fund credited for a specified purpose by way of sequence of

periodic payments over a time period at a specified interest rate. Interest is compounded

at the end of every period. Sizeof the sinking fund deposit is computed from A = P.A(n,

i) where A is the amount to be saved the periodic payment, n the payment period

Annuity applications:

(a) Leasing: Leasing is a financial arrangement under which the owner of the asset

(lessor) allows the user of the asset (lessee) to use the asset for a defined period of

time (lease period) for a consideration (lease rental) payable over a given period of

time. This is a kind of taking an asset on rent.

(b) Capital Expenditure (investment decision): Capital expenditure means purchasing  an asset (which results in outflows of money) today in anticipation of benefits (cash inflow) which would flow across the life of the investment.

(c) Valuation of Bond: A bond is a debt security in which the issuer owes the holder a

debt and is obliged to repay the principal and interest. Bonds are generally issued for

a fixed term longer than one year.

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