Capital budgeting

Capital budgeting is the disciplined process of identifying, forecasting and evaluating long-term investments. Major projects commit substantial cash under uncertainty, so the analysis converts expected costs, benefits and timing into comparable decision measures. Payback period, net present value and internal rate of return each illuminate a different aspect of the choice.

When to use it

• To decide whether a proposed long-term investment is expected to create value.
• To compare competing projects when capital, management attention or operating capacity is limited.
• To make the assumptions, risks and timing behind an investment case explicit.

Origins

The underlying comparison between resources committed now and benefits received later is ancient. Historian Fritz Heichelheim traced investment-like arrangements in food production to about 5,000 BC: seed, fruit or animals could be advanced for a fixed period and repaid from the later harvest or offspring. Bronze-Age Mesopotamian records include interest of one shekel a month for each mina owed—1/60th per month, or 20 per cent a year.

Formal present-value analysis developed much later through work on interest and investment, including Irving Fisher’s early twentieth-century treatment of intertemporal value. Modern corporate-finance practice then organised discounted cash flow, net present value and internal rate of return into the capital-budgeting toolkit. The methods are more sophisticated than ancient lending, but they retain the same time-value principle: cash available sooner is worth more than the same nominal amount received later.

What it is

Capital projects include purchasing or refurbishing equipment, building a factory and acquiring property for new locations. These expenditures create benefits over several periods, unlike day-to-day operating expenses consumed in the current period.

Capital budgeting estimates the incremental cash outflows and inflows caused by a project and evaluates their timing and risk. Three common measures are:

Payback period:

the time required for cumulative cash inflows to recover the initial investment.

Net present value (NPV):

the present value of all incremental cash inflows less the present value of all incremental cash outflows.

Internal rate of return (IRR):

the discount rate at which the project’s NPV equals zero.

All three consider recovery or return, but they do not answer the same question. Finance theory generally prefers NPV because it measures expected value added in currency terms and incorporates the time value of all forecast cash flows. Payback and IRR remain popular because their outputs are intuitive.