Payback period

Payback period is a financial term referring to the amount of time it takes for an investment to earn back the money spent on it. The term is used as a screening measure in capital budgeting; an investment with a shorter payback period is generally considered less risky because the initial investment is recovered more quickly. Determining an investment’s payback period is an important tool in business and financial budgeting. It is also often used to help determine cost savings before implementing “green” or energy-saving technology. Although it is an important and useful tool, it does not include all factors that affect investments. Therefore, calculating the payback period is often only the first step in deciding whether an investment is profitable.

Background

When annual cash inflows are constant, the payback period is calculated by dividing the initial investment by the annual cash inflow. For example, suppose that a pizza shop is considering purchasing a new oven. The new oven will allow the shop to make five thousand more pizzas a year and costs $30,000. If the pizza shop nets $3 per pizza, considering depreciation, taxes, and other costs, the payback period for the oven will be about two years.

This same process can be applied to many types of capital purchases. A capital purchase is something that will continue to have value for at least one year in the future, such as land or equipment. For example, a company may need to build an entire factory to either begin or increase production. In this case, the total project cost would be divided by the annual cash flow to determine the payback period. When annual cash flows vary, the payback period is determined by cumulatively adding each year’s cash inflow until the initial investment is fully recovered.

The payback period can also be a useful tool for companies and homeowners considering upgrading systems and appliances for energy efficiency. In this case, it is the annual savings that is used to calculate the payback period. For example, suppose that a homeowner plans to add insulation to the attic of their home at a cost of $1,500. The homeowner currently spends about $1,700 a year for oil heat for their home. It is estimated that the attic insulation will cut their annual heating costs by about 25 percent, yielding an annual savings of about $425. The payback period on the insulation is therefore about three-and-a-half years.

Overview

Companies and investors stay in business and grow by making careful investment choices. They use financial analysts to look into the cost and profit of each investment. Payback period is often used as an initial screening tool in their evaluation. It is frequently used alongside other capital budgeting methods, such as net present value (NPV) and internal rate of return (IRR), to provide a more comprehensive evaluation of an investment. 

Using payback period in this type of accounting has a number of benefits. For starters, it is very simple. The numbers needed to complete it are almost always readily available to the analyst, and the calculations are relatively easy. This makes determining the payback period a quick and efficient way to decide if something is even remotely profitable. It is also a good way to compare two or more similar options that may otherwise be difficult to compare. For example, if a company is trying to decide between two expansion plans, using payback period can provide valuable information for the decision process.

However, payback period has some disadvantages. It does not address the concept of time value of money (TVM). The value of money varies over time, so money made or saved by an investment may not be the same in the third year after the investment as it was in the first year. Additionally, the amount of money that will come in at different times during the capital investment’s lifespan may vary. For example, a factory making a new product may make less money when the product is introduced than a factory making an established product. However, this could reverse as the demand grows for the new product. The value of the cash inflows in each scenario varies because of TVM.

A variation known as the discounted payback period adjusts future cash flows to reflect the TVM before determining how long it takes to recover the initial investment.

Another factor not included in payback period is how much profit might be made after the payback period has ended. For example, the factory making the existing product may seem less profitable based on the payback period. However, if the product remains more popular after the payback period ends, it may end up being the more profitable choice.

The method also includes several assumptions that could affect the overall profitability of the investment. For example, if the pizza shop does not have enough customers to sell an additional five thousand pizzas a year, it will take longer for it to meet its payback period than originally expected. Likewise, if the cost of oil heat goes up or down, the homeowner may need less or more time to realize the anticipated savings and meet the expected payback period.

The payback period also fails to take into account the useful life of the investment. For example, the pizza shop owner using payback period to decide between a $20,000 oven and a $30,000 oven, where each still allows for making five thousand additional pizzas per year, might decide to choose the $20,000 because it would be paid off faster. However, that oven might have a projected lifespan that is less than the more expensive oven, which would mean that the shop would need another new oven sooner. This is not addressed by the payback period. The traditional payback period method also does not account for inflation, which can affect the real value of future cash flows.

Despite these drawbacks, payback period remains an important tool for business analysts. Its simplicity makes it easier to use and understand than more complex tools. It also helps determine how likely a project or an investment is to make money. Payback period also helps companies with cash-flow problems determine which investments are the most likely to prevent those problems from worsening.

Bibliography

Carlson, Rosemary. “Payback Period in Capital Budgeting.” Balance Small Business,13 Nov. 2019, www.thebalancesmb.com/payback-period-in-capital-budgeting-392916. Accessed 18 Nov. 2024.

Gallo, Amy. “A Refresher Course on Payback Method.” Harvard Business Review, 18 April 2016, hbr.org/2016/04/a-refresher-on-payback-method. Accessed 18 Nov. 2024.

Kagan, Julia. “Payback Period.” Investopedia, 20 May 2019, www.investopedia.com/terms/p/paybackperiod.asp. Accessed 18 Nov. 2024.

“Payback Method/Payback Period Formulas.” Accounting Tools, 6 Jul 2024. www.accountingtools.com/articles/2017/5/17/payback-method-payback-period-formula. Accessed 18 Nov. 2024.

“Payback Period.” Wall Street Prep, 5 Feb. 2024, www.wallstreetprep.com/knowledge/payback-period/. Accessed 18 Nov. 2024.

“Payback Period.” XPlained, xplaind.com/849768/payback-period. Accessed 18 Nov. 2024.

“Payback Period Analysis.” Penn State College of Earth and Mineral Sciences, www.e-education.psu.edu/eme460/node/682. Accessed 18 Nov. 2024.

“What Is a Payback Period?” Freshbooks, 12 June 2024. www.freshbooks.com/hub/accounting/payback-period. Accessed 18 Nov. 2024.

Woodruff, Jim. “Advantages & Disadvantages of Payback Capital Budgeting Method.” Small Business Chronicle, 4 Feb. 2019, smallbusiness.chron.com/advantages-disadvantages-payback-capital-budgeting-method-14206.html. Accessed 18 Nov. 2024.