Price Elasticity of Demand: How to Calculate and Apply It

Price Elasticity of Demand: What It Is and Why It Matters

Choosing the “perfect price” for a product or service is one of the most challenging decisions small to mid-sized businesses (SMBs) face. Pricing affects outcomes for your entire organization—from profitability to brand perception. Setting prices requires balancing internal costs with market conditions, customer demand, and competitor behaviors, and it’s never a one-and-done deal. These factors, particularly customer demand, are constantly changing, and you have to adjust pricing accordingly.

That’s why price elasticity of demand (PED)—a key performance indicator that measures how much demand for a product will be influenced by a change to that product’s price—can be a huge benefit.

Let’s break down how you can take advantage of PED by defining exactly what elastic and inelastic demand are, looking at an easy-to-use demand elasticity formula, and highlighting the importance of data visibility in PED.

What Is Price Elasticity: Elastic vs. Inelastic Demand

In simple terms, price elasticity is how much customer demand for a product will shrink or grow based on the product’s price. Elasticity is determined by the importance consumers attach to the product. For example, is the product something they want or need? Is it essential or nonessential?

If the product is something they need, such as medication, fuel, or staple food items, then price changes will have little impact on demand. These are essential purchases, so they are inelastic products with inelastic demand.

If the product is discretionary, such as a luxury item, and the price changes (e.g., due to factors like inflation, sale offers, limited inventory, etc.), then your customers may choose to wait or not purchase the product at all. Additionally, if the product they want is available somewhere else at a better price, they may choose not to purchase it from you. These are nonessential purchases, so they are elastic products. A change in price can easily change the quantity demanded.

Say you sell designer handbags. They’re beautifully crafted and offer your customers an accessory of superior quality, but, ultimately, they are not necessary to life. If you increase your prices, demand for your handbags will likely decrease.

Does this mean you can’t ever raise prices? Not at all! The demand elasticity formula can help you determine how elastic or inelastic your product is, and understanding price elasticity will help you make strategic pricing decisions for your specific needs.

Demand Elasticity Formula

The formula for calculating demand elasticity is simple:

Price Elasticity of Demand = Percentage Change in Quantity Demanded ÷ Percentage Change in Price

Using percentages to calculate a ratio can feel daunting, so let’s look at an example.

Your most popular handbags sell for $1,000 each, but, yesterday, you decided to raise your price to $1,200. This is a price change of 20%, and, because of it, the number of handbags your customers bought between yesterday and today has decreased by 33%.

The demand elasticity formula for this example is as follows:

33% ÷ 20% = 1.67

This tells us that your product is an elastic product.

The result of the price elasticity of demand formula can be interpreted like this:

• A Result Greater Than 1: The change in price prompts a meaningful change in demand, meaning the product is elastic.
• A Result Equal to 1: The change in price and the amount of demand align, meaning the product has achieved unitary elasticity (a ratio of 1:1).
• A Result Less Than 1: The change in price doesn’t result in significant change in demand, meaning the product is inelastic.

Arc Elasticity and Point Elasticity

Within PED, SMBs can rely on different elasticity measures depending on how big or small their price shifts are. For example, point elasticity can be used by businesses that make frequent small price adjustments as a way to test consumer behavior. Fiveable, an online education platform, puts it this way: “Point elasticity measures the responsiveness of quantity demanded or supplied to a change in price at a specific point on the demand or supply curve. It is crucial for understanding how small changes in price can affect quantity and is particularly useful when analyzing demand in a precise manner.”

Arc elasticity, on the other hand, measures bigger price changes using the average price and quantity, which helps with forecasting and long-term planning. Specifically, and according to Investopedia, the arc elasticity formula “calculates elasticity at the midpoint between two points on a demand curve” and “provides consistent results regardless of the direction of price change.”

Factors Affecting Price Elasticity in Real Markets

Price elasticity doesn’t happen in a bubble. There are factors that impact a product’s elasticity rating, such as whether that product is necessary vs. unnecessary. Unnecessary goods are those that customers can choose to buy (or not) at the price you set, while necessary goods, like medications or food, are essential for life and must be purchased, making the price point less relevant to demand.

Other PED factors, which are either controllable or determined by the market, include:

• Competition: A product that can be swapped out for another increases that product’s elasticity. An example would be if one brand of dish soap raises its prices and another brand of equal quality doesn’t, so the less expensive brand will win the consumer’s business.
• Duration and Urgency: How long a price change lasts and how badly a customer needs a product can affect elasticity. Limited-day sales may prompt buyers to buy now rather than later, making demand temporarily higher but not truly changing their shopping habits. However, a long-term price increase may cause the buyer to adapt by looking elsewhere for the products they need.
• Brand Attachment: In some cases, brand loyalty can override price sensitivity. Marketing your product as one-of-a-kind and providing excellent customer service can increase demand and help transform your elastic product into a more inelastic one.
• Budget Constraints: The price of your product compared to the size of your customers’ budgets will impact how much your price changes affect your customers. An expensive item that gets even more expensive could spike (or bottom out) demand, while a less costly product that goes up incrementally may not make a big difference either way.

Fixed Costs vs. Variable Costs

When setting prices for your products, alongside price elasticity of demand, you should also consider your operational expenses. These expenses are divided into fixed costs and variable costs.

Fixed costs remain constant regardless of a company’s profitability. They include salaries, rent, property taxes, and insurance. Variable costs change based on a company’s output and include labor, utility fees, and raw material purchases.

Understanding fixed costs vs. variable costs is important to knowing how much you should charge for your products. Fixed cost calculations will help you determine what production volume you need to turn a profit (e.g., higher fixed costs require a higher breakeven volume). Variable costs influence your per-unit expenditure, which must cover your fixed costs and generate a profit.

Whether high or low, both fixed and variable costs require you to be strategic in your price elasticity management.

Inflation and Price Elasticity

With inflation, prices of goods and services go up over time due to various factors, such as supply and demand imbalances, supply chain disruptions, and higher production costs. At the same time, consumers’ purchasing power drops while your operational costs rise.

Inflation heightens consumers’ price sensitivity, which can be signaled by increased switching to cheaper products, delayed purchases, smaller baskets, and higher responses to promotions. Measuring price elasticity during periods of inflation will help you determine which products can withstand price increases and which would likely lose sales if the price went up.

Why Data Visibility Matters

As a metric, price elasticity of demand will only serve your business well if you have access to trustworthy, real-time data to fuel your calculations. If your business is running on aging, disconnected systems, then your ability to gather, analyze, and utilize your siloed data is limited—and so is your ability to know how to set profitable prices.

This is not the case for ERP software users. ERP (enterprise resource planning) software is a centralized data repository that integrates all business management applications—from financial and inventory management to customer relationship management (CRM) and beyond—in a single, unified system. Cloud-based platforms, like Acumatica, deliver AI-driven visibility across your business, enabling you to use your data to make informed decisions. This, of course, includes the sales, price history, and item quantity data needed to calculate PED.

Conclusion: Key Takeaways for Decision-Makers

Price elasticity of demand is a key performance indicator that measures a product’s elasticity (e.g., how much demand for it will be affected by changes in its price). SMBs like yours can use this critical information to make wise pricing decisions.

With a comprehensive ERP system like Acumatica, you’ll have the data visibility and the advanced analytics, demand planning, inventory optimization, performance tracking, and pricing tools you need to make appropriate—and profitable—pricing changes. You’ll also be able to use your data to interpret the results of PED calculations, validate those interpretations, and monitor your decisions over time.

To learn more about how Acumatica empowers decision-makers to set that “perfect price,” contact our team today.