“You can't manage what you don't measure.” Key performance indicators — KPIs — are the specific, measurable numbers a business tracks to see whether it's hitting its goals. They turn vague hopes into concrete targets a team can actually aim at.
What a KPI Is
A key performance indicator is a measurable value that shows how well a business is achieving an important objective. The word “key” matters — a business could measure a thousand things, but KPIs are the few numbers that actually reflect whether it's succeeding at what counts.
Examples of KPIs
KPIs vary by business and goal, but common ones include revenue growth, profit margin, customer retention rate, sales per employee, website conversion rate, average order value, and on-time delivery rate. A coffee shop might track daily sales and repeat customers; an app might track active users and subscription conversions.
What Makes a Good KPI
A good KPI is tied to a real goal, is measurable, and is actionable — meaning the business can actually do something in response to it. Beware “vanity metrics” that look impressive (like total social-media followers) but don't drive real decisions. The best KPIs tell you what to change.
Using KPIs to Manage
Businesses set target values for their KPIs, track them over time, and use the trends to spot problems early and decide what to adjust. For example, a fitness studio might watch two KPIs — member retention and class capacity utilization — and use them to decide whether to add classes and an app before opening a costly second location. KPIs turned a gut feeling into an evidence-based decision.
Leading vs. Lagging Indicators
Some KPIs are lagging — they report results after the fact, like last quarter's profit. Others are leading — they hint at future results, like the number of sales leads in the pipeline. Watching both lets a business see where it's been and where it's headed.
Key Takeaways
- A KPI is a measurable value showing progress toward a key objective.
- Common KPIs: revenue growth, profit margin, retention, conversion, on-time delivery.
- Good KPIs are tied to goals, measurable, and actionable — not vanity metrics.
- Businesses set targets, track KPIs over time, and use them to make decisions.
Check Your Understanding: KPIs: Key Performance Indicators
Five practice questions on KPIs: Key Performance Indicators. Tap an answer to see whether you're right and why each choice is right or wrong.
1. Brightside Tutoring's main goals are to raise students' test scores and to get families to sign up again each term. Which number is most likely a vanity metric for Brightside?
Answer: B. Likes can look impressive, but they don't show whether students are improving or families are coming back, and they don't tell Brightside what to change.
Why the other choices are wrong:
- A. Re-enrollment rate is tied directly to one of Brightside's stated goals and shows whether families are satisfied, so it is a useful KPI.
- C. Score gains measure the main goal of tutoring and can guide changes to lessons, so this is a strong, actionable KPI.
- D. This is a conversion rate. It shows how well free sessions turn into paying customers, which Brightside can act on, so it isn't a vanity metric.
2. Pebble & Pine sells candles online. In March its website had 12,000 visits, 360 orders, and $14,400 in revenue. What was its website conversion rate (the percentage of visits that ended in an order)?
Answer: C. Conversion rate = orders ÷ visits = 360 ÷ 12,000 = 0.03, which is 3%.
Why the other choices are wrong:
- A. 360 ÷ 12,000 = 0.03, but that decimal has to be multiplied by 100 to become a percentage. 0.03 equals 3%, not 0.03%.
- B. This divides revenue by visits ($14,400 ÷ 12,000 = $1.20), which is revenue per visit, not the share of visits that became orders.
- D. This flips the ratio (12,000 ÷ 360 = 33.3). Conversion rate puts orders on top and visits on the bottom.
3. Crunch Crate, a snack-subscription company, started the quarter with 400 subscribers. During the quarter it gained 120 new subscribers, none of whom canceled, and it ended the quarter with 440. Its retention rate is the percentage of starting subscribers who were still subscribed at the end. What was its retention rate?
Answer: C. Of the 440 at the end, 120 were new, so 440 − 120 = 320 starting subscribers stayed. 320 ÷ 400 = 0.80, or 80%.
Why the other choices are wrong:
- A. 20% is the share of starting subscribers who canceled (80 ÷ 400). That is the loss rate, the opposite of retention.
- B. This divides the 320 subscribers who stayed by the 440 at the end. Retention uses the starting count, 400, as the base: 320 ÷ 400.
- D. 440 ÷ 400 = 110% counts the 120 new subscribers as if they had been kept. Retention only looks at the subscribers who were there at the start.
4. Copperline Climbing Gym tracks three KPIs each month (targets in parentheses):
• New members (40): Jan 38, Feb 45, Mar 52
• Member retention rate (90%): Jan 91%, Feb 86%, Mar 81%
• Class capacity used (75%): Jan 74%, Feb 76%, Mar 78%
Which conclusion is best supported by the data?
Answer: A. New members climbed above target, but retention fell every month, from 91% to 81%, ending 9 points below its 90% target. More people are joining while more existing members leave.
Why the other choices are wrong:
- B. This looks at one good KPI and ignores falling retention. Expanding before finding out why members are leaving could be a costly mistake.
- C. KPIs are tracked over time to spot trends. Retention started above target in January but dropped every month and ended 9 points below it.
- D. Capacity used ended at 78%, which is 3 points above its 75% target. Retention, at 81% against a 90% target, is the furthest off.
5. Daniela runs FreshFork, a meal-kit company. Each week she tracks how many people sign up for a free trial box. Why is this number considered a leading indicator?
Answer: D. Trial sign-ups happen before people become paying subscribers, so they signal future sales. That early warning is what makes a KPI a leading indicator.
Why the other choices are wrong:
- A. Reporting results after the fact describes a lagging indicator, like last quarter's profit. Trial sign-ups happen before customers start paying.
- B. "Leading" refers to timing, not to the company's leaders. A leading indicator gives an early signal about future results.
- C. A leading indicator isn't defined by how important it is. It is defined by giving an early hint about results that haven't happened yet.
Keep Studying
Related: SWOT Analysis, Motivation.
These guides are educational and written for the AP Business with Personal Finance course. They explain concepts in simplified terms for study purposes.