The fastest way to understand what a KPI is isn’t a definition — it’s seeing a pile of good ones and noticing what they have in common. So this article is mostly a list. But first, the thirty-second version of the concept, and one rule that separates a useful KPI from a number that just looks busy.
A real KPI moves only if the business is truly healthier — Hover any part for detail.
What makes something a KPI
A KPI (Key Performance Indicator) is a metric you monitor continuously to know whether something is performing well. Unlike a one-off goal, a KPI has no end date — you’ll always care about it — and it usually comes with a target or healthy range. If revenue, churn, or uptime are the vital signs of a business, KPIs are the gauges you keep your eye on.
The one rule worth remembering: a good KPI is specific, has a target, and is hard to game. “Website visits” is weak (it rises even if none of those visitors buy). “Visitor-to-signup conversion rate” is strong (it only improves if the site actually works better). More on that trap at the end.
Sales KPIs
- Revenue (monthly / quarterly) — the headline number.
- Sales pipeline value — total value of open opportunities.
- Win rate — % of deals won out of those pursued.
- Average deal size — revenue per closed deal.
- Sales cycle length — average days from first contact to closed deal.
- Quota attainment — % of reps hitting their targets.
Marketing KPIs
- Cost per lead (CPL) — marketing spend ÷ leads generated.
- Customer acquisition cost (CAC) — total cost to acquire one paying customer.
- Conversion rate — % of visitors (or leads) who take the desired action.
- Marketing qualified leads (MQLs) — leads good enough to pass to sales.
- Return on ad spend (ROAS) — revenue generated per dollar of ad spend.
Finance KPIs
- Gross margin and operating margin — profitability at different levels (see Gross Margin vs Operating Margin).
- Net profit margin — the true bottom line as a % of revenue.
- Cash flow / runway — how much cash, and how long it lasts.
- Budget variance — actual spend vs budgeted spend.
- Accounts receivable days (DSO) — how long customers take to pay.
Operations & manufacturing KPIs
- OEE (Overall Equipment Effectiveness) — the master efficiency number for a production line.
- On-time delivery (OTD) — % of orders shipped by the promised date.
- Scrap / defect rate — % of output that fails quality.
- Cycle time / throughput — how fast units move through the process.
- Inventory turns — how quickly stock is used and replaced.
(For a deeper operations set, see KPIs vs OKRs for Manufacturing.)
Customer success & support KPIs
- Customer churn rate — % of customers lost in a period.
- Net revenue retention (NRR) — revenue kept and expanded from existing customers.
- CSAT (Customer Satisfaction) — satisfaction score from surveys.
- NPS (Net Promoter Score) — how likely customers are to recommend you.
- First response time and average resolution time — support speed.
HR & people KPIs
- Employee turnover rate — % of staff who leave.
- Time to hire — average days to fill an open role.
- Employee engagement score — from surveys.
- Absenteeism rate — unplanned time off.
- Training completion rate — % of staff completing required learning.
The vanity metric trap
Not every number that goes up is a KPI worth tracking. Vanity metrics look impressive but don’t connect to a real outcome:
| Vanity metric | Better KPI |
|---|---|
| Total page views | Visitor-to-signup conversion rate |
| Social media followers | Engagement or referral revenue |
| Total registered users | Monthly active users |
| Emails sent | Click-through and reply rate |
| Total leads | Qualified leads that convert |
The test for a real KPI: if this number improved, would the business actually be healthier? If a metric can climb while nothing meaningful gets better, it’s vanity. Our data literacy course has a whole module on catching these.
From KPI to action
A KPI on its own just tells you the current state. When a KPI drifts off target, that’s often the trigger to set an OKR — a time-boxed goal to actively move it. That relationship (KPIs monitor, OKRs push for change) is worth understanding on its own; see KPIs vs OKRs and OKR Examples. The KPIs vs OKRs module ties the two together.
How to use the term
- “Churn is one of our core KPIs — we review it weekly.” (ongoing health)
- “That’s a vanity metric — followers don’t pay the bills. What’s the conversion rate?” (the skeptic)
- “Pick three KPIs per team, not thirty — a dashboard nobody reads isn’t a dashboard.” (focus)
Start with a small set of KPIs that genuinely reflect health, give each a target, and resist the urge to measure everything. A few honest gauges beat a wall of numbers every time.
Related reading: OKR Examples · KPIs vs OKRs · KPIs vs OKRs for Manufacturing