A KPI (key performance indicator) is a measurable value that shows how well a business, team or process is performing against an important objective. Good KPIs are few in number, clearly defined, tracked consistently over time and linked to decisions, such as cash conversion, gross margin, customer churn or on-time delivery.
What it means
Not every metric is a KPI. A KPI is one of the handful of measures that tell leadership whether the business is on track. Leading KPIs, such as sales pipeline, predict future results; lagging KPIs, such as revenue, confirm what has already happened.
Each KPI needs an owner, a precise definition, a data source, a target and a review frequency.
How it works in a UK business
Most SMEs track a dashboard of 8 to 15 company-level KPIs covering finance, customers, operations and people, reviewed in the weekly or monthly operating rhythm and included in the board pack. Functions then have their own supporting measures.
The common failure is tracking too many numbers with inconsistent definitions, so meetings argue about the data instead of acting on it.
Frequently asked questions
How many KPIs should a business track?
Most small and mid-sized businesses manage well with 8 to 15 company-level KPIs, with each director owning a few. Beyond that, attention spreads too thin. Teams can track more detailed operational metrics, but the board and leadership should focus on the measures that genuinely drive decisions.
What makes a good KPI?
A good KPI is clearly defined, measurable from reliable data, linked to a business objective, owned by a named person and reviewed regularly. It should change behaviour when it moves. If nobody would act differently whether the number rose or fell, it is probably a vanity metric rather than a KPI.
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Last updated: 5 November 2026