Marketing KPIs: Definitions, Formulas, and Examples
Marketing KPIs are key performance indicators used to measure progress toward marketing and business goals. They can track brand awareness, customer acquisition, revenue, or retention. A metric becomes a KPI when it is selected to judge a specific objective; other measurements provide context. Microsoft’s KPI guidance makes the objective the starting point for choosing indicators.
The choice depends on the result being measured. Awareness, leads, purchases, and retained customers require different indicators. Use the goal table to select the outcome, then the formulas to define its measurement.
Match marketing KPIs to the business goal
The following pairings are a practical starting point. Select the outcome that matches the objective and use the supporting measures to investigate performance.
| Business goal | Outcome to prioritize | Supporting measures |
|---|---|---|
| Increase brand awareness or consideration | Awareness, recall, or consideration lift measured through audience surveys | Reach, impressions, and frequency |
| Generate suitable leads | Qualified lead count, cost per qualified lead, and subsequent customer conversion; lead quality matters alongside cost | Form conversions, total leads, and campaign spend |
| Acquire customers efficiently | New customers and customer acquisition cost | Conversion rate and lead-to-customer rate |
| Improve return from marketing | A return measure with explicit revenue or profit and cost definitions | Attributed revenue, ROAS, and acquisition cost |
| Keep existing customers | Customer retention rate | Customer lifetime value and results for the same customer group over time |
Choose a primary outcome for each objective. Keep exposure, response, cost, and customer results separately labeled in the report so their role remains clear.
13 marketing KPI examples and formulas
Percentage formulas below multiply the ratio by 100. Cost measures use the same currency throughout. The definitions identify the relevant reporting system where a platform-specific convention matters.
| KPI | Definition or formula | Measurement purpose |
|---|---|---|
| Unique reach | Number of distinct people shown an ad under the platform’s measurement rules (Google Ads definition). | Audience exposure |
| Brand lift | Difference in surveyed awareness, recall, or consideration between exposed and comparison audiences (Google Brand Lift). | Change in brand perception |
| Clickthrough rate (CTR) | Clicks ÷ impressions × 100 (Google Ads definition). | Response to ads or listings |
| Average cost per click (CPC) | Total click cost ÷ total clicks (Google Ads definition). | Cost of paid traffic |
| Website engagement rate in GA4 | Engaged sessions ÷ total sessions × 100 (Google Analytics definition). | Engagement during website visits |
| Conversion rate in Google Ads | Conversions ÷ ad interactions eligible for conversion tracking × 100 (Google Ads definition). | Completion of a selected action |
| Cost per lead (CPL) | Marketing spend ÷ leads generated within the defined scope (Mailchimp formula). | Lead generation cost |
| Lead-to-customer rate | Customers from a defined lead group ÷ leads in that group × 100 (Salesforce formula). | Conversion from prospect to customer |
| Customer acquisition cost (CAC) | Total acquisition cost ÷ new customers acquired (Salesforce definition). | Cost of acquiring customers |
| Return on ad spend (ROAS) | Attributed conversion value ÷ ad spend; multiply by 100 to express it as a percentage (Google Ads explanation). | Conversion value relative to media spending |
| Marketing campaign ROI | (Selected return value − campaign spend) ÷ campaign spend × 100 (HubSpot’s campaign formula). | Return after the specified campaign cost |
| Customer retention rate | (Customers at period end − new customers acquired during the period) ÷ customers at period start × 100 (Salesforce formula). | Retention of existing customers |
| Customer lifetime value (CLV) estimate | One cost-adjusted model is average revenue per customer per period × expected relationship duration in those periods − total cost to serve (Salesforce’s CLV models). | Estimated value across the customer relationship |
Awareness and engagement
Reach measures people exposed, while impressions include repeated displays; Google Ads’ unique reach documentation explains this distinction across devices. Awareness and recall concern what people remember. Google’s Brand Lift methodology measures these outcomes by comparing survey responses from people exposed to ads with responses from eligible people who were not exposed.
CTR describes the share of impressions producing clicks. Google notes that a good CTR depends on the advertising and network. Use it to assess response under comparable conditions, alongside the later action the campaign is intended to generate.
Website engagement also needs a definition. In GA4, an engaged session lasts longer than 10 seconds, records a key event, or has at least two page or screen views. Its engagement rate therefore has a specific session-based meaning. Label it as GA4 engagement rate when presenting it beside engagement figures from other channels.
Leads and conversions
A conversion is the action selected for measurement. Keep purchases, registrations, and inquiries as separate events. Google Ads’ conversion rate uses eligible ad interactions as the denominator and can exceed 100 percent when multiple conversions are counted for one interaction. It does not necessarily represent the percentage of distinct people who converted.
Specify whether a website rate uses visitors or sessions, and whether a lead-to-customer rate follows a defined lead group. Record the numerator, denominator, conversion event, and observation window beside the formula. Avoid using the same label for rates with different bases.
Lead qualification adds another distinction. Mailchimp describes marketing qualified leads as interested prospects who fit the target profile, and sales qualified leads as prospects showing buying readiness. Its cost-per-lead guidance provides separate cost measures for these groups. Define qualification criteria before reporting their counts, and show subsequent customer conversion alongside the lead cost.
Acquisition, ROAS, and ROI
CAC measures the cost of acquiring customers. Salesforce’s definition includes marketing, sales, tools, and related resources. Ad spend divided by new customers is a narrower measure; label that cost boundary explicitly.
ROAS measures conversion value relative to ad spend. Google Ads allows conversion values to represent the business value assigned to different actions. Identify whether the numerator contains purchase revenue or assigned values for another event before interpreting the ratio.
ROI additionally subtracts costs, but its meaning depends on the fields used. HubSpot’s campaign ROI calculation can use revenue, attributed revenue, or associated deal value as the return. Those settings produce a return against campaign spend rather than a complete accounting of profit. Google’s ROI explanation includes production and advertising costs in its example, illustrating why the cost scope matters.
For spending decisions, specify the return measure and included expenses. Review acquisition cost alongside customer value and the time needed to recover it; Salesforce’s acquisition guidance identifies customer value and payback as complementary measures.
Retention and customer value
Customer retention rate measures how many existing customers remain over a defined period. The retention formula removes new customers from the ending count before comparing it with the starting count. Keep the definition of an active customer and the period consistent across reports.
CLV extends the measurement horizon to the customer relationship. Salesforce’s CLV guide distinguishes revenue potential from a model that subtracts the cost to serve, and notes that models may incorporate additional costs or discounting. Label the model and its assumptions, including the period used for average revenue and expected duration. A revenue estimate and a cost-adjusted value answer different questions.
Choose channel measures without changing the business goal
Channel reports help explain performance, while the objective determines the main KPI. Keep the channel’s native definitions alongside the relevant customer outcome.
For email, Mailchimp’s click rate measures the share of delivered emails registering at least one click. Its open tracking depends on images, and bot activity, including Apple Mail Privacy Protection, can inflate reported engagement. Review the reporting filters and pair click measures with the campaign’s completed action.
For organic search, Google Search Console’s Performance report measures clicks, impressions, CTR, and average position in Google Search results. Use these to examine visibility and search response, then measure the destination page’s selected conversion separately.
For paid advertising, retain CTR and CPC as response and cost measures, alongside the named conversion, CAC, or ROAS appropriate to the objective. For social media and content, state the platform’s engagement definition and report the selected downstream outcome separately. This reporting approach preserves the business goal while allowing each channel to supply relevant detail.
Set targets and build a usable KPI report
Microsoft distinguishes leading indicators from lagging indicators: leading indicators help assess future performance, while lagging indicators describe completed results. Treat earlier actions as provisional signals and keep the final outcome visible when selecting the reporting measures.
Use this setup process:
- Define the goal and result. Name the awareness change, qualified lead, acquired customer, return, or retention outcome the report will evaluate.
- Document the measurement. Record the event, population, formula, data source, time window, cost scope, and any attribution settings. Show the counts behind each rate.
- Set the target and review responsibility. Establish a baseline, target, deadline, owner, and review frequency. Microsoft recommends targets grounded in history and resources, with an owner for each KPI.
A compact report can use the following fields. Keep the measurement definition available beside the results or in an attached reference.
| Field | What to record |
|---|---|
| Objective and KPI | The intended result and selected measure |
| Baseline and target | The starting position and desired result by a stated date |
| Actual and prior result | The current value and a comparable previous value |
| Measurement scope | Counts, denominator, customer group, costs, and attribution settings |
| Owner and review date | Who maintains the measure and when it will be assessed |
| Interpretation and action | What the result supports and the next adjustment or investigation |
Match the observation window to the outcome. Google Ads advises excluding the most recent conversion delay period when evaluating ROAS. Record provisional results as provisional and note when later conversions will be included. Annotate changes to definitions or settings before comparing periods.
Interpret attribution and benchmarks carefully
Attribution distributes credit for observed outcomes. HubSpot separates contact creation, deal creation, and won revenue attribution. Its models allocate credit among recorded interactions. Keep those conversion points and model names visible when reporting marketing contribution.
Incrementality asks how much additional activity the marketing caused. Google’s Conversion Lift documentation compares treatment and control outcomes, and distinguishes incremental conversions from conversions assigned by attribution rules. Attributed revenue therefore does not establish causal lift. Use a suitable experiment when the decision requires an estimate of additional outcomes, and retain the reported uncertainty.
Benchmarks provide comparison context. Google Analytics’ benchmarking documentation organizes comparisons by industry peer groups and reports a median and percentile range. Check the peer group, event, denominator, and period before comparing performance. Set the operating target from the business objective, historical results, and cost requirements; use the benchmark to guide investigation.