Most performance marketing dashboards are full of metrics that feel important but drive no decisions. Impressions, reach, and follower counts are vanity metrics — they tell you about activity, not outcomes. The performance marketing KPIs that actually matter are the ones that connect directly to revenue: how much does it cost to acquire a customer, how long does that customer stay, and is the math profitable? This guide covers the five metrics that matter and how to calculate each.
KPI 1: Cost Per Lead (CPL)
CPL is the total ad spend divided by the number of leads generated. It is the most widely tracked paid media metric and the most frequently misinterpreted one.
Formula: Total ad spend / Number of leads = CPL
The problem with CPL in isolation: a $20 lead that never qualifies is more expensive than a $200 lead that closes at 30%. CPL must always be paired with lead quality metrics. Track CPL separately by campaign, ad set, creative, and traffic source to understand which inputs produce the best cost-efficiency.
Benchmarks by category (2025 US market): B2B services $100–$300, local services $20–$80, SaaS $50–$200, e-commerce $5–$30.
KPI 2: Customer Acquisition Cost (CAC)
CAC is the total marketing and sales spend divided by the number of new customers acquired. It is the business-level version of CPL.
Formula: (Total marketing spend + Total sales spend) / New customers acquired = CAC
CAC includes ad spend, agency fees, salesperson salaries, CRM costs, and any other cost to acquire a customer. For most service businesses, CAC is 3–10x CPL because of the gap between leads generated and leads closed.
If your CAC is $2,000 and your average deal size is $4,000, you have a 2:1 ratio. Whether that is profitable depends on your margin and LTV (see below).
KPI 3: Customer Lifetime Value (LTV)
LTV is the average total revenue you expect from a customer over the entire relationship. For subscription or retainer businesses, this is straightforward. For project-based businesses, it requires tracking repeat purchase rate.
Formula: Average order value × Purchase frequency × Average customer lifespan = LTV
The LTV:CAC ratio is the most important number in your business. A ratio of 3:1 or higher means your acquisition economics are healthy. Below 2:1 and you are likely acquiring customers unprofitably when you account for full costs.
The LTV calculation also determines how much you can afford to spend per acquisition. If a customer is worth $15,000 over their lifetime, spending $2,000 to acquire them is a 7.5x return — an obvious investment. The same $2,000 CAC for a customer worth $2,500 is barely break-even.
KPI 4: Return on Ad Spend (ROAS)
ROAS measures revenue generated for every dollar spent on advertising.
Formula: Revenue attributed to ads / Ad spend = ROAS
A ROAS of 4.0 means $4 revenue for every $1 spent. Benchmarks: e-commerce targets 3–5x ROAS. Service businesses need to define what counts as “revenue attributed to ads” carefully, since the sales cycle is longer and attribution is messier.
The important caveat: ROAS is a gross revenue metric, not a profit metric. A 4x ROAS on a 20% margin product means 4 × 20% = 80% of ROAS goes to COGS — your actual return on ad spend is 0.8x. Always calculate ROAS against margin, not revenue.
KPI 5: Pipeline Velocity
Pipeline velocity measures how fast leads move through your sales process to closed revenue. It combines four elements:
Formula: (Number of opportunities × Average deal size × Win rate) / Sales cycle length in days = Pipeline velocity
Pipeline velocity is the KPI that tells you where your biggest leverage points are. Increasing win rate from 20% to 25% (while holding other variables constant) increases pipeline velocity by 25%. Cutting your sales cycle from 60 days to 45 days has the same effect. Understanding which lever moves it most tells you where to focus.
Metrics That Are NOT Worth Tracking
- Impressions: Being seen is table stakes, not an outcome
- Reach: How many people could have seen your content — not the same as people who engaged
- Likes and shares: Engagement metrics correlate weakly with revenue for most service businesses
- Traffic volume: Traffic that does not convert to leads does not help you
- Click-through rate (in isolation): CTR matters only in context of conversion rate — high CTR with zero conversions means a traffic quality problem
Frequently Asked Questions
What is a good ROAS for service businesses?
Service businesses cannot use e-commerce ROAS benchmarks directly. Instead, calculate target ROAS from your margin: if your gross margin is 60% and you want to spend no more than 30% of revenue on marketing, your minimum target ROAS is 1/0.30 = 3.3x.
How often should I review performance marketing KPIs?
CPL and ROAS: weekly, during active optimization. CAC and LTV: monthly (they move slower and require more data). Pipeline velocity: monthly in sales review. Avoid daily KPI reviews — noise-to-signal ratio is too high at that frequency.
How do I measure CAC when my sales team also does outbound?
Allocate costs proportionally: if 60% of deals come from inbound marketing and 40% from outbound sales, split total spend accordingly. Or calculate separate inbound CAC and outbound CAC — they are usually very different and should be managed separately.
What LTV:CAC ratio should I target?
3:1 or higher for a healthy marketing business. Below 2:1 means you are likely scaling unprofitably. Above 5:1 may mean you are under-investing in growth.
How do I track revenue from ads when my sales cycle is 90 days?
Use a CRM to track lead source at creation and revenue at close. Match closed deals back to original lead source after 90–120 days. This lag is normal and must be planned for when evaluating campaign performance — you cannot know month 1 results until month 3 or 4.
UNHOOKED builds reporting dashboards that track all five of these KPIs in real time. See how the analytics system works.