The essentials
- The difference: in B2B the cycle lasts from 1 to 9 months, several people decide and the sale closes offline; the useful KPI is the qualified lead, not the session.
- Eight metrics: marketing qualified leads (MQL), leads accepted by sales (SQL), cost per qualified lead, cost per opportunity, conversion rate by stage, cycle length, pipeline generated, CAC and LTV.
- 2026 benchmarks: cost per qualified lead of €40 to €150 via SEO, €80 to €250 via Google Ads, €100 to €400 via LinkedIn Ads; MQL to SQL rate of 20 to 40%.
- Organisation: a CRM connected to the sources, a shared definition of the qualified lead, a monthly review with marketing and sales.
B2B marketing is poorly measured with B2C metrics. The sales cycle lasts weeks or months, several people take part in the decision, and the transaction closes offline, through a quote or a contract. Tracking sessions, followers or even form submissions does not say whether marketing produces revenue. This article lists the eight metrics to prioritise, gives the 2026 benchmarks by channel and describes how to organise tracking between marketing and sales. The general metrics are in digital marketing KPIs, and the definitions in KPI: definition.
Why B2B KPIs are different
| Characteristic | B2C | B2B | Consequence for the KPIs |
|---|---|---|---|
| Cycle length | Minutes to days | 1 to 9 months | Measure by cohort, not by calendar month |
| Decision-makers | One person | 3 to 7 people | Track accounts, not only contacts |
| Place of conversion | On the site | Quote, meeting, contract | Connect the site to the CRM |
| Value of a sale | €10 to €500 | €2,000 to €500,000 | Few conversions, every lead counts |
| Monthly lead volume (SME) | Hundreds to thousands | 10 to 200 | Fragile statistics, read over the quarter |
The eight metrics to prioritise
- Marketing qualified leads (MQL): contacts that match the target (sector, size, role) and have shown interest (demo request, quote, download followed by a visit to the pricing page). The definition must be written down and shared with sales.
- Leads accepted by sales (SQL): MQLs that the sales rep has contacted and judged workable. The MQL to SQL rate (20 to 40% in 2026) measures the quality of marketing.
- Cost per qualified lead: the channel budget divided by the SQLs it produced, agency and tool costs included.
- Cost per opportunity: budget divided by the deals opened in the CRM with an amount and a date; this is the metric that speaks to management.
- Conversion rate by stage: visit to lead, lead to MQL, MQL to SQL, SQL to opportunity, opportunity to signature. Each drop locates the problem.
- Cycle length: from first contact to signature, by source; a channel that brings shorter deals is worth more than a cheaper one.
- Pipeline generated: the amount of opportunities opened by marketing over the period, weighted by the probability of signature.
- CAC and LTV: the cost of acquiring a customer (all marketing and sales costs) against the value they bring over their lifetime; an LTV / CAC ratio of 3 is the usual profitability threshold. See CAC: definition and LTV in digital marketing.
2026 benchmarks by channel
| Channel | Cost per qualified lead | MQL to SQL rate | Role in the cycle |
|---|---|---|---|
| SEO and content (including GEO) | €40 to €150 | 30 to 45% | Discovery and consideration, best quality |
| Google Ads search | €80 to €250 | 25 to 40% | Expressed intent, shorter cycle |
| LinkedIn Ads | €100 to €400 | 20 to 35% | Targeting by role, awareness within accounts |
| Meta Ads | €30 to €120 | 10 to 25% | Volume, variable quality, micro-businesses and independent professionals |
| Email and nurturing | €10 to €50 | 30 to 50% | Reactivation, cycle acceleration |
| Events and webinars | €60 to €300 | 30 to 50% | Consideration, proof of expertise |
| Referral and partners | €20 to €100 | 50 to 70% | Best signature rate, limited volume |
These ranges vary widely by sector and by deal size: software at €100 a month and an industrial project at €200,000 do not have the same acceptable costs. The benchmark to keep is the ratio between the cost per opportunity and the average margin of a deal; below 10%, the channel is profitable without discussion. The metrics specific to LinkedIn are detailed in creating an effective LinkedIn Ads campaign.
The useful secondary metrics
- Engaged accounts: the number of target companies of which several contacts have visited the site or opened emails over 30 days; this is the basis of an account-based approach.
- Qualified traffic: sessions on the offer, pricing and case study pages, separated from blog traffic; GA4 isolates them by audience, see creating a custom audience in GA4.
- Brand searches: in Search Console, they measure the awareness produced by content, events and LinkedIn.
- Citation by AI: in 2026, a growing share of B2B buyers question ChatGPT or Perplexity before approaching a supplier; presence in those answers is tracked like an SEO position.
- Lead response time: the time between the form and the first call; beyond 24 hours, the conversion rate drops by 30 to 50%.
Organising tracking between marketing and sales
B2B tracking rests on three conditions. The first is a CRM connected to the sources: each lead carries its source, its medium and its campaign (UTM), and each opportunity keeps that origin through to signature; the method is in tagging your digital campaigns. The second is a shared, written definition of the qualified lead, with a service level agreement: marketing delivers compliant MQLs, sales handles them within 24 hours and updates the status. The third is the joint 30-minute monthly review: leads by source, rate by stage, opportunities opened, deals signed attributed to marketing, cost per opportunity. The figures are read over the rolling quarter, because the monthly volume is too small to conclude anything.
The frequent mistakes
- Counting forms: a form is not a lead; 30 to 60% of B2B forms are off target, students, suppliers or spam.
- Attributing to the last click: a six-month cycle goes through an article, a webinar, a LinkedIn ad and a brand search; last click credits Google with everything.
- Reading by the month: with 20 leads a month, a gap of 5 is noise; the quarter is the right grain.
- Separating marketing and sales: without feedback from sales on lead quality, marketing optimises volume and degrades quality.
- Ignoring the full cost: the cost per lead displayed by the platform leaves out the agency, the tools, the content and internal time.
How GreenRed helps
Rather than juggling several tools, GreenRed's return on investment module brings these metrics together in a single dashboard, compares them over time and tells you which actions come first. You can try it free, with no card, from the Pricing.
Frequently asked questions
Which KPIs matter most in B2B marketing?
Qualified leads (MQL and SQL), cost per qualified lead, cost per opportunity, the conversion rate at each stage, cycle length, pipeline generated and the LTV / CAC ratio. Sessions, followers and impressions are activity metrics, not result metrics.
What cost per lead is acceptable in B2B in 2026?
From €40 to €150 per qualified lead via SEO, €80 to €250 via Google Ads, €100 to €400 via LinkedIn Ads. The right benchmark is the cost per opportunity set against the average margin of a deal: below 10% of the margin, the channel is profitable.
How do you measure B2B marketing when the sale happens offline?
By connecting the site to the CRM: each lead carries its source and its campaign (UTM), and the opportunity then the signature keep that origin. The joint monthly review between marketing and sales reads the pipeline and the deals signed by source, over the rolling quarter.
What is a qualified lead in B2B?
A contact that matches the target (sector, size, role) and has shown real interest (demonstration, quote, visit to the pricing page after a download). The definition must be written down and validated by sales; the rate of MQLs accepted by the sales team, between 20 and 40%, measures its quality.
Why read B2B KPIs by the quarter rather than by the month?
Because the volume is small (10 to 200 leads a month in an SME) and the cycle long (1 to 9 months). A monthly gap of a few leads is noise, and a campaign launched in January produces its signatures in April. The rolling quarter and cohorts give an accurate reading.