Sharing this because I think a lot of people (myself included, for a while) over-index on lead volume and CPL as the main success metric for paid campaigns.

Ran a 12-month CRM analysis connecting monthly lead cohorts to their actual sales-qualified outcomes (not just "lead generated" but "lead qualified"). A few things stood out:

- March had the highest lead volume of the whole year: 747 leads. SQL rate was only 16.2%.

- July had way fewer leads (553) but hit a 25.1% SQL rate — the best month of the entire dataset, and actually produced MORE sales-qualified leads than March (139 vs 121).

- Overall across the full year: 4,499 leads → 609 SQLs → 13.5% average SQL rate. But that average hides a LOT of monthly variance (some months as low as 8.5%).

The takeaway that stuck with me: if you're only optimizing for cost-per-lead, you can easily end up optimizing for the wrong thing. A campaign that produces "cheap" leads that never qualify is worse than a campaign with a higher CPL but a much higher SQL rate.

The other underrated variable here: CRM discipline. Sales reps consistently logging accurate statuses (qualified, not interested, callback, etc.) is what made this analysis possible at all. Messy CRM data = you can't actually see this stuff.

Full breakdown with the monthly table and framework (ad spend → leads → SQL → opportunity → customer → revenue) is here if useful

Curious if others tracking SQL rate monthly have seen similar swings — what's caused the biggest jump/drop for you?

(I work as a performance marketing specialist, mostly digging into exactly this kind of lead-quality data for clients — happy to talk through anyone's setup in the comments if it helps.)