Social Media Advertising: Lessons from a $50K Campaign

We put $50K into Instagram and Facebook ads over eight weeks. The goal was simple: generate leads for a B2B SaaS tool at under $40 CPA. We hit $31 average CPA and learned a few things worth repeating.

What actually moved the needle

Early tests showed broad interest targeting wasted budget fast. We switched to custom audiences built from website visitors and email opens within the first 10 days. That single change cut cost per lead by 38 percent.

1. Week 1-2: Run 8-10 ad variations with $50 daily budgets each. Kill anything above $60 CPA after 72 hours.
2. Week 3-4: Double down on the two winners and layer retargeting sequences. One carousel ad using customer screenshots converted at $22 CPA.
3. Week 5-8: Allocate 70 percent of remaining budget to lookalikes of purchasers. The 1 percent lookalike from recent buyers became our lowest-cost segment.

Creative mattered more than we expected. Static images with plain text overlays beat polished video by 2.4x on click-through rate. We stopped using stock photos after the second week.

Daily budget pacing helped. We set a hard stop at 2x target CPA on any ad set and reviewed numbers every morning at 9 a.m. This kept us from burning the last $12K on underperformers.

Track pixel events yourself instead of relying only on platform dashboards. Our backend data showed 12 percent more conversions than what Facebook reported, which changed how we calculated final ROAS.