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When and how fast to scale Meta ads — scaling criteria and the 80/20 budget split

Smart Marketer's 2025 scaling rules (scale at CPA 50% below target for 7 days, +20% every 3 days, watch weekly frequency >2), the 80/20 prospecting/retargeting split with new-vs-existing exclusions, and the Pretty Farm Girl case (spend doubled, revenue +65% in 60 days).

Updated 2026-10-24·1 source·ecommercemeta-adsscalingbudgetmedia-buyingcase-study

When and how fast to scale Meta ads

TL;DR

  • Scale when CPA is ≥50% below target for 7 days.1
  • Raise budget ~20% every 3 days — doubling usually spikes CPA.1
  • Weekly frequency above ~2 → consider throttling/pausing to avoid wearing out audiences.2
  • Budget split: ~80% prospecting (excluding people who engaged/bought), ~20% retargeting — up from the 60/40 Smart Marketer used to recommend.3
  • Split new vs existing customers with exclusions — Advantage+/CBO “prospecting” often mostly retargets existing customers.4
  • Set goals from back-end customer value (what a customer is worth over the first year), not in-platform ROAS.56

Details

Who. Molly Pittman (Smart Marketer agency), July 2025, sharing the criteria from a media-buyer call “last week”; she notes they’ve scaled ~20% per 3 days since she started Meta ads in 2012.1

Pretty Farm Girl case (family farm brand selling tallow skincare, riding a hot trend): in 60 days the agency doubled ad spend and grew revenue ~65% (Molly also says 60%).78 In order, per media buyer Dominique:49

  1. Funnel fix — separate new and existing customers with proper exclusions, so you know whether you’re actually acquiring.
  2. Creative overhaul — fresh formats; the founder was strong on camera but they relied on her too much.
  3. Message testing — a product almost every woman could use is a trap: find pockets by age, interests, skin type, daily life and write to each.
  4. Budget — they were judging by in-Facebook ROAS; working out monthly customer value let them set more aggressive CPA goals.
  5. Landing pages — moved from product pages to homepage and evergreen discount collection pages (Evergreen discount collection pages for scaling ecommerce ads). They also weren’t spending 80% on new customers and didn’t know it.10

When 80/20 shifts. Brands with big organic traffic (SEO, organic social, TV, famous founder) have large retargeting pools and may need more bottom-funnel spend.3

Before the next scale push, have new creative variants ready so the algorithm has fresh inputs.2

Disagreements / caveats

  • Molly says every client has nuances; these are baselines for “e-com, non-e-com”.11
  • The revenue lift coincided with a trending category (tallow) — not all of it is attributable to the account changes.
  • App-UA notes in this base (How much Meta budget does an app need? (the 50-events math)) size budgets by the ~50 events/week learning threshold; Smart Marketer’s rules are CPA-headroom-based. Compatible, different lens.

See also

Footnotes

  1. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 37:16 — Molly Pittman ↩ ↩2 ↩3

  2. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 37:16 — Molly Pittman ↩ ↩2

  3. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 30:03 — Molly Pittman ↩ ↩2

  4. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 12:56 — Molly Pittman ↩ ↩2

  5. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 15:36 — Molly Pittman ↩

  6. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 31:15 — Molly Pittman ↩

  7. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 12:03 — Molly Pittman ↩

  8. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 06:31 — Molly Pittman ↩

  9. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 14:35 — Molly Pittman ↩

  10. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 31:15 — Molly Pittman ↩

  11. How We Doubled Ad Spend + Boosted Revenue 65% in 60 Days @ 38:50 — Molly Pittman ↩