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## Facebook Ads Scaling Issue After Stable ROAS – Budget Increase Causes Performance Drop
Hey everyone,
Looking for some advice from experienced media buyers who’ve successfully scaled Facebook ad campaigns without killing performance.
I’ve been running a conversion-focused Facebook Ads campaign for the last 3 weeks, and I’ve finally reached a relatively stable ROAS between 2.5x–3x consistently. Right now, the campaign is spending around $50/day and performing well with decent CPA and conversion quality.
The issue starts when I try to scale.
Every time I increase the campaign or ad set budget — even by a small amount like 20–30% — performance drops within 24–48 hours. CPMs go up, CPA increases, ROAS falls, and sometimes conversions slow down completely.
Here’s what I’ve already tested so far:
* Gradual budget scaling (10–20% every few days)
* Duplicating winning ad sets into higher budgets
* Broad targeting vs interest-based targeting
* ABO vs CBO structures
* Scaling during winning days only
* Keeping winning creatives active while scaling
Despite all this, I’m struggling to maintain consistency once spend increases.
A few things I’m trying to understand:
* Is this usually caused by creative fatigue or audience saturation?
* Does Facebook’s learning phase get disrupted too aggressively during scaling?
* At lower spends, the algorithm seems very efficient — but is there a common “threshold” where efficiency naturally drops?
* Would horizontal scaling (more ad sets/campaigns/creatives) work better here than vertical scaling through budget increases?
* How do you usually scale from $50/day to $200+/day without destroying ROAS?
Would really appreciate insights from people managing higher-spend Meta campaigns or performance marketing accounts.
Thanks in advance!
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