Ad fatigue on Meta: the signal to watch, and when to refresh

Creative fatigue has one honest early-warning signal, CPMr, and a rough refresh cadence. How to read it before your best ad quietly stops working.

A fatiguing ad doesn't announce itself. ROAS drifts down a little each day, you assume it's the market, and by the time you notice, the creative's been dead for a week. There's a cleaner signal than gut feel.

Watch CPMr, not just frequency

CPMr, the cost to reach 1,000 unique people, is your early tell. When a creative fatigues, Meta pays more to find fresh eyeballs, so CPMr climbs before ROAS falls off a cliff. For most verticals, under about $20 is healthy, and a steady climb is your warning shot. Frequency helps too. The average user sees the same creative around 4 times, and by the fourth exposure the odds of a conversion drop about 45%.

How often to refresh

Most accounts want new creative every 2–4 weeks. Not a full teardown, just a refresh. A new hook on a winning concept often buys you another two weeks, because the thing that fatigues first is usually the opening, not the whole idea.

Fatigue isn't a creative problem, it's a supply problem. If you always have the next batch ready, a fatiguing ad is a scheduled swap, not a fire drill.

The real fix is upstream

You can't out-monitor a thin pipeline. Teams that stay ahead of fatigue keep a queue of grounded concepts ready to ship, so when CPMr climbs they swap in the next proven direction that same day. Read what's fatiguing, and already have the replacement built.