Stop optimizing for ROAS. Start optimizing for contribution dollars per click. R
By Gabriel Caceros · May 26, 2026 · Curated by George's Blog
Stop optimizing for ROAS.
Start optimizing for contribution dollars per click.
ROAS treats every dollar of revenue the same.
A $40 sale at 60% margin is not the same as a $40 sale at 12% margin.
But your ROAS report shows them as identical.
That's how brands end up scaling unprofitable SKUs.
Here's the framework we use to run unit economics on every account before we touch a bid.
Step 1 — Per-SKU contribution margin
For each ASIN:
→ Selling price
→ Minus COGS (landed cost, not invoice cost)
→ Minus Amazon fees (referral, FBA, storage, returns reserve)
→ Minus shipping/freight allocation
→ Minus promotional allowances (coupons, deals, S&S discount)
What's left is your contribution margin. Before ad spend.
Step 2 — Contribution per click ceiling
Take your per-SKU contribution margin. Multiply by your detail page conversion rate.
That's the maximum you can spend per click and still break even.
Example from a kitchen brand:
→ SKU A: $14 contribution, 9% CVR = $1.26 max CPC
→ SKU B: $22 contribution, 12% CVR = $2.64 max CPC
→ SKU C: $6 contribution, 15% CVR = $0.90 max CPC
Same brand. Three completely different bid strategies justified.
Step 3 — Map current bids against ceiling
This is where the picture gets ugly fast.
When we ran this on the kitchen brand:
→ SKU A was bidding $2.10 (67% over ceiling)
→ SKU B was bidding $1.80 (32% under ceiling — leaving share on the table)
→ SKU C was bidding $1.40 (56% over ceiling)
They had been managing all three to a 22% blended ACOS target.
Step 4 — Reallocate
We pulled bids on SKU A and SKU C to within ceiling. Pushed SKU B aggressively into top of search.
After 45 days:
→ Total spend down 19%
→ Total revenue down 8%
→ Total contribution dollars up $24K/month
Less revenue. More profit.
Step 5 — Build dashboards in contribution, not ROAS
ROAS at the campaign level. Contribution dollars at the portfolio level. Cash flow at the brand level.
If you're presenting ROAS to your CEO, you're presenting the wrong number.
The brands that scale profitably stopped chasing ratios.
They started chasing dollars.
Run this exercise on your top 10 SKUs this week. You'll find at least three that are scaling at a loss.
Fix those before you spend another dollar on growth campaigns.
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