Is my Amazon bid the same as what I pay per click?
No. Your bid is a maximum; the CPC is what the auction actually charged, and it is usually lower. But in the other direction, placement multipliers raise the bid above the number you typed — a +100% top-of-search multiplier turns a $0.40 bid into $0.80 in that placement. Comparing a break-even bid against the number in the bid field, without the multipliers, is how accounts quietly bid above break-even.
Three different numbers
| Number | What it is |
|---|---|
| Bid | The maximum you offered |
| Effective bid | Bid × placement multiplier |
| CPC | What the auction actually charged |
Confusing the first and the third makes you cut bids on keywords that were fine. Ignoring the second makes you bid above break-even without noticing.
A worked example
You set a $0.40 bid and a +100% top-of-search multiplier. The break-even bid for the product is $0.55.
- In the rest of search and on product pages, your effective bid is $0.40 — comfortably under break-even.
- At top of search, your effective bid is $0.80 — well above it.
The campaign’s blended ACoS can still look acceptable, because the cheap placements average out the expensive one. The placement breakdown is the only view that shows it.
What to do with it
Read ACoS per placement before changing a multiplier. If top of search converts well enough to carry the higher effective bid, keep it. If it does not, the multiplier is quietly spending your margin.
Checklist
- Are you reading CPC, not bid, when judging keyword cost?
- Do you know the effective bid in each placement?
- Is placement ACoS visible separately from campaign ACoS?
- Does your break-even comparison use the adjusted bid?
Frequently asked questions
Is the bid the same as cost per click?
No. The bid is the maximum you are willing to pay; the CPC is what the auction charged, which is usually less. Judging keywords by bid rather than CPC makes them all look more expensive than they are.
What does a placement multiplier do?
It increases your base bid in a specific placement. A +100% multiplier on top of search doubles the effective bid there, and only there.
Which number should I compare to break-even?
The multiplier-adjusted bid for the placement in question, not the number typed into the bid field.