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Amazon PPC Bidding Strategies: How to Choose in 2026
The best Amazon PPC bidding strategy depends on the campaign's job. Use dynamic bids down only for most campaigns because it protects profit, up and down for proven keywords where you want more top-of-search sales, and fixed bids when you need clean test data. Then set each keyword's bid with one formula: average order value x conversion rate x target ACoS.
Key takeaways
- Amazon Sponsored Products offers three campaign bidding strategies: dynamic bids down only, dynamic bids up and down, and fixed bids.
- Your max bid should come from your numbers, not from Amazon's suggested bid: AOV x CVR x target ACoS.
- Placement adjustments (up to 900%) stack with dynamic bidding, so an innocent-looking $1.00 bid can cost far more.
- Match the strategy to the goal: profit, launch visibility or testing.
The three Amazon bidding strategies
You pick one bidding strategy per Sponsored Products campaign. Find it in the Ads console under Campaign Manager > select a campaign > Settings > Campaign bidding strategy. For a new campaign it is in the setup screen, under the same name.
| Strategy | What Amazon does | Best for | Main risk |
|---|---|---|---|
| Dynamic bids - down only | Lowers your bid in real time when a click is less likely to lead to a sale | Most always-on campaigns, profit focus | Can lose some impressions you would have won |
| Dynamic bids - up and down | Raises your bid when a sale looks likely, lowers it when it looks unlikely | Proven keywords, launches, deal events | Higher CPCs and faster budget burn |
| Fixed bids | Uses your exact bid; no automatic changes | Clean tests, tight cost control | Misses Amazon's conversion signals |
Dynamic bids - down only
Amazon can cut your bid, by up to 100%, for auctions it judges unlikely to convert. It never raises it. This makes it the default choice for most sellers: your bid is a hard ceiling, and Amazon trims spend on weak traffic for you.
Dynamic bids - up and down
Amazon can both raise and lower your bid. Its Sponsored Products dynamic bidding guide says it can change bids by up to 100% for all placements, so a $1.00 bid could reach $2.00. Check the tooltip in your console for the current rule.
Amazon recommends this strategy when sales are the main goal, when you want top-of-page placements, and for high-performing campaigns, deal ASINs or excess stock. It also warns you to be ready to spend up to double your bid.
Fixed bids
Amazon uses the bid you set for every auction, before any placement adjustment. You get predictable costs and clean data, which is useful when you are testing a new keyword, comparing two listings, or checking how a placement converts. The trade-off is that you ignore Amazon's real-time view of which shoppers are likely to buy.
How to calculate your max bid
A bidding strategy only tells Amazon how to move your bid. You still need the right starting bid. The standard formula is:
Max CPC = Average order value x Conversion rate x Target ACoS
- CPC is cost per click.
- ACoS (advertising cost of sales) is ad spend divided by ad sales.
- CVR (conversion rate) is orders divided by clicks.
- AOV (average order value) is ad sales divided by orders.
Worked example
Say your product sells for $29.99. After the referral fee, FBA fee and product cost, you keep $10.50 per unit before ads. That makes your break-even ACoS 35% ($10.50 / $29.99). You want some profit left, so you target a 25% ACoS.
Your keyword "bamboo sheets queen" converts at 12%.
- Max CPC = $29.99 x 0.12 x 0.25 = $0.90
- Break-even CPC = $29.99 x 0.12 x 0.35 = $1.26
So bid around $0.90. Anything above $1.26 loses money on every sale from that keyword, unless you are deliberately paying for rank. You can run these numbers in our Break-even ACoS & Max Bid Calculator, and read more about the margin side in break-even ACoS.
What if the keyword has no data yet?
New keywords have no conversion rate. Use the average CVR of similar keywords in the same campaign, or your listing's unit session percentage from Business Reports as a rough stand-in (ad traffic often converts differently from organic traffic, so treat it as a starting point). Start at or slightly below the formula's result. Then wait for enough clicks before judging it. A common rule is to let a keyword collect roughly as many clicks as it takes, on average, to make one sale (about 100 / CVR%) before cutting it.
How placement adjustments change your real bid
Sponsored Products lets you raise bids by placement, from 0% to 900%, for three placements:
- Top of search (first page)
- Rest of search (added in January 2024)
- Product pages
These adjustments stack with dynamic bidding. Here is how a $1.00 bid can grow:
| Setting | Top of search bid |
|---|---|
| Base bid | $1.00 |
| + 50% top-of-search adjustment | $1.50 |
| + Up and down (up to 100% more) | up to $3.00 |
| Same, but with a 200% adjustment | up to $6.00 |
That last row is why some sellers see CPCs that look impossible. Amazon's auction usually charges less than the maximum, but the ceiling is real. Before you add a placement adjustment, check the placement report (Campaign Manager > campaign > Placements) and only boost a placement that converts better than the others. We cover this in depth in Amazon placement bid adjustments.
A safer way to win top of search
If your target is top of search, many sellers lower the base bid and add a top-of-search adjustment instead of raising the base bid. For example, a $0.70 base bid with a 60% top-of-search adjustment bids $1.12 at the top and $0.70 everywhere else. You pay more only where the conversion rate justifies it.
Which strategy to use for each campaign type
| Campaign goal | Strategy | Why |
|---|---|---|
| New product launch (first weeks) | Up and down, or fixed | You need impressions and data, and you accept a higher ACoS for a period |
| Auto campaign for keyword discovery | Down only | Cheap discovery; Amazon trims poor-quality traffic |
| Broad and phrase research campaigns | Down only | Many loose matches convert poorly |
| Exact match on proven keywords | Up and down | Clicks have a known, strong CVR |
| Branded keywords (your own brand) | Up and down or fixed | High conversion, defensive value |
| Competitor ASIN or brand targeting | Down only or fixed | Usually lower CVR, easy to overspend |
| A/B tests and bid experiments | Fixed | Removes Amazon's adjustments from the result |
For launch tactics specifically, see our Amazon PPC product launch strategy.
Should you use rule-based or fully automated bidding?
Amazon also offers rule-based bidding on eligible campaigns, where you set a ROAS (return on ad spend) goal and Amazon adjusts bids to aim for it, and it has tested options that set bids for you within a budget. These can save time on large, stable campaigns. They also hide the per-keyword reasoning. If you use them, compare results against a manually managed campaign before you switch over widely.
How to adjust bids week to week
A simple, widely used routine:
- Pull the targeting report for the last 14 to 30 days. Shorter windows are noisy; longer ones hide recent changes.
- Sort targets into groups. - ACoS well below target and good sales: raise the bid 10–20%. - ACoS near target: leave it alone. - ACoS above target with enough clicks: lower the bid toward the formula result. - Many clicks and zero sales: lower the bid sharply or pause the target.
- Recalculate the max bid for any keyword whose CVR has moved. If CVR rises from 10% to 14%, the keyword can afford a 40% higher bid at the same ACoS.
- Check impressions on low-spend targets. If a good keyword gets almost no impressions, your bid may be too low to compete. Raise it in steps.
- Wait before judging the change. Give each change about a week, and remember sales can be attributed up to 7 days after a click for Sponsored Products seller campaigns, so the last few days always look worse than they will end up.
Seasonal and peak-period bidding
CPCs usually rise in Q4. Amazon's holiday peak fulfillment fees also apply from 15 October 2026 to 14 January 2027, which lowers your profit per unit and so lowers your break-even ACoS. Recalculate your max bids with the higher fee for this period, or you may bid more than each sale can carry. The FBA Profit Calculator helps you rework your margin first.
Common bidding mistakes
- Using Amazon's suggested bid as your bid. It reflects what others pay, not what your margin can afford.
- Turning on up and down plus big placement boosts on a new campaign. You will not know which setting caused high CPCs.
- Judging keywords too early. Ten clicks with no sale on a keyword that converts at 8% is normal.
- Raising bids on high ACoS keywords to "win more". If the keyword already loses money, more traffic loses more money.
- One bid for a whole ad group. Different keywords convert differently and need different bids.
- Ignoring TACoS. TACoS (total advertising cost of sales) is ad spend divided by total sales. A rising ACoS can be fine during a launch if total sales and organic rank are growing.
Bottom line
Start most campaigns on dynamic bids down only, set every bid from AOV x CVR x target ACoS, and save up and down for keywords that already convert well. Treat placement adjustments as a multiplier you add on purpose, not a default. Review bids weekly with at least two weeks of data, and recalculate when your margin or conversion rate changes.
Frequently asked questions
Which Amazon bidding strategy is best for beginners?
Dynamic bids down only is the safest starting point. Amazon can only lower your bid when a click looks less likely to convert, so you never pay more than the bid you set. Once you have a few weeks of data, you can move proven campaigns to up and down.
Do I pay my full bid on every click?
Usually not. Amazon Sponsored Products runs an auction, and your actual cost per click is often below your bid. Your bid is the most you are willing to pay, before any dynamic or placement increases you have allowed.
How often should I change my Amazon PPC bids?
For most campaigns, review bids once or twice a week and make a bigger review every two weeks. Changing bids daily on targets with only a few clicks reacts to noise, not real performance. Amazon's own dynamic bidding guide suggests reviewing bids about every two weeks.
Can dynamic up and down bidding overspend my budget?
It can spend faster, because Amazon may raise your bid for clicks it thinks will convert. Amazon advises being ready to spend up to double the bid you enter. Use it on campaigns with proven conversion rates and keep an eye on daily budget and ACoS.
Should I use the same bid for every keyword?
No. Each keyword has its own conversion rate, so each one can afford a different cost per click. Set bids per target using the max bid formula, then adjust based on actual ACoS and sales.
Amazon fees, policies and features change often. Figures here were checked in October 2026; confirm current rates in Seller Central before making pricing or budget decisions. Sotrics is not affiliated with Amazon.