Key takeaways: Prime Day PPC has three phases with different rules. Before: confirm stock covers the event plus recovery, push rank on target terms, raise budgets in advance and set alerts. During: monitor hourly, hold bids inside pre-agreed ranges, and keep budgets from capping. After: step bids down over a week rather than cutting them the morning after, and use the new conversion data to reset targets. The event itself is the smallest part of the work.
A Prime Day PPC strategy starts four weeks before the event and ends about two weeks after it. The event days themselves are high-traffic, high-CPC and short, and what you can do during them is limited to holding a plan. The plan is what matters: stock that will not run out, organic rank already pushed on the terms that will surge, budgets raised before the surge so campaigns do not cap out on the morning of day one, and agreed bid ranges so nobody is improvising at 2am. Then a controlled return, so the rank and conversion gains are kept rather than lost in a cliff-edge budget cut.
Before: the four-week run-up
Stock first
Nothing else matters if the product sells out on day one. Calculate the units needed for the event at a multiple of your normal daily rate, add the two to three weeks after the event when demand stays elevated, add the restock lead time, and check that inventory in fulfillment centers covers it. If it does not, the decision is to either reduce the event push on that ASIN or accept a controlled stock-out and plan the recovery. Scaling ads into a stock-out costs rank that takes weeks to rebuild. The stock and cash checks we run before any scaling decision are E5 · Stock and cash checks before we scale.
Rank next
Deals on Prime Day convert best on products that are already visible. Organic rank on target terms, built in the weeks before, means the deal badge appears on a listing shoppers were going to see anyway. Use the run-up to push top-of-search on the ten to fifteen terms that matter most, at an ACoS you are willing to carry for a month, and track rank weekly.
Deals and listing
Submit Lightning Deals or Prime Exclusive Discounts within Amazon's deadlines, which fall well before the event. Check the listing: main image, price history that will not trip the deal reference-price rules, A+ Content, and enough reviews to convert the extra traffic. A conversion problem on a normal day is a much larger problem on Prime Day.
Budgets and alerts
Raise daily budgets in advance, not on the morning. Amazon's averaging means a campaign can spend twice its daily budget on a single day, but campaigns still cap out during peaks, and a capped campaign at 10am on Prime Day has missed the best hours. Set budget rules for the event dates, raise portfolio caps to match, and set alerts for out-of-budget, out-of-stock and Buy Box loss.
During: hold the plan
| Check | Frequency | Action if off |
|---|---|---|
| Budget utilization per campaign | Every 2–3 hours | Raise where ACoS is in event band; do not raise campaigns already above it |
| CPC vs pre-agreed ceiling | Every 2–3 hours | Hold at ceiling; do not chase |
| Stock remaining vs run rate | Twice daily | Cut bids on any ASIN that will not last the event |
| Deal status and Buy Box | Twice daily | Pause ads on any ASIN that lost the Buy Box or deal |
| Conversion rate trend | End of each day | Inform day-two bids; do not react intra-day |
The bid ranges are set before the event. For each campaign group, agree a ceiling CPC and an event ACoS band that is wider than the normal one, because conversion rate on deal traffic behaves differently and attribution lags. During the event, bids move inside those ranges and no further. The temptation to chase a term that is suddenly expensive is strong and usually wrong; the CPC spike is other advertisers doing the same.
Attribution matters here. Sales reported on day one will keep growing for a week as orders are attributed, so the ACoS visible during the event overstates the true figure. Decisions are made on clicks, spend and stock, which are current, not on ACoS, which is not.
After: step down, do not cliff
Read this flowchart as text
- Event ends
- Days 1–3: hold bids, lower budgets to 120–150% of pre-event
- Days 4–7: step bids down 10% a day toward pre-event levels
- Organic rank on target terms held or improved?
- Return to normal bids. Keep rank with lower spend
- Hold bids on slipping terms another week
- Week 2–3: reset targets from post-event conversion data
Demand does not return to baseline the day after Prime Day; it tapers over one to two weeks as shoppers who browsed come back to buy and as the rank gained during the event keeps producing organic sales. Cutting bids and budgets to pre-event levels on the morning after loses that tail and can drop the rank you paid to build. Step down over a week, watching rank on the target terms, and hold longer on any term that slips.
Two to three weeks after the event, the account has new data: more reviews, a higher conversion rate on products that performed, new search terms from the event's traffic. That is when targets are reset and the search term report is harvested for the terms the event surfaced. The full event plan from four weeks out to the post-event review is E4 · Prime Day, Black Friday and Q4.
What Prime Day is not for
It is not the time to launch a product with no reviews; the traffic is expensive and the listing cannot convert it. It is not the time to restructure campaigns; changes made during the event cannot be read. And it is not the time to test creative, because everything else is changing at once. The event rewards accounts that were ready, and the readiness work is described alongside the Q4 version in Q4 Amazon PPC Strategy: Black Friday to New Year.
Frequently asked questions
When should I start preparing PPC for Prime Day?
Four weeks before. Stock has to be in fulfillment centers, deals submitted within Amazon's deadlines, rank pushed on target terms and budgets raised before the event. Preparation that starts the week before is limited to budgets and alerts.
How much should I raise bids for Prime Day?
Set a ceiling per campaign group before the event, based on the event ACoS band you are willing to accept, and hold bids inside it. Many accounts see CPCs rise sharply during the event. Chasing them beyond the ceiling rarely pays back.
Should I lower bids the day after Prime Day?
Not sharply. Demand tapers over one to two weeks, and the rank gained during the event keeps producing sales. Step bids down about 10% a day from day four, watching organic rank on target terms, and hold on any term that slips.
Is Prime Day worth it without running a deal?
Traffic rises across Amazon during the event, and listings without a deal still see more sessions. Whether the extra traffic converts at an acceptable cost depends on the category and how many competitors have deals. Products with a strong offer and good rank often benefit; products competing against heavy discounts often see conversion fall.