Prime Big Deal Days lands tomorrow, October 6, and runs through October 7. If you are an Amazon seller, you already know what the next 48 hours will do to your ad account: traffic spikes, budgets cap out by 10 a.m., and your bids are either too low to compete or too high to stay profitable. Most sellers handle this by panicking and cranking every bid up 50 percent the morning of. That is the wrong move, and it is also the most common one.
The sellers who come out of Prime Big Deal Days with a better TACoS than they went in with are not the ones who spent the most. They are the ones who moved in phases, protected their proven winners, and left everything else alone. Here is the actual playbook.
The 48-hour math nobody explains
Amazon’s own numbers put this event at more than 35 categories, with new deals refreshing three times a day at midnight, 8 a.m., and 1 p.m. Pacific. That refresh pattern matters for ad strategy because traffic does not arrive evenly. It comes in waves tied to those refresh times, and your budget needs to be built to survive all three waves, not just the morning one.
Think of the week in five phases instead of one single event day:
- Normal, running through October 3: keep bids as they are, but pull a baseline CPC report so you have something to compare against later.
- Ramp, October 4 and 5: raise budgets 1.5 to 2.5 times normal to catch early browsing traffic before the event opens.
- Event, October 6 and 7: run at 2 to 3 times normal budget. A profitable campaign running out of budget at noon on the biggest shopping day of the quarter is the single most expensive mistake you can make this week.
- Cooldown, October 8 through 10: step back down gradually, not all at once, since residual traffic usually lingers for a couple of days.
- Analysis, October 11 onward: wait a full 14 days before judging results. Attribution on Amazon lags, and judging Tuesday’s spend on Wednesday’s report will make a winning campaign look like a loser.
Which keywords actually deserve the extra budget
Blanket bid increases are how sellers torch their margin during a sale. A smarter split works better: a modest 10 percent lift across the board to keep pace with rising CPCs, and a much bigger 50 to 100 percent boost reserved only for the keywords and targets that already have a real conversion history, typically somewhere between 10 and 30 terms per catalog, not hundreds.
Before touching a single bid, calculate your break-even ACoS on whatever discount you are running for the event. A 20 percent off deal changes your margin math completely, and the average ACoS across Amazon sits around 30.67 percent right now, ranging from 19 percent in Books up to 42 percent in Clothing and Apparel. If your category runs hot, your break-even number during a discount event will be tighter than you think.
Average cost per click has also crept up to roughly $1.22, about 10 cents higher than a year ago, with Electronics running as high as $1.45 and Books as low as 38 cents. If you sell in a higher-CPC category, the percentage lift matters less than the absolute dollar amount you are willing to spend per click before the math stops working.
One more housekeeping step before the ramp: pull your negative keyword list from the last 60 days and clear out anything that spent money with zero sales. Entering the event with dead weight in your targeting just means the extra budget gets wasted on terms already proven not to convert.
The discipline part: do not touch anything mid-event
This is where most sellers go wrong, not the bid math. Once the event starts, the instinct is to check dashboards every hour and start pausing anything that looks like it is underperforming. Resist that instinct. Amazon’s attribution window means a sale that happened at 9 a.m. might not show up in your reports until that evening, or later. A campaign that looks dead at noon on October 6 may have already converted twice while you were staring at the dashboard.
Set up automated rules or dayparting ahead of time so budget increases happen on a schedule instead of requiring you to babysit the account for 48 hours straight. Prioritize top-of-search placement during the event itself, since that is where the highest-intent traffic shows up when shoppers are actively comparing deals. Save the pause and cut decisions for after October 21, once you have a full two-week attribution window to look at.
After the dust settles: harvest and retarget
The work that actually pays off happens after the event, not during it. Pull your search term reports from the event window and harvest anything that converted into exact-match campaigns going forward. Prime Big Deal Days traffic tends to surface search terms you would never have found through normal keyword research, because shoppers behave differently when they are actively hunting for a deal.
Starting October 8 through 14, layer in Sponsored Display retargeting aimed at everyone who viewed your listing during the event but did not buy. A chunk of Prime Big Deal Days browsers are doing early holiday research, not necessarily buying on October 6. Catching them again a week later while your product is still fresh in their browsing history is one of the higher-return moves available this time of year.
When you finally sit down to evaluate the event around October 21, look at TACoS alongside ACoS, not ACoS alone. A lot of Prime Big Deal Days value shows up as organic sales lift in the days after the event, and a pure ACoS read will make the event look less profitable than it actually was.
Frequently asked questions
How much should I raise my Amazon ad budget for Prime Big Deal Days?
Most sellers running a genuine discount on the event should plan for 2 to 3 times their normal daily budget on October 6 and 7 specifically, after a smaller 1.5 to 2.5 times increase during the October 4 to 5 ramp period. The exact multiple depends on your category’s typical CPC and how aggressive your discount is.
Should I raise bids on every keyword or just my best performers?
Mostly just your best performers. A small 10 percent increase across the board keeps you competitive as CPCs rise event-wide, but save the larger 50 to 100 percent increases for the 10 to 30 keywords per catalog that already have a proven conversion history. Spreading large increases across unproven targets is the fastest way to blow your margin.
Is it safe to pause underperforming campaigns during the event?
No, not during the 48-hour window itself. Amazon’s attribution reporting lags, sometimes by a day or more, so a campaign that looks underperforming at noon may already have converted by the time the data catches up. Wait until after October 21, when you have a full 14-day attribution window, before making any pause or cut decisions.
What should I do with my ad budget after Prime Big Deal Days ends?
Step budgets back down gradually between October 8 and 10 rather than cutting them immediately, since traffic tends to linger for a few days after the event. Then shift focus to harvesting new converting search terms into exact match campaigns and running Sponsored Display retargeting against everyone who viewed your listings but did not buy.
If you want a second set of eyes on your campaign structure before October 6, or help building out the retargeting flow for after the event, Depu works with Amazon sellers on exactly this kind of PPC and growth strategy as a freelance consultant and is currently taking on new clients.
Sources:
Amazon, “Prime Big Deal Days 2026 is set for October 6-7, 2026,” aboutamazon.com
Ad Badger, “Prime Big Deal Days 2026 PPC Playbook: Bids and Budgets,” adbadger.com
Ad Badger, “Amazon Advertising Benchmarks 2026: Stats Every Seller Needs,” adbadger.com