Is an Amazon Ad Click at Midnight Worth the Same as One at 9am?
Amazon charges about the same for a click at any hour, and most sellers bid the same all day. We followed 2.1 million ad-driven purchases over two years in 14 marketplaces to see whether every hour really earns the same.
Most Amazon sellers run one bid around the clock. A click at 9 in the morning costs about the same as a click at midnight, so it feels natural to treat them the same.
But a click is only worth what it turns into. If shoppers at midnight buy less often than shoppers at 9am, one flat bid overpays at night and underpays in the morning.
We looked at two years of Sponsored Products data from our own accounts: 17.7 million clicks and 2.1 million purchases, from October 2024 to September 2026, across 14 Amazon marketplaces. Every hour is not worth the same. Not even close.
Why people think it doesn't matter
The case for one flat bid sounds reasonable. Amazon's auction sets the price of every click. If night clicks were worth less, other advertisers would bid less at night, prices would fall, and it would all even out.
There's a practical reason too. Changing bids by hour is fiddly, and most reports stop at the day. If you can't see the hours, they all look alike.
The auction doesn't even it out
If the auction priced in the time of day, night clicks would be cheap. They aren't. In our data, clicks between midnight and 6am cost about 7% more than the daily average. The cheap clicks came in the evening, about 10% under.
The price barely moved. How often a click turned into a sale moved a lot more.
A click at 8am turned into a sale 17% more often than the average hour. A click at 11pm, 27% less often. The best hour converts about 60% better than the worst, for clicks that cost about the same.
Order size follows the same clock. Morning orders were about 4% bigger than average, late-night orders about 8% smaller. Put together, a click at 8am brought in about 1.8 times the sales of a click at 11pm. Per dollar of ad spend, the best hours of the day returned about 1.6 times what the hours around 1am did.
It isn't one big seller or one lucky year
A pattern like this could come from a single large account, or from one odd season. It doesn't.
- The first year and the second year give the same curve, hour for hour.
- Every one of our larger accounts converted above its own average at 8am and 10am. All but one converted below it at 1am and at 11pm.
- Leaving out the biggest account moves no hour by more than a few points.
Europe swings harder than the US
Every large marketplace has the same shape: strong mornings, a slow fade through the afternoon, weak nights. How big the swing is depends on where you sell.
Part of the gap is the clock. Amazon runs US ad accounts on Pacific time, while American shoppers are spread over four time zones: 8am in the account is 11am in New York. That smears the US curve out. European accounts run on their shoppers' own clock, so their peaks and troughs stay sharp.
Spain's figures are the least certain of the six; it had the fewest purchases. Smaller marketplaces such as the Netherlands and Sweden didn't have enough sales to say anything on their own.
What about weekends?
Almost nothing. Weekend clicks converted about 2% worse, but they were also 3 to 4% cheaper, so a dollar spent on a Saturday earned about the same as a dollar spent on a Tuesday. If you schedule bids, schedule them by hour, not by day.
What to do
- Lower bids late at night. From about 10pm to 3am, a bid 20 to 25% below your daytime bid matches what those clicks are worth.
- Raise bids in the morning. From about 6am to 11am, 10 to 15% above is justified.
- Use your ad account's clock. That's the clock these hours are on. For US accounts it's Pacific, so the morning peak is roughly 9am to 2pm on the East Coast.
- Don't switch nights off. Night clicks still convert at about three quarters of the daily rate. Lower the bid; don't drop to zero.
- Leave weekends alone. The difference isn't worth managing.
How we tested
The data. Amazon Marketing Cloud data from our own accounts: every Sponsored Products click and every purchase Amazon credited to an ad click, from October 2024 to September 2026, in 14 marketplaces. That's 17.7 million clicks and 2.1 million purchases.
The right hour. Each purchase is counted at the hour of the click that led to it, not the hour the order was placed. The click is what you pay for, so that's the hour a bid has to price. Hours are on each ad account's own clock.
Each account against itself. For every account and hour, we compared actual purchases with what the account's own average conversion rate predicted from that hour's clicks. An account that converts at 5% and one that converts at 20% both add their shape, not their level.
The checks. Year one against year two. Half of the accounts against the other half. The biggest account left out. A resampling test for the ranges. Marketing Cloud hides very small groups to protect shoppers' privacy; less than 0.1% of purchases were hidden this way.
The limits. This is real-world data, not an experiment. Some accounts may already raise and lower bids by hour, and the extra clicks a higher bid wins can convert a little differently from the rest. It covers Sponsored Products only. And your own products may sit above or below the average.
Test it yourself.
- Pick campaigns with steady daily sales.
- Split them in two at random.
- On one half, lower bids 20% from 10pm to 3am and raise them 10% from 6am to 11am. Leave the other half alone.
- Run for four weeks, away from Prime Day and the holiday season, and change nothing else.
- Compare sales per dollar of ad spend between the two halves.
Questions or feedback? Reach out to us at [email protected].
