Amazon campaigns start at midnight. Not when your customers wake up. Not when your category converts. Midnight. Every night, whether you like it or not.
Most sellers find out what this costs them the same way: they pull their hourly data for the first time, look at the column between 1am and 5am, and feel a little sick.
The thing people get wrong first
The advice you see everywhere is "pause from midnight to 6am and your ACoS will drop." That is sometimes true. It is also sometimes wrong, and sellers who follow it blindly without checking their data have made a real mistake.
Before you touch anything, look at your order timestamps. Go to Seller Central, pull your orders report, sort by time. If you are selling a product that people buy impulsively late at night, supplements, certain consumer electronics, things people add to cart at 11pm and checkout at 1am, your overnight hours may actually be converting. Not well, but well enough.
If you look at that data and see a column of zeros between midnight and 6am, every single day, for weeks: pause the campaigns. That money is not doing anything.
What Amazon's built-in scheduling actually does
Amazon added ad scheduling to Sponsored Products. You can find it inside Campaign Manager under the campaign settings.
Here is what it does not do: it does not pause your ads. It adjusts bids downward during the hours you select. You are still in the auction. You are still getting impressions, still getting clicks, still paying, just less per click.
That is useful. It is not the same as campaigns actually stopping.
If you want true overnight pausing, campaigns off, not just bid-reduced, you need a third-party tool or a manual process. There is no way around this with Amazon's native tools today.
The manual process and why it fails
Log in every night. Find every campaign you want paused. Toggle off. Wake up. Log in again. Toggle back on.
This works for about two weeks. Then you forget once. Then you forget on a Friday. Then you are on a trip and you forget for three days and your ACoS for the week looks like a disaster. Or the opposite: you remember to pause but forget to resume, and you miss the entire morning window, which for most categories is the highest-converting part of the day.
Manual overnight pausing is not a process. It is a good intention.
Setting up automated pausing
A dayparting rule defines when your campaigns run. You set it once. It runs every night without you.
In Off Hours, this is a 7x24 grid. Every hour of every day. Mark the hours you want campaigns active, leave the overnight hours unmarked, save the rule. Campaigns pause at 11pm and resume at 7am, or whatever window makes sense for your data, every single night.
For most categories, a reasonable starting schedule is:
Active from 6am to 11pm. Paused from 11pm to 6am.
Run it for two weeks. Then check two things: did your ACoS improve, and did your total order volume hold. If ACoS improved and orders held, the overnight hours were waste. If orders dropped, your overnight window was contributing more than it looked like.
The thing that catches people after they set it up
Budget pacing.
If your campaigns were spending gradually across all 24 hours, removing seven or eight overnight hours means the same budget now gets spent in a shorter window. Campaigns that were pacing fine will start exhausting budget before 5pm.
This is fixable. Either reduce your daily budget slightly to match the shorter active window, or set a budget rule that paces spend more deliberately across the active hours. The problem shows up in the first week and is easy to miss if you are not watching.
The other thing worth monitoring is organic rank. Running ads overnight does provide some advertising signal to Amazon's algorithm. For established products with strong organic rank, removing overnight activity usually does not matter. For products in an active launch with thin organic history, be more careful. Watch your BSR in the two weeks after you implement the pause.
The actual outcome most sellers see
Better ACoS. Same or slightly better total sales. Less anxiety about what happened while they were sleeping.
The sellers who benefit most from overnight pausing are the ones who have been running campaigns 24 hours a day on autopilot and never looked at the hourly breakdown. If that is you, pull the data today. The answer will tell you whether to pause.
If the data says pause, set up the dayparting rule and stop thinking about it. That is the point: you should not be thinking about this every night.
Off Hours runs automated dayparting schedules across your Amazon Ads accounts. Set the hours once, campaigns handle the rest. Start a 14-day free trial, no credit card required.