By Ted Gibson — RippleEffect
Amazon dayparting means advertising by hour rather than by day, and the honest answer to how you do it is narrower than the advice suggests. Amazon's own controls will turn your spend up at an hour you choose, and they will not turn it down. Schedule-based budget rules increase a campaign budget by a percentage across the period you set. Schedule bid rules increase bids inside a window. Everywhere Amazon documents either of them the verb is increase, and we could not find an Amazon-owned page describing a scheduled decrease of anything. That is the gap between what dayparting advice assumes you can set and what the console actually offers, and it changes the shape of the job rather than cancelling it. This is written for a brand owner doing £20,000 a month or more on Amazon UK, or $50,000 a month or more in the US, where a single hour of spend is worth arguing about. One boundary before the rest: this is about the controls themselves. What to do when the numbers come back wrong is a separate question, and what the account should be made of is another.
You are probably dayparting already, and you did not choose the hours
Start with what a daily budget is, because it is not the thing it looks like. Amazon's budget guide calls it "the maximum amount you will spend on running your ad campaign", and then two sentences later says your daily budget "is averaged over the course of a calendar month" and that you "could spend less than or up to 25% more than your average daily budget on any given day". Its worked example is a $10 budget taking $12.50 on a busy day and settling at $300 across the month, and the arithmetic reads the same in sterling. Both sentences sit on the same page under the same heading, and the second one is the operative one. That guide is also out of date against Amazon's own policy. A launch note of 9 May 2023 says Amazon has "updated our daily budgeting policy for Sponsored Products, Sponsored Brands, and Sponsored Display, allowing you to spend up to 100% more than the average daily budget on any given day", set from the Settings tab in the console, with 25% or 100% the two choices, and the change effective worldwide. So the number in the box is a monthly commitment wearing a daily label, its daily ceiling is either a quarter above it or double it depending on a setting most advertisers have never opened, and Amazon's own evergreen guide still shows the older figure.
Then add how that money leaves. The same guide says daily budgets "are spent as quickly as possible, because all available impressions for your ads to show to relevant shoppers are taken", so a smaller budget "could be spent in a few minutes if there are a large number of shoppers engaging". Nothing paces it across the day. And once the money is gone, "your ads won't be eligible to show until the next day, at midnight when the daily budget resets". Put the two together and any campaign that regularly goes out of budget is already running a daypart: live from midnight until the budget is exhausted, dark after that. Nobody chose those hours. The auction did. So before you buy anything that promises hourly control, find the hour your campaigns stop. If most of them are dark by mid-afternoon, the hours are downstream of a budget decision, and an account carrying hundreds of separate small budgets has a structural version of the same problem.
What the console actually permits
Budget rules come in two kinds and Amazon describes both as increases. Schedule-based rules "will increase your campaign budget by the percentage you specify, during the date range you set". Performance-based rules raise a budget when a campaign clears a threshold you set on return on ad spend, click-through rate or conversion rate. On 30 November 2023 Amazon added the hour to the schedule side. Its launch note reads: "We've added hours of day for schedule-based budget rules for Sponsored Ads campaigns. Now you can set up budget rules that increase budget at specific times of day." That sits on top of the days of the week and date ranges already on offer. Amazon's current help article on creating budget rules puts a boundary around it that matters to anyone selling in more than one country: "Hours of day scheduling for budget rules is currently only available in the US, CA, UK, IN, and JP marketplace." A British brand has the control. The same brand's German, French, Italian and Spanish accounts do not, so a rule you write once does not travel across a European account the way the rest of your campaign settings do.
The bidding side works the same way and reaches further. Schedule bid rules launched on 6 November 2023 so that advertisers "can set up bid rules that increase bids at specific times of the day, days of the week, and date ranges", and that announcement names a wider list of countries than the budget one: the United States, Canada and Mexico, Germany, Spain, France, Italy and the United Kingdom, and India. It also names one ad type. Schedule bid rules are a Sponsored Products feature, and none of the pages ranking for this question tells you that, because they all write about "your campaigns" as though Sponsored Brands and Sponsored Display came with it. Amazon's own worked example of the feature is a rule lifting bids by 10% on Saturday and Sunday evenings, between 5 and 9pm. The single hour-of-day scenario Amazon chose to write down is a raise on hours that were already the good ones. Native dayparting is therefore a different exercise from the one the guides describe. You cannot cut the night. You can pick a baseline you are content to spend in your worst hour and lift it for your best, so the real decision is the number you put in the box on day one rather than the schedule you bolt on afterwards. That is a colder decision than it sounds, because the baseline you would accept at three in the morning is usually well below the one you are running now.
Hourly data for everyone, an hourly lever in one direction
This asymmetry is the whole reason the question gets answered by software. Amazon publishes the data generously. Amazon Marketing Stream is "a push-based messaging system that delivers hourly Amazon Ads campaign metrics and information on campaign changes in near real-time through the Amazon Ads API", covering Sponsored Products, Sponsored Brands, display and DSP, and Amazon's own stated use for it is "automating hourly bids through the Amazon Ads API". The measurement is hourly and open to anyone integrated with the API. The downward lever sits on the far side of that integration. Which is why page one for this question is Scale Insights, SellerApp, Jungle Scout, Seller Labs, Xnurta, Pacvue and Trellis: seven results, not one of them an agency, because what is being sold is the control Amazon left out of the console. That is a fair trade rather than a racket, as long as you know you are buying a lever and not a report.
It is worth reading those pages carefully, because two of the seven describe the console incorrectly and both errors lean the same way. Pacvue writes that "Amazon doesn't natively support dayparting within its Advertising Console although 3rd party tools like Pacvue's Amazon API integration helps you automate the process of dayparting", on a page its own structured data dates to 19 December 2024, thirteen months after Amazon shipped schedule bid rules. SellerApp says of budget rules that "you can't set up rules on the account level or on an hourly basis", a few lines after walking the reader through building one. Hourly is exactly what a British advertiser can set. Only Xnurta states the real limit and states it correctly: Amazon's console "introduced a dayparting feature in 2023, providing some level of bid scheduling. However, this tool doesn't allow for automatic bid decreases." The constraint is direction, not existence, and the difference costs money in one specific way. A reader who believes the console cannot do this at all will buy software to perform a job the console would have done for nothing.
Amazon publishes two numbers for Marketing Stream on that same page, and they are not the same kind of number. The first is an average: "partner-managed advertisers who used Amazon Marketing Stream for their sponsored ads campaigns saw an average 5% increase in ROAS over the next six months, compared to those who did not use it", footnoted as Amazon internal data, worldwide, 2023. The second is a case study a few paragraphs below, a UK greens supplement launch where hourly figures were used to raise bids in busy hours and cut them when traffic slowed, and where ACOS fell 85% while conversion rose 124%. Both belong to Amazon. One describes a population and the other describes an account chosen because it worked. The guides ranking for this query quote the second kind of number and none of them quotes the first. Plan against the 5%.
The arithmetic before the subscription
Do that sum in your own figures before you shop. Five per cent better return on ad spend is not five per cent more revenue, it is the same money working slightly harder. A brand spending £6,000 a month at a return of 4 is buying £24,000 of ad-attributed sales, and 5% of that is £1,200 a month; the identical arithmetic on $6,000 and $24,000 gives $1,200. Real money, and not a transformation, and it has to cover the tool, the integration and the fortnight of somebody's attention that goes into writing rules and then watching them. If it clears that bill, hourly work is a reasonable thing to buy next. If it does not, the hours were never your constraint. Our own view, and it is a view rather than a measurement, is that the second case is much the more common one: campaigns going dark at two in the afternoon on budgets nobody has revisited, which is a free fix that needs no subscription at all. A free account audit finds the hour your spend stops and puts the rest of the account in priority order behind it, and what the work costs after that is published.