Most sellers set an ad budget by feel and then wonder why results swing month to month. A cleaner approach is to start from the outcome. Decide the ad driven revenue you want, then decide the share of that revenue you can afford to spend on ads, which is your target ACoS. Multiply the two and you have a budget that matches your goal.
To use the tool, enter your target monthly ad sales and your target ACoS. The recommended monthly budget appears instantly, along with a daily figure so you can set campaign caps that pace evenly through the month. If you know your average cost per click, add it to estimate how many clicks the budget should generate.
Treat the result as a starting point, not a ceiling. As listings convert better and campaigns mature, your real ACoS usually falls below the target, which means the same budget delivers more sales. Review the numbers monthly and adjust the target as your margins and goals change.
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