When you create a Bing Ads campaign, one of the first things you have to do is set a budget. Your budget tells Bing Ads the limit you want to spend on your campaign. You can set a daily budget or monthly budget. When you reach your budget, Bing Ads will stop displaying your ads until the next day or month.
Your budget helps keep your online advertising costs under control. By carefully selecting the correct budget amount and type (daily or monthly), you spend only as much as you want to.
If you don't want to spend more than $1000 per month on your Bing Ads campaign, simply choose the "Monthly" budget type and set that budget to $1000. Once your reach $1000 in clicks, Bing Ads will stop displaying your ads until the next month.