Any budget can fit into a Pay-Per Click Internet marketing program. Pay per click is a type of advertising that is used on search engines, example www.Google.com. As the advertiser, you will bid on keywords that describe your business, your services, your products, or your target audience. You will only pay when the user clicks onto the ad, which will redirect the user to your website. Most programs monitor click-throughs to your site based on a pre-determined monthly budget or a pre-determined per-click budget.
So basically every time someone click on your ad, you will be charged your bid price. Just remember, that if you want to be on the top of the list, you will need to bid higher than your competitors!