The cost of your Google Ad Campaign is determined by your budget settings. You can say that Google Ads can work with almost any budget. You will get charged only whenever a user interacts with your Ad like a Click or Call to your business. There is no minimum spend requirement with Google ads, and no required contract length, you can stop your Ads anytime you want. The Cost Per Click (CPC) or Cost Per Action (CPA) can vary based on a few factors.