Entrepreneurial Developer that builds websites for Clients is wondering what happens if a client doesn't pay for their ec2 instance?

Hi, I'm pretty new to AWS, I know the basics of deploying with an EC2 instance with the help of apache2 and pm2. I was trying to price out how much it would cost to deploy a site on a yearly basis based off of what compute power the client wants. Next thing I got to thinking what if a customer doesn't pay me to take care of the bill? That would suck to have my account disabled because of that. A few work arounds I have thought of is: Should I just go about creating new AWS accounts and setting them up for my clients so they are responsible for that bill? Should I charge a security deposit? With the above I was thinking maybe to multiply the charges by 1.1* until the cost of the security deposit is matched to return that security deposit. Or is there a different solution that I'm not aware of?