You pretty much have to plan on not getting it. I was sure my ex would always pay, and typically he does, but he does it on his schedule so sometimes he pays 3 months late and sometimes in advance. So, I budget 100% without it. When I get it, I evaluate where I need it most. Think of it as being reimbursed for what you already spent on your child. If he pays in advance, I might pay daycare or utilities in advance and then my budget for the next paycheck is a little easier. Or I put it into completing the baby steps, emergency fund, debt pay off etc. Just do not let child support be what keeps your lights on. Even if things are going well, it could disappear at anytime. Also, it’s different for every state, but I got my ex’s wages garnished. It took very little effort and I did it without a lawyer or child support services. My ex appreciated it because then he didn’t have to go in and write the check