Start by telling the client that it's very important that you get paid. I know this seems obvious but maybe he's just very busy or absent minded. Send these reminders twice a week. Don't be shy or indirect at all.
If this doesn't work, have a collections lawyer send a letter. I once had someone refusing to pay a six figure invoice, and I got paid three days after a letter from a collections lawyer.
But please, communicate super clearly with the client first. Tell them if you don't get paid you can't keep working on the project. If you haven't already spelled this out clearly to them, it's possible that the guy is just disorganized. Maybe he's even here on Hacker News discussing to do lists and tips for overcoming procrastination. Be super clear about your needs.
If this doesn't work, have a collections lawyer send a letter. I once had someone refusing to pay a six figure invoice, and I got paid three days after a letter from a collections lawyer.
But please, communicate super clearly with the client first. Tell them if you don't get paid you can't keep working on the project. If you haven't already spelled this out clearly to them, it's possible that the guy is just disorganized. Maybe he's even here on Hacker News discussing to do lists and tips for overcoming procrastination. Be super clear about your needs.