How do I invoice clients and get them to pay on time?

Clear invoicing and firm terms are what separate paid freelancers from chronically unpaid ones. Send a professional invoice promptly after the work, listing the services, amount due, due date, and accepted payment methods. State short, explicit terms — "net 15" or "due on receipt" beats a vague "net 30" — and consider a deposit or milestone payments for larger projects so you're not financing the whole job. Make paying easy by accepting cards or bank transfers, and add a late-fee clause to your contract to give slow payers a reason to act. When a payment slips, follow up immediately and politely; most late payments are oversights, not refusals. Invoicing software can automate sending, reminders, and tracking so nothing falls through the cracks. Above all, get terms in writing before you start work, so expectations are set on day one.