Payment terms need to be clear before work begins. The best time to set expectations is when you’re signing the client, not after you’ve delivered the work. State your terms in your contract or engagement letter. Whether that’s Net 15 or Net 30, make sure clients know the rules upfront so you’re in a stronger position when it’s time to collect.

Send invoices immediately after work is complete. The longer you wait to invoice, the longer you wait to get paid. If you finish a project on Friday, send the invoice that afternoon. Waiting until the end of the month adds unnecessary delay and signals that payment isn’t urgent to you either.

Make your invoices clear and impossible to misunderstand. Put the due date somewhere prominent, not buried in fine print. Describe what you did in plain language so the client remembers the value they received. Include a project name or reference number they’ll recognize. Confusing invoices lead to “I’ll deal with this later” and later often means much later.

Offer multiple payment methods. Some clients pay faster with credit cards. Others prefer ACH transfers. If you only accept checks, you’re waiting for someone to write one, find an envelope, and mail it. Online payment options through QuickBooks or similar platforms let clients pay the same day they see the invoice.

Set up automatic reminders. Most accounting software can send payment reminders before and after the due date. A friendly reminder a few days before catches clients who intend to pay but need a nudge. A follow-up after the due date reminds those who let it slip. Professional invoicing and payment tracking includes these reminders so you’re not manually chasing every invoice.

Follow up personally when automated reminders don’t work. A quick email or phone call after an invoice goes 7-10 days past due shows you’re paying attention. Many late payments happen because the invoice got buried in someone’s inbox, not because the client is avoiding you. A direct and polite follow-up often gets the payment moving.

Track your aging receivables weekly. Know which invoices are current, which are 30 days out, and which are getting older. If you’re not watching these numbers, you won’t notice a problem until it becomes a bigger problem. Bookkeeping for service-based businesses and nonprofits includes keeping an eye on what’s owed to you, not just what you owe others.

Consider deposits or milestone payments for larger projects. Collecting a portion upfront reduces your risk and gets the client used to paying before all the work is done. For ongoing services, monthly billing with consistent due dates creates a rhythm clients get used to.

The goal isn’t just sending invoices. It’s creating a system where payments come in predictably without constant effort on your part. Clear terms, professional invoices, easy payment options, and consistent follow-up handle most slow-pay situations without any awkward conversations.