Introduction
Late payments hurt cash flow. Manual chasing stretches DSO and drains good teams. The usual cause is a clunky sequence of steps that no one loves. Someone raises an invoice, someone else sends reminders, notes go into the CRM, and another person reconciles payment. Spreadsheets multiply. Errors creep in. Customers feel nagged.
Agentic AI invoicing changes that dynamic. Agents plan, remember context, call tools, and keep going when things get messy. They do more than draft one email—they run the full loop and know when to loop you in. Deloitte predicts that 25% of companies using generative AI will pilot agents in 2025, rising to 50% in 2027[2]. As McKinsey notes, agents can automate complex business processes by combining autonomy, planning, memory, and integration[1]. This guide walks you through a practical 48-hour build that fits POPIA rules and uses channels your customers actually answer, like WhatsApp and SMS.
Agentic AI Invoicing Workflow: Example Message Templates
Email (Day 3, friendly):
Subject: Invoice [INV-12345] - Payment link inside
Hi [First name], a friendly reminder that invoice [INV-12345] for R[amount incl. 15% VAT] is due on [Due date]. You can pay securely here: [PayFast link]. If you have already paid, thank you. Please ignore this note. Questions? Reply directly to this email.
WhatsApp (Day 7, neutral):
Hi [First name]. Quick reminder for invoice [INV-12345], R[amount]. Pay: [PayFast link]. If there is an issue, reply here. To opt out of reminders on WhatsApp, reply STOP.
SMS (Day 14, firm but respectful):
Reminder: Invoice [INV-12345], R[amount] incl. VAT, is overdue. Pay: [Paystack link]. Need help? Call [Support number]. Opt out: reply STOP.
Final copy should reflect your brand voice, POPIA consent language, and South African tone norms. For practical guidance, IBM highlights 2025 as the year of AI agents—balanced with realistic oversight[4].