---
title: "Monthly recurring billing and retainer invoices"
description: "Ends weekend invoicing panic for service firms, landlords, accountants and maintenance companies on monthly fixed or hourly flat fees. On the 25th the AI review"
canonical: https://automataai.hu/en/workflows/process-automation-rpa/recurring-billing-ops
language: en
publisher: Automata AI
updated: 2026-09-19
---

# Monthly recurring billing and retainer invoices

Category: Repetitive business process automation (BPA and modern AI-RPA)


Ends weekend invoicing panic for service firms, landlords, accountants and maintenance companies on monthly fixed or hourly flat fees. On the 25th the AI reviews active contracts, calculates the items (base fee + overages + contractual inflation tracking), calls the Billingo/Számlázz.hu API, issues the fee requests or final invoices, sends them to partners and sets up bank credit monitoring.

## How it works

1. Contract review on the 25th
2. Item calculation
3. Invoices issued, sent, monitored

Tools: Billingo, Számlázz.hu, n8n

Source: AI Automation Market Report and Practical Guide (2025–2026)