How to Automatically Alert Slack When a New Xero Invoice Is Created Using Make.com

Introduction

Finance teams lose precious time chasing invoices and reconciling invoices when humans manually monitor dashboards and post updates in Slack. A lean Make.com workflow that watches Xero for new invoices and pushes a short, useful alert to Slack can remove a lot of that friction. You get real time visibility into cash flow without the busywork.

In this post you’ll see a simple end to end pattern: a new Xero invoice triggers Make.com, which posts a concise Slack alert with the essentials and optionally logs the invoice to a Google Sheet for auditability. By the end you’ll have a repeatable baseline you can extend with approvals, digests, or automation escalations if needed.

If you want to see how we’ve solved similar patterns for other tooling, take a look at our Typeform to HubSpot lead sync guide and our Calendly to ClickUp task flow for routing by event type. See those patterns in our broader automation library:

• Typeform to HubSpot lead sync
• Calendly to ClickUp task

What You'll Need

• A Xero account with access to invoices via API
• A Slack workspace and the channel where you want to post alerts
• A Make.com account with connections to Xero and Slack
• (Optional) A Google Sheets file to log invoices for auditing
• A basic test invoice you can create in Xero to verify the setup

Note: If you plan to log to Google Sheets, you’ll need a Google account connected to Make.com with access to the target sheet.

How It Works (The Logic)

Trigger: A new invoice is created in Xero. Action: Make.com reads the invoice data, posts a Slack message with an at a glance summary, and optionally logs the invoice in Google Sheets for traceability. This keeps your finance and ops teams aligned the moment an new invoice arrives.

Optional enhancements you can add later include routing high value invoices to a separate Slack channel or sending a follow up reminder when the invoice becomes overdue.

Step-by-Step Setup

1. Create a new Scenario in Make.com and set the trigger to watch Xero invoices

• In Make.com, create a new Scenario and choose the Xero module. Select the trigger that fires on new invoices.
• Connect your Xero account and test the trigger with a real or test invoice to pull representative data.

2. Add a Slack action to post the alert

• Add Slack module and choose the action "Post a Message" to your target channel.
• Craft a concise message such as: New Xero Invoice {{invoice_number}} for {{customer_name}} {{currency}}{{amount_due}} due {{due_date}}. Status: {{status}}. View: {{invoice_url}}
• Map the fields from the Xero payload into the template.

3. Optional: log the invoice to Google Sheets for auditability

• If you want an auditable trail, add Google Sheets module "Add a Row".
• Map fields such as invoice_number, customer_name, amount_due, currency, due_date, status, and invoice_url. Include a timestamp for traceability.

4. Add a simple de-duplication guard (optional but recommended)

• To prevent duplicate Slack posts due to retries, implement a small dedupe check before posting. You can store the last processed invoice_id in Make.com or in a Google Sheet and skip repeats.

5. Test end to end

• Create a test invoice in Xero and verify the Slack alert appears as expected.
• Confirm the Google Sheets log row (if enabled) contains the correct fields and a timestamp.

6. Turn on the scenario and monitor

• Activate the scenario and watch the first few runs for any data mapping issues or Slack permission problems.
• If you see timing skew for due dates, adjust the time zone handling in Make.com to align with your team’s locale.

Real-World Business Scenario

A services company uses this exact pattern to keep cash flow visible. When a new invoice is generated, the finance channel in Slack receives a tight, readable notification with the invoice number, customer, amount due, and a direct link to view the invoice. The automation eliminates manual follow up and speeds up cash collection, especially for high value clients. For teams that also need a formal audit, the Google Sheets log provides a centralized ledger of invoices seen by the Slack alerts.

For broader pattern context, we’ve covered similar data pipelines and CRM integrations in other guides such as Typeform to HubSpot lead sync and Calendly to ClickUp task.

Common Variations

• Escalate high value invoices to a leadership channel in Slack with a dedicated message format.
• Add a follow up reminder in Slack or via email if an invoice remains unpaid after a threshold period.
• Extend with a Google Apps Script or a small Make.com route to push the invoice data into a dashboard or BI tool for rate of invoice issuance and aging analysis.

What This Means for Your Team

This simple flow gives your team real time visibility into new invoices and reduces manual follow up by presenting the right data in the right channel. It also creates a clean audit trail if you enable the log step. If you want to scale this across billing and finance workflows, Olmec Dynamics builds these kinds of automations for real businesses. Learn more about our work at the following link: Olmec Dynamics.

If you’d like a tailored version of this setup for your Xero, Slack, and Make.com stack, we’re happy to help architect and deploy it for you. See how we approach end-to-end automation across the finance and operations stack in our other posts and case studies.