AI expense tracker: Telegram voice/photo/text to sheets

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Why I built this? (The Problem) Most expense tracker apps (like Money Lover, Spendee, or Wallet) have a common friction point: Data Entry . You have to unlock your phone, find the app, wait for it ...

Best for

Personal Productivity automation workflows
AI Chatbot automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.googlesheets, n8n-nodes-base.if, n8n-nodes-base.switch, n8n-nodes-base.code, n8n-nodes-base.set, @n8n/n8n-nodes-langchain.googlegemini, n8n-nodes-base.telegram, n8n-nodes-base.telegramtrigger

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Cuong Nguyen.

Original n8n.io source

1.1 Workflow description

Title: AI expense tracker: Telegram voice/photo/text to sheets
Workflow name: AI expense tracker: Telegram voice/photo/text to sheets

Why I built this? (The Problem)

Most expense tracker apps (like Money Lover, Spendee, or Wallet) have a common friction point: Data Entry. You have to unlock your phone, find the app, wait for it to load, navigate menus, and manually select categories. It’s tedious, so we often forget to log small expenses.

I wanted a solution that lives where I already spend my time: Telegram. This workflow allows you to log expenses in seconds—just by sending a text, a voice note while driving, or a photo of a receipt. No UI navigation required.

Comparison: This Workflow vs. Traditional Apps

Feature	Traditional Expense Apps	This n8n Workflow
Data Ownership	Data is locked in their proprietary database.	100% Yours. It lives in your Google Sheet. You can export, pivot, or connect it to Looker Studio.
Input Speed	Slow. Requires multiple taps/clicks.	Instant. Send a text/voice/photo to a Telegram bot.
Flexibility	Rigid categories & logic.	Infinite. You can customize the AI prompt, categories, and currency logic.
Cost	Often requires monthly subscriptions for premium features.	Low Cost. Runs on your n8n instance + Gemini Flash API (which is currently free/very cheap).
UI/UX	Beautiful, pre-built mobile dashboards.	Raw Data. You view data in Google Sheets (though you can build a dashboard there)

Key Features

Multi-Modal Input: Just send what you have. -- Text: "Lunch 50k, Taxi 30k" (Splits into 2 rows). -- Voice: Speak naturally, AI transcribes and extracts data. -- Photo: OCRs receipts and parses details.
Global Currency Support: Uses Gemini AI to intelligently detect currency. You can set a default currency (e.g., USD, VND) in the Config node.
Smart Extraction & Categorization: -- Automatically splits multiple items in one message (e.g., "Lunch 20k and Grab 50k" → 2 separate rows). -- AI automatically assigns categories (Food, Transport, Bills, etc.) based on the item name.
Budget Management: Use the command /add budget 500 to instantly top up your monthly budget.
"Quiet" Reporting: Instead of spamming you after every message, the system waits for 30 minutes of inactivity before sending a daily summary report (Debounce logic).

Setup Instructions

1. Prerequisites

Google Sheet: You MUST make a copy of this template: [Google Sheet Template here]
n8n Data Table: This workflow requires a Data Table named ReportTokens for the reporting feature. Please read the setup guide below. Setup Guide: AI Expense Tracker

2. Configure the Workflow

Credentials: Connect Telegram, Google Sheets, and Google Gemini (PaLM).
Config Node: Open the CONFIG - User Settings node and update these fields.

-- spreadsheet_id: The ID of your copied Google Sheet -- sheet_gid_dashboard: The ID of your sheet Dashboard -- sheet_gid_budget: he ID of your sheet Budget_Topups -- currency_code: Your currency code (e.g., USD, EUR, VND). -- currency_symbol: Your currency symbol (e.g., $, €, ₫). -- locale: Your locale for number formatting (e.g., en-US, vi-VN).
Data Table: Create a table in n8n with columns: chat_id, report_token, updated_at (All type: String). Link this table to the relevant nodes in the workflow.

3. Usage

Log Expense: Send "Coffee $5" or a photo.
Add Budget: Send command /add budget 1000

Need Help or Want to Customize This?

Contact me for consulting and support: Email: [email protected]

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Google Sheets: Get Rows (Dedup lookup)

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

Block 2 - IF (Is Duplicate?)

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 3 - Switch (Voice/Photo/Text)

Type / Role: n8n-nodes-base.switch - switch
Config choices: Version 3.4

Block 4 - Code (Restore Telegram Payload)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 5 - Set (Text Context)

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 6 - Google Gemini Chat (Text → JSON)

Type / Role: @n8n/n8n-nodes-langchain.googleGemini - googleGemini
Config choices: Version 1

Block 7 - Code (Parse Gemini JSON)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 8 - Code (Split expenses to items)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 9 - Google Sheets → Append row(s)

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

Block 10 - IF (Has expenses?)

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 11 - Set (Photo Context)

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 12 - Code (Pick Best Photo)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 13 - Code (Normalize Gemini Image Output)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 14 - Telegram → Send Error Message and wait for response

Type / Role: n8n-nodes-base.telegram - telegram
Config choices: Version 1.2

Block 15 - Telegram → Send Final Message

Type / Role: n8n-nodes-base.telegram - telegram
Config choices: Version 1.2

Block 16 - Google Gemini (Analyze Image)

Type / Role: @n8n/n8n-nodes-langchain.googleGemini - googleGemini
Config choices: Version 1

Block 17 - Set (Voice Context)

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 18 - Telegram → Get Voice File

Type / Role: n8n-nodes-base.telegram - telegram
Config choices: Version 1.2

Block 19 - Telegram → Get Image File

Type / Role: n8n-nodes-base.telegram - telegram
Config choices: Version 1.2

Block 20 - Google Gemini (Analyze Audio)

Type / Role: @n8n/n8n-nodes-langchain.googleGemini - googleGemini
Config choices: Version 1

Block 21 - Code (Normalize Gemini Audio Output)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 22 - Code (Normalize Gemini Text Output)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 23 - Switch (Command Router)

Type / Role: n8n-nodes-base.switch - switch
Config choices: Version 3.4

Block 24 - Code (Parse Budget Amount)

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Showing the first 24 of 47 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow	AI expense tracker: Telegram voice/photo/text to sheets
Complexity	advanced
Nodes	47
Categories	Personal Productivity, AI Chatbot
Author	Cuong Nguyen
Published	22 Dec 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/12006/12006.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Personal Productivity workflows AI Chatbot workflows

Frequently asked questions

What does AI expense tracker: Telegram voice/photo/text to sheets do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Personal Productivity, AI Chatbot use case.

Cuong Nguyen

4 workflows

Nodes

n8n-nodes-base.googlesheets n8n-nodes-base.if n8n-nodes-base.switch n8n-nodes-base.code n8n-nodes-base.set @n8n/n8n-nodes-langchain.googlegemini n8n-nodes-base.telegram n8n-nodes-base.telegramtrigger

Complexity

advanced

Published 22 Dec 2025

Likes 0

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Install path: /data/workflows/12006/12006.json

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AI expense tracker: Telegram voice/photo/text to sheets

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Why I built this? (The Problem)

Comparison: This Workflow vs. Traditional Apps

Key Features

Setup Instructions

Need Help or Want to Customize This?

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Google Sheets: Get Rows (Dedup lookup)

Block 2 - IF (Is Duplicate?)

Block 3 - Switch (Voice/Photo/Text)

Block 4 - Code (Restore Telegram Payload)

Block 5 - Set (Text Context)

Block 6 - Google Gemini Chat (Text → JSON)

Block 7 - Code (Parse Gemini JSON)

Block 8 - Code (Split expenses to items)

Block 9 - Google Sheets → Append row(s)

Block 10 - IF (Has expenses?)

Block 11 - Set (Photo Context)

Block 12 - Code (Pick Best Photo)

Block 13 - Code (Normalize Gemini Image Output)

Block 14 - Telegram → Send Error Message and wait for response

Block 15 - Telegram → Send Final Message

Block 16 - Google Gemini (Analyze Image)

Block 17 - Set (Voice Context)

Block 18 - Telegram → Get Voice File

Block 19 - Telegram → Get Image File

Block 20 - Google Gemini (Analyze Audio)

Block 21 - Code (Normalize Gemini Audio Output)

Block 22 - Code (Normalize Gemini Text Output)

Block 23 - Switch (Command Router)

Block 24 - Code (Parse Budget Amount)

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions