Automate Timesheet to Invoice Conversion with OpenAI, Gmail & Google Workspace — Workflow n8n

Élevé complexité⚡ Déclencheur40 nœuds🏷️ Invoice Processingpar DIGITAL BIZ TECH

Aperçu

This workflow converts emailed timesheets into structured invoice rows in Google Sheets and stores them in the correct Google Drive folder structure.

It:

Listens to Gmail for timesheet attachments
Runs OCR and AI parsing
Looks up Customer and PO data from a Google Sheet
Organizes files in Client → Employee → Year folders
Reuses an existing invoice sheet or creates a new one and writes the invoice row

Quick Implementation Steps

Import the workflow JSON into your n8n instance.
Set

Nœuds utilisés

Google SheetsHTTP RequestGoogle DriveCodeOpenAI

Aperçu du workflow

OCR extraction
Sends each attachment to the OCR API and returns plain
Build invoice dates
Calculates the invoice date and due date using the time
create new year folder
Create invoice sheet
Generates the sheet name, creates a new Google Sheet, u
Write invoice row
Initializes the row structure, maps customer and timesh
Decide reuse or create sheet
Checks the merged search results. If a matching sheet e
Email intake and loop
Listens to Gmail for unread timesheet emails, splits al
Timesheet to Invoice Automation
How it works
The workflow automates converting emailed timesheets in
1. Email intake
Pulls unread Gmail messages with timesheet att
Customer and PO lookup
Looks up the sender in the Customer POs sheet and pulls
AI timesheet parsing
OpenAI reads the timesheet text and extracts employee n
Client folder discovery
Search Client Invoices folder, finds or creates the cli
## File naming and search
searches Drive for existing sheets with the employee a
Create new
create new client name, employee and year named folder
Build file names and search
Generates start based and end based file names from emp
Create invoice sheet
Generates the sheet name, creates a new Google Sheet, u
Write invoice row
append invoice rows
For new sheets, creates the sheet, sets timezone, moves
⚡
G
Gmail Trigger
Split Binary Attachments
L
Loop: Process Each Attac…
Extract Timesheet Data (…
Get Customer Info From P…
S
Set Invoice Date & Due D…
G
Generate Sheet Name (Emp…
S
Set: Invoice Range
I
If: File Already Exists?
If: Invoice Range is 15…
S
Set: File Name from Star…
Merge: Combine Folder S…
Create New Sheet
Move Created Sheet to Fi…
Set: Row Data
Sheets: Append Row
Sheets: Final Append
Sheets: Create Sheet
Sheets: Append Row1
Extract Text from Attach…
Search: Client Invoices …
Search: Client Folder by…
Search: File By Start Da…
Search: File By End Date…
Drive: Move Sheet To Fin…
S
Set: Empty Row Structure
S
Set: Spreadsheet (ID & …
Append: Final Row to Exi…
C
Check if Year Folder Exi…
Create Client Name Folder
C
Check Client Name Folder
Search: Employee Name Fo…
C
Check Employee Name Folder
Create Employee Name Fol…
Search: Year Folder
Create Year Folder
Create Current Year Folder
S
Set Timesheet JSON Fields
HTTP Request(new sheet)
HTTP Request1(create she…
40 nodes46 edges

Comment ça fonctionne

  1. 1

    Déclencheur

    Le workflow démarre avec un déclencheur déclencheur.

  2. 2

    Traitement

    Les données transitent par 40 nœuds, connecting code, gmailtrigger, googledrive.

  3. 3

    Sortie

    Le workflow termine son automatisation et livre le résultat à la destination configurée.

Détails des nœuds (40)

GO

Google Sheets

googleSheets

#1
HT

HTTP Request

httpRequest

#2
GO

Google Drive

googleDrive

#3
CO

Code

code

#4
OP

OpenAI

n8n-nodes-langchain.openAi

#5

Comment importer ce workflow

  1. 1Cliquez sur le bouton Télécharger JSON à droite pour enregistrer le fichier du workflow.
  2. 2Ouvrez votre instance n8n. Accédez à Workflows → Nouveau → Importer depuis un fichier.
  3. 3Sélectionnez le fichier automate-timesheet-to-invoice-conversion-with-openai-gmail-google-workspace téléchargé et cliquez sur Importer.
  4. 4Configurez les identifiants pour chaque nœud de service (clés API, OAuth, etc.).
  5. 5Cliquez sur Tester le workflow pour vérifier que tout fonctionne, puis activez-le.

Ou collez directement dans n8n → Importer depuis JSON :

{ "name": "Automate Timesheet to Invoice Conversion with OpenAI, Gmail & Google Workspace", "nodes": [...], ...}

Intégrations

codegmailtriggergoogledrivegooglesheetshttprequestifmergeopenaisetsplitinbatches

Obtenir ce workflow

Téléchargez et importez en un clic

Télécharger JSONVoir sur n8n.io
Nœuds40
Complexitéhigh
Déclencheurtrigger
CatégorieInvoice Processing

Créé par

DIGITAL BIZ TECH

DIGITAL BIZ TECH

@dbt

Tags

codegmailtriggergoogledrivegooglesheetshttprequestifmergeopenaisetsplitinbatches
⚡

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