Automate Timesheet to Invoice Conversion with OpenAI, Gmail & Google Workspace — n8n ワークフロー

複雑度 トリガー40個のノード🏷️ Invoice Processing作成者:DIGITAL BIZ TECH

概要

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

使用ノード

Google SheetsHTTP RequestGoogle DriveCodeOpenAI

ワークフロープレビュー

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

仕組み

  1. 1

    トリガー

    このワークフローは トリガー トリガーで開始します。

  2. 2

    処理

    データは 40 個のノードを流れます, connecting code, gmailtrigger, googledrive。

  3. 3

    出力

    ワークフローは自動化を完了し、設定された宛先に結果を配信します。

ノード詳細 (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

このワークフローのインポート方法

  1. 1右側の JSONをダウンロード ボタンをクリックしてワークフローファイルを保存します。
  2. 2n8nインスタンスを開き、ワークフロー → 新規 → ファイルからインポート に進みます。
  3. 3ダウンロードした automate-timesheet-to-invoice-conversion-with-openai-gmail-google-workspace ファイルを選択し、インポートをクリックします。
  4. 4各サービスノードの 認証情報(APIキー、OAuthなど)を設定します。
  5. 5ワークフローをテスト をクリックして動作確認し、有効化します。

またはn8nの JSONからインポート に直接貼り付け:

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

インテグレーション

codegmailtriggergoogledrivegooglesheetshttprequestifmergeopenaisetsplitinbatches

このワークフローを取得

ワンクリックでダウンロード&インポート

JSONをダウンロードn8n.ioで見る
ノード40
複雑度high
トリガーtrigger
カテゴリInvoice Processing

作成者

DIGITAL BIZ TECH

DIGITAL BIZ TECH

@dbt

タグ

codegmailtriggergoogledrivegooglesheetshttprequestifmergeopenaisetsplitinbatches

n8n初めてですか?

n8nは無料のオープンソースワークフロー自動化ツールです。セルフホストまたはクラウド版をご利用いただけます。

n8nを無料で始める →

Related Invoice Processing Workflows

COCOEMEX+5
medium

Automate Custom QuickBooks Invoice PDFs & Email with n8n

Standard accounting templates often fail to reflect a premium brand identity. This sophisticated n8n workflow bridges the gap between financial record-keeping and professional client presentation. By moving beyond the native limitations of QuickBooks Online, this automation enables businesses to generate high-end, multi-page PDF invoices that align perfectly with their corporate styling. The process begins the moment a new invoice is generated in QuickBooks, triggering a webhook that captures real-time billing data. The workflow then utilizes advanced HTML-to-File conversion and custom Code nodes to structure data into a polished, branded layout. It handles complex logic such as line-item merging and multi-page formatting automatically. Once the document is rendered, the system bypasses generic 'no-reply' senders by routing the finalized PDF through your preferred email provider. This ensures a seamless, white-labeled experience for your clients while eliminating the manual overhead of exporting, styling, and attaching files. Ideal for agencies and service providers, this flow guarantees that your most frequent touchpoint—the bill—is as professional as your work. **Common Use Cases:** - High-end creative agencies requiring bespoke, white-labeled billing documents for premium clients. - Automated recurring subscription billing where custom tax disclosures or localized branding are required. - Service-based businesses needing to attach dynamic project reports or terms of service directly to QuickBooks invoices.

🔗 Webhook·12 nodes