# GPT 4.1-mini proposal to payment lifecycle management: n8n workflow > Started by someone submitting a form, and works across Gmail and n8n data table. It hands the judgement calls to OpenAI. Source: https://millionrounds.com/workflow/gpt-4-1-mini-proposal-to-payment-lifecycle-management (Millionrounds; every figure on the page links to its filing or article) [Automation library](https://millionrounds.com/workflows) · [Money admin](https://millionrounds.com/workflows?category=Money+admin#library) # GPT 4.1-mini proposal to payment lifecycle management Started by someone submitting a form, and works across Gmail and n8n data table. It hands the judgement calls to OpenAI. 33 steps, 2 branches, 1 loop or waits: large, and worth reading before you trust it with anything live. Large Calls a model: OpenAI [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fgpt-4-1-mini-proposal-to-payment-lifecycle-management) **33 steps** Large: read it before trusting it with anything live **2** Branches: places the flow splits **1** Loop or waits **2** Services it connects to ## The flow Starts it 2 Model 12 Logic 6 Service 13 The steps in the order they run, from what starts it. - 1 **Proposal Request Form** Form trigger *Starts it* - 2 **OpenAI Chat Model** Lm Chat Open Ai *Model* - 3 **Proposal Output Parser** Output Parser Structured *Model* - 4 **OpenAI Chat Model1** Lm Chat Open Ai *Model* - 5 **Contract Output Parser** Output Parser Structured *Model* - 6 **OpenAI Chat Model2** Lm Chat Open Ai *Model* - 7 **Invoice Output Parser** Output Parser Structured *Model* - 8 **Payment Monitor Schedule** Schedule trigger *Starts it* - 9 **OpenAI Chat Model3** Lm Chat Open Ai *Model* - 10 **Forecast Output Parser** Output Parser Structured *Model* - 11 **Workflow Configuration** Set *Logic* - 12 **Generate Proposal** Agent *Model* - 13 **Generate Contract** Agent *Model* - 14 **Generate Invoice** Agent *Model* - 15 **Get Pending Invoices** Data Table *Service* - 16 **Revenue Forecasting** Agent *Model* - 17 **Store Proposal Request** Data Table *Service* - 18 **Store Generated Proposal** Data Table *Service* - 19 **Store Contract** Data Table *Service* - 20 **Store Invoice** Data Table *Service* - 21 **Check Payment Status** Code *Logic* - 22 **Store Revenue Forecast** Data Table *Service* - 23 **Send Proposal for Approval** Gmail *Service* - 24 **Send Invoice to Client** Gmail *Service* - 25 **Check If Payment Overdue** If *Logic* - 26 **Prepare Follow-up Task** Set *Logic* - 27 **Wait for Approval** Wait *Logic* - 28 **Send Payment Reminder** Gmail *Service* - 29 **Create Follow-up Task** Http Request *Service* - 30 **Check Approval Status** If *Logic* - 31 **Update CRM** Http Request *Service* - 32 **Notify Rejection** Gmail *Service* - 33 **Update Invoice Status** Data Table *Service* ## How it's built - **Starts on:** Someone submitting a form - **Steps:** 33, with 2 branches, 1 loop or waits - **Size:** Large: read it before trusting it with anything live - **Connects to:** Gmail, n8n data table - **Model:** OpenAI ## Questions What does it need to run? An n8n account, plus your own Gmail account, and a key for OpenAI. You connect your own accounts after importing it; none are included. What starts it? It starts on someone submitting a form. Does it use AI? Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n. How long does it take to set up? Take your time. At 33 steps it is large: read it before trusting it with anything live. How do I import it? Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts. **Before you run it** Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 33 steps before you point it at anything that matters. ## Run it in n8n - **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n) - **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fgpt-4-1-mini-proposal-to-payment-lifecycle-management) - **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts. Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind. ## Connects to Each opens the other workflows that use it. [Gmail](https://millionrounds.com/workflows?service=Gmail#library)[n8n data table](https://millionrounds.com/workflows?service=n8n+data+table#library) ## Workflows like it Also money admin, with the same services where possible, closest in size first. - [**Automate SaaS operations with OpenAI** 33 steps · calls a model · Gmail, n8n data table](https://millionrounds.com/workflow/automate-saas-operations-with-openai) - [**Invoice verification and validation with Gmail and Drive** 34 steps · calls a model · Gmail, Google Drive](https://millionrounds.com/workflow/invoice-verification-and-validation-with-gmail-and-drive) - [**Credit card payment reminder & tracking-for Taiwan banks** 31 steps · Gmail, Google Calendar](https://millionrounds.com/workflow/credit-card-payment-reminder-and-tracking-for-taiwan-banks) - [**Generate leads and proposals [FREE SYSTEM] with Gmail** 30 steps · Gmail, Google Drive](https://millionrounds.com/workflow/generate-leads-and-proposals-free-system-with-gmail) - [**Kick off client projects after Stripe payment** 28 steps · ClickUp, Gmail](https://millionrounds.com/workflow/kick-off-client-projects-after-stripe-payment) - [**Automate invoice creation & smart reminders with Jotform** 27 steps · calls a model · Outlook, n8n data table](https://millionrounds.com/workflow/automate-invoice-creation-and-smart-reminders-with-jotform)