> ## Documentation Index
> Fetch the complete documentation index at: https://opentrain.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Billing and payment methods

> Set up employer payment methods, fund milestones, approve completed work, and download invoices.

Employers use OpenTrain payments to fund milestones, approve completed work, and download invoice records.

## Add a payment method

Open employer billing settings before your first hire. OpenTrain uses Stripe for secure payment processing. Your payment details are handled by Stripe, not stored directly by OpenTrain.

## Fund work when you hire

The first payment action usually happens in the hire flow. Review the milestone amount, deposit total, and payment method before confirming.

<Frame caption="The hire flow shows the first milestone and payment method before you confirm the deposit.">
  <img src="https://mintcdn.com/opentrainai/BG3fNmpCfsxOjpqV/images/screenshots/employers/hire-fund-modal-desktop.png?fit=max&auto=format&n=BG3fNmpCfsxOjpqV&q=85&s=7663be3c162c4c9f6d7cea6fe534f23a" alt="Employer hire and fund modal showing first milestone details, deposit total, payment method, credit balance, and escrow note." width="526" height="744" data-path="images/screenshots/employers/hire-fund-modal-desktop.png" />
</Frame>

## Manage milestone payments

After hire, the **Contract** tab shows funded, not-funded, and paid milestones.

<Frame caption="The Contract tab keeps milestone payment status tied to the hired AI trainer.">
  <img src="https://mintcdn.com/opentrainai/HyBm-2LMZnEub-L_/images/screenshots/payments/milestones-contract-tab-employer-desktop.png?fit=max&auto=format&n=HyBm-2LMZnEub-L_&q=85&s=40a5863444f5f48176cd3957cf08972c" alt="Employer Contract tab showing paid, active and funded, and not-funded milestone rows." width="1280" height="800" data-path="images/screenshots/payments/milestones-contract-tab-employer-desktop.png" />
</Frame>

Approve completed work only after you have reviewed the deliverable.

## Download invoices

Use **Reports** to view and download employer invoices.

<Frame caption="The Reports page lists employer invoices and download actions.">
  <img src="https://mintcdn.com/opentrainai/HyBm-2LMZnEub-L_/images/screenshots/employers/reports-invoices-desktop.png?fit=max&auto=format&n=HyBm-2LMZnEub-L_&q=85&s=aa922580be7bef274c2d53079c07197c" alt="Employer Reports page showing an invoices table with projects, billing type, payment status, and Download buttons." width="1280" height="800" data-path="images/screenshots/employers/reports-invoices-desktop.png" />
</Frame>

## Payment issues

Contact [support@opentrain.ai](mailto:support@opentrain.ai) if a payment method fails, a charge looks wrong, or you need help with a payment dispute. Do not send card numbers, bank account details, full invoices with private billing data, passwords, or verification codes in messages or email.