# Rate Limits & Billing

The API uses pay-as-you-go billing. You're charged per request.

## Pricing

### Feature Pricing

| Feature | Description | Price | Unit |
| --- | --- | --- | --- |
| Fast Tax Research | Fast Tax Research - Designed for Everyday Tax Research at an Affordable Price | $0.24 | per request |
| Deep Tax Research | Deep Tax Research - Designed for In-Depth Tax Research on Complex Issues | $1.50 | per request |
| Audit Research | Audit Research - Designed for In-Depth Audit Research on Complex Issues | $0.65 | per request |

## How It Works

1. Add funds to your account in the platform
2. Each request deducts the cost from your balance
3. Monitor usage in real-time on the dashboard

## Insufficient Balance

If your balance is too low, you'll get a 402 error:

```json
{
  "error": {
    "type": "insufficient_balance",
    "message": "Please add credits to your account",
    "details": {
      "balance_before_cents": 5,
      "cost_cents": 10
    }
  }
}
```

**Solution:** Go to **Balance** section and add funds.

## Auto-Recharge

Never run out of balance:

1. Go to **Balance** section
2. Enable **Auto-Recharge**
3. Set threshold (e.g., $10) and reload amount (e.g., $50)

When your balance drops below the threshold, we'll automatically charge your payment method.

## Rate Limits

If you have a subscription plan, you may have monthly usage limits. When exceeded, you'll get a 429 error:

```json
{
  "error": {
    "type": "rate_limit_exceeded",
    "message": "Monthly usage limit reached",
    "details": {
      "reset_at": "2025-11-01T00:00:00Z"
    }
  }
}
```

## Monitoring Usage

View your usage in the platform:

- Current balance
- Request history
- Cost breakdown
- Usage charts