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

# New Customer Total Transaction Cost: Combined Payment Fees for First-Time Buyers

> Track total transaction costs for new customer orders including gateway fees and user-defined charges. Analyze payment processing impact on first-time buyer unit economics.

<Tip>
  The total cost of processing payments for new customer orders, combining gateway fees and any additional user-defined transaction costs.
</Tip>

## Formula

<Info>
  **New Customer Total Transaction Cost** = [**New Customer Gateway Cost**](/reference/metrics/orders/transaction/new-customer-gateway-cost) + [**New Customer Other Transaction Cost**](/reference/metrics/orders/transaction/new-customer-other-transaction-cost)
</Info>

### Formula Components

| Metric                                                                                                               | Definition                                                               |
| -------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| [**New Customer Gateway Cost**](/reference/metrics/orders/transaction/new-customer-gateway-cost)                     | Payment gateway processing fees for new customer orders                  |
| [**New Customer Other Transaction Cost**](/reference/metrics/orders/transaction/new-customer-other-transaction-cost) | User-defined transaction costs from order cost entries for new customers |

| Metadata        |                             |
| --------------- | --------------------------- |
| **Type**        | Currency                    |
| **Data Source** | [Shopify](/sources/shopify) |
| **Aggregation** | Sum                         |

***

## Example

Your store processed **847 new customer orders** in April with **\$3,124** in total transaction costs:

| Component                     | Amount      | % of NC Revenue |
| ----------------------------- | ----------- | --------------- |
| NC Gateway Cost               | \$2,541     | 3.0%            |
| NC Other Transaction Cost     | \$583       | 0.7%            |
| **NC Total Transaction Cost** | **\$3,124** | **3.7%**        |

Transaction costs for new customers are slightly higher as a percentage of revenue compared to returning customers due to lower average order values.

***

## How It Works

New Customer Total Transaction Cost aggregates all payment-related fees specifically for first-time buyer orders. Gateway costs are pulled from Shopify's transaction data for orders where the customer had no prior purchase history. Other Transaction costs come from user-defined order cost entries with the "Transaction" category. This metric is deducted from NC CM1 to calculate NC CM2.

***

## When to Use

| Scenario                     | Action                                                    |
| ---------------------------- | --------------------------------------------------------- |
| Calculating new customer CAC | Include in true customer acquisition cost analysis        |
| Comparing customer segments  | Benchmark NC vs. RC transaction costs                     |
| Unit economics modeling      | Factor into per-new-customer profitability                |
| Payment method optimization  | Identify if new customers use higher-cost payment methods |

***

## Related Metrics

| Metric                                                                                                           | Relationship                                                |
| ---------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------- |
| [New Customer Gateway Cost](/reference/metrics/orders/transaction/new-customer-gateway-cost)                     | Component: payment processor fees for new customers         |
| [New Customer Other Transaction Cost](/reference/metrics/orders/transaction/new-customer-other-transaction-cost) | Component: user-defined transaction costs for new customers |
| [Total Transaction Cost](/reference/metrics/orders/transaction/total-transaction-cost)                           | All customers' transaction costs combined                   |
| [Returning Customer Transaction Cost](/reference/metrics/orders/transaction/returning-customer-transaction-cost) | Compare to returning customer transaction costs             |

[See all Transaction Cost metrics →](/reference/metrics/orders/transaction)