---
title: "Set a customer's selling price on an item"
description: "On an item whose price bills from the model price list only."
canonical_url: "https://twominutebilling.com/help/developers/api-reference/subscriptions/set-a-customer-s-selling-price-on-an-item"
---
# Set a customer's selling price on an item

> On an item whose price bills from the model price list only.

<api-operation method="PATCH" path="/v1/businesses/{biz}/subscriptions/{sub}/items/{item}">
<template v-slot:docs="">

Sets this customer's markup and per-model rows. They win over the price's rates and markup. A later change to the price does not move them. Send `null` to remove a field. Needs `subscriptions:manage`; the change is audited.

## Path parameters

<table>
<thead>
  <tr>
    <th>
      Parameter
    </th>
    
    <th>
      Type
    </th>
    
    <th>
      Required
    </th>
    
    <th>
      Description
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        biz
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      <strong>
        yes
      </strong>
    </td>
    
    <td>
      The business's id (biz_…).
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        sub
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      <strong>
        yes
      </strong>
    </td>
    
    <td>
      The subscription's id (sub_…).
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        item
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      <strong>
        yes
      </strong>
    </td>
    
    <td>
      The subscription item's id (si_…).
    </td>
  </tr>
</tbody>
</table>

## Headers

<table>
<thead>
  <tr>
    <th>
      Parameter
    </th>
    
    <th>
      Type
    </th>
    
    <th>
      Required
    </th>
    
    <th>
      Description
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        Idempotency-Key
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      Safely retry writes — repeats return the original response. If a write FAILED after it had already taken effect, that failure is what repeats: the key is spent, and a new attempt needs a new key.
    </td>
  </tr>
</tbody>
</table>

## Body

The request body is **required**.

<table>
<thead>
  <tr>
    <th>
      Field
    </th>
    
    <th>
      Type
    </th>
    
    <th>
      Required
    </th>
    
    <th>
      Description
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        markup_percent
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      The selling price's markup percent.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        rates
      </code>
    </td>
    
    <td>
      <code>
        array of object
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      The selling price's rates.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        rates.match
      </code>
    </td>
    
    <td>
      <code>
        object
      </code>
    </td>
    
    <td>
      <strong>
        yes
      </strong>
    </td>
    
    <td>
      Group values over some of the meter's <code>
        group_by
      </code>
      
      . The row naming the most values wins.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        rates.unit_amount_decimal
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      A fixed rate: minor units per the price's <code>
        quantity_divisor
      </code>
      
       units. A decimal string with no exponent, for example <code>
        "20"
      </code>
      
      .
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        rates.markup_percent
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      no
    </td>
    
    <td>
      Or: percent over the price's markup base, at most 6 decimal places.
    </td>
  </tr>
</tbody>
</table>

## Response

<table>
<thead>
  <tr>
    <th>
      Field
    </th>
    
    <th>
      Type
    </th>
    
    <th>
      Description
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        object
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      The object type; always <code>
        subscription_item
      </code>
      
      . One of <code>
        subscription_item
      </code>
      
      .
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        id
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      The subscription item selling price's id.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        subscription
      </code>
    </td>
    
    <td>
      <code>
        string
      </code>
    </td>
    
    <td>
      The subscription's id (sub_…).
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        selling_price
      </code>
    </td>
    
    <td>
      <code>
        object
      </code>
    </td>
    
    <td>
      The subscription item selling price's selling price.
    </td>
  </tr>
</tbody>
</table>

## Status codes

<table>
<thead>
  <tr>
    <th>
      Status
    </th>
    
    <th>
      Meaning
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        200
      </code>
    </td>
    
    <td>
      The item and its selling price.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        400
      </code>
    </td>
    
    <td>
      The price is not on the model price list, or a row is not correct.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        404
      </code>
    </td>
    
    <td>
      No such subscription or item.
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        409
      </code>
    </td>
    
    <td>
      Idempotency-Key conflict — the key is already in flight, or was reused with a different request payload.
    </td>
  </tr>
</tbody>
</table>
</template>

<template v-slot:request="">

```bash [Request]
curl -X PATCH "$TMBILLING_URL/v1/businesses/biz_XXXXXXXXXXXX01/subscriptions/sub_XXXXXXXXXXXX01/items/si_XXXXXXXXXXXX01" \
  -H "Authorization: Bearer $TMBILLING_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{
    "markup_percent": "Markup percent"
  }'
```

</template>

<template v-slot:response="">
<code-group>

```json [200 OK]
{
  "object": "subscription_item",
  "id": "pro-monthly-usd",
  "subscription": "sub_XXXXXXXXXXXX01",
  "selling_price": {
    "markup_percent": "Markup percent",
    "rates": [
      {
        "match": {
          "model": "large-v2",
          "token_type": "input"
        }
      }
    ]
  }
}
```

```json [400 Bad Request]
{
  "error": {
    "type": "invalid_request_error",
    "message": "The price is not on the model price list, or a row is not correct."
  }
}
```

```json [404 Not Found]
{
  "error": {
    "type": "invalid_request_error",
    "message": "No such subscription or item."
  }
}
```

```json [409 Conflict]
{
  "error": {
    "type": "idempotency_error",
    "message": "Idempotency-Key conflict — the key is already in flight, or was reused with a different request payload."
  }
}
```

</code-group>
</template>
</api-operation>


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