> ## 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.

# TikTok Cost per Subscribe: Subscription Campaign Efficiency

> Track the cost per subscribe event from your TikTok ads. Measure subscription campaign efficiency and optimize your audience targeting for lower acquisition costs.

<Tip>
  TikTok Cost per Subscribe measures the average spend required to generate one subscribe event from your TikTok ads.
</Tip>

## Formula

<Info>
  **TikTok Cost per Subscribe** = **TikTok Ad Spend** ÷ **TikTok Subscribes**
</Info>

### Formula Components

| Metric                                                                                              | Definition                                          |
| --------------------------------------------------------------------------------------------------- | --------------------------------------------------- |
| [**TikTok Ad Spend**](/reference/metrics/advertising/tiktok/tiktok-spend/tiktok-spend)              | Total amount spent on TikTok advertising            |
| [**TikTok Subscribes**](/reference/metrics/advertising/tiktok/tiktok-conversions/tiktok-subscribes) | Number of subscribe events attributed to TikTok ads |

| Metadata        |                               |
| --------------- | ----------------------------- |
| **Type**        | Currency                      |
| **Data Source** | [TikTok Ads](/sources/tiktok) |
| **Aggregation** | Ratio                         |

***

## Example

A subscription box company spent **\$6,000** on TikTok ads in April and generated **240 new subscribers**.

| Month    | Ad Spend | Subscribes | Cost per Subscribe |
| -------- | -------- | ---------- | ------------------ |
| February | \$4,200  | 140        | \$30.00            |
| March    | \$5,000  | 180        | \$27.78            |
| April    | \$6,000  | 240        | \$25.00            |

April's cost per subscribe of **\$25.00** shows a 10% improvement from refined audience targeting.

***

## How It Works

TikTok tracks subscribe events when users complete subscription sign-ups attributed to your ads. This metric divides total ad spend by subscribe events to show your average acquisition cost per subscriber.

***

## When to Use

| Scenario              | Action                                                                 |
| --------------------- | ---------------------------------------------------------------------- |
| Evaluating campaigns  | Compare cost per subscribe across campaigns to identify top performers |
| Budget planning       | Calculate required spend for subscriber acquisition goals              |
| Creative testing      | A/B test ad creatives and measure impact on subscription cost          |
| Audience optimization | Refine targeting to lower cost per subscribe                           |

***

## Related Metrics

| Metric                                                                                          | Relationship                                          |
| ----------------------------------------------------------------------------------------------- | ----------------------------------------------------- |
| [TikTok Subscribes](/reference/metrics/advertising/tiktok/tiktok-conversions/tiktok-subscribes) | Denominator—total subscribes driving this calculation |
| [TikTok CPA](/reference/metrics/advertising/tiktok/tiktok-efficiency/tiktok-cpa)                | Similar efficiency metric for purchase conversions    |

[See all TikTok Conversions metrics →](/reference/metrics/advertising/tiktok/tiktok-conversions)