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

# Capital surcharge

> The Capital Surcharge measure in FRTBCombinedCube, computing the additional capital charge when SA exceeds IMA for approved desks, per Basel MAR33.45, with Euler, Incremental, and Spot variations

<Badge color="gray" size="lg">[ima](../tags/ima)</Badge>

|                 |                                                                                                                                             |
| --------------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
| **Description** | The capital surcharge                                                                                                                       |
| **Variations**  | [euler](./euler), [incremental](./incremental), [spot](./spot)                                                                              |
| **Reference**   | [\[MAR33.45\]](https://www.bis.org/basel_framework/chapter/MAR/33.htm?inforce=20230101\&published=20200327#paragraph_MAR_33_20230101_33_45) |
| **Formula**     | $\displaystyle Capital\ surcharge=k \cdot max\left \{ 0, SA_{G,A}-IMA_{G,A}\right \}$                                                       |