[Home](./index.md) > [bitburner](./bitburner.md) > [Bladeburner](./bitburner.bladeburner.md) > [getSkillUpgradeCost](./bitburner.bladeburner.getskillupgradecost.md)
## Bladeburner.getSkillUpgradeCost() method
You have to be employed in the Bladeburner division and be in BitNode-7 or have Source-File 7 in order to use this function.
This function returns the number of skill points needed to upgrade the specified skill.
The function returns -1 if an invalid skill name is passed in.
Signature:
```typescript
getSkillUpgradeCost(name: BladeburnerSkills): number;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| name | [BladeburnerSkills](./bitburner.bladeburnerskills.md) | |
Returns:
number
Number of skill points needed to upgrade the specified skill.
## Remarks
4 GB