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

# XP Formula

> Total XP equals total CRS spent, capped at 1B for the level system.

XP is the central progression metric. It feeds the [user level curve](/tokenomics/user-levels) and the [USBI entitlement formula](/tokenomics/usbi-formula).

## Core formula

```
total_xp = total_crs_spent
```

Every Crystal (CRS) you spend in the Bini App produces exactly **one XP**. There is no multiplier, no loss, no exception.

## Cap

```
max_xp = 1,000,000,000  (capped at Level 30)
```

Once you have spent 1B CRS, you are at Level 30 (Genesis) and your XP no longer counts for level progression. The cap exists so the level system has a clear endpoint and the maximum USBI entitlement is defined.

## What counts as CRS spend

Every action that consumes CRS gives XP:

| Action                          | Gives XP                                  |
| ------------------------------- | ----------------------------------------- |
| Lesson upgrade                  | Yes                                       |
| USBI bridge (Bridge A)          | Yes — 10,000 CRS spent = 10,000 XP earned |
| Skins                           | Yes                                       |
| Lottery ticket (CRS-priced)     | Yes                                       |
| Agent Token spawn (CRS portion) | Yes                                       |
| Token boost / promotion         | Yes                                       |
| Other CRS sinks                 | Yes                                       |

Earning CRS (mining, claims, daily calendar, referrals) does **not** earn XP. Only spending does.

## Why "spend" not "earn"

The model rewards **engagement and risk-taking**, not passive accumulation. Hoarding CRS doesn't level you up. You must commit your CRS to a sink for XP to flow.

This also means there's no incentive to farm-and-hold — the optimal strategy is consistent spending into productive sinks (lessons first, bridges and other sinks later).

## Formula in code

For implementers:

```javascript theme={null}
function totalXp(totalCrsSpent) {
  return Math.min(totalCrsSpent, 1_000_000_000);
}
```

## Related

<CardGroup cols={2}>
  <Card title="USBI Formula" icon="function" href="/tokenomics/usbi-formula">
    XP → USBI entitlement
  </Card>

  <Card title="User Levels" icon="ranking-star" href="/tokenomics/user-levels">
    XP thresholds for each of the 30 levels
  </Card>

  <Card title="Lessons" icon="graduation-cap" href="/tokenomics/lessons">
    Lesson costs (largest XP source for new users)
  </Card>

  <Card title="Bini App: Claim" icon="mobile" href="/bini-app/overview">
    Where users earn the CRS they later spend
  </Card>
</CardGroup>