## Overview

The Billing page in your dashboard lets you view balance, purchase prepaid balance, and review transaction history.

## Balance Overview

Your dashboard displays your wallet balance:

- **Bonus Balance** — Granted from referrals and promotions, expires 30 days after being granted, spendable on Economy or Standard tier (never Premium)
- **Prepaid Balance** — Purchased balance that expires 12 months after purchase, spendable on Economy, Standard, or Premium tier

Every request is billed pay-as-you-go from your wallet — but the rate depends on both the tier **and** which wallet pays. On prepaid: Economy defaults to 0.2x, Standard defaults to 0.5x, Premium is always 1.0x. On bonus: Economy is 1.0x (no discount), Standard is 1.5x (a markup), and Premium isn't payable from bonus at all. A single Economy or Standard request can even draw from both wallets at once, at each wallet's own rate — see [Provider Tiers](/docs/models/provider-tiers) for how that blended charge works.

## Purchasing Prepaid Balance

1. Navigate to **Dashboard → Billing**
2. Choose a deposit amount:
   - $10, $25, $50, $100, $250, or $500
3. Complete payment
4. Balance is added to your prepaid balance immediately

<Tip>
  Prepaid balance expires 12 months after purchase and can pay for Economy,
  Standard, or Premium tier requests. Bonus balance (from referrals/promos)
  expires in 30 days and can pay for Economy or Standard tier requests, never
  Premium. Every request already gets its tier and wallet's rate applied
  automatically — on prepaid, Economy defaults to 0.2x (80% off) and Standard
  defaults to 0.5x (50% off); on bonus, Economy is 1.0x and Standard is 1.5x
  (a markup); Premium is always 1.0x, prepaid only.
</Tip>

## Transaction History

View a complete log of all billing events:

- **Balance deposits** — Prepaid balance purchases
- **Balance usage** — Per-request token consumption

## Payment Methods

ModelStack accepts credit and debit cards for balance deposits.