# Borrowing

Borrowers can repay or borrow more PAR/paUSD at any time, within the limits of the MCR. Borrowing alters the total supply of outstanding PAR/paUSD. When one borrows, the Vaults contract mints new PAR/paUSD tokens for them.

![](https://1576197425-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MdnKrtV1Ev2ILZ6C4SC%2F-MeOMiZH-3UYo4Ulq02w%2F-MeOONh2d7zIEPYJ5oQ4%2FVault_%20Open%20and%20Deposit%20\(1\).png?alt=media\&token=6991c73d-9d72-47f5-b393-0939f44deab0)

Borrowers can continue to mint PAR/paUSD as long as they deposit a greater value of collateral in their vault. This guarantees that all outstanding PAR/paUSD are fully backed by sufficient collateral.