RPC error InsufficientFundsForRent: Insufficient funds for rent

Last updated: November 1, 2026

At a glance

Cause

Accounts must either hold at least the rent-exempt minimum for their size, or hold nothing. A transfer that leaves a wallet with a few lamports, a new account funded below its minimum, or a transfer of almost all of a balance all break this rule. It looks like an arithmetic problem and is one: the fee, the transfer and the minimum all have to fit into the same balance.

Solution

1. Read the account index in the error and map it through the transaction's account list.
2. Call getMinimumBalanceForRentExemption with the account's data size. Use 0 for a plain wallet.
3. To empty a wallet, send everything minus the fee so it ends at exactly zero, or leave at least the minimum.
4. For a new account, include the minimum in createAccount.

Example

{
  "err": {
    "InsufficientFundsForRent": {
      "account_index": 1
    }
  }
}