# Bundled Post-fund

Post-funding only works on certain chains that: 1) do not have a "base fee" and 2) have builders / bundle functionality. Currently we only support this method on BSC.

Instead of paying the fee payer (like in [Pre-fund](/blink/get-started/blink-gas-sponsorship/types-of-gss/pre-fund.md)) we simply pay the builder/validator an extra tip to include the sponsoring transaction.

Advantages:

* Simple - "Just works with all types of wallets"
* More gas efficient then [Pre-fund](/blink/get-started/blink-gas-sponsorship/types-of-gss/pre-fund.md)

Disadvantages

* Network support (only BSC)


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