谢谢你的建议！不过可惜lease上确实写明要全部交回，是我事先没仔细看。

Lease上写着：“The Resident will also be asked to return any Move-In Concessions in addition to the lease break penalty.”然后下面一行明确注明“Amount of Move-In Concession”是一个月的rent。

我之前的退回prorated move-in bonus的印象，也许是和其他apartment记混了。