How to Model Commitment for Subsequent Period (Budget)

TLDR: how to ensure budget/actuals represent funds that won't be allocated until later period

We have bills (e.g., large software licenses) that are due towards the end of our Fiscal Year. These items could be represented by Purchasing Contracts or something similar.

Those amounts aren't currently loaded as budgets, and don't appear as actuals in the GL. So it appears during the year we have more money to spend than we really do.

What's the appropriate way to represent this with delivered PeopleSoft? Is there a way to accrue the cost of the bill across all periods of the year, then adjust as necessary as we go?