Production value and actual payment rarely happen in the same month. With payment terms, you shift when the amounts hit liquidity by a whole number of months.
The setting works in months, not days. The payment terms in the contract must therefore be converted: 30 days corresponds to roughly a 1-month shift, 60 days roughly 2 months. For 45 days, choose 1 or 2 months, depending on which gives the most accurate picture for the project.
How to set it up
Open Settings for the project in the Liquidity module.
Under Payment terms, enter the number of months to shift per plan type: Billing Schedule Client, Purchasing (Payment Plans) and Setup and Operation.
The amounts are shifted accordingly, so the picture shows when the money actually moves.
This is what the setting looks like:
In the same place, you will find the toggle for automatically moving delayed invoices. Read more in When an invoice fails to arrive: automatic moving.