Early Pay to Sub

Would like to pay a sub invoice early BEFORE the period is marked as ready to pay. There are many cases where a sub needs funding to do more work or other reasons as a GC we use funding as a way to motivate. Another case is the funding is delayed from the owner but we need to fund a sub anyway for many different reasons. So a way to go in and pay an approved invoice in a period NOT marked as ready to pay would be very useful. Having to work this out of the system is time consuming and fraught with the potential for errors.