I guess it depends on when you start the 1st lease on the scheme and when your due to get the payment as most are paid every 28 days and the payment dates differ for many so it can vary alot.
Plus do mb work it all out monthly but you get 13 payments so they get 13 payments a year as opposed to 12 monthly ones. Is you next payment due on the 7.9.22 tina.
If it is then i’d imagine it would be a part payment/ but maybe around 3/4 of the allowance, if your joining the scheme the 16th.
I recently left the scheme and my 1st payment was £40 less than the full amount as it was less than a week before my payment was due that i gave back the car.
My 1st car on the scheme was over 11 years ago so cannot remember or look at the info.
Great news your getting it on Tuesday, hope all goes well and you enjoy the rest of the summer with the kids and can get out with them.