Have you created a payment plan for a student's invoice and the final payment is larger than the rest of the installments?

 

This happens when your total amount isn't equally divisible by the amount of repayments selected e.g. 
$1900 divided by 6 = $316.6666666666667 -  it won't round up or down and will instead use the final payment to make up the remainder of the outstanding balance

 

 

However when we have an amount that is equally divisible by the amount of installments then all the repayment amounts will be equal
In this case $1200 divided by 6 = $200 so all the payment amounts are equal