I remember last time there was a discussion about there being a discrepency between CFAI and schweser notes about how first payment is treated when lease payment is due to be made on the first of the month.

The discussion was that CFAI deducted the first payment from lease liability before calculating the interest for the first year, but as per schweser, first amount is deducted after calculating the interest for that year. I was convinced with argument of some people on the forum that as soon as you sign the lease, you make the first payment and this is the reason why you deduct first payment from the calculation but schweser doesn’t seem to follow this. Could some please let me know what should be done for the first payment when lease payment is due on the first of the month?