When you set up pricing for your memberships you can choose to include a recurring fee item, that must be paid in full "up-front". In this case, the Per Bill Amt will take this into consideration when calculating. NOTE: This option is only available when proration is not enabled. 

1. In Setup > Membership > Types click Pricing for the desired membership.

   

2. For the desired fee item click Billing Options.

   

3. Enable Collect this fee upfront with first payment/it cannot be spread.

   

4. Click Done.