# Formula for Determining Processing Fee

#### MrFixitBeaches

I'm trying to find a formula to automatically calculate the correct Venmo fee (1.9% + $.10) to apply to my invoices each time a client is billed. The fee I'm charging needs to match the amount I will be paying to Venmo at a later time to process the grand total of the invoice. Invoice charges + fee = grand total Grand total - fee = invoice charges #### MrFixitBeaches ##### New member I may have found it in another discussion. (Subtotal/.981)+.1 rounded may be the total I charge for the service and the fee later added by Venmo when cashing out. #### khansaheb ##### Full Member I'm trying to find a formula to automatically calculate the correct Venmo fee (1.9% +$.10) to apply to my invoices each time a client is billed. The fee I'm charging needs to match the amount I will be paying to Venmo at a later time to process the grand total of the invoice.

Invoice charges + fee = grand total

Grand total - fee = invoice charges
Is Venmo fee based on

the 1.9% of the grandtotal, or,​
the 1.9% of the invoice charges, or,​