Fees: Don't forget that we need to survive! Patreon takes 5% in addition to payment processing fees. Depending on how you payout your account balance, there will be a fee assessed on your payout. You can see a breakdown of these fees for each of your payouts from your financial dashboard.
Declined pledges: Another cause is if some of your patrons' payments declined. You can access your Patron Manager via the drop-down and click into any paid post to see if any patron payments were declined.
Pledges to other creators: If you're a patron to other creators, we'll subtract your pledge from your creator payout. This prevents unnecessary additional fees, and your card or PayPal account will be billed less/not at all.