You'll find your account balance in:
My Account (browser): Go to Billing > View all bills and payments
Origin app: in the Billing section
You'll only be able to see your account balance when:
you have no bills due
you have a fixed payment plan
you have positive credit
Similar to a bank balance, your account balance reflects what’s owed and what’s been paid. This includes bills and charges, minus any payments you’ve made or credits you’ve received.
If you've just paid, sit tight – it can take up to three business days for your balance to update in your account.