Can August track rent across more than one bank account?

Yes. August connects to your UK current accounts through Plaid, an FCA-regulated Open Banking provider. The connection is read-only, approved in your own banking app, and August never holds credentials or moves money. Portfolio supports 6 bank accounts and Portfolio+ supports 20, so rent can land wherever it lands and still be matched to the right tenancy. A missing payment in any account shows up straight away, not at the end of the month when you reconcile statements by hand.