Total foreign investment calculation rules redefine ownership and control consequences, triggering approval requirements in capped sectors. Guidelines define total foreign investment by aggregating direct and indirect foreign investment across multilayered Indian company structures, specify ownership (>50% beneficial ownership) and control (majority director appointment) thresholds, treat direct investment as non-resident investment and indirect investment as the foreign-held interest of investing Indian companies (with a 100% subsidiary exception), require government approval in capped sectors for establishment or transfer of ownership/control to non-residents, and impose downstream investment compliance, notification and auditor certification obligations.