In financeTo provide or obtain funds for a business, commercial projec..., principalIn finance, principal (the principal, or the principal sum/a... (the principalIn finance, principal (the principal, or the principal sum/a..., or the principalIn finance, principal (the principal, or the principal sum/a... sum/amount) refers to an amount of money loaned or borrowed. The term is used particularly when differentiating or clarifying an amount of money (loaned/borrowed/invested) excluding interest payments. Separately, more generally, in business the term ‘the principal’ refers to the owner of a business or brandA unique identifying symbol, trademark, company name, etc., ..., as distinct from an agent or representative, such as a franchisee.