Interestididdigar Interestididdigar Interestididdiga

Lokacin da ka ranci kuɗi daga banki, zaka biya riba. Riba da gaske kuɗi ne da ake caji don aron kuɗin, kashi ɗaya ne wanda aka ɗora kan adadin ƙa'idar na tsawon shekara guda - galibi.

\( S = P \left(1 + \dfrac{j}{m}\right)^{mt} \ \ \) ina:

\( S \)	yana da daraja bayan \( t \) lokaci
\( P \)	shine babban adadi (farkon saka jari)
\( t \)	shine adadin shekarun da aka rancen kudin
\( j \)	shi ne riba mai fa'ida na shekara-shekara (ba wai nuna canjin yanayi ba)
\( m \)	shine adadin lokutan da sha'awar ta ninka a kowace shekara