Spanish to English Bus/Financial Finance (general) Funeral Expenses

From a Mexican financial document, from a funeral home, person has bought a plot and has to sign this document to agree to the monthly payments.
The full sentence is:
En el entendido de que la falta de pago puntual de cualquiera de ellos dara por vencido anticipadamente el adeudo total, volviendose este pagaré a la vista que causara un interes moratorio a razon del ___%
Target is U.S.
Thank You!