A vendor offers you an early payment discount. You will get a 2% discount if you pay the balance within 10 days.

Otherwise, the full balance is due in 30 days. What is the effective interest rate earned on this discount?

This is stated as 2/10 net 30

Discount % | |

100 - Discount % |

x |

360 |

Balance Due Days - Discount Period Days |

2% | |

100 - 2% |

x |

360 |

30 - 10 |

2% | |

98% |

x |

360 |

20% |

Effective rate of interest = 0.306 x 18

Effective rate of interest =