wesreid / lease-calculator

A simple auto lease calculator

Car Lease Calculator 🚗

A simple auto lease calculator for calculating your monthly lease payment, APR, total lease cost, percentage off MSRP, etc.

See it used in the Auto Lease app: https://github.com/ErezNagar/lease-calculator-app

Features

• Calculates car lease payments including total monthly payment, monthly payment pre-tax, total lease cost, APR, percentage off MSRP and drive-off fees.
• Supports methods of taxation by state
• Includes acquisition fee for supported manufacturers
• Includes disposition fee for supported manufacturers
• Supports zero down payment
• Supports zero drive-off payments

How To Use

npm install lease-calculator

const leaseCalculator = new LeaseCalculator();
leaseCalculator.calculate({
  make: "Toyota",
  msrp: 23000,
  sellingPrice: 21000,
  rv: 13110,
  isRVPercent: false,
  mf: 0.00125,
  salesTax: 6.25,
  totalFees: 1200,
});

// Get the lease monthly payment
const monthlyPayment = leaseCalculator.getMonthlyPayment();

API

calculate(leaseValues: Object): void

Main function to calculate lease payments. Must be run prior to any other function in order to first calculate the lease numbers.

Arguments: leaseValues Object, with the following attributes:

• make: string = "" Make of the vehicle, for calculating manufacturer-based fees.

• msrp: number Required, MSRP of the vehicle

• sellingPrice: number Required, negotiated price of the vehicle

• rv: number Required, residual value of the vehicle. If isRVPercent is true, value must be a percentage, e.g., if RV is 65%, rv should be 65.

• isRVPercent: boolean = true Whether the RV is an absolute value or a percentage of MSRP

• mf: number Required, the money factor of the lease (e.g. 0.00125)

• leaseTerm: number = 36 The length of the lease in months

• salesTax: number = 0 The state's sales tax in percentage

• totalFees: number = 0 Total fees of the lease

• rebates: number = 0 Total discount from dealer and manufacturer

• downPayment: number = 0 Down payment, if applicable

• taxMethod: TaxationMethod = TaxationMethod.TAX_ON_MONTHLY_PAYMENT Method of taxation to apply, based on state

• isZeroDriveoff: boolean = false Added in v1.3.0. Whether the lease should be calculated with zero drive-off amount. If true, all fees and taxes are rolled into the monthly payment.

getMonthlyPayment(): number

Gets the monthly payment of the lease, including taxes

getMonthlyPaymentPreTax(): number

Gets the monthly payment of the lease, not including taxes

getTotalLeaseCost(): number

Gets the total cost of the lease. This includes all monthly payments, down payment, disposition fee, acquisition fee, dealer fees and lease taxes.

getDriveOffPayment(): number

Gets total drive-off payment

getDiscountOffMsrpPercentage(): number

Gets the discount off of MSRP, in percentage

getMonthlyPaymentToMsrpPercentage(): number

Gets the percentage of the monthly payment out of the MSRP

getAPR()

Gets the APR value of the lease

getAcquisitionFee(): number

Gets the acquisition fee value by brand. If no brand sepcified, returns 0

getDispositionFee(): number

Gets the disposition fee value by brand. If no brand sepcified, returns 0

getRVValue(): number

Gets the residual value of the lease

getRVPercentage(): number

Gets the residual value of the lease in percentage

getDepreciation(): number

Gets the total depreciation value of the lease. Added in v2.1.0.

getBaseMonthlyPayment(): number

Gets the base monthly payment. Added in v2.1.0.

getRentCharge(): number

Gets the rent charge value. Added in v2.1.0.

getTotalInterest(): number

Gets total interest for the lease. Added in v2.1.0.

getMonthlyTax(): number

Gets the monthly tax value. Applicable on for taxatino method is TAX_ON_MONTHLY_PAYMENT. Otherwise, returns 0. Added in v2.1.0.

getTotalTax(): number

Gets the total tax for the lease. Added in v2.1.0.

Supported manufacturers

Lease Calculator supports acquisition and disposition fee calculation for the following brands:

Acura, Alfa Romeo, Audi, Bmw, Buick, Cadillac, Chevrolet, Chrysler, Dodge, Fiat, Ford, Genesis, GMC, Honda, Hyundai, Infiniti, Jaguar, Jeep, Kia, land rover, Lexus, Lincoln, Mini, Mazda, Mercedes benz, Mitsubishi, Nissan, Ram, Scion, Smart, Subaru, Tesla, Toyota, Volkswagen, Volvo