---
title: "Lease vs Buy a Car Calculator"
method: POST
path: "/api/v1/tools/lease-vs-buy-car-calculator"
tags: ["auto"]
---

# Lease vs Buy a Car Calculator

`POST /api/v1/tools/lease-vs-buy-car-calculator`

## Request

- Base URL: `https://calcfleet.com`
- URL: `https://calcfleet.com/api/v1/tools/lease-vs-buy-car-calculator`
- Auth: none declared

Compare leasing versus buying a car over the same time horizon. See each total cost, the difference, and true net cost per month once resale value is counted.

## Request body

- object
  - `horizonMonths` integer, required
  - `leaseDownPayment` number, required
  - `leaseMonthly` number, required
  - `leaseFees` number, required
  - `buyDownPayment` number, required
  - `buyMonthly` number, required
  - `estimatedMaintenance` number, required
  - `resaleValue` number, required

## Response `200`

Successful calculation result.

- object
  - `result` object, required: Structured calculation output (fields vary per calculator).

## Other responses

- `400`: Invalid input — the issues array contains Zod validation errors.
- `403`: Forbidden — an Authorization: Bearer cf_… key was supplied but is invalid.
- `404`: Unknown tool slug.

---

[API](https://skmtc.dev/calcfleet/apis/calcfleet-financial-calculators-api.md) · [All operations](https://skmtc.dev/calcfleet/apis/calcfleet-financial-calculators-api/llms.txt) · [OpenAPI document](https://skmtc.dev/calcfleet/apis/calcfleet-financial-calculators-api/revisions/cd9abd595bbe?raw)