---
title: "LLC vs Sole Proprietor Calculator"
method: POST
path: "/api/v1/tools/llc-vs-sole-proprietor-calculator"
tags: ["business"]
---

# LLC vs Sole Proprietor Calculator

`POST /api/v1/tools/llc-vs-sole-proprietor-calculator`

## Request

- Base URL: `https://calcfleet.com`
- URL: `https://calcfleet.com/api/v1/tools/llc-vs-sole-proprietor-calculator`
- Auth: none declared

Compare a sole proprietorship with an LLC: formation and annual state costs, self-employment tax on both, and the estimated savings of an S-corp election.

## Request body

- object
  - `netProfit` number, required
  - `stateFilingFee` number, required
  - `annualStateFee` number, required
  - `registeredAgentFee` number, required
  - `sCorpElection` boolean, required
  - `reasonableSalary` number, required
  - `payrollAdminCost` 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)