---
title: "갭투자 실투자금 (Korean \"gap\" investment: acquisition tax, brokerage, cash needed)"
method: GET
path: "/api/v1/gap-investment"
---

# 갭투자 실투자금 (Korean "gap" investment: acquisition tax, brokerage, cash needed)

`GET /api/v1/gap-investment`

## Request

- Base URL: `https://kwhmate.com`
- URL: `https://kwhmate.com/api/v1/gap-investment`
- Auth: none declared

Runs the same calculator as https://gyesanmate.com/gap-investment/. Reference: 출처: 지방세법 제13조의2(시행 2026.1.1)·제151조 · 1주택 세율·중개보수는 최신 공지 확인 · 투자 권유 아님. Arrays: comma-separated. Also accepts POST with a JSON body.

## Query parameters

- `price` number, required
- `jeonse` number, required
- `houses` integer: Number of homes after buying
- `adjusted_area` boolean
- `over_85m2` boolean
- `other_costs` number
- `growth_percent` number
- `years` number

## Response `200`

Result with source and page URL

- Result
  - `ok` boolean
  - `calculator` string
  - `title` string
  - `currency` string, nullable
  - `input` object
  - `result` object
  - `estimate` boolean
  - `reference` string: Reference date and official source
  - `page` string, uri
  - `disclaimer` string

## Other responses

- `400`: Invalid input
- `429`: Rate limited (60 requests per minute)

---

[API](https://skmtc.dev/kwhmate/apis/kwhmate-korea-survival-kit-calculators-api.md) · [All operations](https://skmtc.dev/kwhmate/apis/kwhmate-korea-survival-kit-calculators-api/llms.txt) · [OpenAPI document](https://skmtc.dev/kwhmate/apis/kwhmate-korea-survival-kit-calculators-api/revisions/90207915728b?raw)