Korea Payroll & Tax API › monthly-rent-tax-credit

South Korea monthly rent (wolse) tax credit at year-end settlement

South Korea monthly rent (wolse) tax credit at year-end settlement: 17% or 15% of up to KRW 10 million rent for homeless tenants earning up to KRW 80 million.

Price: $0.01 USDC per call over REST (x402 on Base, no API key). MCP: free as monthly_rent_tax_credit at https://api.kkuldogu.com/mcp. Basis year: 2026.

Input

Field	Type	Required	Description
`grossSalary`	number	yes	Annual gross salary (KRW)
`monthlyRent`	number	yes	Monthly rent excluding maintenance fees (KRW)
`months`	integer		Months paid this year; default 12
`eligibleTenant`	boolean		Homeless householder (or member) with resident registration at the address; default true

Example request

curl -X POST https://api.kkuldogu.com/v1/monthly-rent-tax-credit -H "content-type: application/json" \
  -d '{"grossSalary":40000000,"monthlyRent":600000}'

Without payment this returns 402 with x402 payment requirements; an x402 client pays $0.01 USDC and retries.

Example response

{
  "basisYear": 2026,
  "currency": "KRW",
  "disclaimer": "For reference only, not legal or tax advice. Uses official 2026 Korean rates and the same formulas as the kkuldogu.com calculators; actual payroll, NHIS/NPS notices and tax settlement can differ.",
  "source": "https://kkuldogu.com",
  "tool": "monthly-rent-tax-credit",
  "input": {
    "grossSalary": 40000000,
    "monthlyRent": 600000
  },
  "result": {
    "credit": 1224000,
    "eligible": true,
    "annualRent": 7200000,
    "eligibleRent": 7200000,
    "ratePct": 17
  }
}

For reference only, not legal or tax advice. Uses official 2026 Korean rates and the same formulas as the kkuldogu.com calculators; actual payroll, NHIS/NPS notices and tax settlement can differ. · Calculators for people (Korean): kkuldogu.com · API home · llms.txt · OpenAPI