io.github.yuli3/oiyo-calculations · v1.3.0 · finance-and-payments
OIYO Korea Calculators is healthy: it completed an MCP handshake in 1523 ms and exposes 26 tools.
Korean personal tax, payroll, labor, real estate and calendar calculators. Code, no LLM.
Endpoint: https://api.oiyo.net/mcp (streamable-http)
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| Users (last 30 days) | 0 |
| Handshake | Healthy |
| Auth needed | None |
| Tool count | 26 |
| Latency | 1523 ms |
| Last checked (UTC) | 2026-11-09T16:35:34.658Z |
| Checked (UTC) | Status | Latency | Error |
|---|---|---|---|
| 2026-11-09T16:35:34.658Z | Healthy | 1523 |
get_kr_minimum_wage | Verified Korean minimum wage by year, effective dates and 8/209-hour examples. Not a 2027 net-salary calculator; uncollected insurance is unavailable. |
get_kr_holidays | Get official South Korea public holidays, substitute holidays, and solar terms for a given year. |
check_kr_business_day | Determines if a given date is a South Korea working business day or a public holiday/weekend. |
calculate_saju_astrology | Computes traditional Korean Sexagenary Cycle (60 Gapja) Four Pillars and Five Elements (오행) balance from birth datetime and solar/lunar calendar. |
calculate_unemployment_benefits | Simulates statutory South Korean unemployment benefits (실업급여) duration, daily benefit rate, and total expected payout. |
calculate_weekly_allowance | Calculates statutory South Korean weekly holiday allowance (주휴수당) for part-time and hourly workers. |
calculate_overtime_pay | Calculates statutory overtime, night, and holiday allowances under Korean Labor Standards Act. |
calculate_net_salary | Calculates net monthly take-home salary after the 4 major social insurances (2026 statutory rates) and an ESTIMATED income tax (annualized estimate, not the NTS withholding table) in South Korea. |
calculate_severance_pay | South Korean statutory severance arithmetic. Unknown or mixed four-week hours return null eligibility and amount; all-period self-confirmation is required for an estimate. |
calculate_annual_leave | Calculates statutory annual paid leave days (연차 휴가) and unused leave cash-out allowance by years of service. |
calculate_military_service | Calculates South Korea mandatory military service duration, completion rate, remaining days, and rank promotion dates. |
calculate_gas_bill | Calculates South Korea residential city gas invoice amount based on cubic meters used and heating/cooking tariff. |
convert_units | Universal deterministic unit conversion for area (pyeong ↔ m², sqft, ha), length, mass, and temperature. |
calculate_cagr | Calculates Compound Annual Growth Rate (CAGR, 연평균 복합 성장률), total ROI, and Rule of 72 milestone. |
calculate_compound_interest | Simulates compound interest growth with initial principal, annual yield, recurring monthly contributions, and annual balance trajectory. |
calculate_health_insurance | Calculates Korean regional insurance premiums and preliminary income/property flags only. dependentEligibility.isEligible is null: family support, spouse/sibling conditions, housing rental income and statutory exceptions require NHIS review. |
diagnose_hug_guarantee | Diagnoses HUG Jeonse Deposit Return Guarantee eligibility (126% rule, 60% senior debt limit, 90% debt ratio limit) and calculates statutory guarantee fee. |
calculate_capital_gains_tax | Calculates South Korea Real Estate Capital Gains Tax with 1-home 1.2 billion KRW exemption, high-value house apportionment, and up to 80% special long-term holding deduction. |
compare_vat_tax | Compares South Korea Value-Added Tax (VAT) between General Taxpayer (10% with full deduction/refund) and Simplified Taxpayer (15-40% value-added rate, 48M exemption, no refund). |
calculate_inheritance_gift_tax | Calculates South Korea 2026 statutory inheritance and gift tax, progressive tax brackets (10-50%), relationship deductions, and voluntary filing discount. |
calculate_loan_refinance | Calculates loan refinancing savings, prepayment penalty fees with 3-year sliding taper, and break-even point in months. |
calculate_card_tax_deduction | Calculates South Korea 2026 year-end card tax deduction, 25% threshold, credit (15%) vs check (30%) rates, and golden ratio strategy. |
calculate_kr_year_end_settlement | South Korea 2026 귀속 year-end tax settlement (연말정산) for a resident wage earner: income deductions, card deduction, special deductions/credits vs the 130,000 KRW standard credit (picks the lower tax), refund or extra payment when withheld tax is given. Same formulas as tools.oiyo.net. Refuses unknown |
calculate_kr_freelancer_income_tax | South Korea freelancer (3.3% withholding, 사업소득) May comprehensive income tax estimate: simple expense rate 940909 (64.1%, 49.7% above 40M KRW) or a given expense ratio, compared with the tax already withheld to show refund or extra payment. Same formulas as tools.oiyo.net. Tax years 2025 and 2026 on |
calculate_kr_acquisition_tax | South Korea 2026 housing acquisition tax (주택 취득세) with local education tax and rural special tax: 1-3% standard rate (6-900M KRW sliding formula) or 8%/12% multi-home surcharge. Same formulas as tools.oiyo.net. Returns statute basis; does not judge house counts or first-home relief. |
calculate_kr_property_tax | South Korea 2026 housing property tax (주택 재산세) from the official price: fair market value ratio (43-45% for one-home households, 60% otherwise), one-home special rate up to 900M KRW, urban area tax and local education tax. Same formulas as tools.oiyo.net. Excludes comprehensive real estate holding t |