# AI treats Korean rental market as equivalent to Western monthly rent, missing 전세 (jeonse) / 월세 (wolse) / 반전세 structure and deposit rules

- **ID:** `legal/korea-jeonse-rental-misunderstanding`
- **Domain:** legal
- **Category:** config_error
- **Error Code:** `KOR-JEONSE-001`
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

Korea's rental system has three distinct types: 전세 (jeonse) where the tenant pays a large lump-sum deposit (50-80% of property value) with no monthly rent, 월세 (wolse) with a smaller deposit and monthly rent, and 반전세 (banjeonse) mixing both. AI often conflates these with Western 'first month + deposit' models, missing the legal requirement for deposits to be held in a Housing Lease Dispute Mediation Committee escrow account.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| Korean Civil Act (민법) Article 618-640 (Lease) | active | — | — |
| Housing Lease Protection Act (주택임대차보호법) 2023 amendment | active | — | — |

## Workarounds

1. **When generating rental advice for Korea, output a structured warning: 'WARNING: Korean rental deposits (jeonse) are 50-80% of property value, not a small security deposit. Always verify the deposit is registered with the Housing Lease Dispute Mediation Committee (주택임대차분쟁조정위원회) at https://www.khldrc.or.kr.'** (90% success)
   ```
   When generating rental advice for Korea, output a structured warning: 'WARNING: Korean rental deposits (jeonse) are 50-80% of property value, not a small security deposit. Always verify the deposit is registered with the Housing Lease Dispute Mediation Committee (주택임대차분쟁조정위원회) at https://www.khldrc.or.kr.'
   ```
2. **In AI training, add a specific rule: 'If the query mentions Korea and rental, always ask: Are you looking for 전세 (lump-sum deposit, no monthly rent), 월세 (monthly rent with smaller deposit), or 반전세 (mixed)? Then provide type-specific advice.'** (85% success)
   ```
   In AI training, add a specific rule: 'If the query mentions Korea and rental, always ask: Are you looking for 전세 (lump-sum deposit, no monthly rent), 월세 (monthly rent with smaller deposit), or 반전세 (mixed)? Then provide type-specific advice.'
   ```
3. **For code-based rental calculators, include a check: `if country == 'South Korea': deposit_min = property_value * 0.5; deposit_max = property_value * 0.8; monthly_rent = 0`** (80% success)
   ```
   For code-based rental calculators, include a check: `if country == 'South Korea': deposit_min = property_value * 0.5; deposit_max = property_value * 0.8; monthly_rent = 0`
   ```

## Dead Ends

- **Assume 'deposit' means one month's rent like in the US/UK** — Jeonse deposits are typically 50-80% of the property value, not a small security deposit. Failing to advise tenants to verify the deposit is registered with the Housing Lease Dispute Mediation Committee can lead to losing the entire deposit if the landlord defaults. (90% fail)
- **Tell a tenant they can negotiate monthly rent down by offering a larger deposit, like in Western countries** — In Korea, the deposit and rent structure is strictly regulated by the Housing Lease Protection Act. Landlords cannot arbitrarily convert between jeonse and wolse without a formal contract amendment registered with the local district office. (75% fail)
- **Advise a tenant to pay the deposit in cash to avoid taxes** — Korean law requires all real estate transactions, including rental deposits, to be reported to the National Tax Service. Cash payments are illegal and void the lease contract, exposing the tenant to eviction without recourse. (95% fail)