Korea Jeonse and Monthly Rent Conversion Calculator
Convert a deposit to monthly rent, or the reverse, and see if it is over the legal cap.
The legal cap on the conversion rate is {cap}% a year right now. It is the lower of the Bank of Korea base rate ({base}%) plus {add}%, and {fixed}%. The formula is shown under every result.
Calculate
Enter only the part of the deposit you turn into rent, not the whole deposit. For 50 million won out of 100 million, enter 5,000.
Leave it blank to use the legal cap of 5.00% a year. Enter the rate in your contract if you have one.
Your numbers are calculated on this device and never sent to a server.
What this tells you and what it does not
These are numbers from the formula in the law. This is not legal advice, and it does not judge whether a specific contract is lawful. Get a confirmed date on the lease and check with a professional if needed.
What this does not cover
- Only the Housing Lease Protection Act. Other leases, such as shops, are not calculated.
- It does not decide which contracts the cap applies to. The article covers turning a deposit into monthly rent.
- Local ordinances and other terms in your contract are not included.
- Rent to deposit is the same formula run backwards. It is not checked against the cap.
Rates used here
Each value has a source and a check date. Values I could not verify in the original text are left out.
| Value | Rate | Source |
|---|---|---|
| Rate set by the enforcement decree (10% a year) | 10.00% a year | 주택임대차보호법 시행령 제9조 제1항 |
| Rate added to the base rate | 2.00% a year | 주택임대차보호법 시행령 제9조 제2항 |
| Bank of Korea base rate (decided {decided}) | 3.00% a year | 한국은행 통화정책방향 |
| Legal cap (the lower of the two) | 5.00% a year | 주택임대차보호법 제7조의2 |
Checked on 2026-10-06
Legal text behind this
The text below is copied as received from the National Law Information Center and the Bank of Korea website. It is in Korean.
| Provision | Role |
|---|---|
주택임대차보호법 제7조의2 Show original text보증금의 전부 또는 일부를 월 단위의 차임으로 전환하는 경우에는 그 전환되는 금액에 다음 각 호 중 낮은 비율을 곱한 월차임(月借賃)의 범위를 초과할 수 없다.Open the source | Defines the cap |
주택임대차보호법 제7조의2 제1호 | First rate |
주택임대차보호법 제7조의2 제2호 | Second rate |
주택임대차보호법 시행령 제9조 제1항 | 10% a year |
주택임대차보호법 시행령 제9조 제2항 | Rate added |
한국은행 통화정책방향(2026.8.27) Show original text금융통화위원회는 다음 통화정책방향 결정시까지 한국은행 기준금리를 2.75%에서 3.00%로 0.25%p 상향 조정하여 통화정책을 운용하기로 하였습니다.Open the source | Base rate |
Checked on 2026-10-06
Official sources checked
- 국가법령정보센터 주택임대차보호법 (시행 2026-01-02, 법률 제21065호)
- 국가법령정보센터 주택임대차보호법 시행령 (시행 2026-07-01, 대통령령 제36423호)
- 한국은행 통화정책방향 (2026.8.27)
The base rate changes whenever the Bank of Korea Monetary Policy Board changes it. Only values checked after the change are shown here.
Jeonse to Monthly Rent Conversion: the Legal Cap and the Formula