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Deposit-to-rent conversion calculator

Check the Korean cap on monthly rent when converting a deposit, under Article 9 of the Housing Lease Protection Act Enforcement Decree (the lower of 10% a year and the base rate + 2%).

Information needed

Enter amounts in Korean won (KRW), without commas. Do not enter names or resident registration numbers.

3.00% a year as announced by the Bank of Korea on 22 October 2026. Change it if it has since changed.

After changing an entry, calculate again. This calculator does not transmit or store your entries.

Reference results

Check the entries, then select Calculate.

Formula

When all or part of a deposit is converted into monthly rent during the lease, the rate may not exceed the lower of 10% a year and the Bank of Korea base rate plus 2%. Monthly rent cap = converted deposit × rate ÷ 12. At a 3.00% base rate the rate is 5%, so KRW 100 million gives KRW 416,666 a month.

What this calculator cannot apply

This cap applies to converting a deposit within an existing lease. Rent in new leases, regional market conversion rates and commercial leases (separate rules) are not covered.

Scope of results and official alternatives

Bank of Korea ↗shows the current base rate; for disputes contact the Housing Lease Dispute Mediation Committee or the Korea Legal Aid Corporation (132).

Calculation basis and official sources

This material is based on sources checked on November 7, 2026 (KST). Check subsequent amendments and transitional provisions for your particular case separately.