Gap Investment Calculator

Gap Investment Calculator helps compare Korea-related property income, yield, purchase cost, and holding-period scenarios in English.

Gap investment calculator

Uses the Korean gap-investment model for purchase price, jeonse deposit, acquisition tax, registration cost, property tax, transfer tax, jeonse renewal cash flow, leverage, and price sensitivity.

Korean source inputs

Required funds

₩108,900,000

Gap ₩100,000,000.

Jeonse ratio

80%

Leverage multiple 4.6x.

Acquisition tax

₩5,500,000

Effective 1.1%.

Net profit

₩27,362,922

Annualized return 8.4%.

Final jeonse change

₩0

Jeonse renewal cash inflow.

Warnings

1

Risk notes from the Korean source.

This English calculator calls the same pure Korean calculation function used by the Korean page. Inputs and labels are translated; the formula is not replaced by a generic stub.

Related calculators

Gap investment calculator

This English page follows the Korean gap investment calculator for purchase price, jeonse deposit, required cash, tax, and exit return.

Required funds

Gap investment starts with gap = purchase price - jeonse deposit. The Korean source then adds acquisition tax, local education tax, special rural tax, brokerage fee, registration cost, and other acquisition cost to calculate required funds.

The jeonse ratio is a risk signal, not only a leverage input. The Korean source treats 70 percent, 80 percent, 90 percent, and higher ratios as different risk zones and warns when the ratio approaches reverse-jeonse territory.

Acquisition and holding tax

The 2026 housing acquisition-tax logic preserves the 1 percent to 3 percent one-house band, regulated two-house 8 percent, regulated three-house 12 percent, non-regulated three-house 8 percent, and four-house 12 percent rules.

Property tax uses a 0.7 assessed-value ratio and progressive residential property-tax brackets. The holding cost is multiplied by the selected holding months before the sale-return calculation.

Sale and jeonse renewal

Sale analysis resolves sale price by annual appreciation or direct expected sale price. It then applies brokerage, necessary expenses, long-term deduction, basic deduction of KRW 2.5 million, capital gains tax, local income tax, and net profit.

Jeonse renewal cash flow uses a 24-month renewal cycle. If the final jeonse deposit is lower than the initial deposit, the source marks it as reverse jeonse and shows the extra cash needed to return the deposit.