Development Charge Calculator

Development Charge Calculator helps model Korea-related development, construction, redevelopment, conversion, or project-cost assumptions in English.

Development charge calculator

Uses the Korean development-gain recovery model for direct or detailed gain, planned-site 20 percent rate, individual-site 25 percent rate, regional area thresholds, and temporary 2024 to 2026 reduction scenario.

Korean source inputs

Development gain

₩212,143,833

End value minus start value, normal growth, and development cost.

Charge subject

Yes

Threshold 990 sqm.

Base charge

₩53,035,958

25% statutory charge rate.

Reduction

₩0

No temporary reduction.

Final charge

₩53,035,958

After subject test and temporary reduction.

Effective rate

25%

Final charge divided by development gain.

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

Related calculators

Development charge calculator

This guide follows the Korean development-charge model for development gain, land price before and after development, normal increase, development cost, charge rate, area threshold, and temporary reduction.

Rate and threshold

Planned-site projects use 20 percent, while individual-site projects use 25 percent. The Korean calculator keeps project type as an input because it directly changes the charge rate.

Area thresholds are 660, 990, and 1,650 sqm depending on region and project facts. Projects below the applicable area threshold may be outside the charge target even if land value increased.

Development gain formula

The chargeable development gain is broadly after-development land value minus before-development land value minus normal land-price increase minus recognized development cost. Documentation quality often decides whether costs are recognized.

The temporary reduction scenario is capital region 50 percent, non-capital 100 percent in the Korean guide. The calculator exposes reduction separately so users can compare normal and reduced outcomes.

Practical use

Review project approval date, completion date, official land values, appraisal materials, recognized costs, area, region, and whether the project type is actually subject to the charge. The estimate should be reconciled with the local government notice.