Everyday calculations, with sources
Legal & Tax Calculators
From inheritance to child support and severance pay, open the calculator you need.
Inheritance by representation calculator
See the shares of a predeceased child's spouse and children as exact fractions with the inheritance by representation calculator.
Open calculator →Reference toolStatutory inheritance share calculator
Check the priority of descendants, ascendants, siblings and collateral blood relatives, and the spouse's statutory share.
Open calculator →Reference toolReserved inheritance share calculator
Estimate a reserved inheritance share from the calculation base and statutory share, then compare it with the amount actually received.
Open calculator →Reference toolInheritance tax calculator
Estimate inheritance tax using the lump-sum, spouse and financial-asset deductions. This is not an official filing amount.
Open calculator →Reference toolGift tax calculator
Check relationship-based deductions, marriage and childbirth deductions, and generation-skipping surcharges. A reference tool for a single gift.
Open calculator →Reference toolChild support calculator
Check average child support by income and age band, and the non-custodial parent's contribution, using the Seoul Family Court's 2021 guidelines.
Open calculator →Reference toolLate-payment interest calculator
Estimate simple interest from the principal, dates and annual rate, with separate periods before and after service of a complaint.
Open calculator →Reference toolCourt fee calculator
Estimate first-instance civil court filing fees and service deposits, including the electronic-filing reduction and current service charge.
Open calculator →Reference toolSeverance pay calculator
Enter employment dates and wages before leaving to check average wages, days of service and a pre-tax severance estimate.
Open calculator →Each calculator has its own address
Choose the inheritance share calculator to check family members' statutory shares, or the gift tax calculator to estimate tax on a gift. Each page explains its inputs, method, limitations and official sources. Do not treat one result as a definitive premise for another calculation; check the facts and applicable date first.