Financial Calculator
How much interest is on my loan, what will my investment be worth in 10 years with compound interest, how much is real-estate acquisition tax — check all 6 kinds of financial calculations right here.
| No. | Payment | Principal | Interest | Balance |
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| Year | Principal paid | Cumulative interest | Balance |
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Simple vs. Compound Interest Comparison
| Year | Cumulative principal | Cumulative interest | Balance |
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Enter cash flows (year 0 = initial investment, negative = outflow)
Monthly rent is converted as deposit + monthly rent × 100
User guide
What this tool does
Handle six kinds of financial calculations in one place: loan repayment, savings/deposit returns, compound interest, investment returns (ROI/CAGR/NPV), real-estate acquisition tax and brokerage fees, and Korean payroll income tax/VAT.
Loan Calculator
- Enter the loan amount, annual interest rate, and loan term.
- Choose a repayment method (equal principal, equal principal and interest, or bullet/interest-only).
- Your monthly payment, total interest, and total repayment are calculated instantly.
Savings & Deposit Calculator
Enter the principal, monthly contribution, interest rate, and term to calculate the maturity payout and interest earned. Simple or compound interest can be selected.
Compound Interest Calculator
Enter the initial amount, annual interest rate, term, and compounding frequency (monthly/quarterly/annually) to see a chart of your compound growth curve.
Investment Return Calculator
- ROI: (Return - Cost) / Cost × 100
- CAGR: Compound Annual Growth Rate
- NPV: Net Present Value (discount rate applied)
Real Estate Calculator
Enter the sale price to automatically calculate acquisition tax (1–3%, reflecting whether the property is in a regulated area) and the statutory real-estate brokerage fee.
Tax Calculator
Enter your annual or monthly salary to calculate payroll income tax, the four major social insurance premiums, and your net take-home pay. Also includes a VAT reverse-calculation feature.
Limitations & Notes
- Tax calculations are a simplified estimate that does not reflect dependents or other income deductions, so results may differ from actual withholding or year-end tax settlement.
- Acquisition tax and brokerage fee rates, along with tax brackets, may change with legal amendments and can differ from the latest official rates.
- Loan and investment calculations are valid only when the entered conditions (rate, term, etc.) exactly match the actual product terms, and additional costs such as early-repayment fees are not included.
- All results are for reference only. Actual tax rates and fees vary by individual circumstances, region, and time period, so we recommend consulting a professional before making important decisions.
FAQ
Can the tax calculation results differ from my actual figures?
Yes. This is a simplified calculation that does not account for deduction items such as dependents or various income deductions, so it may differ from your actual result.
Does the acquisition tax calculation account for regulated (speculation-controlled) areas?
Yes. There is an option to select whether the property is in a regulated area, and the tax rate changes accordingly.
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