WooaHouse Services
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Loan Interest Calculator

Calculate monthly payment and total interest by repayment method

💡 Loan Calculation Tips

  • Equal Payment: Same amount every month. Higher interest portion early, increasing principal over time
  • Equal Principal: Fixed principal + decreasing interest. Higher initial payment but less total interest
  • Under the same conditions, equal principal results in less total interest

Frequently Asked Questions

What is the difference between equal payment and equal principal repayment?

Equal payment keeps the monthly amount fixed. Equal principal splits the principal evenly, resulting in a higher initial payment but less total interest.

Can the result differ from my actual loan interest?

Yes. Interest calculation methods, late fees, and prepayment penalties vary by lender. Use this as a reference only.

What is DSR (Debt Service Ratio)?

DSR (Debt Service Ratio) measures annual debt repayments as a percentage of annual income. Korea currently enforces a 40% DSR cap.