CalKit

Mortgage Refinance Calculator

Compare loans to analyze refinancing benefits.

원
%
%
개월
원
월 절감액
대환 유리
159,992원

비교 분석

현재 월 상환액1,319,911원
대환 후 월 상환액1,159,919원
월 절감액159,992원
현재 총 이자116,778,640원
대환 후 총 이자78,380,560원
이자 절감액38,398,080원
대환 비용−2,000,000원
순 절감액36,398,080원
손익분기점13개월

Overview

The Mortgage Refinance Calculator compares your existing loan with a new lower-rate loan to show potential savings. Enter the remaining balance, current rate, and new rate to see changes in monthly payments and total interest saved.

Formula

Monthly Payment (amortized) = Balance × r × (1+r)^n / ((1+r)^n - 1). Net Savings = Old Total Interest - New Total Interest - Refinancing Costs (prepayment penalty + closing costs).

How to Use

  1. 1Enter the remaining balance and interest rate of your current loan.
  2. 2Enter the remaining term of your current loan.
  3. 3Enter the new loan's interest rate and term.
  4. 4Enter refinancing costs (prepayment penalty, stamp duty, etc.).
  5. 5Click Calculate to see the monthly payment difference and total savings.

Tips

  • ✔Refinancing benefits increase with larger rate differences and longer remaining terms.
  • ✔Wait until the prepayment penalty period expires (often 3 years) to maximize savings.
  • ✔Always include all closing costs (stamp duty, mortgage registration fees) to calculate true net savings.

FAQ

Q. When is refinancing worthwhile?

Refinancing typically makes sense when the rate difference is at least 0.5 percentage points and the remaining term is long enough for interest savings to exceed the refinancing costs.

Q. What costs are involved in refinancing?

Typical costs include the prepayment penalty on the old loan (0–1.5% of balance), stamp duty on the new loan, mortgage registration fees (about 0.2–0.4% of the loan amount), and processing fees.

Q. Does refinancing affect my credit score?

Refinancing involves a credit inquiry which may cause a small, temporary dip. However, maintaining a good repayment record means the long-term impact is minimal. Avoid multiple loan inquiries in a short period.

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