Interest Rate Change Repayment Calculator

Compare a CNY loan before and after a rate change

Use this calculator to estimate how a changed annual interest rate affects a loan repaid monthly in Chinese yuan (CNY). Enter the original principal, full term, original rate, months already paid, and new rate. Choose equal-payment or equal-principal repayment. The model estimates the balance at the change point from the original loan terms, then compares the remaining schedule at the original rate with a schedule using the new rate.

It is a simplified comparison for the inputs shown, not a U.S. mortgage quote or a reading of a lender’s agreement. The result does not determine whether a rate change applies to your loan or when your lender will apply it.

Enter the original schedule and elapsed payments

1. Select the repayment method

   Choose equal payment for a level scheduled payment, or equal principal for fixed principal portions and declining interest. These are both principal-and-interest repayment patterns; neither is interest-only.

2. Set the starting principal and full term

   Enter the original loan amount in yuan and the total number of monthly periods. For example, 360 periods represent 30 years of monthly payments. The amount must be greater than zero and the term must be a whole number no greater than 1,200 months.

3. Enter both annual rates

   Use the annual rate as a percentage: enter 4.2 for 4.2%, not 0.042 and not a monthly rate. Enter the rate assumed for the original schedule and the rate assumed after the change.

4. Record how long payments have been made

   Enter elapsed years and any additional elapsed months. For five years and three months, enter 5 years and 3 months. Additional months range from 0 to 11, and elapsed payments must be shorter than the full loan term.

Review the estimated principal repaid, remaining principal, and remaining months. The comparison also shows payment figures, interest totals, and a month-by-month schedule under the changed rate. With equal-principal repayment, the displayed payment is the first payment after the change because later payments decline.

Reading the comparison

Model limits and lender confirmation

The estimate assumes the original annual rate applied throughout the elapsed period and the entered new rate applies for all remaining months. It uses monthly periods and a simplified repayment schedule. It does not model multiple historical rate changes, a balance imported from a lender statement, mid-month repricing, daily interest, fees, penalties, extra payments, arrears, balloon payments, or other nonstandard schedules. Actual repayment terms and timing depend on the loan agreement and lender. For a U.S. mortgage, use your servicer’s figures and a calculator designed for the applicable loan terms. This comparison is educational and is not financial advice.

General background on how mortgage principal-and-interest payments relate to loan amount, term, and rate is available from the Consumer Financial Protection Bureau. That U.S. guidance does not certify this calculator for Chinese lender billing.