Rule of 78 Unearned Interest Rebate Calculator for 60-Month Auto Loan with 24 Payments Left
A 5-year car loan with substantial precomputed interest, being paid off with 24 payments still outstanding.
Calculates the remaining unearned interest (rebate) on a precomputed loan using the Rule of 78 method. Enter your Total Precomputed Interest, Remaining Payments, Original Total Payments to get an instant unearned interest rebate. Formula: (total_interest * (remaining_payments * (remaining_payments + 1))) / (original_payments * (original_payments + 1)).
Unearned Interest Rebate
Fill in the fields above and click Calculate
Comparison ()
| Field | |
|---|---|
| Result |
Formula
Step-by-step
Variables
Recent Calculations
How It Works
How It Works
The Rule of 78 is a method used to calculate how much interest is still unearned on a precomputed loan when it is paid off early. Instead of spreading interest evenly, this method gives more weight to the earlier payments in the loan term.
The calculator applies a formula that multiplies the total precomputed interest by a fraction based on the remaining payments. This fraction reflects how much of the loan term is left, using a weighted system that counts down over time.
- Interest is weighted more heavily toward the beginning of the loan
- Remaining payments are multiplied by (remaining payments + 1)
- Original total payments are multiplied by (original payments + 1)
- The result shows the portion of interest that has not yet been earned
Understanding the Results
The result is the unearned interest rebate. This is the amount of interest that should be returned to you if the loan is paid off early.
Because the Rule of 78 favors the lender in the early months, the rebate may be smaller than expected if the loan is paid off later in the term. The earlier you repay, the larger the rebate tends to be.
- The output is shown in the same currency as the total interest entered
- A higher number of remaining payments increases the rebate
- Fewer remaining payments means less unearned interest left
- This value represents the interest you may save by paying early
Frequently Asked Questions
What does this Rule of 78 calculator compute?
This calculator computes the remaining unearned interest (rebate) on a precomputed loan using the Rule of 78 method. It determines how much interest has not yet been earned by the lender when you pay off the loan early. The result represents the interest portion that may be refunded or credited to you.
When should I use the Rule of 78 calculator?
Use this calculator if you are paying off a precomputed loan early and want to estimate the interest rebate. It is commonly used for auto loans or personal loans that apply the Rule of 78 method. Check your loan agreement to confirm that this method applies to your loan.
What is 'total precomputed interest'?
Total precomputed interest is the full amount of interest calculated at the beginning of the loan for the entire term. For example, if you borrowed money and the lender added $1,200 in total interest over 12 months, then $1,200 is the total precomputed interest. Enter this full interest amount, not just the remaining balance.
How do I determine the number of remaining and original payments?
Original payments refer to the total number of scheduled payments for the entire loan term, such as 36 or 60 months. Remaining payments are how many payments you still owe at the time of payoff. For example, if your original loan was 48 months and you have 18 payments left, enter 48 as original payments and 18 as remaining payments.
Why is the rebate smaller than I expected?
Under the Rule of 78, more interest is allocated to the earlier months of the loan. This means that even if you pay off the loan early, a larger portion of the interest may already be considered earned. As a result, the rebate is often smaller compared to simple interest loans.
What does the result represent?
The result shows the unearned interest rebate in the same currency as your total interest input. This is the portion of the precomputed interest that has not yet been earned by the lender. It may reduce your payoff amount depending on your lender’s policies and local regulations.
Disclaimer
This financial calculator provides estimates only. Actual results may vary. Consult a qualified financial advisor for personalized guidance. Disclaimer.