All You Need to Learn About: What Is the Rule of 78?

Jul 20, 2022 By Susan Kelly


The Rule of 78 increases the lender's profit by weighting more heavily months earlier in a borrower's loan cycle when computing interest. It is common practice to utilise this kind of interest computation schedule for fixed-rate, non-revolving loans. Borrowers who may want to settle off their debts early should consider the Rule of 78. Here in this article, we have guided what is rule 78 for our readers.

How To Apply The Rule Of 78

Consumers should be aware that they would still make the same price of money for a Rule of 78 Loan because they would for a total interest loan provided they make all of the required payments over the specified period of the loan, such as 24 instalments on a two-year credit, 36 instalments on a three-year lease, etc. If the borrower settles the loan early, there is a difference. In other words, a Rule of 78 Credit turns lopsided in favour of the lender when a 2-year loan is repaid in just one year or a 3-year mortgage in 24 months.

The Rule of 78 approaches determines interest throughout the loan and divides that interest into monthly payments using a reverse summation of digits. For instance, if the loan was for a year, you could add the digits 1 to 12 (1+2+3+4, etc.), giving you the number 78. This is how the name of the approach came about. After that, you divide the interest owing in instalments according to each month in the opposite order. To put it another way, you might pay 12/78 of the interests in the first month, 11/78 in the second, and so on until you pay 1/78 of the interest in the final month.

What Distinguishes The Rule Of 78 From Simple Interest?

There is a far better (and more popular) approach for lenders to employ when calculating interest than the Rule of 78, which can be utilised for some loans (often subprime vehicle loans). In the case of simple interest, your transaction is used to cover the interest due for the current month first before lowering the principle. You don't ever pay interest on cumulative interest because simple interest is only computed on the original of your loan amount.

Simple interest computes your monthly interest payment using the same everyday interest rate, as opposed to the Rule of 78, which reduces the amount of charge you pay each month. Since your principal balance will decrease while you finish off your loan, the interest you pay will also decrease, but you will continue to use the same amount to determine your monthly interest expenses.

The Significance Of Rule 78

Knowing the type of financing that will be incorporated into your loan's repayment schedule is crucial, especially if you want to pay it off early. The Rule of 78's interest structure benefits the lender more than the consumer in a few different ways. According to Andy Dull, vice chairman of credit screening for Freedom Financial Asset Management, a loan reduction company, the Rule of 78 will not affect the total interest paid if a loan is repaid the actual number due each month for the duration of the loan.

"However, it matters whether a borrower is thinking about the possibility of repaying the debt early. The Rule of 78 requires the borrower to pay a more significant percentage of the interest early in the loan tenure. In other words, applying the Rule of 78, paying off a loan in full far sooner than expected offers little in the way of benefits or financial savings.


Avoid loans that employ this technique if you can because the Rule of 78 could easily disrupt your attempts to pay off an instalment loan early. Fortunately, even in situations where its application would still be permitted, the Rule of 78 has lost chiefly favour. Unless you're a subprime borrower looking for an auto loan with 60 months or less term, you probably shouldn't need to bother about it.

Keep in mind that lenders that continue to finance your debt under the Rule of 78 aim to make as much profit from doing so as is legally possible. It's good to know how your interest accrues is calculated even if you don't plan to pay off the mortgage early in case you decide to switch up your repayment plan in the midst of your period.

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