Early Payoff Explained: Simple Interest, Precomputed, and the Ibra Rebate

Paying a car off early sounds like an obvious win. The size of that win depends entirely on the kind of contract you signed, and it is one of the few places where two buyers with identical payments end up thousands of dollars apart.

Simple Interest: Interest Accrues Daily

In a simple-interest contract, the finance charge accrues on the unpaid balance each day. Paying early stops the accrual, so the payoff quote is the balance plus the interest that has accumulated since the last payment. This is the most common structure on prime auto loans, and it behaves the way most people expect.

Precomputed: The Charge Is Calculated Up Front

A precomputed contract adds the entire finance charge at signing and then spreads it across the payments. Paying early does not automatically remove the unearned portion, so a rebate is applied instead. That rebate is calculated by a formula, sometimes called the Rule of 78s, and it returns less than simple interest would in the early years. Several states restrict or ban this structure, and it still appears in some subprime lending.

Murabaha: A Fixed Sale Price, Plus Ibra

Here the total is a sale price agreed at signing, and the price itself does not shrink with time. An early-payoff rebate, called Ibra, is a separate thing: sometimes promised in the contract with a formula, and sometimes left to the financier's discretion. If it is discretionary, it is not something you can plan around, whatever the practice turns out to be.

How to Work Out What You Should Save

• Ask for the payoff quote in writing, with the date it expires.
• Ask which contract type you have: simple interest, precomputed, or a fixed sale price.
• If it is precomputed, ask for the rebate formula in writing before you pay.
• If it is a Murabaha, ask whether Ibra is contractual or discretionary, and get the answer in the contract.
• Do not accept a verbal assurance from the finance office. The contract is the thing that decides it.

The Question Worth Asking First

Before optimizing the payoff, check whether paying off early affects anything else. Some rebates are contingent on keeping the loan open for a period, and some financing incentives are clawed back. Read the rebate terms alongside the payoff terms, because they interact.

Carummah explains how contracts work and does not issue religious rulings, so ask a qualified scholar.