Auto Refi Alarm

Experian sorts auto borrowers into five tiers by credit score: super-prime (781-850), prime (661-780), nonprime — also called near-prime (601-660), subprime (501-600), and deep subprime (300-500). These bands are Experian's own definitions and are what the Automotive Finance Market APR tables below are organised around — a lender's own underwriting may draw the lines slightly differently, but this is the vocabulary the published rate spread uses.

For a new-vehicle loan, Experian's Q1 2026 data puts average APR at roughly 4.55% for super-prime, 9.67% for nonprime, and 13.44% for subprime, with the overall new-car average around 6.39%. Deep subprime is reported as either 16.01% or 15.85% depending on the secondary source — both figures trace to the same Q1 2026 report and the discrepancy was not resolved this session; treat deep-subprime new-car APR as 'roughly 16%' rather than trusting either decimal to the second digit. The prime-tier figure specifically was not independently located this session and is deliberately not stated as a number here — Experian's own site is the place to read it before quoting it to anyone.

For a used-vehicle loan, Experian's Q1 2026 data puts the overall used-car average APR around 11.43%, with super-prime around 6.30%. Deep subprime is reported as either 21.77% or 21.60% depending on the secondary source, the same unresolved-discrepancy pattern as the new-car figure — read it as 'roughly 21-22%' rather than a precise decimal. As with new-car pricing, the prime-tier used-car figure was not independently located this session and is not stated as a number.

An auto loan's interest rate is set at origination and stays there for the life of the loan by default. A borrower who financed at a thin-file or subprime rate and later builds a real credit history does not see that improvement reflected in the existing loan automatically — the lender has no obligation to re-price it, and in the ordinary case never does. The only way to capture a tier upgrade already earned is to refinance: apply for a new loan, at the new rate, that pays off the old one.

Refinance eligibility varies by lender rather than following one fixed rule, but the recurring factors across credit-union and bank refinance programs are: the loan having built at least some on-time payment history (a brand-new loan is rarely eligible the same month it was signed), the borrower not owing meaningfully more than the car is currently worth (a positive or near-even loan-to-value position), and — for the best credit-union rates specifically — membership eligibility, which is sometimes as simple as a small one-time deposit. No single loan-age or LTV number is stated here as a rule, because none of the sources reviewed this session named one that held across lenders; shop the actual figure with two or three credit unions rather than assuming a threshold from this page.