Self-service tool

Estimate a monthly car payment

Plug in real numbers and see a real estimate, no name, no email, no obligation. This is the same math a dealer's finance office uses, done in the open so you can check any quote against it yourself. It's an estimate to help you understand the numbers, not an offer, a pre-approval, or a quote from Honda of Greenville or anyone else. The rate and term are pre-filled with a common used-car scenario, not a rate anyone has offered you — your actual Annual Percentage Rate may be higher and depends on your credit, the term, and the lender. All financing is subject to credit approval. Vehicle prices on this site include the dealership's $499 closing fee and exclude SC tax, tag, title, and registration.

Vehicle price

Cash down payment

Trade-in value (if any)

APR (interest rate, %)

Loan term (months)

Include South Carolina's IMF fee estimate (5%, capped at $500, financed rather than paid up front)

Estimated monthly payment $0

Amount financed: $0
Total interest over the loan: $0
Total you'll pay: $0

What this does and doesn't include

This covers price, down payment, trade-in, interest, and term, the core loan math. It does not include your specific APR offer (rates depend on credit, lender, and term, so use this to test a few scenarios), county-specific registration fees beyond the state IMF estimate, or optional add-ons like extended warranties. Rolling fees into the loan raises the amount financed and the total interest paid, worth knowing before you decide whether to pay them up front.

Why the South Carolina fee estimate is capped

South Carolina doesn't apply its regular sales tax to vehicles. Instead, dealers charge a one-time Infrastructure Maintenance Fee (IMF) equal to 5% of the purchase price, capped at $500. That means it stops growing once the price passes $10,000. This tool applies that same rule. See the full breakdown, including trade-in effects, in the South Carolina car tax guide.

Why is the rate what it is, and who actually decides?

Short answer: a bank decides, not the dealership. Here is the whole picture, including the part most people never get told.

The lender sets the rate, not the sales floor

When you finance at a dealership, the dealership does not lend you the money. It takes your application and sends it to lenders. Each lender that approves you sends back the rate it is willing to buy your loan at. That number is called the buy rate, and it comes off that lender's own pricing grid. Nobody on the sales floor picks it.

Where the dealership does come in

The honest version: the dealership is allowed to add an amount on top of the buy rate as its compensation for arranging the financing. It is called dealer participation or reserve, it is legal, and it is how most dealership financing has always worked. The lender's contract with the dealership caps how much can be added. That cap is set by the lender, not by law, so it is different at every lender.

Two things follow from that, and I would rather you hear them from me. You can ask what the buy rate is. And the rate is negotiable, the same way the price is. The federal consumer bureau says so plainly: dealers and lenders are not required to offer you the best rate they have.

Loan to value: the part nobody explains

LTV is the biggest reason two people with similar credit walk out with completely different answers. It is one division problem:

LTV = what you are financing ÷ what the bank says the car is worth

The denominator is not the sticker price. Lenders underwrite against a book value, usually J.D. Power (formerly NADA) or Black Book, and that number is normally lower than the retail price on the window.

The numerator is everything you finance, not just the car: the vehicle, South Carolina's IMF fee, tag and title if you roll them in, whatever you still owe on your trade beyond what it is worth, and often a service contract or GAP.

A real example of how fast it moves

A $24,000 car. The bank books it at $22,000. You roll in about $1,200 in fees and you still owe $2,000 more on your trade than it is worth. You are now asking to finance $27,200 against a $22,000 book value, which is about 124% LTV. Same credit score, completely different conversation.

Every lender sets its own ceiling on that percentage and none of them publish it. Once you are over the ceiling, the answer is not a worse rate, it is a restructure: money down, a different car, or a different lender. This is also the single most common reason a deal someone thought was done comes back the next day.

What the lender is actually weighing

Roughly in order of how much it moves the number. No lender publishes exact weights, so treat this as direction, not math:

Your credit tier. Far and away the biggest factor. See the spread below.
The car itself. Used prices higher than new at every tier, and an older, higher-mileage car has a smaller pool of lenders willing to touch it, which pushes the rate up.
LTV and down payment. Often decides whether there is an approval at all, before rate is even a question.
The term. Longer terms usually carry a rate add on top of everything else.
Income against the payment. Matters enormously in the lower tiers, barely at all in the top ones.
Time on the job and at your address. A subprime consideration. Mostly irrelevant if your credit is strong.
Which lender it lands at. Credit unions have been pricing meaningfully below banks and finance companies.

What the spread actually looks like

Average APR on a used vehicle, by credit tier. This is Experian's Q1 2026 data, the most recent tier breakdown published:

Tier	Score band	Average used APR
Super prime	781–850	6.30%
Prime	661–780	8.77%
Near prime	601–660	14.03%
Subprime	501–600	19.42%
Deep subprime	300–500	21.77%

That is a 15 point spread on the exact same cars. It is also why the 12.99% this site uses to sort inventory is a middle-of-the-road assumption rather than a promise: it is close to what a mid-tier buyer actually sees, so the payments on these pages do not under-promise.

One catch worth knowing. Experian reports on VantageScore 4.0 bands. Most auto lenders pull a FICO Auto Score, which runs on a 250 to 900 scale and weighs your auto history more heavily. The score in your banking app is often not the score the lender sees, and it can land you in a different row than the one you expected.

Why the payment moves even when the price does not

Five things, and only one of them is the rate: the term (72 months against 60 on the same loan changes the payment noticeably and the total interest a lot more), the APR, whether the IMF fee and tag and title are financed or paid up front, your down payment, and any negative equity coming across from the trade.

What actually helps you

Cash down. The only lever that moves the approval and the rate at the same time, because it lowers the amount financed and the LTV together.
Pay the fees up front. Tag, title and the IMF fee out of pocket instead of financed keeps them out of the numerator.
A shorter term, if the payment still works for you.
Clear the negative equity on your trade if you are in a position to.
Get pre-approved at your own credit union first, then let me try to beat it. Prequalifying is usually a soft pull that does not touch your score. A real application is a hard pull, so do all of your auto rate shopping inside 14 days and every scoring model counts it as a single inquiry.
Ask for the buy rate. Anywhere. Including here.

The honest disclaimer

I sell cars. I am not a lender, a lawyer, or a financial adviser, and I earn a commission if you buy one. Nothing on this page is a quote, an approval, an offer of credit, or advice about your particular situation. Your lender makes the actual decision. If you want to walk through your real numbers instead of the assumptions on this site, message me and we will do that.

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Sources, checked September 2026