Understanding Your Interest Rate — Why Subprime Rates Are High and How to Get Them Lower
If you have bad credit and you’ve been approved for a car loan — or you’re looking at getting one — you’ve probably seen the interest rate and had one of two reactions. Either you didn’t fully understand what it meant. Or you understood exactly what it meant and it made you angry.
Both of those reactions are valid. Subprime interest rates are high. There’s no sugarcoating that.
But here’s what most people don’t understand — why they’re high, what they’re actually costing you in real dollars, and most importantly what you can do about it over time.
After 26 years as the General Manager of an independent used car dealership I’m going to give you straight answers on all three.
Why Subprime Rates Are High
When a lender approves a car loan they’re taking a risk. They’re betting you’re going to make your payments for the life of the loan. The higher the risk they perceive — the higher the rate they charge to compensate for that risk.
With a prime borrower — someone with a 700 plus credit score, stable long term employment, and a clean credit history — the risk is low. The lender charges a low rate because the odds of getting paid back are very high.
With a subprime borrower the lender sees more risk. So they charge a higher rate. That higher rate is how they offset the possibility that some percentage of subprime loans will default.
It’s not personal. It’s math.
And here’s what I want you to understand — a high interest rate on this loan does not mean you’re stuck with a high interest rate forever. This loan — if you manage it right — is the first step toward a lower rate on your next loan.
What Your Rate Is Actually Costing You
Let me give you real numbers so you can see exactly what your interest rate means for your total cost.
Let’s say you’re financing ten thousand dollars — a pretty typical amount on a subprime deal.
At twenty-four point nine percent APR over forty-eight months your monthly payment is about three hundred and twenty dollars. By the time you make your last payment you will have paid back about fifteen thousand three hundred dollars on a ten thousand dollar loan. That’s five thousand three hundred dollars in interest.
At eighteen percent — same loan — your monthly payment drops to about two hundred and ninety-three dollars and your total interest drops to about four thousand dollars. That’s thirteen hundred dollars saved just from a six percent rate reduction.
At twelve percent your total interest drops to about two thousand six hundred dollars. That’s over twenty-seven hundred dollars saved compared to twenty-four point nine percent on the same ten thousand dollar loan.
This is why your interest rate matters. And this is why refinancing when you’ve built some positive history is one of the smartest financial moves a subprime borrower can make.
Use the free auto loan calculator on my website to plug in your own numbers and see exactly what your rate is costing you — and what a lower rate would save.
How Your Rate Is Determined
Your rate comes down to several factors working together.
Your credit tier is the starting point. As I covered in my video on credit score tiers — Prime is 700 and above, Secondary is 600 to 699, Subprime is 520 to 599, and Deep Subprime is below 520. Each tier has a rate range associated with it. The lower your tier the higher your rate.
The loan term also affects your rate. Longer terms often carry slightly higher rates in subprime because the lender is taking on more risk over a longer period.
The vehicle matters too. Lenders look at the age and mileage of what you’re financing. An older high mileage vehicle is higher risk collateral — if they have to repossess and sell it they recover less money. Some lenders charge higher rates or won’t finance older vehicles at all.
And your specific credit profile — beyond just your score — factors in as well. Your recent payment history, open collections, time on the job, and income stability all affect where within a tier’s rate range your deal lands.
The Dealer Markup — What Most Finance Managers Won’t Tell You
Here’s something most people never hear about — the concept of dealer markup on the interest rate.
When a lender approves your deal they give the dealer what’s called a buy rate — the minimum rate the lender will accept. The dealer is then allowed to mark that rate up by a certain amount — typically one to three percent — and keep the difference as additional profit.
So if your buy rate is twenty-two percent and the dealer marks it up two percent — you’re signing at twenty-four percent and the dealer is earning additional income on that spread.
This is legal and standard practice in the industry. I’m not telling you this to make you angry — I’m telling you so you understand that the rate you’re quoted is sometimes negotiable. If you feel the rate is too high it’s okay to ask the finance manager if there’s any flexibility. They may say no. But sometimes there is room.
Knowing this exists means you’re walking in informed. And informed buyers get better deals.
How to Get a Lower Rate — The Refinancing Roadmap
The answer to getting a lower rate is refinancing. Here’s the exact roadmap.
Make every payment on time for the first twelve months. No exceptions. Every on time payment gets reported to the credit bureaus and moves your score.
Don’t apply for a lot of new credit during that time. Every hard inquiry temporarily lowers your score. Be disciplined and let your auto loan do the work.
At the twelve month mark check your credit score. If it’s moved — even twenty or thirty points — start shopping for a refinance.
Go to your bank or credit union first. Once you have twelve months of positive payment history many credit unions will work with you at significantly better rates. Credit unions in particular are known for being more flexible with members who can show improved credit behavior.
Make sure the refinance is actually worth it. Look at the new rate, the new term, and the total interest you’ll pay. Sometimes a slightly lower rate on a longer term actually costs you more total money. Run the numbers on the calculator before you commit.
What Not to Do
Don’t obsess over the rate to the point where you walk away from a deal you actually need. A twenty-five percent rate on a reliable vehicle that gets you to work is better than no vehicle at all.
Don’t extend your loan term just to lower your monthly payment without understanding what it costs you in total interest.
Don’t fall for credit repair companies that promise to lower your rate right now. Nobody can do that except your lender through a legitimate refinance after you’ve demonstrated positive payment behavior.
And don’t miss a payment trying to save up for a refinance. Your payment history is everything. Protect it above all else.
Your interest rate is high right now because of where your credit is right now. That’s not permanent. Every on time payment moves you closer to a lower rate — and over twelve to twenty-four months the difference is real money in your pocket.
Gary is a 26-year veteran General Manager of an independent used car dealership specializing in subprime and bad credit auto financing. He founded Bad Credit Car Guy to give consumers and dealers straight answers about how subprime financing actually works.
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