Start with the amount financed, APR, finance charge, total of payments, and payment schedule. Compare those numbers with the deal you agreed to, then read the itemized charges and the terms that explain what happens if you pay early or late. Do this before you sign, even if the monthly payment looks right.
I want you coming into the finance office with your numbers already settled. That's a big part of how the finance office works. Once the contract is in front of you, the job is making sure those numbers survived the trip from the sales desk.
A familiar payment isn't enough. You can get to the same payment with a different price, a longer term, or more money down. The paperwork should let you see exactly which deal you're buying.
Ask for the completed agreement before signing
Read the actual purchase and financing documents, with the terms filled in, before agreeing to them. A payment quote or product menu isn't the complete credit agreement. Ask for the Truth in Lending disclosures and enough time to compare them with your written offer, including any changes made since you accepted it.
With dealer-arranged financing, the document may be called a retail installment sale contract. The dealer often sells that contract to a lender that collects your payments. With outside financing, the loan documents may come directly from your bank or credit union.
Either way, check the names and the vehicle identification number. Confirm that the car on the paperwork is the one you're taking home. If there's a co-buyer, make sure both people understand what they're signing.
On a tablet, ask to see the whole document. Scrolling through the terms is part of signing. You don't have to make a decision from a signature box while the rest of the agreement stays offscreen.
Make the amount financed add up
The amount financed is the amount of credit provided for the transaction. Trace it back to the vehicle price, taxes and fees, selected products, down payment, and trade figures. Ask for an itemization if you don't have one. You should be able to explain how the deal reached that number.
Here's a simplified example with no prepaid finance charges, meaning certain credit costs paid upfront or deducted from the loan proceeds. The vehicle costs $27,000. Taxes and fees add $2,300, and a product you chose adds $1,200. That puts the purchase at $30,500 before your down payment and trade equity.
Subtract a $3,500 cash down payment and $2,000 of positive trade equity, and the amount financed is $25,000.
The trade equity is what remains after any old loan payoff, not necessarily the dealer's entire trade allowance. If the trade is worth $15,000 and its payoff is $13,000, you've got $2,000 to apply. If the payoff is higher than the trade value, ask where that shortage appears in the new deal.
Your form may arrange the entries differently, especially if there are prepaid finance charges. Have the finance manager walk you through the itemization instead of forcing every contract into this example.
If a charge itself is unfamiliar, my dealer-fee guide gives you the next questions to ask. First identify the charge. Then decide whether you agreed to it.
Compare APR with APR
Use the annual percentage rate, or APR, when comparing the cost of credit across offers. APR reflects interest and certain credit costs, so it can differ from the interest rate alone. Match the amount financed and loan term too; a lower APR doesn't explain away a larger balance or a longer repayment period.
If your outside lender quoted an APR, compare it with the APR on the dealer's final paperwork. Don't compare one offer's interest rate with the other offer's APR and assume you've found the cheaper loan.
Ask about any change from the rate you discussed. There may be an explanation, such as a different term or approval, but you need that explanation before agreeing to it.
I wouldn't accept "the payment is still where you wanted it" as the entire answer. The rate, amount, and term each deserve their own look.
Put the finance charge and total payments together
The finance charge shows the disclosed cost of credit in dollars, including interest and certain fees. The total of payments shows what your scheduled loan payments add up to. Read both alongside the amount financed. This makes the cost of borrowing visible even when the monthly payment seems manageable.
Suppose a simplified contract shows $25,000 financed, a $5,000 finance charge, and 60 payments of $500. Those payments total $30,000. The $5,000 is the difference between the credit provided and the scheduled repayment total in this example.
That's hypothetical math, not a current rate offer.
The $30,000 also doesn't include money or trade equity you already put into the purchase. Using the earlier example, you've contributed another $5,500 between cash and positive trade equity. Don't count either contribution twice, but don't forget it when comparing the overall deal.
The disclosed finance charge assumes the payment arrangement shown. Paying early or late can change what you actually pay, depending on the agreement and how interest is calculated. It isn't automatically the amount of interest you'll owe regardless of what happens.
Check the calendar as carefully as the payment
Read the number of payments, their amounts, the first due date, and the remaining schedule. Confirm whether any payment differs from the others, including a larger final payment. A monthly amount you recognize can still come with a term or timing you never intended to accept.
If you negotiated 60 months, check that the final contract still says 60. Don't let a term change slip through because the payment moved only a little.
Look at when that first payment is due. Then ask how you'll get the lender's account information and payment instructions. A promise that "something will come in the mail" isn't a reason to ignore the date on your contract if nothing arrives.
You don't have to arrange everything at the desk, but you should leave knowing whom to contact. The dealership can help identify the lender; the lender or servicer can confirm how the account will be paid.
Give each add-on its own decision
Check the separate price of every optional product and confirm that the products on the contract are the ones you selected. If you're financing them, their prices increase what you're borrowing and can increase the interest you pay. A small change in the payment doesn't tell you the full purchase cost.
Ask for the price of the service contract, GAP, or other product in dollars. Then look at its separate agreement for coverage, exclusions, and cancellation terms. The finance contract shows how you pay for it; the product agreement explains what you bought.
If you declined a product and it appears in the paperwork, stop and have it corrected. If you change your mind about buying something before signing, ask for the revised documents and check the new figures.
Don't rely on a promise that somebody will clean it up afterward. A correction now is easier to verify while all the paperwork is still in front of you.
Read the terms for paying early or falling behind
Check the agreement's prepayment provisions, late-payment terms, and what happens if you default. Also confirm any required vehicle insurance and the lender's interest in the car. These sections explain obligations that the payment box can't. Ask about wording you don't understand before deciding the contract is ready to sign.
Don't assume every loan has the same early-payoff rules. The contract and applicable state law matter. If someone tells you to keep the loan open for a certain number of months, ask whether that is a contractual requirement or a request, and have them point to the relevant terms.
For late payments, check the due date, when a fee can apply, and the consequences described in the agreement. A late-fee grace period is not permission to treat the due date as optional.
You aren't being difficult by asking. You're taking on a payment that may be with you for years. Understanding what happens when the plan changes belongs in the same conversation as choosing the payment.
A few questions that come up at signing
You can ask to review the numbers away from the signing screen, request a correction, and keep a usable copy of what you signed. Settle those details before delivery. Know which version you’re reading and whether it matches the agreement you’re being asked to make.
Can I take the financing disclosures home to review?
Yes, you can ask for the completed disclosures before signing and take them away to review or compare. Confirm how long the offer and vehicle availability will remain open. Taking time to read doesn't guarantee that a quoted rate or a particular car will be held indefinitely.
Should I sign if the price is right but another number is wrong?
Get the discrepancy corrected first. A right vehicle price doesn't cancel out an incorrect down payment, product charge, term, or trade payoff. Ask for revised documents, then check the figures again. Signing with a verbal promise to fix the paperwork later creates a problem you could settle before committing.
Are electronic copies enough?
You may receive electronic copies, but make sure you can open, save, and print them. Confirm that you're getting the completed signed agreements, not just a quote or an unsigned preview. If you can't access the files, ask for usable copies before leaving the dealership with the car.
Before you finish, read the agreement once more as a whole. Make sure the blanks that need information are filled, both sides have completed the signing, and you have your copies. Ask whether financing is final and whether anything remains conditional.
For the rest of the purchase, keep my car-buying guide handy. At the signing desk, I'd use one test: can you point to the deal you agreed to in the documents you're about to sign? If you can't, keep asking until you can.