Deal Summary
Bring selling price, down payment, trade value, payoff, and negative equity into one transaction overview.
PistonPaper an independent second opinion
Know the numbersbefore you sign.
A clear, plain-English read on the price, trade, financing, fees, and add-ons in a vehicle deal—so the monthly payment is only part of the story.
Built for the moment before a signature, when a second set of eyes can help the paperwork make sense.
The full picture
Beyond the payment01
Selling price and down payment
02
Trade value, payoff, and negative equity
03
APR, term, and monthly payment
04
Fees, add-ons, and total loan cost
Items worth a closer look, with questions you can take back to the dealer.
Clearer context. Your decision.
A deal is more than one number
Read the whole deal, line by line.
PistonPaper connects the figures that shape what you pay today and what the loan costs over time.
How the review worksPayment Check
Understand APR, term, payment, interest, and total cost together. Try changes to price, down payment, trade, optional products, APR, or term and see their effect on amount financed, payment, interest, and total cost.
Fee Check
Understand taxes, government charges, dealer fees, and optional products. Required and optional items are separated only when that can be determined reliably.
A calmer way through the paperwork
From buyer’s order to better questions.
The review is designed to turn a dense document into a clearer conversation—without pretending to make the decision for you.
01
Bring the buyer’s order
Upload or photograph the paperwork you want to understand.
02
See each number in context
Get a plain-English look at the line items, financing structure, and what changes the full loan cost.
03
Leave with better questions
Review items worth asking about and use a deal-based script to keep the conversation clear and professional.
Consumer education, by design
Clarity without a verdict.
PistonPaper can flag charges worth reviewing and explain what questions to ask. It does not label a charge illegal or fraudulent based on a guess.
PistonPaper is not a lender, does not make credit decisions, and does not provide legal advice. It does not guarantee savings or judge whether a deal is good, approved, or compliant. You stay in control of what you ask and what you sign.
For shoppers and the people who support them
Make the fine print feel less final.
Start with a free auto-loan estimate or review the figures on a buyer’s order before you sign.