ABOUT DEALPROOF
The deal should make sense before you sign it.
DealProof turns a crowded vehicle quote into numbers a buyer can independently check: complete price, amount financed, payment, interest, trade equity, fees, and optional products.
Why it exists
Vehicle negotiations often return to one question: “What monthly payment do you want?” A payment alone does not reveal the selling price, loan length, total interest, trade shortfall, or products inside the loan. DealProof keeps those inputs visible.
What DealProof is
DealProof is a free educational calculator and buyer guide. Its tools run in the browser, require no account, and are designed for comparing written figures before a purchase.
What DealProof is not
DealProof is not a dealership, lender, broker, insurer, credit counselor, tax adviser, or law firm. It does not make financing offers, determine vehicle value, pull credit, or guarantee that a charge is legal or competitive.
How the work stays transparent
The formulas and assumptions are published on the methodology page. Buyer guides link to relevant public consumer information. Calculations are labeled as estimates and leave state-specific tax treatment under the user's control.
How the site can be funded
DealProof may eventually use clearly labeled advertising or partner links. Compensation will not change calculator results. Any affiliate relationship will be disclosed where relevant and on the affiliate-disclosure page.