About GougeProof
GougeProof is a free calculator for comparing a car deal all in, with every fee on its own line and every default showing where it came from.
By Mr. Voltage · Page changed Oct 14, 2026
Who builds it
GougeProof is built and run by Mr. Voltage, under the studio name Mr. Voltage Studios. Mr. Voltage is the byline on every page here, and it links to the methodology page, because that is what the byline stands behind.
Why it exists
It began as one page that put three vehicles side by side for a real purchase, with the fees a dealer would rather you not add up shown as lines you could change. The quoted monthly payment was never the whole price, and the rest was spread across the paperwork.
The brand idea is People over predatory pricing, and the tagline is Fair numbers. Brighter decisions. The name is the promise: proof you are not being overcharged, with the working shown.
What we promise
These are printed in the footer of every page:
- Every default shows where it came from and the date it was checked.
- We never sell or pass on your details.
There are no offers on GougeProof yet, so there is nothing to rank. When there are, this promise applies: Offers are never ranked by what they pay us.
Where a default comes from is shown beside it on the calculator, and the methodology page says how every figure is worked out. The data changes page lists each correction.
What GougeProof is not
- It is not a lender or a broker, and it does not make loans or find you one.
- It does not tell you which car or loan to choose. It shows the numbers and the trade-offs, and the choice is yours.
- It does not know your dealer’s final paperwork. Its figures are estimates; see the terms.
Who pays for it
Nothing pays for it today. How we make money says what that may become.