Check My Costs

About CarBuyerKit

Helping Car Buyers Understand the Real Cost Before They Buy

CarBuyerKit provides independent calculators and guides that help U.S. car buyers understand vehicle taxes, title and registration charges, dealer fees, trade-ins, and out-the-door costs before signing a deal.

Why CarBuyerKit exists

A vehicle advertised at one price can cost more after taxes, title charges, registration, dealer-controlled fees, trade-in treatment, and state-specific rules are applied. Those costs are often spread across agency guidance, fee schedules, and the buyer's order.

CarBuyerKit brings the supported pieces together so buyers can understand the likely cost earlier, compare estimates, and ask clearer questions before reaching the dealership. The goal is clarity—not criticism of dealers or a substitute for an itemized final quote.

What you can do with CarBuyerKit

State-specific cost calculatorsChoose a supported state and estimate the costs that apply to that transaction.Out-the-door estimatesBring supported taxes, government charges, dealer-entered costs, and optional products into one estimate.Vehicle tax calculationsEstimate state and supported local vehicle taxes using the rules and transaction details that matter.Registration and title estimatesReview supported registration, plate, title, and transfer costs without treating every transaction alike.Dealer fee reviewOrganize quote items into government charges, dealer-controlled fees, optional products, and items to clarify.Trade-in equitySeparate a vehicle's trade value from its loan payoff and understand positive or negative equity.Car affordabilityWork backward from a target payment while accounting for APR, term, down payment, trade equity, and estimated fees.Lease buyout planningCompare a lease purchase estimate with an entered market value and model possible monthly payments.Used-car inspection checklistRecord observations, flag concerns, and prepare questions before buying a used vehicle.State-specific guidesRead practical explanations of taxes, fees, trade-ins, title rules, and common buyer questions.

How our information is researched

Research prioritizes primary sources: state motor-vehicle agencies, departments of revenue or taxation, statutes and regulations, official fee schedules, and government forms or guidance. Pages show verification information where appropriate because state rules and published amounts can change.

If official sources conflict or do not clearly support an amount, the difference is disclosed rather than silently guessed. Calculators use deterministic, state-specific code for their supported inputs; they do not generate an answer with AI at runtime. The result is still an informational estimate, not a guaranteed official assessment.

Read the Editorial Policy for source and correction standards, and the Calculator Methodology for calculation scope, assumptions, and exclusions.

Independent, not official

CarBuyerKit is independent. It is not a DMV, government agency, dealership, lender, insurer, or tax authority. No partnership, government endorsement, or professional credential is implied. Calculator results are planning estimates that buyers should compare with current agency guidance and written transaction documents.

Current state coverage

CarBuyerKit currently provides state-specific tools for the active states below. Each state hub lists the calculators and guides that are available for that state.

  • Texas
  • Florida
  • California
  • New York
  • Pennsylvania
  • Illinois
  • Ohio
  • Georgia
  • North Carolina
  • Michigan
View All States Explore Calculators

Questions, corrections, or feedback?

If you spot outdated information, a calculator issue, or a broken official-source link—or simply have a question—email us at getinfo@carbuyerkit.com.

Contact CarBuyerKit