Reverse Out-the-Door Budget Calculator
Enter the most you can spend out the door and work backward to a target selling price after estimated tax, government charges, dealer fees and add-ons.
Maximum vehicle price
Instead of asking “what will a $30,000 car cost after fees?”, reverse OTD asks “if my maximum total is $30,000, how low must the vehicle selling price be after allowing for tax and fees?”
Why reverse the calculation?
Negotiating only the advertised or selling price can still push the final deal above budget once tax, registration, dealer fees and products are added. A reverse calculation creates a price ceiling you can use before negotiating.
Example: $30,000 maximum OTD budget
If you expect $1,500 of tax and $700 of combined dealer/government charges, only about $27,800 remains for the vehicle selling price. If the dealer then adds a $1,200 protection package, the vehicle target must fall further or the OTD budget is exceeded.
Do not use down payment to increase the purchase budget silently
A $5,000 down payment can reduce the amount financed, but it does not change whether the dealer is charging $30,000 or $35,000 for the complete purchase. Decide whether your budget means maximum OTD purchase price, maximum amount financed or maximum cash due; they are different constraints.
Trade equity is also separate
Positive equity can reduce the cash/loan required. Negative equity can increase it. Keep the vehicle's purchase budget independent so an inflated trade allowance or rolled old debt cannot blur the new car's price.
Use the target in a written OTD request
Ask the dealer for the selling price and final OTD amount in writing, with dealer fees, add-ons, tax and government charges separated. FTC consumer guidance recommends getting the OTD price in writing before visiting so offers can be compared on the same basis.