The max bid formula: how much a salvage car is worth to you

The formula, in one line

Max all-in = the lower of (60% of clean retail) and (rebuilt selling price − $2,000 profit). Then work backwards: subtract repairs, transport and fees from that ceiling, and what remains is your maximum hammer.

The 60% test keeps you from overpaying on expensive cars. The $2,000 profit floor keeps you from winning cheap cars with no margin in them — 60% of a $6,000 retail car leaves too little to be worth the shop time. Run both, take the lower, and you never have to argue with yourself in the lane.

Start from the right retail number

The most common error is comping the finished car against clean-title listings. A rebuilt title resells about 35% below clean comps: nearer 30% below when you hand the buyer a complete, organized folder of receipts and inspection paperwork, and 40% below when the car is unremarkable and the documentation is thin.

So do it in two steps. Find the clean retail comp for the year, trim and mileage. Then find what rebuilt examples of that car are actually listed and selling for locally, and use that as your selling price. If you cannot find rebuilt comps for the model, that is information: cars nobody is reselling rebuilt are cars you will be sitting on.

Whatever you assume, remember your disclosure duties on the way out — a branded car has to be disclosed before you negotiate and called out in the ad, per selling branded-title cars in Utah.

Price the repair at what you actually pay

Estimate the repair as line items, the way your own shop buys:

• Parts at used pull-yard prices where a yard has the year, aftermarket for covers, lamps, fenders, hoods, grilles and radiators when they do not. Not dealer retail.
• Paint priced per panel, because that is how a paint shop bills it.
• Labor as real hours at your own rate — the hours a job actually takes, not a book number.
• Contingency in plain dollars, sized to what the damage could be hiding: nothing on a clean bolt-on front hit, a few hundred where one panel could hide a bracket, more on a side impact or anything near a rail.

What not to do: take an itemized estimate and multiply it by 1.15 or 1.35 to feel safe. A multiplier applied to an already-priced list inflates every line at once and turns buyable cars into passes. If you are uncertain, add the uncertainty as a dollar figure you can defend.

Working it backwards to a bid

Take a car with a $12,000 clean retail comp that needs a straightforward rear-end repair. Round example numbers:

• Rebuilt selling price at 35% off clean: about $7,800.
• Profit floor: $2,000 → all-in ceiling $5,800.
• The 60% test: 60% × $12,000 = $7,200. The profit test is tighter, so $5,800 is the ceiling.
• Repairs (parts + paint + real hours + contingency) $2,200 and transport $400 → $3,200 left for the hammer plus fees.
• At a $2,000 hammer the fee stack is about $785, so $2,785 total — inside the ceiling. Step up to a $3,000 hammer and fees near $900 push you past $3,900, over the ceiling.

So the max bid on this car is a bit over $2,000, not $3,200 — the fee brackets consume the rest. That is the whole reason to solve the math before the lane opens instead of doing arithmetic while a car is on the block.

You can do this on paper for every lot, or you can paste the lot link into the free max-bid calculator and let it run the fee ladder, the internet fee, the adders and the rebuilt discount for you. Same formula either way — the calculator just does not get tired at 40 lots.

The max bid is the math, not your cash

Two numbers get confused constantly. Your max bid is what the car is worth to you. Your cash or floor-plan limit is what you can currently pay. When the limit is lower than the math, the limit is a note in the margin — "capped at $4,000 this week by available funds" — never the number you write in the max column.

Print it the other way around and you end up defending a bid that leaves $4,000 of profit on the table because a line of credit had not funded yet. If cash is the binding constraint, fix the cash: that is what floor plan financing for new dealers is about.

The exits that quietly break the math

Three assumptions do most of the damage. First, days to sell: a car that takes four months to move costs you the floor-plan interest and the lot space you did not budget. Second, the wholesale exit — if the retail plan fails, what does a dealer pay you? That number belongs in your worst case, and the paperwork side of it is in dealer-to-dealer wholesale in Utah. Third, the conversion cost of getting a salvage car to a rebuilt title at all, which is inspections and fees before you can retail it.

Write those three down for every car you are serious about. A max bid that only works if everything goes right is not a max bid.

Questions dealers actually ask

What percentage of retail should I pay for a salvage car?

Work in all-in cost, not hammer percentage: everything you will spend — hammer, fees, transport, parts, labor — should land at or under 60% of clean retail, and the deal should still project at least $2,000 of profit against a realistic rebuilt selling price.

How much less does a rebuilt title sell for?

Plan on about 35% below clean comps: closer to 30% when you can hand the buyer a complete folder of repair receipts and inspection paperwork, and closer to 40% when documentation is thin. Comp against rebuilt listings, not clean ones.

Should I pad my repair estimate with a multiplier?

No. Once the estimate is itemized at real parts prices and real hours, a multiplier inflates every line at once. Add the uncertainty as a plain dollar contingency sized to what the damage could be hiding.