Harlan Guides

Motor Vehicle Accident · Valuation

Car Accident Settlement Calculator for Attorneys

Most car accident calculators on the internet are built for consumers and output a single number. That is not how case valuation works. This guide gives you an attorney-friendly framework to build a defensible settlement range, then shows how to validate it with comparables, venue signals, and policy limit guardrails.

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A decision-grade auto accident calculator is a range, not a multiplier

Multipliers can be a useful shorthand, but they break when liability is contested, treatment is still evolving, policy limits are unknown, or the venue distribution is bimodal. A better approach is: build economics, apply a liability discount, then validate with comparables and policy reality.

Step 1: Build economic damages (clean, documentable)

  • Medical specials: past bills (billed and paid if you track both) plus realistic future care scenarios.
  • Wage loss: time missed plus any documented impairment or work restrictions.
  • Property and out-of-pocket: vehicle damage, rental, mileage, and other provable expenses.

Step 2: Apply a liability-weighted range (explicit assumptions)

Instead of arguing about an abstract multiplier, write down the liability posture and apply a percentage discount. Present it as an "out of 100 trials" heuristic so it is obviously an estimate.

Example

If your base damages range is $200k to $400k and you believe the liability posture is roughly 70 out of 100 trials, the liability-weighted range is $140k to $280k. Track what would change that number (dash cam, independent witness, adverse medical history).

Step 3: Non-economic damages as scenarios (low, base, high)

For auto cases, "pain and suffering" varies most with injury severity, treatment intensity, permanency, and credibility. Build three scenarios and attach a factual trigger to each.

Low

Soft tissue, short treatment, conservative venue, gaps in care.

Base

Consistent treatment, objective findings, average venue.

High

Surgery, permanent impairment, plaintiff-friendly venue, strong liability facts.

Step 4: Validate against comparable verdicts and venue signals

The single biggest credibility upgrade is to pressure-test your range against comparable outcomes. Use comparables to answer: does this venue actually pay these numbers for this injury profile, with this liability story?

  • Match on injury type, treatment intensity, permanency, and liability posture.
  • Weight comparables by venue (county and judge patterns matter more than state averages).
  • Watch the tails: nuclear verdict risk is not the median, but it changes negotiation leverage.

Step 5: Policy limit and collectability guardrails

A case value is constrained by insurance and collectability. If limits are unknown, build a policy-limited range and make the "what we need to find" list explicit.

  • List likely coverage sources (primary, umbrella, UM/UIM, employer policies).
  • Model a "limits discovered" scenario that immediately re-ranks your settlement posture.
  • Make liens and subrogation part of the valuation narrative, not an afterthought.

Run the decision-grade version in Harlan

Harlan evaluates your case using a 20-module engine and returns a defensible range with comparable verdicts and jurisdiction signals. You can use it to sanity-check your range before demand, mediation, or intake decisions.

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Disclaimer: This guide is for informational purposes only and does not constitute legal advice. Outputs from Harlan are decision-support estimates and not guarantees.