Car Accident Settlement Formula: How an Auto Injury Payout Is Figured, Line by Line
Most car accident settlements are priced with one formula: your medical bills times a multiplier of about 1.5 to 5, plus lost income, then reduced by your share of the fault and capped by the insurance that exists. With $10,000 in bills, $3,000 in lost pay and a fracture that healed without surgery, that is $28,000 to $38,000 before fees and liens.
Enter the medical bills and lost income, pick the injury and the state.
Hurt in a car accident? See where your own numbers land, free, in about a minute.
Six lines, in order
The car accident settlement formula, in the order it is applied
Insurers and injury lawyers price most car accident claims the same way. They start from the medical bills, scale them by how serious the injury was, add the income you lost, and then put the result through three filters that have nothing to do with how much you hurt: your share of the fault, the insurance that exists to pay, and what has to be paid back out of the money. Leave out a filter and the number you expect will be wrong, usually by a lot.
- The medical number. What your treatment cost, past and expected. Depending on the state, that is the billed amount, the amount actually paid, or both.
- Times the multiplier. A factor from about 1.5 to 5 that rises with how serious and lasting the injury is. The result covers the bills and the pain together.
- Plus lost income and other costs. Missed pay, paid time off you had to use, and costs with receipts such as prescriptions and mileage to appointments.
- Less your share of the fault. Every state has its own rule, and in five jurisdictions any fault at all can end the claim.
- No more than the insurance you can reach. The other driver's bodily injury limit, plus whatever your own underinsured motorist coverage adds under your state's rules.
- Less fees, case costs and liens. What comes out of the settlement before the check reaches you.
Written as one line: value = medical bills × multiplier + lost income, reduced by your share of the fault and limited to the insurance available. Your check = the settlement, less the fee, the case costs and anything owed back to a health plan, Medicare, Medicaid or a hospital.
For scale, auto insurers paid an average of $28,278 per bodily injury liability claim in 2024, up from $26,178 in 2023, according to ISO, a Verisk business, as published by the Insurance Information Institute. The figure leaves out Massachusetts and most no fault states, and a handful of very large claims weigh on any average, so treat it as a national figure for comparison, not as a target for your own claim.
Line 1
The medical number: billed, paid, or both
The multiplier can only be as large as the number it multiplies, and that number is not always the total printed on your hospital statements. When a health plan pays a hospital, it pays a negotiated rate that is often far below the charge, and the hospital writes off the rest. States disagree about which of the two figures a claim is built on, and the gap can be most of the bill.
| State | The medical number a jury hears | Law |
|---|---|---|
| California | What you or your insurer actually paid, when the provider accepted less than its charge as payment in full | Howell v. Hamilton Meats & Provisions (2011) 52 Cal.4th 541 |
| Texas | What was actually paid or is still owed, the paid or incurred rule | Civ. Prac. & Rem. Code § 41.0105 |
| Florida | Bills already paid: the amount actually paid, from any source. Unpaid bills: what your health coverage would pay, or 120 percent of the Medicare rate if you have no coverage (170 percent of the Medicaid rate where Medicare sets none). Bills under a letter of protection that were sold: what the buyer paid or agreed to pay for them | Fla. Stat. § 768.0427, enacted in 2023 |
| Georgia | For crashes from April 21, 2025, both the billed charges and the amount your health plan's contract requires it to pay | O.C.G.A. § 51-12-1.1 (SB 68) |
Other states use the billed amount or let the jury weigh both. Ask which rule applies where the crash happened before you compare an offer with your statements.
It matters more than people expect. In the Texas example further down, $28,000 of charges were settled by insurance for $16,500. At a multiplier of 3 to 4, that difference alone is $34,500 to $46,000 of claim value, and it is the first thing an adjuster in a paid or incurred state will point to.
Future care belongs on this line too, but only with paper behind it: a treating doctor's written opinion that the care is likely to be needed and an estimate of what it will cost. A hope that you will need more therapy is not evidence. When an injury will not fully heal, the future part can outgrow everything else, which is covered in our guide to permanent injury settlement amounts.
Line 2
Lost income and the costs with receipts
Lost income is the pay you missed because of the injury and its treatment: shifts you could not work, hours that were cut, overtime you would normally have taken, and paid time off you burned on medical appointments. The usual proof is a letter from your employer stating your rate of pay and the dates you missed, with pay stubs from before the crash. If you are self employed, the proof is your tax returns for the past two or three years, because the claim is lost profit rather than lost hours, and an insurer will compare this year against those years.
Other costs you paid because of the injury go on the same line: prescriptions, braces, mileage to appointments, child care while you were in treatment, help you hired for work around the house. Keep the receipts. A cost without one is easy for an adjuster to strike.
Two things do not belong here. The damage to your car is a separate property damage claim, handled on its own and never multiplied. And pay you will lose in the future because the injury changed the work you can do is a different item, lost earning capacity, which needs its own proof. Our guide to calculating lost wages walks through the documents.
Line 3
The multiplier: how serious the injury was, as a number
The multiplier is a convention of claims negotiation, not a rule of law. No statute sets one and no jury is told to use one. It moves with what the medical records prove: how long treatment lasted, whether imaging shows the injury, whether you needed surgery, and whether a doctor says the injury will last. These are the bands from our multiplier guide, with what they do to $10,000 of medical bills.
| Injury, as the records show it | Multiplier | $10,000 of bills becomes |
|---|---|---|
| Sprain, strain or whiplash, healed within weeks | 1.5 to 2 | $15,000 to $20,000 |
| Soft tissue injury with months of therapy | 2 to 3 | $20,000 to $30,000 |
| Fracture healed without surgery | 2.5 to 3.5 | $25,000 to $35,000 |
| Herniated disc or nerve symptoms | 3 to 4 | $30,000 to $40,000 |
| Injury requiring surgery | 3.5 to 4.5 | $35,000 to $45,000 |
| Brain injury | 4 to 6 | $40,000 to $60,000 |
| Permanent disability | 5 and up | $50,000 and up, usually priced with a life care plan instead |
Read the last column carefully: it already includes the bills. A 2.5 multiplier on $10,000 means $25,000 for the bills and the pain together, not $25,000 of pain on top of the bills. Some adjusters and lawyers write the formula the other way, with the multiplier pricing the pain alone, and the same multiplier then gives a larger number. When someone quotes you a multiplier, ask which version they mean. Our pain and suffering multiplier guide works through both versions with examples.
Some claims price the pain by the day instead: a daily amount, often tied to what you earn in a day, times the days from the crash until a doctor released you. At $150 a day for 120 days, the pain is worth $18,000, added to the bills and the lost income. It fits injuries with a clear end date.
Many large insurers run the medical records through claim evaluation software before an adjuster makes an offer. It reads the same things this line depends on: the diagnosis, how long treatment lasted, gaps in care and objective findings. A claim with weeks of missed appointments tends to land at the bottom of its band. Read more about how insurers value claims with software.
Line 4
Your share of the fault, under your state's rule
If the other side can show you were partly responsible, for speeding, braking late or changing lanes without a signal, your value is reduced by your percentage of the fault. Each state then adds a rule about how much fault ends the claim altogether. The same 30 percent can cost you 30 percent of the claim in one state and all of it in another.
| Rule | At 30% fault | At 50% | At 51% | Where it applies |
|---|---|---|---|---|
| Pure comparative fault | Reduced by 30% | Reduced by 50% | Reduced by 51% | Alaska, Arizona, California, Kentucky, Louisiana, Mississippi, Missouri, New Mexico, New York, Rhode Island, Washington |
| 51 percent bar | Reduced by 30% | Reduced by 50% | Nothing | Connecticut, Delaware, Florida, Hawaii, Illinois, Indiana, Iowa, Massachusetts, Michigan, Minnesota, Montana, Nevada, New Hampshire, New Jersey, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Vermont, West Virginia, Wisconsin, Wyoming |
| 50 percent bar | Reduced by 30% | Nothing | Nothing | Arkansas, Colorado, Georgia, Idaho, Kansas, Maine, Nebraska, North Dakota, Oklahoma, Tennessee, Utah |
| Contributory negligence | Nothing | Nothing | Nothing | Alabama, District of Columbia, Maryland, North Carolina, Virginia |
| Slight negligence | Reduced by 30%, only if a jury calls it slight | Only if slight | Only if slight | South Dakota, where your negligence must be slight next to the other driver's, with no fixed percentage (SDCL 20-9-2) |
Two changes many older lists miss. Florida moved from pure comparative fault to the 51 percent bar for negligence lawsuits filed from March 24, 2023, except medical negligence cases (Fla. Stat. § 768.81(6), enacted by HB 837). West Virginia bars a plaintiff only when that person's fault is greater than the combined fault of everyone else, so a driver found exactly 50 percent at fault still recovers half (W. Va. Code § 55-7-13c).
Fault is negotiated like every other line. Police reports, photos of the damage, dashcam video and witness statements decide where the percentage lands, and the adjuster's first number is an opening position. A ten point swing moves the claim by ten percent of its value: $6,000 on a $60,000 claim. In the 50 and 51 percent states, the arguments near the line decide whether there is a claim at all.
Line 5
The insurance you can reach caps everything above it
The formula produces a value; insurance decides how much of it can be collected. The other driver's bodily injury liability limit is the most their insurer will pay any one injured person, however high the formula runs, and many drivers carry only what their state requires.
| State | Minimum bodily injury limit, per person | Per crash |
|---|---|---|
| Pennsylvania, Louisiana | $15,000 | $30,000 |
| Arizona, Georgia, Illinois, Ohio, Tennessee | $25,000 | $50,000 |
| New York | $25,000 ($50,000 for a death) | $50,000 ($100,000 for deaths) |
| Texas | $30,000 | $60,000 |
| California, since January 1, 2025 ($15,000 before) | $30,000 | $60,000 |
| North Carolina, policies from July 1, 2025 | $50,000 | $100,000 |
| Florida | None required of most drivers | $10,000 of PIP and $10,000 of property damage are required |
Insurance Information Institute table of financial responsibility limits by state (July 2024), with California's SB 1107 and North Carolina's 2025 increase.
When your value is above their limit, money can still come from three places: your own underinsured motorist coverage, a second policy that covers the other driver (an umbrella policy, or an employer's policy when they were working), and anyone else who shares the blame, such as the owner of the vehicle. How underinsured coverage adds up depends on the state. In Texas and Tennessee it is reduced by what the other insurer pays, so it fills only the gap up to your own limit (Tex. Ins. Code § 1952.106; Tenn. Code Ann. § 56-7-1201). In Georgia, since 2009 the default coverage pays on top of the other driver's limit unless you chose the reduced kind in writing (O.C.G.A. § 33-7-11).
The same two policies, two answers. With $30,000 of liability coverage on their side and $50,000 of underinsured coverage on yours, the most you can reach in Texas is $50,000. Under Georgia's added on default, the same two limits reach $80,000.
A limit can also work in your favor. In Texas, an insurer that turns down a reasonable demand to settle within its policy limit can be held responsible for the whole judgment that follows, the Stowers doctrine (G.A. Stowers Furniture Co. v. American Indemnity Co., 1929). Other states have their own bad faith rules, which is why a time limited demand to settle for the policy limit is a common step when a claim is worth more than the policy.
Before line 1, in 12 states
No fault states add a gate in front of the formula
In Florida, Hawaii, Kansas, Kentucky, Massachusetts, Michigan, Minnesota, New Jersey, New York, North Dakota, Pennsylvania and Utah, your own personal injury protection coverage pays your first medical bills and part of your lost income, whoever caused the crash. In exchange, a claim against the other driver for pain and suffering is allowed only past a threshold: a dollar amount of medical expenses in some states, a serious or permanent injury in others. In New Jersey and Pennsylvania the threshold binds only drivers who chose the limited right to sue on their own policy.
Florida shows how tight the gate can be. Its PIP pays 80 percent of reasonable medical expenses and 60 percent of lost gross income, up to $10,000 combined, and reimbursement is limited to $2,500 when a listed provider finds no emergency medical condition (Fla. Stat. § 627.736). Florida has no dollar threshold at all. Pain and suffering is available only for a significant and permanent loss of an important bodily function, a permanent injury within a reasonable degree of medical probability, significant and permanent scarring or disfigurement, or death (§ 627.737(2)). Anything PIP paid cannot be collected a second time from the other driver (§ 627.736(3)).
So in a no fault state, check the gate before you run the formula. The thresholds for all twelve states, side by side, are in our guide to permanent injury settlement amounts.
Line 6
From settlement to check: fees, costs and money owed back
The settlement figure is not the amount you receive. Several parties have a claim on it, in roughly this order.
| What comes out | How much | The rule behind it |
|---|---|---|
| Attorney fee | Commonly about one third, and many contracts step up if a lawsuit is filed | Your fee contract; Michigan caps injury case fees at one third of the recovery (MCR 8.121) |
| Case costs | Records, filing fees, expert reports, depositions | Repaid from the settlement under most fee contracts |
| Health plan reimbursement | What the plan paid for crash care, sometimes reduced by agreement | The plan's terms; a self funded employer plan can enforce its reimbursement terms as written (US Airways v. McCutchen, 2013) |
| Medicare | Conditional payments it made for crash care | Must be repaid from the settlement (42 U.S.C. § 1395y(b)(2)) |
| Medicaid | Only from the part of the settlement that pays for medical care | Arkansas Dept. of Health and Human Services v. Ahlborn (2006) |
| Hospital and provider liens | Unpaid bills, including care given under a letter of protection | State lien laws and your agreements with providers |
| Income tax | None on damages for a physical injury; interest and punitive damages are taxable | 26 U.S.C. § 104(a)(2) |
One tax detail catches people: emotional distress on its own does not count as a physical injury, apart from what was spent treating it (26 U.S.C. § 104(a)). For how these deductions play out at different settlement sizes, see how much of a settlement you actually keep, and for negotiating what a health plan or hospital takes, our guide to subrogation and medical liens.
Worked through
Three claims, run through the whole formula
An emergency room visit and six weeks of physical therapy, $6,800 in charges. Eight missed workdays, about $1,500 of pay. No fault on her side, and the other driver carries Georgia's $25,000 minimum.
- Medical number
- $6,800
- Times 1.5 to 2, healed within weeks
- $10,200 to $13,600
- Lost income
- + $1,500
- Her fault
- none
- Value by the formula
- $11,700 to $15,100
The whole range fits under the $25,000 limit, so insurance is not the problem here; the deductions are. Suppose it settles at $13,500. A one third fee is $4,500, case costs are $250, and her health plan asks for the $3,900 it paid toward her care: $4,850 reaches her. If the plan agrees to cut its claim by a third to share the cost of the fee that recovered its money, she keeps $6,150.
Injections for a herniated disc in the lower back. The charges were $28,000, but her health plan's negotiated payments plus what she still owes come to $16,500. Six weeks off work cost $6,000. The other side says she was speeding and assigns her 30 percent of the fault. The other driver carries the Texas minimum of $30,000.
- Medical number, paid or incurred
- $16,500
- Times 3 to 4, herniated disc
- $49,500 to $66,000
- Lost income
- + $6,000
- Value before fault
- $55,500 to $72,000
- Less her 30% share
- $38,850 to $50,400
- Collectible from their policy
- $30,000
Two lessons in one claim. Built on the billed $28,000, the same claim would have run $90,000 to $118,000 before fault, which is why Texas offers start from the paid figure. And the whole range sits above the $30,000 limit, so the real question is her own underinsured motorist coverage, which in Texas pays only the part of her damages above $30,000, up to her own limit.
A broken wrist repaired with a plate and screws: $34,000 in medical bills and ten weeks off work worth $9,000. A witness says he entered on a late yellow light, so the insurer gives him 20 percent of the fault. The other driver carries $25,000; he carries $100,000 of underinsured motorist coverage.
- Medical number
- $34,000
- Times 3.5 to 4.5, surgery
- $119,000 to $153,000
- Lost income
- + $9,000
- Value before fault
- $128,000 to $162,000
- Less his 20% share, pure comparative
- $102,400 to $129,600
Arizona's pure comparative rule means his 20 percent only reduces the claim. Between the $25,000 policy and his own $100,000 of underinsured coverage, at least $100,000 is collectible, and up to $125,000 if his coverage pays on top of theirs rather than being reduced by it. Say the two claims settle for $100,000 in total. A one third fee of $33,333, $1,800 in case costs and a $12,400 reimbursement claim from his health plan leave him about $52,467.
Hypothetical claims built to show each line of the formula. Bands from our multiplier guide; fault rules, policy minimums and coverage rules from the statutes named on this page.
Same bills, different offers
Why two claims with the same bills get different offers
Two people with $10,000 of medical bills can be offered very different amounts, and the formula explains most of the gap. These are the differences that move a claim from one end of its band to the other.
A first visit days after the crash, or a month without appointments in the middle of treatment, lets an insurer argue the injury was minor or came from something else.
A fracture on an X-ray, a herniation on an MRI or an abnormal nerve test supports a higher band than pain reported in the patient's own words, however real the pain is.
A note about work restrictions, future care or a permanent condition adds lines to the claim that a file without one never gets.
Insurers weigh the county as well as the injury, because juries in some places award more than in others, and the fault rule and the medical evidence rule depend on the state.
When an offer arrives, check it line by line: which medical number it uses, which multiplier and which version of the formula, what share of the fault it assigns you, and whether it is capped by a policy limit you have not seen in writing. An offer that cannot explain itself line by line is usually a starting bid. Our guide to lowball settlement offers covers how to answer one.
Questions people in the United States ask
Car accident settlement formula questions
What is the formula for a car accident settlement?
Most claims are priced as medical bills times a multiplier of about 1.5 to 5, plus lost income and other costs. That value is then reduced by your share of the fault under your state's rule and limited by the insurance available, and the fee, case costs and liens come out before you are paid. With $10,000 in bills, $3,000 in lost pay and a 2.5 to 3.5 multiplier, the value is $28,000 to $38,000.
How is a personal injury settlement calculated?
From the damages you can prove. Economic damages are the medical bills, lost income and other costs with receipts. Pain and suffering is usually priced by tying it to the medical bills with a multiplier, or by a daily rate times the days of recovery. The total is then adjusted for fault, insurance limits and anything owed back to a health plan or Medicare.
What multiplier do insurance companies use?
There is no official multiplier. Ranges commonly used in negotiation run from about 1.5 to 2 for a sprain that healed within weeks, 2.5 to 3.5 for a fracture that healed without surgery, 3.5 to 4.5 after surgery and 4 to 6 for a brain injury. Where a claim lands inside its range depends on what the medical records prove.
Does the multiplier apply to lost wages?
Usually not. The common practice is to multiply the medical bills and then add lost income at its actual amount. Some people apply the multiplier to bills and wages together, which produces a larger number, so ask which method an offer uses.
Is a settlement based on the billed medical amount or what insurance paid?
It depends on the state. California and Texas build the claim on what was actually paid or is still owed (Howell, 2011; Texas Civil Practice and Remedies Code § 41.0105). Florida uses amounts paid and, for unpaid bills, what coverage would pay or 120 percent of the Medicare rate (Fla. Stat. § 768.0427). Georgia juries hear both figures for crashes from April 21, 2025. Other states use the billed amount or let the jury weigh both.
How does my share of the fault change the settlement?
Your value is reduced by your percentage of the fault. In the 11 pure comparative states that is the only effect. In 23 states fault above 50 percent ends the claim, in 11 states fault of 50 percent or more ends it, and in Alabama, the District of Columbia, Maryland, North Carolina and Virginia any fault can end it. South Dakota allows recovery only if your fault was slight.
Can a settlement be more than the other driver's policy limit?
Their insurer rarely pays more than the limit; one exception is a Texas insurer that unreasonably turned down a demand to settle within it. More money usually comes from your own underinsured motorist coverage, an umbrella or employer policy, or another party who shares the blame.
How much of a settlement goes to the lawyer?
Injury lawyers usually work on a contingency fee of about one third, and many contracts raise it if a lawsuit is filed. Michigan caps injury case fees at one third by court rule (MCR 8.121). Case costs and any health plan, Medicare, Medicaid or hospital claims are also paid from the settlement.
Is a car accident settlement taxable?
Damages received for a physical injury are not taxable income under 26 U.S.C. § 104(a)(2), whether paid as a lump sum or over time. Interest and punitive damages are taxable, and emotional distress on its own does not count as a physical injury apart from the cost of treating it.
What is the per diem method?
A way to price pain and suffering by the day: a daily amount, often tied to a day's pay, times the days from the crash until a doctor released you. At $150 a day for 120 days, that is $18,000, added to the bills and lost income.
Where every number comes from
Sources
- Insurance Information Institute, Facts and Statistics: Auto Insurance, private passenger auto losses 2015 to 2024 (bodily injury claim severity $26,178 in 2023 and $28,278 in 2024; source: ISO, a Verisk Analytics business). www.iii.org
- Insurance Information Institute, Automobile Financial Responsibility Limits and Enforcement by State, as of July 2024. www.iii.org
- California SB 1107 (2024), minimum liability limits of 30/60/15 for policies from January 1, 2025. leginfo.legislature.ca.gov
- North Carolina Advocates for Justice, auto insurance law updates effective July 1, 2025, including 50/100/50 minimum limits. ncaj.com
- Howell v. Hamilton Meats & Provisions, Inc. (2011) 52 Cal.4th 541: past medical damages limited to the amounts paid when the provider accepted less than its charges. scocal.stanford.edu
- Tex. Civ. Prac. & Rem. Code § 41.0105, recovery of medical expenses limited to the amount actually paid or incurred. codes.findlaw.com
- Fla. Stat. § 768.0427 (2023), admissible evidence of medical expenses: amounts paid, 120 percent of the Medicare rate, letters of protection. http:
- Georgia SB 68 (2025), tort reform signed April 21, 2025, including O.C.G.A. § 51-12-1.1 on evidence of medical expenses. billtracker.gacities.com
- Fla. Stat. § 768.81(6), a party found more than 50 percent at fault for its own harm may not recover (ch. 2023-15). http:
- Florida Senate, bill summary of HB 837 (2023): effective March 24, 2023; modified comparative negligence; negligence limitations period cut from four years to two. www.flsenate.gov
- W. Va. Code § 55-7-13c, the plaintiff's fault bars recovery only if it is greater than the combined fault of all other persons. codes.findlaw.com
- S.D. Codified Laws § 20-9-2, contributory negligence that is slight in comparison with the defendant's does not bar recovery. sdlegislature.gov
- Tex. Ins. Code § 1952.106, underinsured motorist coverage reduced by the amount recovered from the other insurer. codes.findlaw.com
- Tenn. Code Ann. § 56-7-1201, uninsured motorist coverage: the limit less amounts collectible. codes.findlaw.com
- O.C.G.A. § 33-7-11, uninsured motorist coverage: added on and reduced by coverage. codes.findlaw.com
- G.A. Stowers Furniture Co. v. American Indemnity Co., 15 S.W.2d 544 (Tex. Comm'n App. 1929), the insurer's duty to accept a reasonable demand within limits. www.thompsoncoe.com
- Fla. Stat. § 627.736, personal injury protection: 80 percent of medical expenses, 60 percent of lost income, $10,000 limit, $2,500 without an emergency medical condition, no recovery of benefits paid or payable. http:
- Fla. Stat. § 627.737(2), the tort threshold for pain and suffering. http:
- Michigan Court Rule 8.121, contingent fees in personal injury cases capped at one third of the amount recovered. www.courtrules.net
- US Airways, Inc. v. McCutchen, 569 U.S. 88 (2013), reimbursement terms of an ERISA plan. supreme.justia.com
- Arkansas Dept. of Health and Human Services v. Ahlborn, 547 U.S. 268 (2006), Medicaid recovery limited to the medical expense part of a settlement. supreme.justia.com
- 42 U.S.C. § 1395y(b)(2), Medicare as secondary payer and repayment of conditional payments. www.law.cornell.edu
- 26 U.S.C. § 104(a)(2), damages received on account of personal physical injuries excluded from gross income. www.law.cornell.edu
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