Look at a liability line on an auto insurance policy and you will usually see three numbers separated by slashes, something like 50/100/50. These are not one figure split into pieces. They are three separate dollar caps, each doing a different job, each measured in thousands. Understanding what each number covers is the difference between reading your policy and just filing it in a drawer.
Why liability coverage is written as three numbers, not one
Liability coverage is the part of an auto policy that pays for damage or injury you cause to other people when you are at fault in an accident. It does not pay for your own injuries or your own car. Because a single accident can hurt more than one person and also damage property, insurers split the payout into categories instead of offering one lump sum for everything.
If liability coverage were a single number, an insurer would have no way to signal how much protects one injured person versus how much protects a whole carful of injured people versus how much replaces a fence or another vehicle. Splitting the limit lets the policy answer three different questions at once: how much per injured person, how much total for injuries in one accident, and how much for property. Each number is its own ceiling. Money left over in one category cannot be borrowed to cover a shortfall in another.
The format is usually written as three numbers in thousands, separated by slashes: 50/100/50, 100/300/100, 25/50/25, and so on. Once you know what each position means, you can read any split limit on any quote, from any insurer, without help.
Reading the order left to right
The order is always the same: per-person injury limit, then per-accident injury limit, then property damage limit. So in 50/100/50, the first 50 and the second 100 are both about bodily injury, and the last 50 is about property damage. The two injury numbers work together as a pair. The property number stands alone. Some policies show this as three separate lines with labels instead of a slash format, but the underlying structure does not change.
The first number: per-person injury limit
The first number is the most an insurer will pay for the injuries of any one person hurt in an accident you caused. In a 50/100/50 policy, that number is 50, meaning 50,000 dollars. If you are found at fault for an accident and one other person is injured, their medical bills, lost income tied to the injury, and related claims are paid out of this coverage, up to that per-person ceiling.
This limit applies individually to each injured person, not divided among them. If two people were hurt and each had claims that would total 40,000 dollars, the per-person limit of 50,000 would cover each of them in full, at least as far as that individual limit goes. The per-person number is a ceiling on any one person’s claim, not a shared pool split evenly across everyone involved.
Where this number matters most is a serious injury to a single person: a broken bone requiring surgery, an extended hospital stay, ongoing treatment. Costs like these can climb quickly, and if a claim exceeds the per-person limit, the insurer generally does not pay more than that number for that person, regardless of how large the actual bills turn out to be. What happens to costs beyond the limit is a separate question involving the at-fault driver’s own finances and any other coverage in play, not something the liability policy itself will absorb.
The second number: per-accident injury limit
The second number is the combined cap for all injury claims from one accident, no matter how many people are hurt. In 50/100/50, that number is 100, meaning 100,000 dollars total for injuries, spread across everyone involved in that single accident.
This is where the two injury numbers interact. The per-person limit caps what any one person can receive; the per-accident limit caps the total for the whole group. If three people are injured in an accident and each of their claims would be 40,000 dollars under the per-person limit, the math changes once you add them together: 40,000 times three is 120,000, which is more than the 100,000 per-accident cap. In that situation, the per-accident number becomes the binding limit, and the way the total gets divided among the injured people is handled according to the claim, not simply split evenly by the policyholder.
A useful way to think about it: the per-person number protects against one person’s bills being catastrophic, and the per-accident number protects against a lot of people being hurt in one crash, like a multi-car pileup or a vehicle full of passengers. Both numbers matter, and they cannot be swapped for each other. A high per-person limit paired with a low per-accident limit still leaves a real gap if several people are hurt at once, and vice versa.
Why the two numbers are usually proportional
You will notice that in most split-limit combinations, the second number is roughly double the first — 50/100, 100/300, 25/50. This is a common pattern in how insurers structure these pairs, reflecting the idea that a single accident with multiple injured people generally costs more in total than one person’s claim alone, but not simply some arbitrary multiple. It is a convention in how limits are packaged, not a rule that must hold in every case, and it is worth checking the exact pairing on your own policy rather than assuming it follows the usual pattern.
The third number: property damage limit
The third number is separate from the first two entirely. It covers damage you cause to someone else’s property, most commonly another person’s vehicle, but it can also include things like a fence, a mailbox, a storefront, or a utility pole, depending on what was damaged in the accident. In 50/100/50, that number is 50, meaning 50,000 dollars.
Property damage liability does not touch the injury limits, and injury liability does not touch the property damage limit. These are three separate buckets. An accident with no injuries at all, just damage to another car, draws only on the property damage number. An accident with serious injuries but only minor cosmetic damage to another vehicle draws mostly on the injury numbers and barely touches the property number. The three limits do not transfer into each other, so a low property damage limit is not offset by having high injury limits, and the reverse is also true.
Property damage claims are usually more straightforward to estimate than injury claims, since a damaged vehicle or structure has a repair or replacement cost that can be assessed relatively quickly, compared to injury claims that can develop or change as treatment continues. That does not make the property damage limit unimportant. A newer vehicle, a commercial vehicle, or damage to a building can add up past a low property damage limit faster than many drivers expect.
Putting the three numbers together
Take a policy written as 100/300/100. Read left to right: 100,000 dollars for any one injured person, 300,000 dollars total for all injuries in one accident, and 100,000 dollars for property damage. Now take 25/50/25: 25,000 dollars per injured person, 50,000 dollars total for injuries in that accident, and 25,000 dollars for property damage. The structure never changes. Only the dollar amounts do.
Some states allow, or insurers offer, what is called a combined single limit instead of split limits. A combined single limit is one number that applies to the total of injury and property damage claims together in an accident, without separating them into categories. That is a different structure from the split-limit format this article is describing, and a policy will typically show one or the other, not both. If you see one number instead of three on a liability line, check whether it is labeled as a combined single limit rather than assuming it works the same way as a split limit.
It is worth sitting with your own declarations page, the summary document that lists your coverage and limits, and finding this exact line. Insurers label it in slightly different ways — some call it “bodily injury liability” and “property damage liability” as two separate line items with three numbers between them, others use the slash format directly. Either way, the three numbers and their order are consistent across companies, because they reflect a standard structure used across the auto insurance industry rather than something any one insurer invented.
What these numbers do not tell you
Split limits describe the most your liability coverage will pay in each category. They do not describe what you are entitled to if you are the one injured by another driver — that depends on the other driver’s coverage, your own policy’s other coverages, and the details of the claim, not on the numbers explained here. They also are not a promise that every claim will reach the limit; many accidents result in costs well below any of the three numbers. And they say nothing about your own vehicle’s repair costs after an at-fault accident — that is handled by collision coverage, a separate part of the policy, not by liability limits at all.
If you are comparing quotes and see different split-limit combinations offered at different price points, the numbers themselves are the plainest way to compare what is actually being offered. A quote with 25/50/25 and a quote with 100/300/100 are not the same product wearing different price tags — they cap payouts at very different points, and that difference is exactly what the three numbers are there to show you.