Why car insurance goes up at renewal

The lines on an auto renewal that move the premium, and what to ask your carrier about each one.

Terms in this guide

Tap a term to read what it means.

Premium. The price of the policy for one term, usually six or twelve months. It can be paid at once or in installments. The renewal packet lists the new premium for the coming term.

Declarations page. The summary page at the front of a policy: who and what is insured, the term dates, each limit and deductible, the endorsements, and the premium. A new one comes with every renewal.

Rating territory. The area a carrier groups an address into for pricing, often by ZIP code. Claim costs in that area feed the rate, so a move across town can change the premium.

Rate filing. The rates and rules a carrier submits to a state insurance department. When a new filing takes effect, it applies to policies in that state as each one renews.

Collision deductible. The part of a collision repair you pay before the policy pays the rest. At $1,000, a $3,200 repair means you pay the first $1,000.

Bodily injury liability. What the policy pays if you injure someone else in a crash. Two numbers mean a limit per person and a limit per accident, so $100,000 / $300,000 caps one person at $100,000.

The renewal notice comes, the premium is higher, and nothing seems to have happened. No accident, no ticket, same car. That is one of the most common surprises in personal insurance, and the reason is often only partly visible on the page.

This guide walks through what goes into an auto renewal price, which reasons come from your own policy and which come from the carrier, and how to read the declarations page to see where the increase landed.

How a renewal premium is set

An auto carrier prices each policy with a rating plan: a set of rates and rules it files with the insurance department in each state where it writes policies. The plan takes in facts about the drivers, the cars, where the cars are kept, and the coverages, limits, and deductibles on the policy.

At renewal, the carrier runs your policy through its current plan again. Two things can move the result. One of your inputs changed, or the plan itself changed. Often it is a bit of both.

Reasons that start with your policy

These are the changes tied to you, your household, or your cars. Most of them leave a trace somewhere on the declarations page.

A claim or a moving violation. Rating plans usually look back several years, and the look-back period differs by carrier and state.
A driver added, or a change in a listed driver, like a teenager getting a license.
A car added or replaced, or a change in how a car is used, such as a longer commute.
A move to a new address, which can put the car in a different rating territory.
A discount that ended. A good-student discount after graduation, or a multi-policy discount after a home or renters policy moved elsewhere.
In states that allow it, a re-check of a credit-based insurance score.

Reasons that start with the carrier

Some increases start outside your file entirely. When a carrier's costs rise across a state, it files new rates, and once approved or in effect they reach each policy at its next renewal. Your neighbor with the same car may see a similar change.

What drives those filings is mostly the cost of paying claims. Repairs on newer cars, with sensors and cameras in the bumpers, cost more than they used to. Medical bills and injury settlements move over time. A territory with more crashes, thefts, or storm damage than expected can see its rates adjusted. None of this shows as a reason on your page; it shows as a higher number.

ExampleTwo cars, a twelve-month term

Line	Last term	This term
Liability premium	$520	$571
Collision premium	$388	$452
Comprehensive premium	$142	$158
Medical payments premium	$66	$70
Uninsured motorist premium	$96	$139
Total premium	$1,212	$1,390

Example numbers. Every coverage line rose, by different amounts, for a total increase of $178. A pattern like this is a good reason to ask whether a state rate change applied.

Where the increase shows on the page

Many auto declarations pages list a premium for each coverage on each car, then a total. That breakdown is the most useful part of the page when the total goes up. Put last term's page next to this term's and compare one line at a time.

If one coverage on one car moved a lot and the rest stayed put, the cause is likely tied to that car or that coverage. If every line rose by a similar share, a rate change across the state is one possible reason. Either way, it is a pattern to bring to your carrier. Check the parts of the page that are not prices too: the list of drivers, the cars and their garaging address, and the discounts section.

Questions to ask your carrier or agent

The page shows what moved. The reason is for your carrier or agent. These questions tend to get a clear answer:

Did a rate change take effect in my state, and how much of my increase came from it?
Which coverage lines changed, and by how much on each car?
Did any discount end or change this term?
Was a claim, a violation, or an insurance score used in this renewal's price?
Are the drivers, cars, and garaging address on the page correct?

Next renewal, side by side

Halfstone puts this term's declarations page next to last term's, line by line, with a plain note on each line. A changed number or a missing form is easy to see before you call. See a Renewal Review, or start free with the policy that renews next.