Car Insurance Refund Calculator

How it works

A car insurance company does not earn your premium the day you hand it over. It earns that car insurance premium a day at a time, across the term, in exchange for carrying the risk on your car.

Cancel halfway through and the days you paid for but never used are still yours. That unused share is called the unearned premium, and every car insurance refund comes out of it. What you receive is that amount, minus a short-rate penalty if your car insurance policy charges one:

• premium, the total you paid up front for the term
• term, the length of the policy in months
• unused, the months left, term minus the months you used
• short-rate %, the share of the unearned premium the insurance company keeps, 0 for a pro-rata cancellation

Nothing about your coverage changes that math. A high deductible, low liability limits, an expensive vehicle: those set the cost of the car insurance you bought, not the share that comes back to you.

Your deductible and the vehicle named on the car insurance policy matter at claim time, not on the day you cancel.

With the defaults above, you paid $1,320 for six months of car insurance and used 2.5 of them. The insurance company has earned $550, so the remaining 3.5 months, worth $770, are unearned.

Cancel pro-rata and that whole $770 comes back. Switch to a 10% short-rate cancellation and the car insurance company keeps $77 of it, leaving $693.

✓ Every result is checked against independent reference math. See how we test the calculators →

How to use this calculator

1. Enter the total car insurance premium you paid up front for the term, not your monthly payment.
2. Set the term to the length of the insurance policy in months, usually 6 or 12.
3. Enter the months you have already used, counting to the cancellation date rather than today.
4. Set the short-rate percentage to whatever your cancellation clause names, or leave it at 0 for a pro-rata refund.
5. Read off the refund the calculator shows, then compare it with the figure your car insurance company quotes and query any gap.

A worked example: cancelling a $1,320 six-month policy

Say you paid $1,320 up front for a six-month car insurance policy, then sold the car two and a half months in. That leaves 3.5 months you paid for and will never use. Cancel pro-rata and your refund is $770.

The split is straightforward. Of the $1,320 you handed over, the insurer has earned $550 for the two and a half months it actually carried your risk. The other $770 is unearned premium, money sitting against days that will now never happen, and pro-rata means every cent of it comes back to you.

Now suppose your policy cancels short-rate instead, which is common when you are the one walking away. A 10% short-rate penalty holds back $77 of the unearned premium, and the refund drops to $693. The insurer keeps that slice to recover what it cost to write a policy you did not keep.

It is not a huge sum here, but it is the entire difference between the two methods, and your policy’s cancellation clause decides which one applies to you. Enter your own premium, term, and months used above to see where you land.

Pro-rata or short-rate: which one applies to you?

Every car insurance refund starts from the same unearned premium. What happens to it next depends on which of two methods your car insurance policy names, and those two methods can leave you with very different amounts.

• Pro-rata. You get back exactly the unused share, to the day, with nothing held back. This is what you get when the car insurance company cancels you, and when your state's rules or the insurance policy wording require a pro-rata refund.
• Short-rate. The insurance company keeps an extra share of the unearned premium before refunding the rest. That method usually applies when you are the one cancelling early.

A flat cancellation fee can sit on top of either method, and that fee is charged separately from the short-rate share.

Short-rate is not a punishment, even though it feels like one. Writing a car insurance policy carries a real cost in commission, underwriting and administration.

The insurance company priced those costs across the full term you agreed to. Cancel at month two of six and it never earns them back.

Your car insurance company is a corporation recovering what it spent, not a bank holding your money for you. So read the cancellation clause in your own insurance policy before you assume the pro-rata figure is yours. The NAIC lists every state insurance department if the wording is unclear.

What the estimator shows for a mid-term cancellation

Take the defaults again: a $1,320 car insurance policy, six months long, cancelled at 2.5 months. The estimator puts the unearned premium at $770, and a 10% short-rate cancellation leaves $693.

That $77 difference is the price of the method, not the cost of cancelling. Change the short-rate figure in the estimator to match your own cancellation clause and the car insurance refund moves with it. Leave it at 0 and what the estimator shows is the full pro-rata refund.

The estimator does not know your insurance company's cancellation fee, so take that fee off whatever the calculator shows.

One mistake costs more than the penalty does. Stop paying instead of cancelling in writing and no refund is issued at all, because the insurance policy lapses rather than closes. A grace period buys a few days at most, and it never turns a missed payment into a proper cancellation.

How do you cancel car insurance without hurting your next quote?

How you cancel matters more than the refund does, because cancelling car insurance the wrong way costs you for years afterward.

• Never cancel by simply not paying. The insurance policy does not end, it lapses, and insurers price a gap in coverage into every car insurance quote you get afterward.
• Cancel in writing, to the insurance company or your agent, with a specific effective date. Name the date and ask for written confirmation, or you may be billed for a month you thought you had ended.
• Never cancel the old policy before the new one is in force. Set the new start date first, then end the old car insurance policy on that same day.

That last point is the one people get wrong. Even a single day between two policies counts as a lapse, and insurers share that data, so the gap shows up at the next car insurance company too. Overlapping by a day costs you a rounding error.

Cancel cleanly and your record is untouched. Underwriting still prices your car insurance on the usual factors, starting with your driving record and the vehicle itself.

Your driving history carries more weight than anything else on the file. Years of claim-free driving hold the cost down even after you move to a new insurance company, while a recent at-fault claim on your driving record follows you the same way.

Most states also allow your credit score to affect the car insurance rate, so a thin credit score file can cost you at the quote stage. In some states a weak credit score outweighs a clean driving record.

A few limit the use of gender in pricing, and some bar any rating tied to gender identity. Where gender is still permitted, it sits alongside the rest of your record rather than replacing it.

Any new car insurance company will tell you which of these factors it actually rates on, so ask about the credit score and gender rules in your state before you commit to a quote.

Why is your car insurance refund smaller than you expected?

The math above assumes you handed over the whole term's premium at the start. Plenty of drivers have not, and a few other things trim the car insurance refund besides.

• You paid monthly. Each payment covered the insurance you were about to use, so on cancellation day there is little unearned premium sitting there to return.
• A flat cancellation fee. Some insurance companies charge one, and that fee comes out of the refund before the money reaches you. The calculator does not know your fee, so subtract it yourself.
• You took a premium finance loan. When the finance company paid the car insurance cost for you, the refund goes to that finance company first, and only what is left over reaches you. A premium finance loan can carry its own settlement fee as well.

Where the money lands is worth checking too. An insurance refund normally goes back the way it came. That means the credit card you paid with or whatever bank data is on file, not a cheque in the post.

Rules vary by state as well, and they differ between car insurance and homeowners insurance. Some restrict short-rate cancellation on personal auto, some cap the penalty, and most require a pro-rata refund whenever the insurance company cancels. Before you switch, adding up what a full year of premiums costs tells you whether the move is worth the paperwork.

What a lease, a car loan or rideshare driving changes

Your car insurance is not always yours alone to cancel. Lenders on a car loan and the company behind a lease are both named on the car insurance policy for that vehicle.

Each one requires collision and comprehensive cover on the vehicle itself, not just liability. Cancel with nothing to replace it and they can buy car insurance for you, called force-placed coverage, at a cost you would not choose.

A lease is the stricter of the two. Lease contracts usually set minimum liability limits in writing, and the lease company checks that the vehicle stays covered for the whole term. Ending a lease early does not end the car insurance on its own.

Lenders and lease companies are told when cover ends, so send yours the new insurance policy details before the old one closes.

Selling the vehicle is the cleanest case. Cancel effective the day the title on the vehicle transfers, keep the bill of sale, and the unearned premium comes back under the pro-rata or short-rate method your car insurance policy names. Some states want the license plates surrendered to the DMV first, and cancelling ahead of that step leaves you with a registration problem instead of a refund.

A trade-in usually works differently, because the replacement vehicle joins the existing car insurance policy instead of ending it.

Driving for a ridesharing company changes the question again. A personal car insurance policy often excludes paid driving, so what a ridesharing company driver needs is an endorsement, not a cancellation.

Delivery driving sits in the same place. Cancel the insurance because it does not cover that driving and you are left with no cover at all.

The same goes for dropping rental car reimbursement or a roadside add-on, since removing one item lowers the premium while the insurance policy stays in force. Rental car cover is easy to add back later.

Cutting cover is the other way people lower a car insurance bill, and it needs more care than a refund does. Raising your deductible trades a lower premium for a bigger bill at claim time.

Pick a deductible you could pay out of savings, and it is worth knowing where that trade breaks even. A deductible you cannot cover turns a small claim into a real problem.

Trimming liability limits is riskier still. Those liability limits are what covers a property damage claim before your own assets are at risk, so protect your assets and cut somewhere else. Uninsured motorist cover is the other line worth keeping, because it is what pays when the driver who hits you carries no insurance at all.

A judgment above your liability limit reaches the assets you own outright, and no cover bought later protects assets against a claim already made. Your car insurance liability limit is the last thing standing between a claim and those assets.