Insurance Premium Increase Calculator: Percentage Change in Your Premium
Work out the percentage increase in your insurance premium between two terms — and the dollar difference — so you can see how much your auto, home, or health premium has risen and decide whether it's time to shop around.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Premium increase | Dollar change |
|---|---|---|
| $1,400 to $1,610 (+15%) | 15.00% | 210 |
| $900 to $1,170 (+30%, big jump) | 30.00% | 270 |
| $2,200 to $2,288 (+4%) | 4.00% | 88 |
| $1,500 to $1,350 (−10%, switched) | -10.00% | -150 |
How This Calculator Works
Enter your previous premium and your new premium for the same period (both annual, or both per term). The calculator finds the percentage change between them and the dollar difference at renewal.
The Formula
Percentage Change
Old is the starting value, New is the ending value
Worked Example
A premium rising from $1,400 to $1,610 is a 15% increase — $210 more a year. Premiums climb for many reasons: industry-wide rate increases (filed and approved by regulators), claims in your area or on your policy, a changed credit-based insurance score, added coverage, or the loss of a discount. A double-digit jump with no claims on your part is the classic signal to shop competitors at renewal — loyalty rarely pays in insurance.
Key Insight
Insurance premiums are one of the most shoppable recurring expenses, yet inertia keeps most people overpaying. A renewal increase isn't a fixed cost — it's an offer you can counter. When you see a jump, do three things: ask your insurer specifically why it rose (a surprising amount is industry-wide rate filings, not anything you did), get quotes from competitors for identical coverage, and check whether bundling, raising deductibles, or restoring a lapsed discount lowers it. Insurers often price renewals higher than new-customer quotes, betting on inertia — so the same coverage from a competitor, or even a re-quote from your own insurer, can undo the increase. Just compare identical coverage limits and deductibles, since a cheaper premium with thinner coverage isn't really cheaper.
Frequently Asked Questions
How is the premium increase calculated?
Subtract the old premium from the new premium, divide by the old premium, and multiply by 100. From $1,400 to $1,610 is ($1,610 − $1,400) / $1,400 = 15%, a $210 increase.
Why did my insurance premium go up?
Common causes include industry-wide rate increases approved by regulators, claims in your area or on your policy, a change in your credit-based insurance score, added coverage or drivers, or the loss of a discount. Ask your insurer for the specific reason — much of it is often broad rate filings, not anything you did.
Should I shop around after an increase?
Usually yes, especially for a double-digit jump with no claims on your part. Insurers often price renewals higher than new-customer quotes, betting on inertia. Get quotes for identical coverage from competitors — and from your own insurer — to see whether you can undo the increase.
How can I lower my premium?
Compare identical coverage across insurers, ask about bundling policies, raise your deductible if you can absorb it, restore any lapsed discounts (safe driver, paperless, loyalty), and improve your credit-based insurance score where applicable. Re-quoting at renewal is the single highest-impact step.
Is a cheaper premium always better?
Not if it comes with thinner coverage. A lower premium achieved by cutting limits or raising deductibles shifts risk back to you. When comparing, match coverage limits and deductibles exactly — only then is the premium difference a true apples-to-apples saving.
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Methodology & Review
The increase is the change between the old and new premium divided by the old premium, multiplied by 100. It compares two premium amounts directly and does not separate the causes (rate filing, claims, coverage changes) behind the increase.
Written by Ugo Candido · Last updated May 22, 2026.