Insurance Premium Increase Calculator
Your premium, the renewal, and the two levers
Your result will appear here
Fill in the fields on the left and this updates as you type.
Know what this estimate is based on
- Jurisdiction
- General mathematical model
- Scope and limitations
- Educational estimate only. Confirm the assumptions, current rules, fees, and rounding that apply to your situation before making a decision.
- Source links checked
- Jul 30, 2026
Built and regression-tested by Smart Tools Lab. It has not been individually reviewed by a licensed financial, tax, or legal professional.
How to use
- 01
Enter what the expiring policy costs a year and the renewal premium on your notice. For a policy billed every six months, double the six-month premium.
- 02
Enter how much you assume the premium will keep rising each year after this renewal, and the number of years to price it over. Try a low and a high figure, because no source can forecast your own premium.
- 03
Ask your insurer for the premium with a higher deductible. Enter the discount as a percentage and how much higher the deductible would be in dollars.
- 04
Enter the claims a year you expect that would cost more than the higher deductible, and a competing quote for the same coverage if you have one.
- 05
Read what the renewal costs over the period, then what each lever saves, and the year-by-year table of all four paths.
Formula
Premium in year y at the renewal price = renewal premium × (1 + yearly rise) raised to the power (y − 1). What the renewal costs over the period = the sum of those premiums − current premium × years. It splits into the renewal's jump, (renewal − current) × years, and the rises after it, the sum − renewal × years. Higher deductible, each year = the renewal-path premium × (1 − discount) + claims a year × the extra deductible; its net saving is the renewal-path total minus the total of those. It stops paying when claims a year exceed renewal premium × discount ÷ extra deductible. The competing quote rises at the same yearly rate from its own starting price. Both levers together apply the discount to the cheaper of the renewal and the quote, and add the same expected claims.
Example
A policy that cost $2,400 renews at $2,880, a 20% increase or $40 a month, and is assumed to rise 5% a year after that. Over five years the premiums are $2,880, $3,024, $3,175, $3,334 and $3,501, a total of $15,914 against $12,000 had the price held at $2,400, so the renewal costs $3,914: $2,400 from the jump and $1,514 from the later rises. The insurer quotes a 10% discount for a deductible $500 higher. At 0.08 claims a year that saves $1,591 of premium against $200 of expected extra out of pocket, a net $1,391, and it would stop paying above 0.58 claims a year. A competing quote of $2,550 saves $1,823 over five years. Both levers together save $3,032, 77% of what the increase costs.
Definitions
- Renewal premium
- The price an insurer offers to continue a policy for another term. It can change even when nothing about you or the coverage has.
- Deductible
- The part of each covered loss you pay before the insurer pays the rest. A higher deductible lowers the premium and raises what a claim costs you.
- Expected out-of-pocket cost
- Claims you expect a year times the extra you would pay on each one. It is an average over many years, not what any single year will cost.
- Break-even claim rate
- The number of claims a year at which a higher deductible's premium saving exactly equals the extra deductibles paid. Above it, the lower deductible is cheaper.
- Like-for-like quote
- A competing quote with the same coverage types, limits, deductibles and endorsements as the policy it is compared with. Anything else compares two different products.
Good to know
Why a renewal increase compounds
A renewal notice usually shows the new premium beside the old one, and the difference looks like a one-year cost. It is not. Unless the premium later falls, the higher price becomes the base for every future renewal, and each later increase is a percentage of that higher base. In the example the premium rises from $2,400 to $2,880, a 20% increase or $40 a month. If it then rises 5% a year, the next four renewals come in at $3,024, $3,175, $3,334 and $3,501. Over five years the household pays $15,914, against $12,000 had the premium stayed at $2,400. The increase therefore costs $3,914 over five years, not $480. The page splits that figure in two. The renewal's jump, $480 a year repeated for five years, accounts for $2,400. The yearly rises after it account for the other $1,514. That second part depends entirely on your assumption about future increases, which is why the field is labelled as yours: no source can forecast what your insurer will charge you. Run the page at two or three rates, perhaps 0%, 5% and 10%, and see how much the answer moves. A flat assumption is the most optimistic case, and the result is still $2,400 over five years. The point of pricing the increase over several years is not to predict the future precisely but to make the stakes visible. A $40-a-month increase is easy to accept on the day the notice arrives. Seen as nearly $4,000 over five years, it is worth an hour of shopping and a conversation about deductibles. The chart on this page shows the gap between the two paths widening each year, which is what compounding looks like, and the table beside it shows how the two levers change each year's cost.
Weighing a higher deductible against the claims you expect
Raising a deductible is the lever most policyholders can pull without changing insurers, and it is often misjudged in both directions. The deductible is the part of each covered loss you pay before the insurer pays the rest. A higher deductible lowers the premium, because the insurer pays less on every claim and handles fewer small ones. The question is whether the premium you save is worth more than the extra you will pay when something happens. The page answers it with expected value. In the example the insurer quotes a 10% discount for a deductible $500 higher. Applied to the renewal premiums, that saves $1,591 over five years. Against it, the page counts how often you expect a claim that costs more than the higher deductible. At 0.08 claims a year, about one every 12 years, each costing you up to $500 more, the expected extra out of pocket is $40 a year, $200 over five years. The higher deductible is worth $1,391 on these figures. The page also shows the break-even point, the claim rate at which the lever stops paying: about 0.58 claims a year, or one every 1.7 years. For auto policies, Insurance Information Institute figures based on Verisk ISO data put collision and comprehensive claims together at about 0.08 per car-year in 2024, which is where the example comes from; your own claims history is a better guide if you have one. Expected value is an average, and averages hide the year a claim actually happens. Take the higher deductible only if you could pay it the day of a loss without borrowing, which is why an emergency fund comes first. For a car policy, the car insurance deductible page makes the decision in full from the two premiums you were quoted, including how much cash you have on hand.
Shopping the renewal: what makes quotes comparable
The second lever is a competing quote, and it is the one that tells you whether an increase reflects the market or only your insurer. In the example a quote of $2,550 against the $2,880 renewal saves $330 in the first year and $1,823 over five years, assuming both premiums rise at the same rate afterward. Combined with the higher deductible, applied to the cheaper premium, the two levers save $3,032 over five years after expected claims, 77% of the $3,914 the increase costs. A quote is only useful if it prices the same thing. Before comparing, line up the coverage types, the liability limits, the deductibles for each coverage, and any endorsements such as replacement cost, water backup or rental reimbursement. A cheaper quote with lower limits or a missing endorsement is a different product, not a better price. Check which discounts each quote assumes, such as bundling home and auto, a telematics program or paying in full, and whether you actually qualify for them. A quote also becomes a price only once the new insurer has underwritten the policy, which may include checking your claims history, driving record or the condition of the home, so do not cancel the old policy until the new one is in force. Timing matters. Start shopping as soon as the renewal notice arrives, so there is time to compare before the renewal date and avoid a gap in coverage, which can itself raise future premiums or breach a loan or mortgage requirement. If the competing quotes cluster near your renewal price, the increase is probably the market, and the deductible lever is where savings remain. If they come in well below it, the difference is the cost of staying put. Either way, one round of quotes at renewal is inexpensive information.
What national insurance prices are doing
It is natural to ask whether an increase is unusual. For auto insurance there is a national measure: the motor vehicle insurance index in the consumer price index, published monthly by the Bureau of Labor Statistics. Its recent path is a reminder that premiums do not only go up. The index fell 5.1% over the 12 months to August 2026, after rising 49.8% over the five years from August 2021. In other words, auto insurance prices climbed steeply over several years and then eased back over the most recent one. That matters when you read your own renewal. If your auto premium rose sharply in a year when the national index fell, the gap points to something specific to you, your car, your area or your insurer, and it is a strong reason to get quotes. If your premium rose modestly or held steady, you may already be close to the market. A national index has real limits, though. It is an average across drivers, states and insurers, and individual premiums depend on driving records, claims history, the vehicle, where it is garaged and how far it is driven, so a single household's premium can move against the national trend for legitimate reasons. For homeowners insurance this page offers no national benchmark, and your own competing quotes are the comparison to use. The arithmetic on the page works the same for a home, renters or auto policy. If a homeowners premium is paid through a mortgage escrow account, a renewal increase also changes the monthly mortgage payment, sometimes with a shortage to make up for months already paid at the old amount; the escrow account page works through that. To estimate a premium before any notice arrives, the homeowners insurance and auto insurance pages start from the coverage itself rather than from a renewal.
Frequently asked questions
How much does an insurance premium increase really cost?
More than the first year's difference, because each renewal builds on the last. In the example a premium rising from $2,400 to $2,880, a 20% increase, and then 5% a year costs $15,914 over five years, $3,914 more than five years at $2,400. Of that, $2,400 is the renewal's $480 jump repeated each year and $1,514 comes from the yearly rises after it.
Should I raise my deductible to lower my premium?
It pays when the premium saved is more than the extra you expect to pay on claims. In the example a 10% discount for a deductible $500 higher saves $1,591 over five years; at 0.08 claims a year the expected extra out of pocket is $200, so the lever is worth $1,391. It stops paying at about 0.58 claims a year. Raise the deductible only if you could pay it the day a claim happens. For a car policy, the car insurance deductible page makes the decision in full from the two premiums you were quoted.
Is it worth switching insurers after a rate increase?
Often, but only on a like-for-like quote. In the example a competing quote of $2,550 against the $2,880 renewal saves $1,823 over five years if both premiums rise at the same rate. Check that the liability limits, deductibles, endorsements and discounts match, and treat a quote as a price only once the new insurer has underwritten the policy.
How much of the increase can I claw back?
In the example, switching to the cheaper quote and taking the higher deductible together save $3,032 over five years after expected claims, 77% of the $3,914 the renewal increase costs. The remaining $882 is what the increase still costs after both levers.
Are car insurance prices still going up?
Nationally, not over the last year. The motor vehicle insurance index in the consumer price index fell 5.1% over the 12 months to August 2026, after rising 49.8% over the five years from August 2021. Your own premium depends on your record, car, location and insurer, so a national index cannot say what is fair for you, but an auto renewal that rose while the index fell is a strong reason to get quotes.
How many claims a year should I assume?
Use your own history if you have one. For auto policies, Insurance Information Institute figures from Verisk ISO data put collision and comprehensive claims together at about 0.08 per car-year in 2024, roughly one every 12 years. Count only claims that would cost more than the higher deductible, because smaller losses cost you the same under either deductible.
Does this page work for home insurance too?
Yes. The arithmetic is the same for a homeowners, renters or auto policy: the premiums, the discount for a higher deductible and a quote. Only the national benchmark is auto-specific. To estimate a homeowners premium from scratch use the homeowners insurance page, and if the premium is paid through a mortgage escrow account, the escrow account page shows how the increase reaches your monthly payment.