Deductible (Self-Pay Amount) Change Premium Impact Comparison

Enter your current Japanese voluntary car insurance premium to estimate how changing the collision deductible tier (0 yen, 50,000 yen, or 100,000 yen) affects your annual premium.

Deductible tier factor guide

General factor estimates for the deductible tier, which affects the premium independently of the no-fleet grade, license color, age condition, and driver scope. Negative figures in the table are discounts.

Deductible tier Estimated factor
0 yen (no deductible) +10%
50,000 yen Baseline (no change)
100,000 yen -7%

Deductible tier factors vary by insurer's product design and no unified public data exists. The figures in the table are general estimates based on ranges commonly described by insurers.

Tips

  • Check your policy certificate or insurer account for your current deductible tier and annual premium before entering the values for a more accurate comparison.
  • Raising the deductible lowers the premium but increases how much you pay out of pocket after an accident, so weigh your household budget against the premium savings before choosing.
  • This comparison isolates only the deductible effect. Your actual premium can still move if the license color, age condition, driver scope, or no-fleet grade changes at the same renewal.
  • Drivers who expect to use collision coverage rarely tend to benefit more from setting a higher deductible to keep the premium down.

Frequently asked questions

It is the amount you pay out of pocket when using collision coverage after an accident. With a 0 yen deductible, the full repair cost is covered; with a set deductible, that amount is subtracted from the payout.

It varies by insurer, but raising the deductible from 50,000 yen to 100,000 yen typically lowers the premium by a few percent. Conversely, setting it to 0 yen tends to add a surcharge.

In most cases you can change it at renewal. If you want to change it mid-term, check with your insurer or agent whether a policy amendment is possible.

Yes, you would pay more out of pocket if you have an accident. If your car is expensive to repair or you are less confident driving, a lower deductible may offer more peace of mind.
ツールくん

Side Note — The deductible reflects a "small accidents on you, big accidents on insurance" mindset

The deductible tells your insurer in advance how much of an accident cost you are willing to cover yourself. Setting it higher means paying for minor damage out of pocket instead of filing a claim, but it also lowers the insurer's payout risk, which brings the premium down.

Some policies use a tiered deductible such as "0 yen for the first claim, 50,000 yen from the second claim," which fully covers the first accident while asking for a self-pay amount afterward — a design meant to balance premium and coverage.

Like license color, age condition, and driver scope, the deductible affects the premium as a factor independent of the no-fleet grade. Simulating the household impact of an actual accident, then weighing the premium savings against the self-pay risk, helps you choose wisely.

Browse all trivia

People who viewed this tool also viewed

Electricity Cost Calculator | Estimate Monthly Bill by Appliance

Enter each appliance's wattage, usage time, and electricity rate to estimate your monthly electricity bill. Add multiple appliances and see the total cost at a glance.

Car Maintenance Cost Calculator | Monthly & Annual Running Costs

Enter vehicle tax, optional insurance, inspection fees, parking, and gasoline costs to estimate the total monthly and yearly cost of keeping your car on the road.

Vehicle Tax Calculator (Japan)

Enter your engine displacement (for regular cars) or vehicle type (for kei cars) along with the first registration date to estimate Japan's annual automobile tax or light vehicle tax, including whether the aged-vehicle s...

Vehicle Tax Proration Calculator (Japan)

Estimate the prorated Japanese automobile tax when you register a regular or compact car partway through the fiscal year, or deregister (scrap) one. Enter the displacement, fuel type, and registration date to see the est...

Environmental Performance Tax Calculator (Japan)

Enter the vehicle price and fuel efficiency achievement tier to estimate Japan's Environmental Performance Tax, a one-time tax charged when you acquire a car. Supports the lower rate cap for kei (light) cars.

Compulsory Automobile Liability Insurance (CALI / Jibaiseki) Calculator

Choose a vehicle category (passenger car, kei car, motorcycle, or moped) and a contract term to estimate Japan's mandatory CALI insurance premium required for vehicle inspection and registration.