How to Use This Calculator
- 1
Enter Policy Details
Input your current and new annual premiums, both deductibles, and any additional costs or discounts associated with the new policy (use negative values for discounts).
- 2
Review Results
See your Annual Premium Savings, Total Cost Difference (including deductible impact), and Savings Rate cards. The Insights panel shows monthly/5-year projections, deductible analysis, coverage check, and switching value.
Example Calculation
A driver currently paying $1,200/year with a $500 deductible found a new policy for $1,000/year with a $300 deductible and no additional costs.
Current Insurance Premium ($)
1,200
New Insurance Premium ($)
1,000
Current Deductible ($)
500
New Deductible ($)
300
Additional Costs or Discounts ($)
0
Results
Annual Savings
$200
Total Cost Difference
$400
Savings Rate
16.7%
Insights card shows $16.
Tips
$400 Total Advantage Includes Deductible Bonus
Beyond the $200 annual premium savings, the new policy's $200 lower deductible means you save an additional $200 per claim. Total cost difference is $400 — double the premium savings alone.
16.7% Savings Is Above Average
Typical policy switches save 5-15% on premiums. At 16.7% ($200/year), this exceeds the average, suggesting competitive pricing rather than reduced coverage. Still verify comparable liability limits and coverage.
$1,000 Over 5 Years for 30 Minutes of Work
If comparing quotes takes 30-60 minutes, you're earning $200-$400/hour of your time. Over 5 years, the $1,000 in premium savings makes this one of the highest-return financial tasks available.
Use History to Compare Quotes
Each calculation is saved automatically. Click the clock icon to compare multiple quotes side by side — enter each insurer's numbers and review all scenarios together.
Unlocking Savings: Comparing Auto Insurance Policies with Precision
The Auto Insurance Savings Calculator quantifies the financial benefit of switching policies by comparing premiums, deductibles, and additional costs.
For a driver moving from $1,200/year with a $500 deductible to $1,000/year with a $300 deductible, the annual premium savings are $200 (16.7%), but the total cost advantage is $400 when the lower deductible is included — a distinction that matters when evaluating whether to switch.
Formulas for Calculating Auto Insurance Savings
The calculator uses straightforward comparisons:
Annual Savings = Current Premium - New Premium
Savings Rate = Annual Savings / Current Premium x 100
Deductible Change = Current Deductible - New Deductible
Total Cost Difference = (Current Premium + Current Deductible) - (New Premium + New Deductible + Additional Costs)
Net Annual Benefit = Annual Savings - Additional Costs
The Total Cost Difference is the most complete metric — it captures both premium and deductible changes to show the true financial advantage (or disadvantage) per year.
Example: Quantifying Savings for a Policy Switch
A driver evaluating a new auto insurance policy:
- Current Premium: $1,200/year | Current Deductible: $500
- New Premium: $1,000/year | New Deductible: $300
- Additional Costs: $0
- Annual Savings:
$1,200 - $1,000 = $200 - Savings Rate:
$200 / $1,200 = 16.7% - Deductible Change:
$500 - $300 = $200 lower(saves $200 per claim) - Total Cost Difference:
($1,200 + $500) - ($1,000 + $300) = $400 - Monthly Savings:
$200 / 12 = $16.67 - 5-Year Savings:
$200 x 5 = $1,000
The new policy saves $200/year in premiums with a $400 total cost advantage including the lower deductible.
Over 5 years, premium savings alone total $1,000.
Understanding Premium vs. Deductible Savings
Premium savings ($200/year here) are guaranteed — you pay less every year regardless of claims.
Deductible savings ($200 lower here) are contingent — you only benefit if you file a claim, but then you save $200 out-of-pocket.
The Total Cost Difference ($400) combines both, assuming one claim per year.
For drivers who rarely file claims, premium savings matter more; for those with frequent incidents, deductible changes can dominate the equation.
A 16.7% premium reduction with a simultaneously lower deductible — as in this example — is an unambiguous win.
Frequently Asked Questions
How does the Auto Insurance Savings Calculator work?
It compares your current policy (premium + deductible) against a new policy, factoring in any additional costs. For $1,200 current vs $1,000 new premium with deductibles of $500 vs $300: annual premium savings = $200 (16.7%), total cost difference = $400 (including deductible benefit), and 5-year savings = $1,000.
What is the Total Cost Difference vs Annual Savings?
Annual Savings ($200) is purely the premium difference. Total Cost Difference ($400) also includes deductible changes — since the new deductible is $200 lower, you save an additional $200 per claim. If you never file a claim, only the premium savings materialize; if you do, the total advantage is $400.
How does a higher deductible affect my savings?
A lower premium with a higher deductible is a trade-off. If the new deductible were $700 instead of $300, you'd save $200/year in premium but pay $200 more per claim. You'd need fewer than 1 claim per year for the switch to pay off. The calculator's Total Cost Difference captures this trade-off.
What does the Savings Rate percentage mean?
It's the annual premium savings as a percentage of your current premium: $200 / $1,200 = 16.7%. This contextualizes the dollar savings — a $200 saving on a $1,200 policy (16.7%) is more significant than $200 on a $3,000 policy (6.7%). Typical switch savings range from 5-15%.
Should I switch even for small savings?
Generally yes, if coverage is comparable. Even $100/year ($8.33/month) compounds to $500 over 5 years. The effort to switch is usually 30-60 minutes, making almost any positive savings worth it. However, avoid switching if coverage limits, exclusions, or claims service quality are significantly worse.
What counts as Additional Costs or Discounts?
Include any sign-up fees, cancellation penalties from your current insurer, or equipment costs (e.g., telematics devices). For discounts, enter negative values — for example, a $50 safe-driving rebate would be entered as -50, increasing your net savings to $250/year.