| Scenario | Current total | New base | Discounts | Deductible change | Annual savings |
|---|---|---|---|---|---|
| Bundle + telematics | $1,840 | $1,500 | 20% | +$500 | $420 |
| Low miles + safe driver | $1,600 | $1,450 | 14% | +$0 | $240 |
| Higher miles + one violation | $1,700 | $1,550 | 6% | -$250 | $60 |
- Current total = Current premium + Current fees
- Modeled new (before fees) = New base × (1 + MileageAdj) × (1 + RiskAdj) × (1 + DeductibleAdj) × (1 − DiscountPct)
- Modeled new total = Modeled new (before fees) + New fees
- Annual savings = Current total − Modeled new total
- Monthly savings = Annual savings ÷ 12
- Deductible break-even months = (New deductible − Current deductible) ÷ Monthly savings, when both are positive
- Enter your current yearly premium and any policy fees.
- Enter the new base quote and the new policy fees.
- Set current and new deductibles for break-even insight.
- Add annual miles, plus any recent claims or violations.
- Select discounts you expect to qualify for.
- Click Calculate Savings to view results above the form.
- Use the CSV or PDF buttons to export your summary.
Premium baseline and fees
Start with the annual premium plus policy fees. Many drivers forget installment charges, roadside add-ons, and filing fees. For example, a $1,800 premium with $40 fees equals a $1,840 current total. When comparing quotes, keep fees separate from the base premium because fees often do not change with discounts. This tool totals both sides so the savings number reflects what you pay across the year.
Discount stack and caps
Discounts are applied as a combined percentage, then capped to keep outputs realistic. Typical ranges include bundling, safe driving, multi-vehicle, and telematics participation. If your selected discounts add up to 27%, a $1,500 base premium becomes $1,095 before other adjustments. If selections exceed the cap, the calculator limits the total to 35% to avoid optimistic results that rarely match underwriting.
Mileage and risk adjustments
Mileage is compared to a baseline, such as 12,000 miles. Driving 15,000 miles raises the mileage ratio to 1.25 and can apply a small surcharge. Driving 9,000 miles can create a modest reduction. Risk is modeled from recent claims and violations. Each claim and violation adds a percent adjustment, reflecting how surcharges often outweigh small discounts. Use your best estimate and rerun scenarios to understand sensitivity.
Deductible trade-off and break-even
Higher deductibles can reduce premiums but increase out-of-pocket exposure. The calculator estimates a deductible adjustment and computes break-even months when monthly savings are positive. If you raise the deductible by $500 and save $20 per month, break-even is 25 months. If savings are negative, break-even is not shown. Use this as a planning metric and consider your emergency fund.
Decision workflow and exports
After calculating, export results to CSV for side-by-side comparisons across insurers, vehicles, or coverage changes. The PDF summary is useful for renewal discussions because it captures assumptions like miles, claims, and selected discounts. For a process, run three scenarios: conservative discounts, expected discounts, and best case. Then set a savings threshold, such as $150 per year, before switching policies. Always verify coverages match.
What does this tool estimate?
It estimates annual and monthly premium changes by applying mileage, risk, deductible, and discount assumptions to a base quote, then adding fees for a practical total.
Is the result an insurance quote?
No. It is an educational estimate. Actual pricing depends on underwriting, coverage limits, vehicle data, territory, and carrier-specific rules.
Why are discounts capped?
Stacked discounts can exceed realistic outcomes. Capping helps prevent overly optimistic projections when many discounts are selected together.
How should I choose the baseline miles?
Use a common reference like 12,000 miles, or your insurer’s threshold. Keep it consistent when comparing scenarios so changes reflect true mileage differences.
How is break-even for a higher deductible calculated?
If you increase the deductible and still save monthly, break-even months equal deductible increase divided by monthly savings. It indicates how long savings may offset the higher deductible.
What inputs matter most for savings?
Discount eligibility, claims or violations, and deductible changes usually move the estimate most. Fees matter too, because they reduce savings even when the premium decreases.