How to use the band
Collect four real quotes from licensed insurers with matched coverage limits and deductibles, then compare each quote to your band:
- If three or four quotes sit inside your band: the pricing is reasonable for your profile. Pick on the standard criteria (total annualised cost, carrier reputation, claim experience, agent relationship).
- If most quotes sit 25% or more above your band: either the band is wrong for your state or one of the inputs is under-selected. Check your state DOI page for the tier you chose; re-check vehicle class and coverage level.
- If one quote sits 40% or more below your band: verify the coverage line by line on the declaration page. Quote under-pricing almost always means the coverage is lighter than you asked for.
- If nothing sits inside your band: widen the shop. Add one specialty carrier (USAA for military, Erie or Auto-Owners in their regions) and one non-standard carrier if you have any surcharges.
What the tool deliberately does not do
The tool is honest about what it cannot reproduce:
- It does not simulate any specific insurer's filed rating algorithm. Your real quote will differ from the band.
- It does not use your exact ZIP. State-tier is intentionally coarse.
- It does not reflect multi-line, telematics, good-student, or carrier-specific discounts you may qualify for.
- It does not name carriers. There is no "cheapest carrier for your band" output.
- It does not estimate future premium changes. It reflects current public-data multipliers only.
Frequently asked questions
Why does this tool output a band and not a dollar amount?
A dollar amount would imply a precision we cannot defend. Every US insurer rates its own filed plan with each state insurance department, and those filings are the authoritative pricing. A third-party calculator cannot reproduce any specific insurer's filed rate algorithm against your profile. What we can do is apply cited public-data multipliers to a cited national reference range to produce a directional band you can use to judge whether a real quote looks reasonable. Full methodology at Methodology.
How do I use the band the tool gives me?
Treat it as a sanity check on real quotes. If you get four quotes and three of them sit well above your band (say 25% above the band midpoint or more), the band suggests you should get a fifth quote or check the coverage on the three. If one quote sits well below the band, verify the coverage matches what you requested (minimum-state-limits quotes routinely come in 40% below a standard full-coverage band). See How to shop.
What does the band deliberately NOT do?
It does not replicate any specific insurer's rating algorithm; it does not use your exact ZIP (the state-tier approximation is intentionally coarse); it does not reflect multi-line discounts, telematics participation, or carrier-specific loyalty credits; and it does not name carriers or imply one carrier is cheapest for your profile. For those answers you need to quote with real insurers. See How to shop.
Where do the multipliers come from?
Each input's multiplier range is cited on its deep-dive page: state tiers on state-cost-tiers, age on age-and-experience-bands, record and credit on high-risk-and-surcharges, coverage on coverage-and-monthly-cost, vehicle class on vehicle-class-impact, billing on how-billing-works. The sources are III, NAIC, IIHS HLDI, IRC, and state DOI consumer material, with named aggregator reports (Bankrate, Insurify, The Zebra) for the national reference range.
Why do I need to re-shop if the tool already gives me a band?
Because the band is a range across public data, not a personal quote. Two drivers in the same band will see different real quotes because the carriers that lead the band for a given profile vary by state and by the weights each carrier assigns to the same inputs. The band answers 'is this quote reasonable for a profile like mine?'; real quotes answer 'what will I actually pay?'. See How to shop for the four-way method.
Next step
How to shop
The four-way quote comparison method.
Also useful
Methodology
Every multiplier, every source, and why we use bands.
Related
What drives your premium
The seven factors behind each multiplier.
Sources
Last verified April 2026- 1.National reference range: Bankrate Average cost of car insurance monthly refresh; Insurify US Auto Insurance Report; The Zebra State of Auto Insurance Report; III Auto Insurance facts page.
- 2.State tier assignments: III state profiles and NAIC Auto Insurance Database Report.
- 3.Age multipliers: III Teen and Young Driver research; IIHS fatal-crash statistics by age.
- 4.Record multipliers: Insurance Research Council (IRC) claim-experience research; III surcharge explainer.
- 5.Coverage ratios: III coverage explainer; Bankrate liability-only vs full-coverage comparison.
- 6.Vehicle class multipliers: IIHS HLDI insurance loss reports; NICB Hot Wheels theft report.
- 7.Credit-based insurance score impact: NAIC Credit-Based Insurance Scoring white paper; state DOI bulletins.
- 8.Pay-in-full discount: III How to Save Money on Auto Insurance; state DOI consumer material.