Auto Insurance Discount Stacking Calculator
Toggle the discounts you qualify for. We do the multiplicative math (not the misleading additive math) so you see the real final premium.
Why this calculator exists
Most online "discount lists" quietly add percentages together. Real auto insurance discounts apply multiplicatively — each one reduces the running premium, not the original. A 20% + 10% stack = 28% off, not 30%. Stack 5 mid-size discounts and the difference between additive and multiplicative is hundreds of dollars.
1. Your base premium (before any discounts)
US average is ~$1,771/yr full coverage. Set this to whatever your carrier quoted you before discounts.
2. Select discounts you qualify for
3. Your real (multiplicative) premium
Get a Quote With All Your Discounts Applied
Plug your numbers into a real quote. State Farm has the highest Good Student discount and the largest bundle savings — make sure every discount in your stack is actually applied.
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