Updated April 2026 | Insurance Information Institute, NerdWallet 2026
Car Insurance Bundle Discount Per Month: 10 to 25% Combined Savings
Auto plus home is the canonical bundle. State Farm, Liberty Mutual, USAA, Allstate lead. Carrier-by-carrier savings, the auto + renters case, and the multi-line stack with motorcycle, RV, and boat.
Carrier bundle savings ranked
| Carrier | Auto+Home savings | Notes |
|---|---|---|
| State Farm | 17-25% | Underwrites both. Industry-leading |
| USAA | 17-22% | Military-eligible. Both underwritten |
| Liberty Mutual | 15-20% | Both underwritten. Strong claims |
| Allstate | 10-25% | Varies by state and product mix |
| Nationwide | 10-20% | Both underwritten in most states |
| Farmers | 10-18% | Both underwritten in most states |
| Travelers | 10-15% | Both underwritten |
| Erie | 10-15% | Both underwritten in 12-state footprint |
| GEICO | 5-10% | Acts as agent for home carrier partner |
| Progressive | 5-12% | Both underwritten in some states |
The bundle is not always the cheapest total
A common error: assuming that the largest bundle discount carrier gives you the lowest total cost. That is not always true. The bundle discount is applied to the carrier's base rate, which may not be the cheapest in either line individually.
Concrete example. A household needs auto and homeowners coverage. They get four quotes:
- State Farm bundle: $200 auto + $145 home = $345/mo unbundled, $290/mo bundled (15% off)
- GEICO auto + Liberty Mutual home (separate): $170 auto + $130 home = $300/mo (no bundle, but cheaper carriers in each line)
- Allstate bundle: $230 auto + $160 home = $390 unbundled, $312 bundled (20% off)
- USAA bundle (if eligible): $155 auto + $115 home = $270 unbundled, $230 bundled (15% off)
The winner is USAA's bundle if eligible at $230/mo. The runner-up is the unbundled GEICO + Liberty Mutual combination at $300/mo. State Farm bundle at $290/mo is third. Allstate bundle at $312/mo is fourth, despite having the largest percentage bundle discount, because the base rates were higher to start.
The lesson: always quote both bundled and unbundled at 4 to 5 carriers. The bundle wins on convenience (one bill, one renewal, one agent), but the dollar amount may favour unbundled at best-of-breed carriers in each line.
The auto + renters case
For renters, bundling auto with renters insurance is almost always free or net-positive. A typical renters policy costs $12 to $20 per month for $20,000 to $50,000 in personal property coverage plus $100,000 to $300,000 in personal liability. The auto bundle discount typically generates $10 to $25 per month in auto savings, which often exceeds the renters policy cost. Net result: free renters insurance plus a small auto premium reduction.
For renters who do not currently have renters insurance (the majority of US renters), this is the cheapest way to add coverage of personal belongings, liability protection, and loss-of-use coverage if the rental becomes uninhabitable due to fire or water damage. The bundle savings make renters insurance effectively free or close to it.