The types and amounts of auto insurance discounts can fluctuate from carrier to carrier, but some discounts are fairly common across the board. Read on for the ten car insurance discounts carriers offer most frequently.

1. Multiline discount. The multiline, or multiple-policy, auto insurance discount is a safe bet with any provider that offers more than one type of insurance. With the multiline discount, policyholders save when they hold more than one kind of policy with the same carrier, such as auto and home insurance.
2. Safe-driver discount. Safe drivers file fewer claims, and insurers reward them with auto insurance discounts as a result. If your driving record is free of moving violations and accidents for the last five years, you are much more likely to qualify for discount car insurance.
3. Good-student discount. If you are a full-time student under the age of 25 and meet your insurer's grade-point requirement, you may qualify for a good-student auto insurance discount.
4. Vehicle safety equipment discount. One way to obtain discount car insurance is to purchase a vehicle loaded with eligible safety equipment. Most insurers offer discounts for airbags, seatbelts, anti-lock brakes, and other life-saving safety device.
5. Auto club discount. Policyholders who belong to certain auto clubs may receive substantial auto insurance discounts. If you currently belong to an auto club, you might contact the organization to see which carriers provide discount car insurance to members.
6. Defensive driver discount. Although not all car insurers offer this discount, many will reduce their premiums considerably for policyholders who have successfully completed a defensive-driving course approved by the carrier. Some driver's education classes may qualify as well.
7. Limited use discount. Also known as the low mileage auto insurance discount, the limited use discount applies to policyholders who drive under a certain amount of miles per year. Low mileage auto insurance discounts typically save you 10-15 percent on your premiums.
8. Multiple vehicle discount. Covering more than one vehicle with the same discount car insurance policy can result in substantial savings. Think about putting all of the vehicles in your household on the same policy to save.
9. Military discount. Former, active, and reserve members of the military often qualify for an auto insurance discount with their providers. Ask your carrier for details.
10. Automatic payment discount. When you authorize your car insurance company to automatically withdraw your payments from your checking account or debit or credit card, you may receive a small auto insurance discount on your premiums.