What bundling is, and what it saves
Bundling, also called a multi-policy discount, means buying two or more types of insurance from the same company. The most common pairing is home and auto, but it can also mean auto with renters or condo cover, or more than one vehicle with one carrier. The insurer offers the discount because bundled customers tend to stay longer and cost less to serve — and because a customer with two policies is harder for a competitor to win with one quote.
The Insurance Information Institute notes that some companies that sell homeowners, auto and liability coverage will take 5 to 15 percent off your premium if you buy two or more policies from them, and lists bundling among its ways to cut car insurance costs. Other published figures run higher — some analyses put the typical combined saving at 10 to 25% — but those figures come from different methods and different years, and the Institute's 5 to 15% is the sourced range used here. The exact discount varies by insurer, state and the policies involved, and it is usually applied unevenly: a larger percentage on the auto side and a smaller one on the home side, or the reverse, rather than one flat percentage on the combined bill.
An ILLUSTRATIVE example shows the arithmetic. A household paying $1,550 a year for auto and $2,000 for homeowners — $3,550 combined — at a 10% blended discount saves $355, bringing the combined bill to about $3,195. At 15% the saving is about $533. Those are ILLUSTRATIVE figures on assumed premiums, not a quote and not a promise: your saving depends on your starting prices, which is the whole point of the next section.
When a bundle wins, and when it loses
A bundle wins when the same company is competitive on both lines. That is common for households whose auto and home risks are both ordinary — a clean driving record, a standard home, no recent claims — because the same underwriting that prices one line well usually prices the other well too. It also wins on convenience: one renewal date, one payment, one insurer to call after a loss, and one set of documents.
A bundle loses when one line is weak. A company with cheap auto cover and expensive homeowners cover can offer a generous bundle discount and still cost more combined than a cheap auto policy from one company and a cheap homeowners policy from another. The Institute makes the point directly, advising that after a bundling offer you should make certain the combined price is lower than buying the different coverages from different companies. The test is therefore two quotes, not one: the bundled combined price, against the best separate auto price plus the best separate home price, for the same cover on each side.
There are two smaller points worth checking. Some carriers offer a single deductible for a single event that damages both the home and the car — a tree falling on the house and the car in the driveway, for example — so you pay one deductible instead of two. And some bundles add an umbrella policy at a discount, which is worth pricing separately: umbrella cover is cheap per dollar, and a bundle that includes it is not automatically cheaper than buying it standalone.
What to compare before you bundle
Compare the cover, not just the price. A bundle that saves $300 a year by cutting the home policy's dwelling limit or raising the auto deductible has not saved $300 — it has sold $300 of cover. Check the dwelling limit against rebuild cost, the auto liability limits against your assets, and the deductibles on both sides, before comparing any price. The site's car insurance calculator holds the figures you enter for the auto side, and the homeowners cost calculator estimates the cover side of the home — run both before you compare a bundle against separate policies.
Check the discount's conditions. Some multi-policy discounts require both policies to be active on the same date, and lapse if one is cancelled; some apply only to certain policy forms; some are filed by state, so the same carrier's discount differs across state lines. Ask whether the discount applies to the whole premium or only to part of it — a 10% discount on the auto premium alone is a different number from 10% on the combined bill.
Check the renewal. A bundle discount that is generous in year one and smaller at renewal is a common pattern, and a carrier that wins your bundle with a first-year price may not win it in year two. Set a reminder to re-quote both the bundle and the separate policies at renewal, and treat the bundle as a price to be re-tested, not a decision made once.
Worked example
Consider two ILLUSTRATIVE households. The first pays $1,550 for auto and $2,000 for homeowners separately, and is offered a bundle at $1,350 for auto and $1,700 for home after the multi-policy discount — $3,050 combined, a $500 saving on identical cover, and the bundle wins. The second pays the same $3,550 separately, but the bundling carrier's home price is high: the bundle is $1,400 for auto and $2,100 for home, $3,500 combined, a $50 saving that vanishes when the home deductible is $1,000 higher than the separate policy's — and the separate policies win. These are ILLUSTRATIVE contrasts on assumed prices; they predict no real household's saving, and no premium figure is asserted for either household.
Illustrative example only — not a fact about any real policy.