4. Lust

4. Lust

Lusting after speedy cars, expensive "toys" like speed boats or an in-ground pool can also cause your insurance costs to skyrocket or require you to purchase an insurance rider or an extra insurance policy.

Items such as "in-ground pools and trampolines can certainly add to a homeowner's insurance policy because you've got a big liability," Barry says. That increased risk may require you to buy extra liability coverage, such as an umbrella policy, which provides additional liability coverage above the limits of your homeowners, auto, and boat insurance policies. It kicks in when the liability on these other policies has been exhausted.