The best way to buy an extra $1,000,000 of protection is with your current auto and home insurance company, as they will have a bundled rate, discounted because of the other 2 policies. But there are also insurance companies out there that have "stand alone" policies, that will go over your existing auto and home insurance.

Let's say you have an at-fault auto accident, where you injure the 2 parties in the other car. They see an attorney advertising on TV and decide to press you with a lawsuit for their pain and suffering (actually 2 lawsuits). Your auto policy will cover the initial $250,000 per person and $500,000 per accident coverage for the lawsuit (your need $250,000/$500,000 to qualify for an umbrella insurance policy).

Once those limits have been satisfied, then you $1,000,000 (or more) umbrella insurance limit would kick in and provide the additional liability coverage for your lawsuit. This coverage protects you and your family in the event you are found guilty of any amount over the $250,000 per person. Be a smart insurance consumer.