Identity theft is someone opening credit, filing a tax return, claiming benefits or renting an apartment in your name. The money they take is usually not the largest cost; banks and card issuers reverse fraudulent charges under consumer protection rules, and a stolen card is closed in a phone call. The cost is the months afterward: disputing accounts with three credit bureaus, affidavits, notarised letters, time off work to appear at a bank or a courthouse, and a legal bill when a collector or a court does not accept that it was not you.
The insurance is built around that aftermath. An identity theft endorsement on a home, condo or renters policy reimburses the expenses of restoring your identity up to a modest limit, and many carriers now include a restoration service, a case manager with a limited power of attorney who works the disputes for you. Standalone services add credit and dark-web monitoring, alerts, and a larger expense limit, for a monthly fee.
What it does not do is refund the money taken from an account, which is the bank's job under federal and state rules, or prevent the theft in the first place. A credit freeze at each bureau costs nothing, stops new accounts from being opened, and does more to prevent the loss than any policy; the recommendation from this desk is to freeze first and insure the aftermath second.
The cost is set by whether it is an endorsement or a standalone plan, the expense limit, whether monitoring and restoration are included, and the number of people covered. On an endorsement it is a small line on the home policy, and the analysis simply checks whether you already have it.