One of the strongest defenses against identity theft is also completely free, and most people never turn it on. A credit freeze locks down your credit reports at the three nationwide bureaus so that no new lender can pull them — which means a thief who has your name, birth date, and Social Security number still cannot open a credit card or loan in your name. Since 2018, federal law has required the bureaus to place and lift these freezes at no charge, yet the tool remains badly underused by the households it protects most.
What a security freeze actually does
When your credit is frozen, the three bureaus — Equifax, Experian, and TransUnion — will not release your credit report to most new creditors. Because a bank or card issuer almost always checks your report before approving a new account, a freeze stops the most common form of identity theft: someone opening credit in your name and leaving you with the bills.
The Federal Trade Commission lays out how this works in its guide to credit freezes and fraud alerts, and the key point is that a freeze is both free and free to lift. It does not lower your credit score, and it does not touch the accounts you already have.
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You have to freeze all three bureaus, one at a time
There is no single switch. To be fully protected you must place a freeze separately with each of the three bureaus, because a lender might check any one of them. Each request takes only a few minutes online or by phone, and by law the bureau must put the freeze in place quickly — generally within one business day when you request it online or over the phone. When you set up a freeze, each bureau gives you a PIN or lets you create an account; keep that information somewhere safe, because you will need it to lift the freeze later. Freezing the credit of a spouse, and even of children or other dependents who have a credit file, closes off doors that thieves specifically target, since a child’s unused Social Security number can go unmonitored for years. Keep a simple record of which bureaus you have frozen and where you stored each PIN, so the protection does not become a hassle the first time you need to apply for something. If you were the victim of a breach notification, the letter often includes direct links to each bureau’s freeze page, which can save you a few minutes.
Freezing doesn’t lock you out of your own credit
A freeze is not permanent and does not stop you from using the credit you already have. When you want to apply for a new card, a car loan, or a mortgage, you simply “thaw” your report — either temporarily or permanently, and either for one specific lender or across the board — and that unfreezing is also free and usually takes effect within an hour when done online. Your existing credit cards, loans, and bank accounts keep working normally while the freeze is on. It is worth knowing the difference between a free federal freeze and the “credit lock” products some companies market: locks can do a similar job but are often tied to a paid subscription, whereas the statutory freeze is guaranteed free. If you are weighing the two, start with the free freeze and add a paid product only if it offers something you actually need.
Layer it with free alerts and free reports
A freeze pairs well with two other no-cost protections. You can place a free fraud alert with one bureau — which must then notify the other two — telling lenders to take extra steps to verify your identity before extending credit; a standard alert lasts one year and can be renewed, and identity-theft victims can get an extended alert. You are also entitled to free credit reports at AnnualCreditReport.com, the only federally authorized source, so you can check for accounts you do not recognize. Used together, a freeze on all three bureaus, a fraud alert, and regular report checks form a simple, repeatable routine that costs nothing and shuts down the new-account fraud that does the most financial damage. If you have ever been part of a data breach — and most people have — turning the freeze on today is the single highest-value hour you can spend protecting your money.
This article was produced with AI assistance and reviewed by a human editor. Figures are linked to their primary sources; where a claim could not be verified from the public record, we say so.
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