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What actions should I be taking to establish good credit scores for my children?
My son who is now 21 has never needed me to cosign on a loan for him and I did not need to establish any sort of credit rating for him to establish his own credit.  One thing I would suggest is ditch the bank and use a credit union. I have used one for many years and opened an account there for my son as soon as he got his first job. He was able to get a debit card to start which doesn't build credit score but establishes his account work the credit union. He was able to get his first credit card through the same credit union without falling work the bureaucratic BS that comes with dealing with a large bank. His interest rate may be a bit higher due to his lack of credit score initially but because we taught him about finance it isn't really relevant because he doesn't carry a balance. He has also been able to get a student loan without needing a cosigner so he can attend college.  The idea that one needs to have a credit score established before being an adult is a fallacy. Like my son, I started my credit on my own and have never needed a cosigner whether it was my first credit card at 17 (the credit union probably shouldn't have done that since i wasn't old enough to be legally bound), my first car at 18 or my first home at 22. For both my son and I, knowing how to use credit responsibly was far more valuable than having a credit score early. Before your children are 18 opening credit accounts with them as the primary account holder can be problematic because they aren't old enough to be legally liable for the debt. Using them as a cosigner is even more problematic for the same reason. Each financial institution will have their own rules and I certainly don't know them all.  For what you are proposing I would suggest a small line of credit with a credit union. Being small and locally controlled you will probably find that you have the best luck there.