The reason I ask is I continuous see in most credit repair articles to pay all balances off at the end of the month. Which is what my future father-in-law, and my mother do, and my future father-in-law was declined as a co-signer on a personal loan this past month. Small background, my future father-in-law has a personal net worth of over a million dollars, his home is paid for as well as both cars and wanted to co-sign for his nephew on a â??smallâ? $16,000 personal loan. They were decline and his nephew was told that his co-sign didnâ??t qualify. Why you ask, no payment basis. My future father-in-law just loan him the money which defeated the purpose, get the loan on his nephew credit history. So I have been pondering, should we always pay all balances off at the end month? I understand if we are young, re-establishing or repairing our credit I would agree wholeheartly pay those balances, keep that balance to credit line ratio low. But will it hurt us in the future when we are established?