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If you only need a small amount, credit card companies will sometimes provide an increased credit limit (for accounts already opened). While a request for an increased limit may count as an inquiry just like opening a new card would, it won’t reduce the average age of your credit accounts, which is also important to your FICO® Scores.
If getting the limit raised on an existing card isn’t an option, then applying for the fewest number of credit cards will have the least negative impact to your FICO® Scores. For example, if a person needed an extra $5,000, getting one card with a $5,000 limit rather than two cards each with a $2,500 limit results in less impact to your scores. That’s because when applying for new credit cards, each application is counted separately as an individual inquiry in your credit file, and the more inquiries you have, the more that could hurt your FICO® Scores. Historically, people with six inquiries or more in their credit files are eight times more likely to declare bankruptcy than people with no inquiries in their files. So having more inquiries makes you look more risky to potential lenders.