How would a collection of 230 affect a person with 50000 in available credit and 730 score?

Your credit score can be decreased by having collection accounts listed, a judgment, late payments or if you have too much available credit. If you have that much credit, you would want to contact the credit issuer to lower your credit limit. Your debt should never be more than 35% of the available credit. Timely, consistent payments to your creditors and low credit limits will help increase your credit score.