If you have a balance of over 35 percent or more of total available credit limit on individual cards, this can hurt your credit, even if you make your regular payments. (secureloanconsolidation.com)
On - time - payments account for 35 % of your score, while credit utilization (debt divided by total available credit limits) accounts for 30 %. (fool.com)
The second issue is total available credit which can be a potential red flag for lenders. (stockmonkeys.com)