How many credit cards is too many? See how you stack up against the American average — plus 3 straightforward signs you’re packing too much plastic

And don’t forget that credit utilization is a key factor in the credit scoring formula, which means having multiple cards can help improve your credit score by giving you more credit to work with.

However, you can definitely have too much of a good thing when it comes to credit cards. In fact, having too many cards can cause big financial problems.

While the definition of “too many” varies consumer to consumer, you definitely have too many cards if any of the following are true.

You can't keep track of all your cards

If you don't know key details of every card you have, you’ve crossed into the territory of having too many. Specifically, you should know:

• The approximate balance you owe on each card at any given time
• What perks and bonus reward each card offers
• The due date when each card must be paid

If you have a hard time keeping track of your combined balances and due dates, you can get stuck in a cycle of late fees and added interest that cost you more than any rewards or perks you may be earning. Not to mention you may end up damaging your credit score in the process.

Having so many cards you need a spreadsheet to keep track of rewards programs also doesn't make sense. When it's so hard to keep track of which card to use in any given situation, you'll most likely choose the wrong one sometimes and lose out on points, miles, or cash back that should be yours.

You can't earn enough rewards to redeem them

With many cards, redeeming rewards makes sense only if you have enough of them. For example, you'll usually get the best value with travel credit cards if you cash your points in for trips — but you'll need enough points to actually travel somewhere in order to do that.

If you have so many cards that you never get enough points to actually cash in your rewards, you have too many cards. You're better off reducing the number you use so your rewards balance can grow to the point that you can actually redeem.

You're paying annual fees for redundant benefits

There's nothing wrong with paying annual fees for a great credit card — if you're getting enough value to justify the cost.

However, if you have multiple cards that charge fees, you could find yourself paying out a combined amount that’s more than the cards are worth. That's especially true since many of the most expensive cards tend to offer similar benefits, such as airline lounge access or rental car insurance. You typically only need one card that provides these perks as you can't sit in two lounges at once.