A credit card can make a spending report look twice as expensive as real life. The purchases appear when you use the card. Then the bank payment appears as another expense when you settle the bill.
The problem is not the card. It is the decision to treat buying something and paying the resulting debt as two separate acts of consumption.
Record the purchase where it happens
Consider three card purchases of 90, 40 and 120. You have consumed 250 and created a card liability of 250, assuming there was no opening balance or other activity.
Paying 100 from your bank account reduces cash by 100 and the card balance owed by 100. It does not create another 100 of groceries, travel or clothing. The liability remaining is 150.
This treatment keeps spending tied to purchases while still showing that the repayment affects the cash available in the bank.
Separate financing costs from repayment
Now suppose the card statement adds interest of 12 and a fee of 3. Those are additional costs. The balance becomes 165, and a payment of 165 clears it.
Across the example, purchases were 250 and financing-related costs were 15. Total consumption and costs were 265, not 530. The payments explain how the liability was settled, not another round of purchases.
Do not assume that every line on a card statement is a purchase. Refunds, balance adjustments, cash advances, fees and repayments can all require different treatment.
Keep a cash view as well as a spending view
Avoiding double counting does not mean ignoring the payment date. A household can have reasonable spending and still lack enough bank cash when the card payment is due.
Use the spending view to understand what was bought. Use the dated cash plan to understand what must leave the bank account and when. The CFPB's toolkit includes tools for tracking spending and organizing cash flow because these are related but different tasks. Consumer Financial Protection Bureau
If the repayment is already included in the cash forecast, do not subtract the same purchases again from that bank account's future cash. Otherwise, the forecast will repeat the same mistake in a different place.
Be consistent about opening balances
A card balance that existed before your tracking start date belongs in the opening position. Importing the earlier purchases as well as that complete opening liability can overstate what is owed.
Choose a clear cutoff. Reconcile the balance at that date, then bring in later activity. For a mixed history, check that each purchase appears once and that each repayment connects the bank movement to the card liability.
Before trusting a monthly report, compare the closing card balance with the statement. Then inspect the household spending total. Both should be explainable without a balancing transaction invented simply to make the numbers agree.