Building credit history shows that you can borrow money and pay it back responsibly—even if you prefer using cash for everyday purchases.
In the U.S., when you pay with cash or debit, those payments are not reported to credit bureaus—so you're not building a credit history.
Without credit history, lenders, landlords, and others may have no way to know if you're reliable with payments. This can make it harder to:
Rent an apartment
Get approved for a car loan or mortgage
Qualify for a credit card
Set up utilities or a cell phone plan without a deposit