An extra $500 a month gives you a useful financial decision to make: where can that money do the most work? That choice looks different if a credit card balance is growing, an emergency fund barely exists, or an employer offers a retirement match.
The answer also does not have to involve picking one account and sending every dollar there forever. A smart plan can change as your financial situation changes. The goal involves giving each $500 assignment a job instead of letting it disappear into the checking account.