Quick answer
$500 extra each month is “pay it off fast” territory. It can wipe out balances quickly — just make sure it fits your budget.
Run the calculator (pre-filled)
Open the payoff calculator with $500 extra already filled in.
Why extra payments work so well
Five hundred extra dollars is a payoff sprint, not a tweak. On $6,000 at 22% APR the estimated minimum is $170. Adding $500 brings the monthly total to $670 — a little over 11% of the starting balance — so you are treating a revolving card almost like a short installment loan you designed yourself. The first month’s $110 of interest is a small slice of a $670 payment; roughly $560 hits principal immediately.
Same monthly-interest engine as the rest of these tools: the $170 minimum takes 58 months (4 years 10 months) and $3,745.71 in interest. At $670 a month the $6,000 balance is gone in 10 months with $614.67 in interest. That is 48 months faster and $3,131.04 less interest. You will send about $5,000 of extra principal over those 10 months; in return you skip nearly four years of 22% revolving charges.
This extra size fits someone with disposable income they can park for a defined window — a bonus, a stretch of overtime, a paid-off car, or a household that already funds an emergency account and still has surplus. It is a poor fit if the $500 only appears if you skip rent or drain the last of savings. Aggressive payoff should have an end date. Ten months on this example is short enough that you can treat it as a project: calendar the due date, automate $670, and plan what that $500 will do after the card hits $0 (rebuild cash, then invest).
Because the extra is large relative to the balance, utilization drops fast, which can matter if you will apply for a mortgage or auto loan in the next year. The tradeoff is opportunity cost: $500 a month in a brokerage account can grow, but it does not erase a 22% APR. A guaranteed 22% “return” by paying the card usually beats an uncertain market return over a 10-month horizon, with the exception of capturing an employer 401(k) match (that is free money) and keeping a cash floor so the card is not reopened by the next emergency.
After month 10, cancel the $670 autopay or you may start carrying new purchases at 22% out of habit. If the card has an annual fee, downgrade to a no-fee version once the balance is $0 rather than closing it if you still want the limit for utilization. The $500 that was extra principal can then fill three to six months of expenses before it becomes an investment contribution. The $614.67 of interest on this sprint is the cost of using the card as a 10-month loan; stretching the same $6,000 at the $170 minimum would have cost $3,745.71 — more than six times as much — over 58 months.
Should I invest this instead of paying down debt faster?
On this $6,000 / 22% example, routing $500 extra to the card instead of the minimum cuts interest from $3,745.71 to $614.67 and ends revolving debt in 10 months. A diversified investment might average high-single or low-double-digit returns over decades — and it might lose money this year. Beating a 22% APR with investments, after tax, in a 10-month window is not a plan you can count on. Exceptions: contribute enough to get a full employer match; do not empty a starter emergency fund; and if the APR were a 0% promo with a clear payoff date, investing leftover cash can make sense until the promo ends. After the card is at $0, the same $500 can move to investing without the 22% headwind.