It's one of the most common money questions there is, and most advice picks a side too fast. Here's the actual tradeoff — and the middle path most people land on once they see the real numbers.
Go all-in on debt with nothing set aside, and the next flat tire, medical bill, or job gap becomes new debt — often at a worse rate than what you just paid off. Go all-in on a cushion while carrying a high-interest balance, and you're paying double-digit interest on the card while earning a fraction of that on the savings sitting next to it. Both extremes cost you money in a different way.
Build a small starter cushion first — often described as one month of essential expenses, or roughly $1,000-$2,000 for a steady-income household. It's not meant to survive a real emergency on its own. It's meant to stop a small surprise from turning into new debt while you do the real work of paying down what you owe.
The higher the rate on the debt, the stronger the case for attacking it once the starter cushion exists. A credit card at 22% is effectively guaranteed to cost you more than almost any return you'd get leaving that money in savings instead — the math isn't close. A 4-5% student loan or a fixed-rate mortgage is a much weaker case for urgency, and building the cushion or investing may make more sense in parallel.
This is exactly the kind of decision that looks different once you plug in your own numbers instead of a generic rule of thumb.
General education, not financial advice. Everyone's income, debt, and risk tolerance are different. Zowly is a financial calculation and education tool, not a licensed advisor.