The Federal Reserve publishes the average rate on US credit cards every quarter in its G.19 statistical release. As of the most recent reading we tracked, the average rate on accounts assessed interest sits at roughly 21.5%. That figure is the honest baseline against which any “low interest” claim should be measured.
We treat ongoing variable APRs starting under 16% as genuinely low for a major bank product, and starting under 12% as exceptional (almost always a credit union). Cards that advertise a sub-16% lower bound but a 28%+ upper bound get flagged: most applicants statistically land closer to the upper bound.
Intro 0% offers are evaluated separately. Their value depends entirely on whether you can clear the balance inside the promo window, including the upfront balance transfer fee. We don’t double-count an intro period as a substitute for a low ongoing rate.
Sources we lean on: the Federal Reserve G.19 release, the New York Fed’s quarterly Household Debt and Credit report, the Consumer Financial Protection Bureau’s biennial credit card market report, and each issuer’s published Schumer Box. Where we describe consumer protections (no penalty APR, limits on rate increases, the 21-day grace period) the underlying rule is the CARD Act of 2009 and Regulation Z.