APY calculator
$10,000 in the average U.S. checking account earns $7 a year. Here’s what it earns with the ACK card.
Last updated:
| Earnings | Average checking (0.07%) | ACK card at 3% APY | ACK card at 4% APY |
|---|---|---|---|
| Per day | $0.02 | $0.81 | $1.07 |
| Per month | $0.58 | $24.66 | $32.74 |
| Per year | $7 | $300 | $400 |
With the ACK card you’d earn $293–$393 more a year.
Your entire balance earns 3–4% APY, every day. Examples assume the balance stays the same for the whole period.
National average: FDIC National Rates and Rate Caps, September 2026 (interest checking 0.07%).
At a glance
| Balance | Average checking (0.07%) | ACK card at 3% | ACK card at 4% |
|---|---|---|---|
| $10,000 | $7 a year | $300 | $400 |
| $15,000 | $10.50 a year | $450 | $600 |
How the calculator works
APY already includes compounding, so one year’s earnings are simply your balance × the APY. For a month we use balance × ((1 + APY)1/12 − 1), and for a day balance × ((1 + APY)1/365 − 1). What is APY?
Questions
How much is 4% APY on $10,000?
$400 a year, if the balance stays the same all year. At 3% APY it’s $300.
How much does $15,000 earn at 3–4% APY?
$450–$600 a year, if the balance stays the same all year.
How much does $10,000 earn in an average checking account?
About $7 a year, at the national average interest checking rate of 0.07% (FDIC, September 2026).