Per day · per month · per year

How much interest will I earn?

Interest earned in a year is roughly balance × APY. $10,000 at 4% APY earns $400 a year, about $32.74 a month; at the FDIC national average savings rate of 0.38% it earns $38.00 a year.

Interest Calculators editorial teamUpdated 4 sources

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Interest you will earn

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$10,000 at 4.00% APY earns about $32.74 a month and $400.00 a year.

Per year$400.00
Per month$32.74
Per day$1.07
After 5 years$2,166.53compounded

Earning $1,000 a month at this APY takes a balance of about $300,000.

Formula. Per year = balance × APY. Per month = balance × [(1 + APY)1/12 − 1]. Per day = balance × [(1 + APY)1/365 − 1]. Over several years = balance × [(1 + APY)years − 1].

Interest per year at different APYs

Yearly interest is balance × APY, because the APY already includes compounding within the year.[2] The first column is the FDIC national average savings rate, 0.38% (published October 19, 2026).[1]

Interest earned in one year
Balance0.38% (avg.)1%2%3%4%5%
$1,000$3.80$10.00$20.00$30.00$40.00$50.00
$5,000$19.00$50.00$100.00$150.00$200.00$250.00
$10,000$38.00$100.00$200.00$300.00$400.00$500.00
$25,000$95.00$250.00$500.00$750.00$1,000.00$1,250.00
$50,000$190.00$500.00$1,000.00$1,500.00$2,000.00$2,500.00
$100,000$380$1,000$2,000$3,000$4,000$5,000
$250,000$950$2,500$5,000$7,500$10,000$12,500
$500,000$1,900$5,000$10,000$15,000$20,000$25,000
$1,000,000$3,800$10,000$20,000$30,000$40,000$50,000

The national average includes large banks that pay very little, so it understates what a competitive account pays. The high-yield savings calculator turns the gap into dollars over several years.

Interest per month and per day

Monthly interest is a little less than one-twelfth of the yearly figure, because each month's interest itself earns interest later in the year. At 4% APY:

At 4.00% APY
BalancePer dayPer monthPer year
$1,000$0.11$3.27$40
$5,000$0.54$16.37$200
$10,000$1.07$32.74$400
$25,000$2.69$81.84$1,000
$50,000$5.37$163.69$2,000
$100,000$10.75$327.37$4,000
$250,000$26.86$818.43$10,000
$500,000$53.73$1,636.87$20,000
$1,000,000$107.46$3,273.74$40,000

How much interest does $1 million earn?

$1,000,000 earns $40,000 a year at 4% APY, about $3,274 a month, and $3,800 at the 0.38% national average. Above $250,000, though, part of the balance may be uninsured: FDIC insurance covers $250,000 per depositor, per insured bank, for each account ownership category.[3] Large balances are often split across banks or ownership categories, or held in Treasury bills; see the T-bill calculator.

Interest over several years

Left in the account, interest compounds. $10,000 at 4% APY earns $400 in the first year but $2,166.53 over 5 years, not $2,000. The calculator's "Years kept" box shows the compounded total; for regular deposits use the savings calculator, and for a CD's fixed term, the CD calculator. Stock dividends are a different kind of income, with no fixed rate; the dividend calculator projects them.

Interest is taxableSavings interest is taxed as ordinary income in the year it is credited, and banks send Form 1099-INT.[4] Enter your tax rate to see what you keep.

Frequently asked questions

How much interest will I earn on $10,000?

About $400 a year at 4% APY ($32.74 a month), $100 at 1% and $38.00 at the 0.38% national average.

How much interest does $100,000 earn per month?

About $327 a month at 4% APY and $407 at 5%.

How much interest does $1 million earn a year?

$40,000 at 4% APY, $50,000 at 5%. Check deposit insurance: the FDIC covers $250,000 per depositor, per bank, per ownership category.

Is interest paid monthly?

Most savings accounts credit interest monthly, even when it compounds daily. CDs may pay monthly, quarterly or at maturity.

Sources

  1. National Rates and Rate Caps, October 2026 · Federal Deposit Insurance Corporation, published October 19, 2026
  2. Appendix A to Part 1030 (Regulation DD), Annual Percentage Yield Calculation · eCFR, Consumer Financial Protection Bureau regulations, current as of November 1, 2026
  3. Understanding Deposit Insurance · Federal Deposit Insurance Corporation, updated April 1, 2024
  4. Topic no. 403, Interest received · Internal Revenue Service, reviewed October 7, 2026