How much interest does $10,000 earn in a savings account?

At the FDIC national average of 0.41% APY, $10,000 earns $41 per year. At the best online bank rate of 4.50% APY, $10,000 earns $450 per year. At 4.75% APY (the top rate available in 2026), $10,000 earns $475 per year. The difference between the big-bank rate (0.01%) and the best online rate (4.75%) is $474 per year on a $10,000 balance.

How much interest does $1,000 earn in a year?

At 4.50% APY, $1,000 earns $45 in one year. At the national average of 0.41% APY, $1,000 earns $4.10 per year. At the big-bank rate of 0.01%, $1,000 earns exactly $0.10 per year. Moving $1,000 from a 0.01% account to a 4.50% HYSA earns an extra $44.90 annually.

How much interest does $100,000 earn in a year?

At 4.50% APY, $100,000 earns $4,500 in one year. At the national average of 0.41%, $100,000 earns $410 per year. At 0.01% (big-bank rate), $100,000 earns $100 per year. The difference between 0.01% and 4.50% on $100,000 is $4,400 per year — enough to pay several months of expenses in many households.

Does interest compound in a savings account?

Yes. Most savings accounts and CDs compound interest daily or monthly. Daily compounding means each day's interest is added to the principal, and the next day's interest is calculated on the slightly larger balance. APY (Annual Percentage Yield) already accounts for compounding, so you can use APY directly for annual estimates: Interest = Balance × APY.

How long does it take to double money in a savings account?

At 4.50% APY, money doubles in approximately 16 years using the Rule of 72 (72 ÷ 4.50 = 16 years). At 0.41% APY (national average), money doubles in approximately 176 years. At 0.01% APY (big-bank rate), money doubles in 7,200 years. This illustrates why the account you choose matters enormously over time.

Is savings account interest taxable?

Yes. Savings account interest is taxable as ordinary income in the year it is earned, at your marginal federal income tax rate. Banks report interest of $10 or more to the IRS on Form 1099-INT. State income tax also applies in most states. Interest earned inside a Roth IRA or traditional IRA grows tax-free or tax-deferred, respectively.

How Much Interest Can $100, $1,000, or $10,000 Earn in 2026?

How Much Interest Can Your Savings Earn in 2026?

At 4.50% APY — the rate available at most online banks in 2026 — your money earns:

$100 → $4.50 per year
$1,000 → $45 per year
$10,000 → $450 per year
$100,000 → $4,500 per year

At 0.01% APY (what Chase, Bank of America, and Wells Fargo pay on standard savings):

$10,000 → $1.00 per year
$100,000 → $10.00 per year

The account you choose determines almost everything.

Interest Earned by Balance and Rate — Annual Table

Balance	At 0.01% (Big Bank)	At 0.41% (National Avg)	At 4.50% (Online Bank)	At 4.75% (Top Rate)
$100	$0.01	$0.41	$4.50	$4.75
$500	$0.05	$2.05	$22.50	$23.75
$1,000	$0.10	$4.10	$45.00	$47.50
$2,500	$0.25	$10.25	$112.50	$118.75
$5,000	$0.50	$20.50	$225.00	$237.50
$10,000	$1.00	$41.00	$450.00	$475.00
$25,000	$2.50	$102.50	$1,125.00	$1,187.50
$50,000	$5.00	$205.00	$2,250.00	$2,375.00
$100,000	$10.00	$410.00	$4,500.00	$4,750.00
$250,000	$25.00	$1,025.00	$11,250.00	$11,875.00

Annual interest estimates using simple APY calculation: Balance × APY. Actual interest may vary with compounding frequency.

Interest Earned Over Time at 4.50% APY

Compound interest grows your balance faster over time. Here’s what $10,000 grows to at 4.50% APY compounded daily:

Years	Balance	Total Interest Earned
1	$10,460	$460
2	$10,941	$941
3	$11,443	$1,443
5	$12,523	$2,523
10	$15,683	$5,683
20	$24,596	$14,596

Based on 4.50% APY compounded daily, no withdrawals, no rate changes.

Interest by Account Type (Same $10,000)

Account Type	APY	Annual Interest on $10,000
Big-bank savings	0.01%	$1
National average savings	0.41%	$41
High-yield savings (online)	4.50%	$450
Money market (online)	4.60%	$460
1-year CD (online)	4.75%	$475
5-year CD (online)	4.10%	$410/year
Treasury bill (6-month)	4.40%	$220 per 6 months
I Bond (current rate)	~3.10%	$310

How Bank Interest Is Calculated

Most savings accounts use daily compounding, which means:

The bank divides your APY by 365 to get the daily rate
Each day, it multiplies your balance by that daily rate to calculate interest earned
That interest is added to your balance
The next day’s interest is calculated on the slightly larger balance

Example — $10,000 at 4.50% APY, compounded daily:

Daily rate: 4.50% ÷ 365 = 0.01233%
Day 1 interest: $10,000 × 0.0001233 = $1.23
Day 2 interest: $10,001.23 × 0.0001233 = $1.23 (slightly more)
After 365 days: $10,460.16

The APY already accounts for compounding, so for a quick estimate: Annual interest ≈ Balance × APY.

What About CD Interest?

CDs pay a fixed APY for a set term. Interest may compound daily and be credited monthly, or credited at maturity, depending on the bank and term.

Example — $10,000 in a 1-year CD at 4.75% APY:

At maturity (12 months): $10,475 principal + interest = $10,486.35 with daily compounding (slight difference due to compounding)

Multi-year CDs compound year over year:

$10,000 in a 5-year CD at 4.10% APY:
- Year 1: $10,410
- Year 2: $10,836
- Year 3: $11,280
- Year 4: $11,742
- Year 5 (maturity): $12,224 — total interest: $2,224

Tax on Savings Interest

Savings account interest is taxable as ordinary income. The bank reports annual interest on Form 1099-INT.

Example — $10,000 at 4.50% APY:

Interest earned: $450
Tax owed (22% federal bracket): $99
After-tax interest: $351
After-tax effective yield: 3.51%

To reduce tax on interest:

Hold savings in a Roth IRA (tax-free growth on qualifying withdrawals)
Hold savings in a traditional IRA (tax-deferred growth)
Consider Treasury bills, which are exempt from state income tax in all 50 states
See: Paying Tax on CD Interest 2026

Where to Earn the Most Interest in 2026

Best for fully liquid savings:

High-Yield Savings Accounts — 4.35–4.75% APY, access anytime

Best for money you can lock up for 6–24 months:

CD Rates 2026 — 4.25–4.75% APY, fixed rate, fixed term

Best for state-tax reduction:

Treasury bills — 4.20–4.50% APY, state-tax exempt

Best for inflation protection:

I Bonds — inflation-adjusted rate, $10,000/year limit

Average Bank Interest Rates 2026 — current rates by account type
Best High-Yield Savings Accounts 2026 — top online rates
Best CD Rates 2026 — highest APYs by term
4 Ways to Earn More Interest on Savings — full strategies
Banking Basics Hub — how banks work

Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.

The content on Wealthvieu is for informational purposes only and should not be considered financial, tax, or investment advice. Consult a qualified professional before making financial decisions. Full disclaimer · Editorial policy