High-Yield Savings Calculator (HYSA)

A high-yield savings account (HYSA) pays 4.5–5.25% APY in today's rate environment — compared to 0.62% for the national average savings account and 0.08% for a typical checking account. This High-Yield Savings Calculator shows your HYSA balance over time with daily compounding, tax drag on your inte...

HYSA CALCULATOR

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Top HYSAs 2025: 4.5–5.25% · Nat. avg: 0.62%

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Most HYSAs compound daily

HYSA interest is taxed as ordinary income each year

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US 10-yr avg inflation: ~3.0% · Recent CPI: 2.5–3.5%

FINAL BALANCE

$40,223.28

INTEREST EARNED

$3,223.28

EFF. APY

5.130%

AFTER-TAX INT.

$2,514.16

REAL BALANCE

$37,914.30

GROWTH CHART

BALANCE AFTER 2 YEARS

$40,223.28

INTEREST EARNED

$3,223.28

EFF. APY

5.130%

AFTER-TAX BAL.

$39,514.16

BALANCE GROWTH · NOMINAL vs AFTER-TAX vs REAL

Yr 1
$32,421.40
Yr 2
$40,223.28
Nominal balance
Real (inflation-adj.)

FINAL BALANCE COMPOSITION

PRINCIPAL
CONTRIB.

MONTHLY INT. (YR 1)

$118.45

TAX DRAG

$709.12

REAL BALANCE

$37,914.30

PURCHASING PWR LOSS

$2,308.98

Live chart · updates as you type

Created with❤️byeaglecalculator.com

RATE COMPARISON: YOUR HYSA vs ALTERNATIVES

$25,000 INITIAL + $500/MONTH OVER 2 YEARS
ACCOUNT TYPEAPYINTEREST EARNEDFINAL BALANCEvs YOUR HYSA
Top HYSA rate ← yours5.00%$3,223.28$40,223.28
Avg HYSA rate4.50%$2,887.21$39,887.21−$336.07
Nat. avg savings0.62%$383.52$37,383.52−$2,839.76
Checking account0.08%$49.24$37,049.24−$3,174.04

Comparison uses daily compounding, no tax deduction applied. Rates are illustrative (2025). Actual rates vary.

YEAR-BY-YEAR BREAKDOWN

HYSA SCHEDULE — 2 YEARS @ 5% APR · 22% TAX RATE
YEAROPENINGCONTRIB.GROSS INT.TAX PAIDNET INT.CLOSINGREAL VALUE
Year 1$25,000.00$6,000.00$1,421.40$312.71$1,108.69$32,421.40$31,477.09
Year 2$32,421.40$6,000.00$1,801.88$396.41$1,405.46$40,223.28$37,914.30
TOTAL$12,000.00$3,223.28$709.12$2,514.16$40,223.28$37,914.30

HOW TO USE

  1. 1

    Enter your initial deposit — the amount you will open the HYSA with. Many HYSAs have no minimum deposit requirement.

  2. 2

    Enter the HYSA annual rate (APR). Top HYSA rates in 2025 range from 4.5% to 5.25%. Check your specific bank's current rate — rates change frequently with Federal Reserve decisions.

  3. 3

    Enter the time period in years. Use decimals for partial years (0.5 = 6 months).

  4. 4

    Enter a monthly contribution if you plan to add money regularly. Many HYSA holders set up automatic monthly transfers from their checking account.

  5. 5

    Select your income tax rate. HYSA interest is taxed as ordinary income each year — this is the tax drag calculation. If your HYSA is inside a Roth IRA, select 0%.

  6. 6

    Enter the inflation rate to see your real (purchasing-power-adjusted) return. The calculator shows both the nominal balance and the inflation-adjusted balance — the difference is your purchasing power loss to inflation.

  7. 7

    The rate comparison table below shows what the same deposit earns at different savings rates — making it easy to quantify the benefit of a HYSA vs a regular savings account.

WORKED EXAMPLE

Example: $25,000 initial deposit, 5.00% APR, daily compounding, 2 years, $500/month contributions, 22% tax rate, 3.0% inflation. Effective monthly rate: (1+0.05/365)^(365/12)−1 = 0.4176%/month. Final balance: $40,220 approx. Total contributed: $37,000 ($25,000 + $500×24). Total interest: ~$3,220. Tax drag at 22%: ~$708. After-tax interest: ~$2,512. Inflation-adjusted real balance at 3% CPI: ~$37,940 (purchasing power). Comparison: same deposit in a 0.62% savings account earns only ~$400 in interest — HYSA earns ~$2,820 more.

REFERENCE FORMULAS

FORMULA REFERENCE TABLE
NAMEFORMULADESCRIPTION
Compound InterestA = P × (1 + r/n)^(nt)P = principal, r = APR, n = compounding freq., t = years
Effective Monthlyi_m = (1 + r/n)^(n/12) − 1Effective monthly rate from any compounding frequency
Effective APYAPY = (1 + APR/365)^365 − 1True annual yield from daily compounding
Tax DragTax Drag = Annual Interest × Marginal Tax RateInterest income lost to tax each year — reduces effective yield
After-Tax YieldAfter-Tax APY = APY × (1 − Tax Rate)Net yield after income tax on HYSA interest
Real ReturnReal Return = [(1 + Nominal Rate) ÷ (1 + Inflation)] − 1Inflation-adjusted return — may be negative if inflation exceeds HYSA rate
Real BalanceReal Balance = Nominal Balance ÷ (1 + Inflation Rate)^YearsFinal balance in today's purchasing power dollars

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Disclaimer: This calculator is for informational purposes only. HYSA rates change frequently and the rates shown in the comparison table are illustrative. FDIC insures deposits up to $250,000 per depositor per institution. This is not financial advice.

Last updated: April 29, 2026 · Formula verified by EagleCalculator team · Eagle-eyed accuracy for every calculation.