High-Yield Savings Yield Calculator
Calculate exactly how much your high-yield savings account will earn after taxes. See daily compounding, monthly contributions, and a year-by-year projection over 5 years.
Year-by-Year Projection
How High-Yield Savings Account APY Works
Annual Percentage Yield (APY) reflects the actual yearly return when interest compounds. Most HYSAs compound daily and credit interest monthly. The APY differs from the simple annual rate (APR) — for example, a 4.40% APR with daily compounding produces a 4.50% APY. The Federal Truth in Savings Act requires banks to disclose APY in any savings account advertising, allowing apples-to-apples comparison (source: 12 CFR 1030.4, Regulation DD). HYSAs are FDIC-insured up to $250,000 per depositor per insured bank.
2026 HYSA Rate Outlook
HYSA rates closely follow the federal funds rate. After the Fed cut rates 4 times during 2024-2025, the federal funds rate sits at 4.00-4.25% in early 2026 and HYSA APYs run 3.75-4.75% at top online banks. Online-only banks (Ally, Marcus by Goldman Sachs, Discover, SoFi, Capital One 360) consistently offer 0.50-1.00% higher APYs than traditional brick-and-mortar banks because they don't pay for branches. Traditional bank savings accounts often pay 0.01-0.10% APY — switching to an online HYSA on a $20,000 balance saves $800-$900 per year in lost interest (source: FDIC National Rates and Rate Caps, fdic.gov).
HYSA Tax Treatment
Interest from HYSAs is taxable as ordinary income at the federal level — taxed at your marginal rate (10% to 37%). State tax also applies in most states. Banks issue Form 1099-INT for interest over $10. Strategy: hold HYSA balances inside a Roth IRA where possible to make the interest tax-free; outside an IRA, accept the tax cost as the price of liquidity. Compared to brokerage money market funds (similar yields, also taxable) or Treasury bills (state-tax-exempt — better for high-tax states), HYSAs win on simplicity and FDIC insurance. For amounts above $250,000 per bank, spread across multiple banks to maintain full FDIC coverage.
HYSA vs Money Market vs CD vs Treasury
HYSA: variable rate, fully liquid, FDIC-insured to $250K. Money Market Account: similar but may offer check-writing. Money Market Fund (brokerage): slightly higher yield often, NOT FDIC but very safe (SIPC-protected, holds short-term Treasuries). CD: locked rate but locked term with early-withdrawal penalty. T-Bill: locked rate, full liquidity via secondary market, state-tax exempt. For pure emergency funds, HYSA is best because it combines high yield, full liquidity, and FDIC safety. For amounts above $250K, mix HYSA with T-Bills. Last updated: April 2026.
Frequently Asked Questions
What's the best HYSA rate in 2026?
Top online HYSAs offer 4.25-4.75% APY in early 2026. Marcus by Goldman Sachs, SoFi, Ally, Capital One 360, Synchrony, and Discover compete closely. Always check current rates — they change weekly with Fed policy (source: fdic.gov).
How does daily compounding work on a HYSA?
With daily compounding, your previous day's interest earns interest the next day. The formula: Final = Principal × (1 + rate/365)^(days). On a $10,000 balance at 4.50% APY for 1 year, daily compounding produces $460 vs simple interest's $450 — a $10 advantage that grows with larger balances and longer periods.
Are HYSA interest earnings taxable?
Yes. HYSA interest is taxed as ordinary income at your federal marginal rate plus state income tax. Banks issue Form 1099-INT for interest over $10. Hold HYSA inside a Roth IRA to avoid the tax.
Is my HYSA money safe?
Yes — FDIC insurance protects deposits up to $250,000 per depositor per insured bank per ownership category. For larger balances, spread across multiple banks or use joint accounts to multiply coverage. Online-only banks have identical FDIC protection as brick-and-mortar banks.
Can I withdraw from an HYSA anytime?
Yes. HYSAs offer full liquidity. Most online HYSAs allow unlimited transfers to your linked checking account, with funds typically available 1-3 business days later. Some banks impose Regulation D-style monthly withdrawal limits (was 6/month, suspended in 2020 but some banks kept the limit).
HYSA vs Money Market — which is better?
They're often similar in yield (within 0.10% APY). Money Market Accounts may offer check-writing or debit card access, while HYSAs typically don't. Brokerage Money Market Funds (different product) often yield slightly higher but lack FDIC insurance — they're SIPC-protected and hold short-term Treasury bills.
Should I keep my emergency fund in a HYSA?
Yes — HYSAs are ideal for emergency funds. They offer 4-5% returns (vs 0.01% at brick-and-mortar banks), are FDIC-insured, fully liquid, and have no early-withdrawal penalties. Keep 3-6 months of expenses in an HYSA, then move excess to higher-return investments.