HYSA Calculator
HYSA stands for High Yield Savings Account — and this calculator shows exactly how much interest yours earns, month by month. Compare your rate against major online banks, see your monthly interest income, and find out what a better rate would actually pay you. Instant, private, free.
✓ Monthly Interest Breakdown · ✓ Bank Rate Comparison · ✓ Instant & Offline💸 HYSA Interest Calculator
🔧 JS ⏳ · Input — · Result — · Engine ⏳
📅 Month-by-Month Interest
| Month | Interest earned | Balance |
|---|
🔀 Bank Rate Comparison — same balance, same months
What Does HYSA Stand For?
HYSA stands for High Yield Savings Account — a savings account that pays significantly more interest than a traditional bank account. Where a big-bank savings account pays around 0.01% APY, an HYSA at an online bank pays roughly 4–5% APY (rates move with the Federal Reserve). Same FDIC insurance, same deposit protections — 40 to 400 times the interest on identical balances. The reason online banks can pay more: no branch network means lower overhead, and they pass the savings to depositors to attract money electronically.
The trade-offs are minor for most savers: transfers take 1–3 business days, there are no physical branches, and the rate is variable (it follows the Fed). For an emergency fund or any cash you want safe, liquid and earning — the HYSA is the standard recommendation.
Popular HYSA Banks — Recent Rate Ranges
| Bank | Recent APY range | Known for |
|---|---|---|
| SoFi | ~3.8–4.6% | Direct deposit boost, all-in-one app |
| Marcus (Goldman Sachs) | ~3.7–4.4% | No minimum, simple structure |
| Capital One 360 Performance | ~3.6–4.3% | Established brand, no fees |
| American Express Personal Savings | ~3.6–4.3% | Amex ecosystem integration |
| CIT Bank Platinum Savings | ~4.5–4.7% | High tier for $5,000+ balances |
| Typical big-bank savings | ~0.01–0.1% | The baseline you're escaping |
Rates shown are recent ranges for orientation — HYSA rates are variable and change with Federal Reserve decisions. Always check the bank's current published APY before opening an account, and confirm FDIC insurance (NCUA for credit unions).
Why Use This HYSA Interest Calculator?
Month-by-Month
See each month's interest payment — your savings income in real dollars per month.
Bank Rate Shopping
Your rate against major online banks at once — quantify the switch before moving money.
Monthly Deposits
Add recurring deposits and watch interest accelerate as the balance compounds.
100% Private
Balances and rates stay in your browser — no bank sees your numbers from here.
Instant & Offline
Pure browser math on every keystroke — unlimited scenarios, no account.
Free Forever
No limits, no watermarks, no premium tier — a calculator that's just a calculator.
Popular Use Cases
- 💵 See how much monthly interest your emergency fund generates
- 🏦 Compare your current HYSA rate against other online banks before switching
- 📈 Project savings growth over 3–36 months with ongoing deposits
- 🎓 Learn what "4.5% APY compounded monthly" means in real dollars
- 🛒 Plan a purchase fund — car, down payment, big trip
- 🧾 Track passive interest income for budgeting and FIRE planning
Pro Tips for HYSA Banking
- HYSA rates follow the Fed: they rise and fall with Federal Reserve decisions — unlike CD rates, which lock. Model a 1%-lower scenario before assuming today's rate holds.
- Interest is taxable income: your HYSA sends a 1099-INT each year; the interest shown here is pre-tax. Subtract your marginal rate for the after-tax picture.
- Monthly compounding is standard: this calculator compounds monthly like most online banks — daily-compounding accounts earn pennies more per year, rarely decisive.
- Watch for rate tiers: some banks (like CIT Platinum) pay higher rates above a balance threshold — check whether your balance crosses one.
- Emergency fund first: 3–6 months of expenses in the HYSA is the classic foundation — liquid, safe, and finally earning its keep. Then consider CDs or investing for money with a longer horizon.
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