High-Yield Savings (HYSA) Calculator
Estimate how your balance can grow in a high-yield savings account (HYSA) using compound interest. Adjust starting balance, annual percentage yield (APY), timeline, and recurring deposits to compare scenarios. Advanced options (changing APY over time, withdrawals, tiered rates, side-by-side yield comparisons) are optional—everything on this page is free to use. Results are nominal (taxes and inflation are not modeled).
Calculator
Savings projection
Set your balance, APY, timeline, and how often you add money. Results are nominal (no tax or inflation adjustment).
Principal in the account at the start of the projection.
Nominal annual percentage yield.
APY is treated as effective annual yield for this compounding cadence.
Results
Ending balance
$45,935
Total contributions
$24,200
Interest earned
$11,735
Total withdrawals
$0
Fees (modeled)
$0
Assumptions
- Compounding: monthly (APY interpreted as effective annual yield for that cadence).
- Deposits and withdrawals are applied after the compound event on compound days; daily mode compounds every day.
- Weekly/biweekly cadence is anchored to the start date (every 7 or 14 days).
- Nominal balances only—taxes and inflation are not modeled.
| Year | Interest | Contributions | Withdrawals | Fees | End balance |
|---|---|---|---|---|---|
| 2026 | $369 | $1,800 | $0 | $0 | $12,169 |
| 2027 | $606 | $2,400 | $0 | $0 | $15,175 |
| 2028 | $741 | $2,400 | $0 | $0 | $18,316 |
| 2029 | $882 | $2,400 | $0 | $0 | $21,598 |
| 2030 | $1,030 | $2,400 | $0 | $0 | $25,028 |
| 2031 | $1,184 | $2,400 | $0 | $0 | $28,612 |
| 2032 | $1,346 | $2,400 | $0 | $0 | $32,358 |
| 2033 | $1,514 | $2,400 | $0 | $0 | $36,272 |
| 2034 | $1,690 | $2,400 | $0 | $0 | $40,363 |
| 2035 | $1,874 | $2,400 | $0 | $0 | $44,637 |
| 2036 | $498 | $800 | $0 | $0 | $45,935 |
Frequently asked questions
- What is APY?
- Annual Percentage Yield (APY) is the effective yearly rate that includes compound interest. It reflects what you actually earn over a year if interest compounds.
- How is monthly compounding modeled?
- This calculator assumes interest compounds monthly, which is common for many savings products. Your bank’s actual compounding schedule may differ slightly.
- Is this financial advice?
- No. SmartFinanceNerd provides educational estimates. Always verify rates and terms with your institution.