Savings Calculator Online

How to Use the Savings Calculator

1. Pick a Mode: Choose Future value to project what your savings will be worth after a given number of years, or Monthly needed to back-solve the deposit required to hit a target balance by a specific date.
2. Enter Starting Balance and Monthly Deposit: Type your Starting balance ($) (the lump sum you have today — can be 0) and your Monthly deposit ($) in Future-value mode, or your Target balance ($) in Monthly-needed mode. The calculator runs the math live as you type.
3. Set APY and Years: Enter the account's APY (%) — the advertised annual percentage yield from your bank, already net of compounding — and the number of Years you plan to keep saving (1 to 100). For a current high-yield savings account, 3.5%-4.1% APY is a reasonable input for May 2026.
4. Read the Results: The right panel shows Future value, Total contributed (your money in), and Interest earned (the bank's contribution). Everything runs in your browser session — no account, no email, no tracking.

Why Project Your Savings?

The difference between guessing and modelling your savings is the difference between hoping you'll have enough for a down payment, college, or retirement and knowing exactly when you'll cross the line. Compound interest is famously hard to estimate by intuition — a $250/month deposit at 5% APY for 30 years grows to about $208,000, not the $90,000 you'd get from simple multiplication. Typical scenarios this calculator answers:

• Emergency fund timeline — Most financial planners suggest 3-6 months of expenses in a high-yield savings account. Modelling $400/month at 4% APY tells you when you'll hit a $15,000 target (~3 years 0 months) and exactly how much interest accelerates that vs. a checking account at 0.01%.
• Down-payment savings — A 20% down payment on a US median-priced home (~$400,000 in early 2026) is $80,000. With $50,000 saved and $1,000/month at 4% APY, the calculator shows you reach $80,000 in roughly 2 years 4 months — useful for setting a realistic offer timeline.
• Goal-based saving (Monthly needed mode) — Set a $25,000 target for a wedding in 3 years; the calculator back-solves the deposit needed at today's APY, so you can size the standing order before opening the account.
• Comparing accounts apples-to-apples — Run the same starting balance and term against 3.50% (Marcus), 4.00% (Bread Savings), and 4.10% (CIT Bank as of May 2026) to see whether moving accounts is worth the paperwork.
• Visualising opportunity cost of cash drag — Leaving $20,000 in checking at 0.01% APY for 5 years earns about $10 in interest. The same balance at 4% APY in an HYSA earns roughly $4,330 over the same period — the calculator makes that gap legible.
• Stress-testing rate-cut scenarios — Re-run the same plan at 4.00%, 3.50%, and 3.00% APY to see how a Fed cutting cycle erodes your projection; the Fed has held the federal funds rate at 3.5%-3.75% through April 2026, with markets pricing in one more 25 bp cut later this year.

Need different math? Try a compound-interest calculator for non-monthly compounding intervals, a retirement calculator for the withdrawal-phase planning, or a 401k calculator for employer-matched accounts — each models a slightly different question.

Compounding Frequency — How Much Does It Actually Matter?

Banks advertise APY rather than nominal interest rate because APY already bakes in the compounding frequency under the federal Truth in Savings Act. That means a "4.00% APY" account compounding daily and a "4.00% APY" account compounding monthly land at the same end balance — the bank with daily compounding just has a slightly lower nominal rate to compensate. The table below assumes the same 4.00% nominal annual rate (not APY) on a $10,000 deposit, no further contributions, held for one year:

Compounding	Effective APY	End balance after 1 yr	Extra vs. annual
Annual (once/yr)	4.0000%	$10,400.00	baseline
Semi-annual	4.0400%	$10,404.00	+$4.00
Quarterly	4.0604%	$10,406.04	+$6.04
Monthly	4.0742%	$10,407.42	+$7.42
Daily (365/yr)	4.0808%	$10,408.08	+$8.08
Continuous (e^r)	4.0811%	$10,408.11	+$8.11

The lesson: once a bank quotes APY, compounding frequency is already priced in — only nominal rate matters for comparison. The numerical difference between daily and continuous compounding is fractions of a penny per $1,000. If a comparison site quotes one account as "4.00% APY daily" and another as "4.05% APY monthly," the monthly one is genuinely better; ignore the compounding label and read the APY.

Top High-Yield Savings APYs — May 2026 Snapshot

Rates change frequently in a Fed cutting cycle; always confirm on the bank's own page before opening. National savings average is around 0.61% APY (Bankrate, May 2026), so any HYSA below ~3.5% is leaving money on the table.

Bank	APY (May 2026)	Min deposit	Notes
CIT Bank (Platinum Savings)	4.10%	$5,000 to reach top tier	Tiered — lower balance earns less
Vio Bank (Cornerstone Money Market)	4.03%	$100	Money-market account; treated similarly by FDIC
Bread Savings	4.00%	$100	Online-only, no monthly fee
EverBank Performance Savings	3.90%	$0	No minimum, no fee
Marcus by Goldman Sachs	3.50%	$0	Strong customer-service reputation; no fees
Wealthfront Cash	3.30%	$1	Brokerage cash sweep; FDIC up to $5M via partner banks
US national average	0.61%	—	Most brick-and-mortar checking and "regular" savings

Numbers above are from Bankrate's May 2026 round-up; individual banks may have introductory bonuses or relationship-tier boosts not shown.

Frequently Asked Questions

What's the difference between APY and APR?

APY (annual percentage yield) includes the effect of compounding — it's the rate you actually earn over a year. APR (annual percentage rate) is the nominal interest rate before compounding. For savings, you always want APY — that's what regulation (the federal Truth in Savings Act) requires banks to advertise so accounts are directly comparable. APR shows up on loans and credit cards, where it represents the cost before fees. A 4.00% APR compounding monthly produces 4.074% APY; a 4.00% APR compounding daily produces 4.081% APY. Two accounts with the same APY produce the same end balance regardless of how often they compound.

Is daily vs. monthly compounding meaningfully different?

In dollars, no — not once APY is held constant. On $10,000 at 4% APY for one year, daily compounding produces about $0.66 more than monthly compounding (about $8.08 vs $7.42 over a year of straight-line accrual on the nominal rate). On a $100,000 balance over 10 years the gap is roughly $66. The marketing emphasis on "compounded daily" is mostly a holdover from an era before APY was standardized; today the APY number already tells you the full story.

How much is FDIC insurance, and does that change my savings plan?

FDIC insurance covers $250,000 per depositor, per FDIC-insured bank, per ownership category (single, joint, certain retirement accounts, trust, employee benefit plan, corporation, and government — seven categories total). If your projected future value pushes a single-owner account over $250,000, plan to either open accounts at additional FDIC-insured banks or use different ownership categories at the same bank (e.g., a joint account with a spouse covers up to an additional $500,000). Brokerage cash sweep products like Wealthfront Cash spread deposits across partner banks to multiply the limit — Wealthfront advertises $5M of coverage by spreading across roughly 20 banks.

How do Fed rate cuts affect my savings projection?

Savings APYs are not contractually tied to the federal funds rate, but they track it closely. The Fed held rates at the 3.5%-3.75% target range through its April 2026 meeting; the median FOMC projection is for one more 25-basis-point cut in 2026, with markets pricing further cuts into 2027. Each 25 bp cut typically drops HYSA APYs by 15-25 basis points within a few weeks. To stress-test, run your scenario at the current APY, then at -0.50% to see the worst-case for a multi-year savings horizon. CDs lock today's rate — see the next question.

Should I use a CD instead of a high-yield savings account?

A CD locks in today's APY for a fixed term (typically 3 months to 5 years) in exchange for an early-withdrawal penalty if you tap it. HYSAs are liquid but variable — the bank can reset your rate any day. In a falling-rate environment like May 2026, locking some money in a 12-24 month CD at 4.0%+ guarantees that return even if HYSA rates drift to 3% by 2027. The standard playbook: emergency fund in an HYSA for instant access, longer-horizon money laddered across CDs (open 12, 24, 36, 48, 60-month CDs so one matures each year). If rates rise instead, the HYSA portion captures the move automatically.

What about inflation — is my real return positive?

The calculator shows nominal future value. To get real (inflation-adjusted) return, subtract long-run inflation from your APY before running the projection. With headline CPI around 2.5-3% and an HYSA at 4%, your real return is roughly 1-1.5% — positive but modest. In high-inflation periods (CPI > APY), savings lose purchasing power even while the dollar balance grows; that's when investors typically shift longer-horizon savings into TIPS, I-bonds, or diversified portfolios rather than cash. For a 30-year horizon, even a "high-yield" cash account underperforms a stock-bond mix in most historical windows.

Can I model irregular contributions, like a tax-refund lump sum each April?

The calculator assumes a constant monthly deposit, so it doesn't directly model annual lump sums. A workaround: run it twice — once with the lump-sum baseline as the starting balance for a 1-year window, then re-set the starting balance to the projected end balance and continue. Or approximate by adding (annual lump / 12) to your monthly deposit; the error vs. true once-a-year timing is small (a few tenths of a percent of final balance over a decade).

Does the calculator account for taxes on interest?

No — interest earned in a taxable savings account is reported on 1099-INT and taxed as ordinary income at your federal marginal rate (plus state tax in most US states). At a 24% federal bracket, a 4% APY effectively delivers ~3.04% after federal tax. To model after-tax growth, plug in your post-tax rate (APY × (1 − marginal rate)) as the APY (%) input. Tax-advantaged accounts (Roth IRA, HSA, 529) avoid this drag entirely; for retirement-specific projections, use a dedicated 401k or IRA tool that models pre-tax growth.

Why does my bank's app show a different balance than the calculator predicts?

Three usual culprits: (1) timing of deposits — the calculator assumes deposits arrive at the start of each month; if your standing order hits on the 15th, you lose half a month of compounding per deposit; (2) promotional rate expiry — many HYSAs offer a 6-month intro APY that drops to a lower "go-to" rate; the calculator assumes a constant rate; (3) rounding — banks credit interest to the cent at posting, and small differences accumulate. For projections more than a year out, expect the calculator to be within 1-2% of actual; for exact figures, the bank's amortization is authoritative.