Savings Calculator

Project how a high-yield savings account grows with regular deposits and compounding interest.

How the Savings Calculator works

This savings calculator projects what a deposit account is worth after years of steady monthly deposits, growing at the account's annual percentage yield (APY). It models a starting balance plus a recurring contribution that compounds at a variable rate, the way a real high-yield savings account (HYSA) or regular savings account actually behaves, with no lock-up or fixed term.

The engine is the future value of a starting sum plus an annuity of deposits:

FV = P(1 + r/n)^nt + PMT × [((1 + r/n)^nt − 1) / (r/n)]

• FV = projected future balance
• P = starting balance you have today
• PMT = the recurring deposit you add each period
• r = the APY as a decimal (4.40% becomes 0.0440)
• n = compounding periods per year (12 for monthly)
• t = number of years you keep saving

Step by step, here is what the tool does internally:

1. Convert the APY you enter to a decimal and divide by n to get the periodic rate r/n.
2. Convert your time horizon to total periods, nt (years × 12 for monthly).
3. Grow the starting balance P forward by the factor (1 + r/n)^nt.
4. Grow the stream of deposits using the annuity factor [((1 + r/n)^nt − 1) / (r/n)].
5. Add the two pieces to get FV, then subtract total contributions (P + PMT × nt) to isolate interest earned.

Edge cases it handles: a 0% APY collapses cleanly to P + PMT × nt (a straight sum, no division by zero); a $0 starting balance reduces it to a pure deposit stream; and deposits are treated as end-of-period (ordinary annuity), the conservative convention. The defining assumption that sets this apart from a CD tool is that the rate can move at any time, so the output is a snapshot at today's APY, not a locked guarantee. Re-run it whenever your bank changes its rate.

Example calculation

Three worked scenarios show how a starting balance plus monthly deposits compound at a typical high-yield savings APY. Every figure below was computed with FV = P(1 + r/n)^nt + PMT × [((1 + r/n)^nt − 1) / (r/n)] using monthly compounding (n = 12).

Scenario 1: Starter HYSA, $2,000 + $250/month at 4.25% APY for 5 years

P = $2,000, PMT = $250, r/n = 0.0425/12 = 0.0035417, nt = 60. The starting balance grows to 2,000 × (1.0035417)⁶⁰ = $2,472.60. The deposits grow to 250 × [((1.0035417)⁶⁰ − 1)/0.0035417] = $16,680.13. Total balance: $19,152.74. You put in $17,000 and earned $2,152.74 in interest.

Scenario 2: Aggressive saver, $10,000 + $500/month at 4.50% APY for 8 years

P = $10,000, PMT = $500, r/n = 0.00375, nt = 96. Balance = 10,000 × (1.00375)⁹⁶ + 500 × [((1.00375)⁹⁶ − 1)/0.00375] = $14,323.65 + $57,648.62 = $71,972.27. Contributions were $58,000, so interest earned is $13,972.27.

Scenario 3: From zero, $0 + $300/month at 4.00% APY for 15 years

P = $0, PMT = $300, r/n = 0.0033333, nt = 180. With no starting balance the first term is zero, so Balance = 300 × [((1.0033333)¹⁸⁰ − 1)/0.0033333] = $73,827.15. You contributed $54,000 and earned $19,827.15 in interest, proving that on a variable savings APY, time in the account matters more than a big head start.

Scenario	Start	Monthly	APY	Years	Contributed	Interest	Final balance
Starter HYSA	$2,000	$250	4.25%	5	$17,000.00	$2,152.74	$19,152.74
Aggressive saver	$10,000	$500	4.50%	8	$58,000.00	$13,972.27	$71,972.27
From zero	$0	$300	4.00%	15	$54,000.00	$19,827.15	$73,827.15

Notice interest as a share of total contributions climbs with time: 13% in Scenario 1, 24% in Scenario 2, and 37% in Scenario 3. Because savings APY is variable and not locked like a CD, treat each result as a today-rate snapshot and recompute when your bank moves its rate.

Tips for using the Savings Calculator

• Park the money in an online high-yield savings account, not your bank's default savings tier. The same $5,000 plus $200 a month over 5 years grows to about $19,623 at 4.40% APY versus only $17,231 at a typical 0.42% brick-and-mortar rate, a $2,392 difference for zero extra work.
• Because savings APY is variable and resets with Fed policy, re-run this calculator every time you see a rate-change notice. A drop from 4.50% to 4.00% on a $50,000 balance is roughly $250 less interest in the first year alone.
• Automate the deposit for the day after payday, before discretionary spending clears. Money you never see in checking is money you never miss, and it locks in a full extra month of compounding versus saving at month-end.
• Keep emergency cash and goal savings in separate buckets at the same bank. Most online banks let you open multiple named sub-accounts at no cost, so size the cushion with the dedicated emergency-fund tool and project the other bucket here.
• Watch for tiered and promotional APYs. Some accounts pay the headline rate only up to a balance cap or only for an intro window, then drop. Enter the rate you will actually earn at your balance, not the teaser.
• Mind the FDIC $250,000 per-depositor, per-bank, per-ownership-category limit. If a balance projected here will cross it, split deposits across two banks or add a joint owner so every dollar stays insured.
• Budget for taxes on the interest. Banks issue a Form 1099-INT once you earn $10 or more, and that interest is taxed as ordinary income. At a 22% bracket, a 4.40% APY nets about 3.43%; at 29% combined it nets about 3.12%.
• If your horizon is 12 months or longer and the cash is fully spare, compare a CD: locking a fixed rate can beat a falling variable savings APY when the Fed is cutting. Check the spread before you give up liquidity.
• Round your monthly deposit up to a clean number. Setting $325 instead of a calculated $315 adds a self-funded buffer and quietly pulls your timeline forward without any rate change.
• Do not chase a 0.05% APY difference between two solid online banks if it means leaving your salary direct-deposit ecosystem. On a $20,000 balance, 0.05% is about $10 a year, less than the value of one-click transfers between checking and savings.

High-yield savings vs a brick-and-mortar account

Direct answer: an online high-yield savings account (HYSA) typically pays roughly 10x the APY of a traditional branch savings account, with the same FDIC protection and same-day access, which is why most savers should move spare cash to an HYSA. Both rates are variable, but the branch account starts near zero and the HYSA starts near the top of the market.

The table below runs the identical deposit plan, $5,000 starting plus $200 a month for 5 years, through both rate environments using this calculator's engine.

Feature	High-yield savings (online)	Brick-and-mortar savings
Typical APY (2026)	4.00% - 4.50%	0.01% - 0.45%
5-yr balance ($5k + $200/mo)	$19,622.90 at 4.40%	$17,230.83 at 0.42%
Interest earned	$2,622.90	$230.83
FDIC insured	Yes, to $250,000	Yes, to $250,000
Access	Same-day transfer	Same-day, plus branch
Rate type	Variable	Variable

The $2,392 gap is pure opportunity cost. To compare the two headline rates fairly before you project them here, standardize them with the APY calculator, since APY already folds in compounding frequency.

How to do it by hand or in Excel

Direct answer: in any spreadsheet, the one-line formula is =FV(rate, nper, pmt, pv), where rate is the periodic (monthly) rate, nper is the number of months, pmt is your monthly deposit, and pv is your starting balance.

For Scenario 1 ($2,000 start, $250/month, 4.25% APY, 5 years), enter:

=FV(0.0425/12, 60, -250, -2000)

The deposits and starting balance are entered as negatives because they are cash leaving your wallet; the result returns as a positive $19,152.74. To isolate interest, subtract what you put in: =19152.74 - (2000 + 250*60) gives $2,152.74.

By hand, work the formula FV = P(1 + r/n)^nt + PMT × [((1 + r/n)^nt − 1)/(r/n)] in four steps: (1) compute the growth factor (1.0035417)⁶⁰ = 1.23630; (2) multiply by P for $2,472.60; (3) compute the annuity factor (1.23630 − 1)/0.0035417 = 66.72 and multiply by $250 for $16,680.13; (4) add the two for $19,152.74. One caution unique to a variable-rate savings account: that formula assumes today's APY holds for all 60 months, so redo it after any Fed-driven rate change rather than trusting the original projection.

Is this a good savings rate? Benchmarks for 2026

Direct answer: in 2026 a competitive high-yield savings APY sits in the 4.00% to 4.50% range, the national-average savings rate hovers near 0.40% to 0.45%, and anything below 1.00% means you are leaving money on the table.

Reference points to judge your account:

• Top-tier HYSA: roughly 4.00% to 4.50% APY, usually from online-only banks and credit unions with low overhead.
• National average savings: around 0.40% to 0.45% APY, dragged down by big branch banks paying near 0.01%.
• Money market accounts: often comparable to HYSAs, sometimes with check-writing and a higher minimum.
• Inflation: if core inflation runs near 2.5%, a 4.40% APY gives a real return of about 1.9% before tax.

A simple gut check: $10,000 left for a year earns about $440 at 4.40% but only $42 at 0.42%. The catch with a savings account is that this 1.9% real, variable return is for stability, not wealth-building: the Rule of 72 shows a 4.25% APY doubles cash in roughly 72 ÷ 4.25 = 16.9 years, far slower than a diversified portfolio, which is the whole reason savings is the place for cash you cannot afford to risk.

Common mistakes savers make

Direct answer: the costliest savings mistakes are leaving cash in a near-0% account, forgetting that the rate is variable, and ignoring the tax on interest.

• Settling for the default account. The single biggest error is keeping savings in a branch account at 0.01% to 0.45% when an FDIC-insured online account pays 4%+. On a $20,000 balance that is nearly $800 a year forfeited.
• Treating the APY as fixed. Savings rates float with the Fed. The projection here is a today snapshot, not a locked guarantee like a CD. If you want a rate locked for a set term, that is a different product; compare with the CD calculator.
• Forgetting the 1099-INT. Interest is taxed as ordinary income the year it is credited. Savers who plan around the pre-tax APY overstate their real growth by their marginal tax rate.
• Blowing past the FDIC limit. Balances over $250,000 at one bank in one ownership category are uninsured above the cap. Spread the money.
• Chasing a tiny APY edge. Switching banks for an extra 0.05% rarely beats the convenience and discipline of automated transfers inside one ecosystem.
• Using savings for long-horizon goals. For 15+ year goals, a savings account's modest real return lags diversified investing; model that higher, riskier path with the investment calculator instead.

Taxes on savings interest (1099-INT)

Direct answer: interest from a regular or high-yield savings account is taxed as ordinary income in the year it is credited, reported to you on Form 1099-INT once you earn $10 or more, and it is not eligible for the lower long-term capital gains rates.

Because the tax lands every year (not at withdrawal), your effective yield is the APY times one minus your marginal tax rate. Worked examples on a 4.40% APY:

Combined marginal rate	After-tax APY	Interest on $20,000 (yr 1)
0% (in a tax-advantaged account)	4.40%	$880
22% federal	3.43%	$686
29% (24% fed + 5% state)	3.12%	$625

Two practical takeaways unique to a taxable savings account. First, savers in high brackets should compare a high-yield savings account against Treasury bills or money market funds, whose interest is exempt from state income tax, because the annual 1099-INT drag is what quietly shrinks a headline 4.40% to a real 3.12%. Second, always plan your savings timeline around the after-tax number, not the headline APY, since that pre-tax rate never reaches your pocket.

FDIC insurance: what is actually protected

Direct answer: the FDIC insures deposits up to $250,000 per depositor, per insured bank, per ownership category, so a single-owner savings account at one bank is fully covered only up to $250,000 including accrued interest.

What this means for a growing savings balance:

• The cap counts principal plus interest. If this calculator projects a balance climbing toward $250,000, plan ahead so credited interest does not nudge you over the insured line.
• Ownership categories stack. A single account and a joint account at the same bank are separately insured, effectively doubling coverage for a couple at one institution.
• Multiple banks multiply coverage. $250,000 at each of two unrelated banks means $500,000 insured.
• Credit unions use the NCUA with the same $250,000 limit; the math here is identical.

FDIC coverage is exactly what separates a savings account from a brokerage balance: your principal does not fluctuate and is government-backed up to the cap, even though the interest rate on top of it can drift. For the official rules and a coverage estimator, see the FDIC resource linked below.

Quick reference: 1-year savings interest by balance and APY

At a steady APY, a lump sum earns balance x APY in its first year because APY already includes compounding. The table below shows the interest a one-time deposit earns in a single year at common rates, from a typical brick-and-mortar 0.5% up to a high-yield 5%. Every figure is recomputed as balance x APY; actual results vary because savings APY is variable and moves with the Fed, and interest is taxable as ordinary income (reported on a 1099-INT at $10 or more).

Starting balance	0.5% APY	4% APY	4.5% APY	5% APY
$5,000	$25.00	$200.00	$225.00	$250.00
$10,000	$50.00	$400.00	$450.00	$500.00
$25,000	$125.00	$1,000.00	$1,125.00	$1,250.00
$50,000	$250.00	$2,000.00	$2,250.00	$2,500.00

Adding monthly deposits raises the totals over multiple years; project your own mix of starting balance, deposits and rate at the top of this page, then use the savings goal calculator if you want to work backward from a target instead.

When to use this calculator instead of a sibling tool

Direct answer: use this savings calculator when you want to project the future balance of a flexible, variable-rate deposit account that you keep adding to, and switch tools when your question changes shape.

• You want to keep adding money at a variable rate with full liquidity: this is the right tool.
• You want the rate locked for a fixed term: use the CD calculator, which assumes no withdrawals and a guaranteed APY.
• You already know the target and want the required deposit: use the savings goal calculator, which solves for PMT instead of FV.
• You expect market-style returns with risk: use the investment calculator, which models a higher, volatile return rather than a bank APY.
• You just want to size 3 to 6 months of expenses: use the emergency fund calculator first, then project its growth here.

In short, this tool owns the everyday question, "if I keep depositing into my savings account at today's rate, what will I have?" That single, liquid, FDIC-insured, variable-rate scenario is exactly what it is built to answer.

Related on this site

APY calculator · CD calculator · savings goal calculator · emergency fund calculator · investment calculator · Rule of 72 calculator

For a related deep dive, see FDIC deposit insurance coverage.

Savings Calculator — frequently asked questions

Is the rate guaranteed?

Savings APY is variable and can change with central-bank rates.

Taxed?

Interest is usually taxable income in the year earned unless held in a tax-advantaged account.

Is savings interest taxed?

Usually yes, as ordinary income in the year earned, unless in a tax-advantaged account.

Is my money safe?

Bank deposits are typically insured up to the federal limit per depositor.

How much does $10,000 in a high-yield savings account earn in 5 years at 4.5% APY?

<strong>About $2,462 in interest, growing $10,000 to roughly $12,462.</strong> Because APY already includes compounding, a lump sum left untouched grows by (1 + 0.045)⁵, or 12,461.82. That assumes the rate holds steady, which it rarely does on a variable-rate savings account, so treat it as a best case. Run your own figures in the <a href="/savings-calculator/">savings calculator</a> or check <a href="/compound-interest-calculator/">compound interest</a>.

How much will I have if I save $500 a month for 3 years at 4% APY?

<strong>About $19,091, of which $18,000 is your deposits and roughly $1,091 is interest.</strong> Saving $500 monthly for 36 months puts $18,000 in, and a 4% variable APY adds about $1,091 on top, assuming the rate stays near 4%. The interest is modest over 3 years because most deposits have only been earning for a short time. Solve for the deposit instead with the <a href="/savings-goal-calculator/">savings goal calculator</a>.

How much more does a 4.5% HYSA earn than a 0.5% bank on $20,000 in one year?

<strong>About $800 more: roughly $900 versus $100 in interest.</strong> At 4.5% APY, $20,000 earns about $900 in a year; at a typical brick-and-mortar rate near 0.5%, the same balance earns only about $100. That gap is why online high-yield accounts pay so much more than national-average savings rates. Rates are variable, so the spread can widen or shrink as the Fed moves. Compare scenarios in the <a href="/apy-calculator/">APY calculator</a>.

How much tax will I owe on $25,000 in savings earning 5% APY?

<strong>If it earns about $1,250 in interest and you are in the 22% bracket, you owe roughly $275, leaving about $975.</strong> Savings interest is ordinary income taxed at your marginal rate, not a special savings rate. $25,000 at 5% APY earns $1,250 in a year; 22% of that is $275. Your bank reports it on a 1099-INT if interest is $10 or more. Estimate your bracket with the <a href="/take-home-pay-calculator/">take-home pay calculator</a>.

What does saving $100 a month at 4.25% APY grow to in 10 years?

<strong>About $14,921, with around $2,921 of that being interest.</strong> Ten years of $100 deposits totals $12,000 contributed, and a steady 4.25% APY adds roughly $2,921. The early deposits compound longest, so they do most of the work. Because savings APY floats with central-bank policy, the real result will swing with future rate changes. See the long-run effect of small deposits in the <a href="/compound-interest-calculator/">compound interest calculator</a>.

Is a high-yield savings account worth it for an emergency fund?

<strong>Yes, because it keeps your cash liquid and FDIC-insured while paying many times more than a standard account.</strong> A $12,000 emergency fund at 4% APY earns about $480 a year versus a few dollars at a typical big-bank rate, with no lockup like a CD. The trade-off is a variable rate that can fall, but you keep penalty-free access. Size your cushion with the <a href="/emergency-fund-calculator/">emergency fund calculator</a>.

How much interest does $50,000 earn in a savings account over 2 years at 4.5% APY?

<strong>About $4,601 in interest, bringing the balance to roughly $54,601.</strong> A $50,000 lump at 4.5% APY grows by (1 + 0.045)², which equals 54,601.25. Year two earns more than year one because you also earn interest on the first year's interest. Remember this is a variable rate, so a Fed cut could lower it mid-term. A CD would lock the rate but lose liquidity; compare with the <a href="/cd-calculator/">CD calculator</a>.

What happens to my savings if I keep more than $250,000 at one bank?

<strong>Anything above $250,000 per depositor, per insured bank, per ownership category is uninsured, so on a $300,000 single account, $50,000 is at risk.</strong> FDIC insurance covers up to $250,000; splitting funds across banks or adding ownership categories (joint, trust) raises coverage. The interest math is unchanged, but uninsured cash is exposed if the bank fails. Track total balances across accounts in the <a href="/net-worth-calculator/">net worth calculator</a>.

How do I calculate savings account growth with monthly deposits in Excel?

<strong>Use =FV(rate/12, years*12, -deposit, -starting_balance) with the APY entered as a decimal.</strong> For $1,000 a month at 4% APY for 5 years, enter =FV(0.04/12, 60, -1000, 0), which returns about $66,299, including roughly $6,299 of interest. Make deposits negative because they are cash outflows from you. The monthly-rate approximation is close to true APY for everyday planning. Check the result against the <a href="/future-value-calculator/">future value calculator</a>.

Should I keep extra cash in savings or pay down debt first?

<strong>Usually pay down debt first whenever its interest rate beats your savings APY, which is almost always true for credit cards.</strong> A 4.5% HYSA on $15,000 earns about $3,008 more than 1% over 5 years, but a 22% credit card costs far more than any savings account pays. Keep a small emergency buffer, then attack high-rate debt. Compare the cost side with the <a href="/credit-card-payoff-calculator/">credit card payoff calculator</a> and <a href="/debt-payoff-calculator/">debt payoff calculator</a>.

How much monthly interest does $30,000 earn at 4.8% APY?

<strong>Roughly $120 in the first month, before compounding adds slightly more later.</strong> A 4.8% APY works out to about 0.4% a month, and 0.4% of $30,000 is about $120. The exact monthly credit edges up as your balance grows. Over a full year the total lands near $1,440. Because the APY is variable, that $120 can shrink if rates drop. Project the full year in the <a href="/savings-calculator/">savings calculator</a>.

What will $2,000 plus $200 a month grow to in 7 years at 4% APY?

<strong>About $21,996, of which roughly $3,196 is interest.</strong> You contribute $2,000 up front plus $16,800 in deposits ($200 for 84 months), for $18,800 total, and a steady 4% APY adds about $3,196. The starting balance compounds the longest, so a bigger opening deposit boosts the result. A variable rate means the actual figure drifts with Fed policy. Test other combinations in the <a href="/investment-calculator/">investment calculator</a>.

How much does my savings interest drop if my APY falls from 4.5% to 3.5%?

<strong>On $40,000, annual interest falls from about $1,800 to about $1,400, a $400 drop.</strong> Savings rates are variable and move with the Fed, so a 1-percentage-point cut on $40,000 costs roughly $400 a year. That is the main downside versus a CD, which locks today's rate for the term. If you expect cuts and will not need the cash, a CD can hedge; compare in the <a href="/cd-calculator/">CD calculator</a>.

How much can I build in 20 years saving $300 a month at 4.25% APY?

<strong>About $113,179, with roughly $41,179 of that being interest on $72,000 deposited.</strong> Twenty years of $300 deposits totals $72,000, and a steady 4.25% APY adds about $41,179 through compounding. Over decades, savings rates will vary widely, so view this as an illustration, not a guarantee. For long horizons, also compare a diversified approach in the <a href="/sip-calculator/">SIP calculator</a>.

Do I get a 1099-INT for a small amount of savings interest?

<strong>Banks issue a 1099-INT when you earn $10 or more in interest, but you owe tax on all of it even if no form arrives.</strong> So $5 of interest on a tiny balance may not trigger a form, yet it is still reportable income. Larger balances clearly cross the threshold; $5,000 at 4% APY earns about $200, well above $10. Keep your year-end statements so nothing is missed. Estimate the tax bite using the <a href="/take-home-pay-calculator/">take-home pay calculator</a>.

Is it worth switching banks for a 0.5% higher savings APY?

<strong>It can be: on $7,500, moving from 4% to 4.5% APY adds about $37.50 a year, and the gap grows with bigger balances.</strong> Half a point is small on modest balances but meaningful on five- or six-figure savings, where it can be hundreds of dollars annually. Weigh the gain against transfer hassle and confirm the new account is FDIC-insured with no fees. Compare exact figures side by side in the <a href="/apy-calculator/">APY calculator</a>.

Guides & articles

• How Much Will My Savings Grow With Monthly Deposits?
• High-Yield Savings vs Regular Savings: How Much More You Earn

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