Savings Calculator
Calculate how your savings grow with compound interest. Enter your initial deposit, monthly contributions, APY, and time horizon to see your future balance, total interest earned, and inflation-adjusted real value.
📅 Bank rates indicative — updated January 2026How Compound Interest Grows Your Savings
Compound interest is the single most powerful force in personal finance. Unlike simple interest — which pays you a fixed amount each year based only on your original deposit — compound interest pays you interest on your interest, creating a snowball effect that accelerates dramatically over time.
The math: if you deposit $10,000 at 5% APY, you earn $500 in year one. In year two, you earn 5% on $10,500 = $525. Year three: 5% on $11,025 = $551. By year 20, your annual interest is $1,327 — more than 2.6× the first year's interest, from the same original deposit. Over 30 years, that $10,000 becomes $43,219 with zero additional contributions.
Compounding frequency matters, but less than people think for standard savings. Daily compounding earns slightly more than monthly, which earns slightly more than annual. At 5% APR on $10,000 for 10 years: annual compounding gives $16,289; monthly gives $16,470; daily gives $16,487. The difference is $198 — meaningful but not dramatic. What matters far more is the rate and how long you save.
Monthly contributions supercharge compounding. Adding just $200/month to that $10,000 at 5% APY transforms the 10-year result from $16,470 to $47,392 — nearly 3× more — because every contribution compounds from its deposit date forward.
Choosing the Right Savings Account
Not all savings accounts are equal. The difference between a 0.5% APY traditional bank account and a 5.0% APY high-yield savings account is enormous over time. On $50,000 over 10 years: traditional earns $2,534; high-yield earns $31,445. That's $28,911 you'd lose by not switching.
High-yield savings accounts (HYSAs) from online banks are the best choice for most people's liquid savings. They're FDIC-insured up to $250,000 (same as any bank), pay 4.5–5.2% APY as of 2026, and have no fees or minimum balance requirements at top institutions. The only downside: transfers to your checking account take 1–3 business days, so they're not ideal for truly immediate-access funds.
Money market accounts (MMAs) are similar to HYSAs but may offer check-writing privileges. Rates are comparable. They're a good choice if you want occasional direct access to the funds without a transfer delay.
Certificates of Deposit (CDs) typically offer higher rates than HYSAs in exchange for locking your money for a fixed term (3 months to 5 years). If you don't need access to the funds for a defined period, a CD ladder — spreading deposits across multiple CD terms — can maximize yield while maintaining some liquidity.
Treasury bills (T-bills) issued by the US government are another option for short-term savings. They're exempt from state income tax and backed by the full faith of the US government. T-bills are purchased through TreasuryDirect.gov or a brokerage account.
Savings Strategies That Actually Work
Pay yourself first. Set up an automatic transfer to your savings account on payday before you can spend the money. Automating savings removes the willpower equation entirely. Start with whatever you can — even $50/month — and increase it by 1% of income each year.
Use separate accounts for separate goals. Mixing your emergency fund with your vacation fund with your down payment fund leads to raiding one for another. Most online banks let you open multiple savings accounts with custom labels at no cost. Keep your emergency fund truly separate and mentally off-limits except for actual emergencies.
Take advantage of tax-advantaged accounts first. For retirement savings, a 401(k) or IRA grows tax-deferred (traditional) or tax-free (Roth), which is far more powerful than a taxable savings account. For medical expenses, an HSA is triple-tax-advantaged. For education, a 529 plan grows tax-free for qualified education expenses. These accounts should be funded before or alongside a taxable HYSA whenever possible.
Beat inflation. At 3% inflation, money in a 0.5% savings account loses roughly 2.5% of purchasing power per year. A 5% HYSA actually beats inflation slightly. For money you won't need for 5+ years, consider index funds instead — the S&P 500 has historically returned ~10% nominal (7% real), well ahead of inflation and most savings accounts.
Frequently Asked Questions
How much should I have in savings?
Start with 3–6 months of essential living expenses in a liquid emergency fund. Essential expenses include rent/mortgage, utilities, groceries, insurance, and minimum debt payments — not total spending. For a $3,000/month budget, target $9,000–$18,000 in savings. Beyond the emergency fund, the right amount depends on your goals: down payment savings, education funding, or long-term wealth building require separate buckets with different account types and time horizons.
What's the difference between APY and APR?
APY (Annual Percentage Yield) is the effective annual return including compounding — it's what you actually earn. APR (Annual Percentage Rate) is the simple rate before compounding. For savings accounts, APY is always the right number to compare, since it accounts for how often interest compounds. For a 5% APR compounded monthly, the APY is 5.116%. Always use APY when comparing savings account offers.
Is my money safe in a high-yield savings account?
Yes — high-yield savings accounts at FDIC-member banks are insured up to $250,000 per depositor, per bank. This means even if the bank fails, your money is fully protected up to that limit. To verify any bank's FDIC membership, search at fdic.gov/bank/find. Credit union savings accounts (called share accounts) are similarly insured by the NCUA up to $250,000.
Should I save money or invest it?
Both, typically at the same time — but for different purposes. Savings accounts (HYSAs, CDs) are for money you need within 1–5 years: emergency fund, near-term goals like a car or vacation. Investments (index funds, 401k, IRA) are for money you won't need for 5+ years, especially retirement. Investing short-term savings exposes you to market downturns at exactly the wrong time — you might need the money just when the market is down 30%.
How does inflation affect my savings?
Inflation erodes purchasing power over time. At 3% inflation, $100 today buys the equivalent of $74 worth of goods in 10 years. If your savings account earns only 0.5% APY (like most big-bank accounts), you're losing purchasing power every year. Top HYSAs at 4.5–5.2% APY currently beat inflation, making your real (inflation-adjusted) savings grow. This calculator shows your inflation-adjusted value in the results — a crucial figure for long-term planning.
🏢 Best High-Yield Savings Rates
Indicative ranges only — verify directly with institution before depositing.
| Bank / Institution | Account Type | APY | Notes |
|---|---|---|---|
| Marcus by Goldman Sachs | High-Yield Savings | 4.50% | No min balance; FDIC insured |
| Ally Bank | High-Yield Savings | 4.35% | No min; 24/7 support |
| American Express HYSA | High-Yield Savings | 4.25% | No fees; FDIC |
| Discover Bank | Online Savings | 4.25% | No min balance |
| Synchrony Bank | High-Yield Savings | 4.65% | ATM card available |
| Capital One 360 | Performance Savings | 4.10% | No fees; great app |
| Citizens Access | Online Savings | 4.50% | No min balance |
| UFB Direct | High-Yield Savings | 5.05% | Highest tier; mobile only |
| SoFi Bank | Savings + Checking | 4.60% | Direct deposit required |
| Bread Savings | High-Yield Savings | 5.15% | No monthly fees |
🔢 How It Works
Future Value = Initial × (1 + r/n)^(n×t) + PMT × [((1+r/n)^(n×t) − 1) / (r/n)]
Where r = annual rate, n = compounds per year, t = years, PMT = monthly contribution.
