Savings Calculator
LiveProjection
A savings calculator is a planning tool, not a forecasting tool. It tells you what you will end up with if you stick to a plan, and it makes it easy to play with the inputs until you find a plan you can actually sustain. For most people, the most useful exercise is iterating on the monthly deposit until you land on a number that hits the target without crushing the rest of the budget.
The defaults shown here assume a high yield savings account or money market fund at around 4.5 percent annual interest, which is roughly where rates sat through 2023 to 2025 in the US. If you are using this for a CD ladder or a Treasury bill rolling strategy, that rate is in the right range. If you are using it for a long horizon investment goal, the stock-leaning compound interest calculator gives more useful projections.
The chart on the result shows two lines: total deposited and total balance. Early on they sit nearly on top of each other. After year five they start to separate, and by year ten the interest is meaningfully adding to your balance month over month. This is the same compounding effect that does the heavy lifting in long term investing, just at lower rates because savings accounts are short term and low risk.
What rate should you actually use
For a true savings account, use the rate your bank pays today. Online high yield savings accounts have run 4 to 5 percent through 2024 and into 2025, while big traditional banks often pay under 0.1 percent for the same product. If you are getting half a percent on your savings, you are leaving real money on the table. Switching to an online high yield savings account is one of the easiest free wins in personal finance.
For short term certificates of deposit and Treasury bills, use the current quoted yield. These rates are also in the 4 to 5 percent range as of 2025 for short maturities, with the curve flattening or inverting for longer maturities.
For a brokerage cash sweep or money market fund, check the published yield. It changes with the federal funds rate and may differ from your savings rate by a few tenths of a point in either direction.
If you are using this calculator as a proxy for a balanced investment portfolio, 5 to 6 percent is a reasonable long term assumption. For a stock heavy long term portfolio, 7 percent is more appropriate, and you should be using the compound interest calculator with annual compounding for cleaner results.
How to set a savings goal that actually works
The single biggest predictor of whether someone saves consistently is whether the monthly deposit is automated. If you have to decide each month whether to transfer money, you will skip it on bad months and underfund the goal. If the transfer happens automatically the day after payday, you adapt your spending to whatever is left, and the savings build without willpower.
Use this calculator to find a target deposit, then set up the automatic transfer to match. If you cannot hit your goal at your current income, lower the target rather than abandoning the plan. Saving $200 a month for ten years beats saving $500 a month for two years and then nothing.
For goals shorter than three years, use this calculator with savings account rates. The stock market is too volatile to count on over that horizon. For goals longer than five years, consider whether some of the savings should be in long term investments instead. The math gets very different at 7 percent versus 4 percent over twenty years.
Categories of savings goals
Emergency fund. Target three to six months of essential expenses in a high yield savings account. Use the calculator with no starting balance, your monthly deposit, and a one to two year time horizon. The interest barely matters at that time scale, so anywhere your money is liquid and insured is fine.
House down payment. Typically a three to five year goal. Use a high yield savings account, money market fund, or short term Treasury bills. Anything riskier exposes you to a downturn right when you need to buy. Plan for 20 percent of your target price plus 3 to 5 percent for closing costs.
Large one time purchase like a car, wedding, or vacation. One to three year horizon. Same vehicle as the down payment, high yield savings, and the goal is to avoid borrowing for it. Run the calculator to find the monthly deposit and time horizon that get you there.
Long term wealth. Five years or longer. Savings accounts are too conservative. Use the compound interest calculator and tilt toward stocks and tax advantaged accounts. The math compounds dramatically more at investing returns than at savings rates.
Inflation and the real value of savings
A dollar saved today buys less ten years from now. If your savings account pays 4 percent and inflation runs at 3 percent, your real purchasing power is growing at only 1 percent annually. The nominal balance shown on the calculator is correct, but in today's dollars your future balance is less than it looks.
For short term goals this barely matters because inflation has little time to accumulate. For long term goals it matters enormously. Run the inflation calculator on your projected final balance to see what it would be worth in today's purchasing power. If the answer disappoints you, the solution is either to save more or to move to a higher return strategy.
Frequently asked questions
Yes, it is built for high yield savings accounts, money market funds, CDs, and similar low risk interest bearing products. For long term investing in stocks or balanced portfolios, the compound interest calculator gives more useful projections.
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