Savings Calculator
See exactly how much your savings account will grow over time with regular deposits and compound interest.
| Summary | Amount |
|---|
Compounding Frequency Comparison
Compounding frequency affects how quickly your savings grow. This reference table shows the effective annual rate at 5% nominal interest.
| Compounding | Times per Year | Effective Rate at 5% APR |
|---|---|---|
| Annually | 1 | 5.000% |
| Semi-Annually | 2 | 5.063% |
| Quarterly | 4 | 5.095% |
| Monthly | 12 | 5.116% |
| Weekly | 52 | 5.125% |
| Daily | 365 | 5.127% |
How the Savings Calculator Works
The savings calculator computes future value by combining two components: the growth of your initial balance through compound interest, and the accumulated value of your regular deposits (an annuity).
Formula Used
Where: PV = Starting balance PMT = Deposit amount per period r = Annual interest rate (decimal) n = Compounding periods per year t = Time in years timing = 1 if beginning of period, 0 if end
What Each Input Means
- Starting Balance: The amount already in your account. Enter 0 if starting from scratch.
- Deposit Amount: The fixed amount you add to your account each period.
- Deposit Frequency: How often you make those deposits (monthly, weekly, etc.).
- Deposit Timing: Whether you deposit at the start or end of each period. Beginning-of-period deposits earn slightly more interest.
- Saving Period: The number of years over which you will be saving.
- Annual Interest Rate (APY): The yearly interest rate on your savings account.
- Compounding Frequency: How often interest is applied to your balance. Daily compounding is typical for savings accounts.
Why Compound Interest Matters
Compound interest is often called the eighth wonder of the world because your interest earns interest. Compound interest means that every period, the interest you earned in prior periods is added to your principal before new interest is calculated. Over long timeframes, this exponential growth becomes very powerful.
For example, $1,000 invested at 5% compounding daily for 20 years grows to approximately $2,718 without any additional deposits. With $200 in monthly deposits, that figure jumps to over $84,000.
Tips to Maximize Your Savings
- Start early. Time is the most powerful variable in compound interest growth.
- Choose accounts with the highest APY and most frequent compounding.
- Automate deposits so you save consistently without relying on willpower.
- Even small increases in deposit frequency or amount make a large difference over decades.
Difference Between APR and APY
APR (Annual Percentage Rate) is the nominal rate before compounding is applied. APY (Annual Percentage Yield) is the effective rate after compounding is factored in. Savings accounts typically advertise their APY because it reflects what you actually earn. When using this calculator, enter the APY listed by your bank for the most accurate projection.
Frequently Asked Questions
A savings calculator uses your starting balance, regular deposit amount, deposit frequency, interest rate, and compounding frequency to project the future value of your savings account over a chosen time period.
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. The more frequently interest compounds (for example daily vs annually), the faster your savings grow.
A common guideline is to save at least 20% of your monthly income. However, the right amount depends on your income, expenses, financial goals, and timeline. Use this calculator to find the deposit that will hit your target.
APY stands for Annual Percentage Yield. It is the real rate of return on your savings after accounting for the effects of compounding interest. A higher APY means your money grows faster over the same period.
Yes, slightly. Depositing at the beginning of each period means your money earns interest for the entire period, resulting in a marginally higher final balance compared to depositing at the end. Over many years, this timing difference adds up.
The time depends on your starting balance, monthly deposits, and interest rate. For example, saving $500 per month at a 4.5% APY with no starting balance takes approximately 13 to 14 years to reach $100,000. Use the calculator above to find your personal timeline.