Recurring Investment Calculator
Recurring Investment Calculator
See how a fixed contribution schedule could grow from a zero starting balance.
Recurring Investment Results
Enter a contribution, return, and term to calculate.
Calculate to see the recurring investment schedule.
Calculation assumptions
The Recurring Investment Calculator estimates how a fixed contribution schedule may grow over time. Enter an amount, choose how often it will be invested, select whether contributions occur at the beginning or end of each period, and provide an annual return and time horizon. The calculator separates the projected balance into total contributions and investment earnings.
This tool begins with a zero balance and models equal recurring contributions. It is useful for exploring regular investing habits without mixing in a starting lump sum, annual contribution increases, fees, inflation, or multiple return scenarios. Those additional variables belong in a broader investment growth analysis; this calculator stays focused on the effect of consistent deposits.
How Recurring Investments Grow
A recurring investment is a fixed amount contributed according to a regular schedule. Examples include investing every payday, making a monthly brokerage contribution, adding money to an education fund each quarter, or funding an account once per year.
The projected balance has two components. The first is the money contributed. The second is the return earned on those contributions. Earlier deposits normally have more time to compound, which means the timing and frequency of contributions can influence the final result even when the total amount invested is similar.
For equally spaced end-of-period contributions, the standard future-value relationship is based on an ordinary annuity:
FV = PMT × [((1 + i)N − 1) ÷ i]
PMT is the contribution amount, i is the effective return per contribution period, and N is the number of contributions. Beginning-of-period contributions are treated as an annuity due, so each scheduled deposit receives one additional contribution period of growth when the term contains a whole number of periods.
How to Use the Recurring Investment Calculator
Choose a start date and currency, then enter the amount you plan to contribute each time. Select weekly, every two weeks, monthly, quarterly, or annual contributions. The frequency describes the deposit schedule, not the compounding schedule.
Enter the annual return and choose whether it is stated as APR or APY:
- Nominal annual rate (APR): A stated annual rate that requires a compounding frequency.
- Effective annual rate (APY): An annual return that already incorporates compounding.
When APR is selected, you can choose daily, monthly, quarterly, semiannual, annual, or continuous compounding. When APY is selected, the compounding field is disabled because the effective annual return already includes that effect. The calculator converts the annual return into an equivalent return for the selected contribution interval.
Finally, enter the number of years and additional months, and choose whether deposits occur at the beginning or end of each contribution period. Select Calculate Investment to update the results. The chart compares the projected balance with cumulative contributions, while the schedule shows annual progress and a final partial-year row when needed.
Beginning Versus End of Period
Contribution timing matters because it changes how long each deposit is invested. A beginning-of-month contribution is assumed to enter the account immediately and earn a return during that month. An end-of-month contribution enters after that month has passed.
For example, a 10-year monthly schedule contains 120 contributions whether deposits are made at the beginning or end of each complete month. With a positive return, the beginning-of-period result is higher because each contribution has one extra month to grow. For a partial annual period, a beginning-of-year schedule can include a deposit at the start, while an end-of-year schedule will not include the first deposit until a full year has elapsed.
Understanding the Results
The calculator displays five key results:
- Projected Balance: The estimated account value at the end date.
- Total Contributed: Contribution amount multiplied by the number of scheduled deposits.
- Investment Earnings: Projected balance minus total contributions.
- Number of Deposits: The contributions included before or on the end date under the selected timing assumption.
- Earnings Share: The percentage of the projected balance attributable to investment growth rather than contributions.
The annual schedule also reports contributions and growth during each period. This makes it easier to see when compounding begins to contribute a larger share of the balance. CSV downloads can be opened in Excel or Google Sheets. Print and PDF-ready reports include the Compound Daily website and the calculator-page address for reference.
Recurring Investment Versus Investment Growth
This calculator is intentionally narrower than the Investment Growth Calculator. Use the Recurring Investment Calculator when the starting balance is zero and the central question is what equal, regularly scheduled deposits may become.
Use the Investment Growth Calculator when you need to combine an initial investment with contributions or test annual contribution increases, fees, inflation, and multiple return scenarios. Use the Future Value Calculator for one existing lump sum with no additional deposits. Keeping those jobs separate prevents the same calculator from appearing under several different names.
Planning With Realistic Assumptions
A constant return is a mathematical assumption, not a prediction. Real investments fluctuate, and the order of gains and losses can affect actual outcomes. Taxes, fund expenses, trading costs, missed deposits, and changes to the contribution amount can also reduce or increase the account value.
Consider testing several reasonable returns instead of relying on one optimistic figure. You can also compare frequencies and timing choices, but only use a contribution schedule that fits the cash flow you can maintain. Consistency is useful in a projection because the calculator assumes every scheduled deposit is made.
Frequently Asked Questions
Does this calculator include an initial investment?
No. It always starts from zero so the result reflects recurring contributions alone. Use the Investment Growth Calculator if you also have an opening balance.
Why can contribution frequency change the result?
More frequent deposits can put portions of the annual contribution to work earlier. However, changing frequency also changes the number of deposits, so compare schedules using equivalent total annual contributions when evaluating frequency alone.
Are the projected results guaranteed?
No. Results are estimates based on fixed contributions and a constant return. They are for educational planning and do not account for market volatility, fees, taxes, inflation, or changes in personal circumstances.