Finance category
Mortgage, loan, investing, tax, and money calculators.
Investment Return Calculator
Project how your investments may grow over time. Compare two strategies, estimate after-tax gains, and see exactly how much of your ending balance comes from your contributions versus market returns.
Investment Return Calculator
Forecast long-term growth, compare scenarios, and see how compounding does the heavy lifting.
Scenario A
Adjust the assumptions and compare long-term outcomes.
Applies a simple tax estimate to gains so you can compare pre-tax and after-tax outcomes.
Scenario A
After estimated taxesFinal Balance
$343,778
Total Invested
$130,000
Total Return
$213,778
Total Gain
$213,778
Annualized Return
4.98%
From Contributions
$130,000
From Returns
$213,778
Estimated Tax on Gains
$0
Year-by-Year Growth Table
See how contributions and returns stack up over time in your scenario.
| Year | Total Invested | Gross Balance | Tax on Gains | Final Balance | Returns Portion |
|---|---|---|---|---|---|
| 1 | $16,000 | $17,055 | $0 | $17,055 | $1,055 |
| 2 | $22,000 | $24,695 | $0 | $24,695 | $2,695 |
| 3 | $28,000 | $32,970 | $0 | $32,970 | $4,970 |
| 4 | $34,000 | $41,932 | $0 | $41,932 | $7,932 |
| 5 | $40,000 | $51,637 | $0 | $51,637 | $11,637 |
| 6 | $46,000 | $62,148 | $0 | $62,148 | $16,148 |
| 7 | $52,000 | $73,531 | $0 | $73,531 | $21,531 |
| 8 | $58,000 | $85,859 | $0 | $85,859 | $27,859 |
| 9 | $64,000 | $99,210 | $0 | $99,210 | $35,210 |
| 10 | $70,000 | $113,669 | $0 | $113,669 | $43,669 |
| 11 | $76,000 | $129,329 | $0 | $129,329 | $53,329 |
| 12 | $82,000 | $146,288 | $0 | $146,288 | $64,288 |
| 13 | $88,000 | $164,655 | $0 | $164,655 | $76,655 |
| 14 | $94,000 | $184,546 | $0 | $184,546 | $90,546 |
| 15 | $100,000 | $206,088 | $0 | $206,088 | $106,088 |
| 16 | $106,000 | $229,419 | $0 | $229,419 | $123,419 |
| 17 | $112,000 | $254,685 | $0 | $254,685 | $142,685 |
| 18 | $118,000 | $282,049 | $0 | $282,049 | $164,049 |
| 19 | $124,000 | $311,684 | $0 | $311,684 | $187,684 |
| 20 | $130,000 | $343,778 | $0 | $343,778 | $213,778 |
EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.
Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.
Learn more about our review process on the EveryCalc methodology page.
Calculation notes and example
Investment return formula used here
The projection grows a starting balance and recurring contributions by an assumed annual return, then compares ending value, total contributions, and investment gains. When tax assumptions are included, the calculator reduces returns or ending proceeds to show after-tax impact. The goal is to make tradeoffs visible: a higher monthly contribution, lower fee drag, or longer time horizon can matter more than chasing a slightly higher return assumption.
Worked example
Imagine a $50,000 portfolio with $1,000 added monthly for 15 years. At 6% annual growth, contributions total $180,000 and the ending balance may land far above the $230,000 put in. A second scenario at 4.5% shows the sensitivity to return assumptions. Use CAGR to translate past performance into an annualized rate, then bring that rate back here to test future contributions and taxes.
Edge cases and practical tips
- Do not use a single best-case return for every plan; run low, base, and high cases.
- Taxes and fees compound negatively, so small annual differences can become large over long horizons.
- If money is needed soon, volatility matters more than the average return.
Useful companion tools: Compound Interest Calculator, CAGR Calculator, ROI Calculator, and Inflation Calculator.
How to interpret the investment return result
Best use
Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.
Cross-check
Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.
Watch for
Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.
This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.
Before relying on this investment return estimate
Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.
Confirm source numbers
Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.
Separate cash flow from total cost
A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.
Run conservative cases
Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.
Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.
How to Use
- Enter your starting investment, monthly contribution, expected annual return, and investment timeline.
- Optionally add a tax rate on gains to estimate after-tax results.
- Review the total invested, final balance, total return, and annualized return.
- Turn on comparison mode to test two strategies side by side, such as a higher monthly contribution or a different return assumption.
- Use the year-by-year table to see when compounding starts to outpace your direct contributions.
Frequently Asked Questions
What is an investment return calculator?
An investment return calculator estimates how a portfolio may grow based on your starting balance, ongoing contributions, expected annual return, and time horizon. It helps you model different saving and investing strategies before you commit real money.
Why does compounding matter so much?
Compounding means your gains can generate gains of their own. Over long periods, this snowball effect can make returns contribute more to your final balance than your direct deposits, especially when you stay invested consistently.
How accurate are projected investment returns?
They are only estimates. Real-world returns vary from year to year, and taxes, fees, inflation, and market swings can all affect your results. This calculator is best used for planning scenarios, not guarantees.
Should I compare different contribution amounts or different return assumptions?
Both are useful. Comparing contribution amounts shows the impact of saving more each month, while comparing return assumptions helps you understand how conservative versus aggressive growth rates can change long-term outcomes.
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