Investment Return Calculator
* Required Field
Investment Return Calculator
Calculator Description
The Investment Return Calculator tells you exactly how an investment has actually performed — in dollars and in percentage terms — once you account for every dollar you put in and every dollar you took out along the way. Instead of projecting a hypothetical future value from an assumed growth rate, this tool works backward from real numbers: what you started with, what you added or withdrew, how long you've held it, and what it's worth today.
The Purpose
Most "investment calculators" ask you to guess a rate of return and then project forward. That's useful for planning, but it's the wrong tool when you already have an investment and just want to know: how am I actually doing?
This calculator answers that question directly. It's built for situations like:
- Checking the real performance of a brokerage or retirement account after years of contributions
- Working out whether a savings or investment plan with regular deposits (or withdrawals) is actually ahead or behind
- Comparing your actual annualized return (CAGR) against a benchmark, like the stock market's long-run average
- Getting a clean profit/loss figure for tax planning, net worth tracking, or simply peace of mind
Explaining the Input Sections
| Field | What it means |
|---|---|
| Initial Investment ($) | The lump sum you invested at the very start, before any contributions or withdrawals. This is a required field. |
| Monthly Contribution ($) | How much you added to the investment, on average, each month. This is optional — leave it at 0 if you never added money after the initial investment. |
| Monthly Withdrawal ($) | How much you took out of the investment, on average, each month. Also optional — leave it at 0 if you never withdrew. |
| Investment Period (Years) | How long you've held the investment, from the day you made the Initial Investment to today. Required, since it's used to total up contributions/withdrawals and to calculate your annualized return. |
| Current Investment Value ($) | What the investment is worth today — the number from your brokerage statement or account balance. This is the actual figure the calculator compares everything against. |
Formula
The calculator works in three steps.
Step 1 — Total Amount Invested (your cost basis):
Total Amount Invested = Initial Investment
+ (Monthly Contribution × Months)
− (Monthly Withdrawal × Months)
Step 2 — Profit or Loss:
Profit or Loss ($) = Current Investment Value − Total Amount Invested
Profit or Loss (%) = (Profit or Loss ($) ÷ Total Amount Invested) × 100
Step 3 — Annualized Return (CAGR):
Annualized Return (%) = [ (Current Investment Value ÷ Total Amount Invested) ^ (1 ÷ Years) − 1 ] × 100
The Profit/Loss percentage tells you your total gain or loss over the whole period. The Annualized Return (CAGR) smooths that same result out into a "per year" figure, which is what makes it possible to compare against other investments or benchmarks on a like-for-like basis.
Worked Example
Say you invested $10,000 to start, then added $200 a month for 5 years, never withdrew anything, and your account is worth $28,000 today.
Step 1 — Total Amount Invested
- Months = 5 × 12 = 60
- Contributions = $200 × 60 = $12,000
- Total Amount Invested = $10,000 + $12,000 − $0 = $22,000
Step 2 — Profit or Loss
- Profit or Loss ($) = $28,000 − $22,000 = +$6,000
- Profit or Loss (%) = $6,000 ÷ $22,000 × 100 = +27.27%
Step 3 — Annualized Return (CAGR)
- ($28,000 ÷ $22,000) ^ (1/5) − 1 = 1.2727 ^ 0.2 − 1 ≈ +4.94% per year
So while the investment gained 27.27% in total over five years, its actual annualized pace of growth was closer to 4.94% a year — a more realistic figure to compare against, say, a savings account or the S&P 500's long-term average.
FAQ
1. What's the difference between "Profit or Loss (%)" and "Annualized Return (CAGR)"? Profit or Loss (%) is your total return over the entire holding period, in one lump figure. Annualized Return (CAGR) spreads that same total return evenly across each year, so you get a "per year" pace of growth. CAGR is the better number to use when comparing investments held for different lengths of time.
2. Do I have to enter a Monthly Contribution or Withdrawal? No. Both fields are optional and default to $0. If your investment was a single lump sum with nothing added or removed since, just leave them as-is and the calculator will use your Initial Investment as the full cost basis.
3. Why isn't "Total Amount Invested" the same as my Initial Investment? Total Amount Invested is your true cost basis — the Initial Investment plus everything you contributed afterward, minus anything you withdrew. If you've been adding money regularly, your real invested capital is higher than the initial lump sum, which changes your actual return.
4. Can I use this for stocks, crypto, real estate, or a retirement account? Yes. The calculator only needs dollar amounts and a time period, so it works for any asset — a brokerage account, a crypto wallet, a rental property, a 401(k), or a savings plan — as long as you can estimate what you put in, what (if anything) you added or withdrew, and what it's worth now.
5. Why does the calculator need the Investment Period if I already know my Current Investment Value? The dollar and percentage Profit/Loss figures don't need the time period — but the Annualized Return (CAGR) does. Without knowing how long the money was invested, there's no way to tell whether a 27% gain happened over 1 year (excellent) or 15 years (fairly modest), so the period is what makes the annualized figure meaningful.
Related Calculators
If you're evaluating investment performance, these tools on Smart Calculators Hub go well together with this one:
- Compound Interest Calculator (With Increasing Contributions) — project how a new investment could grow forward, rather than measuring one you already hold.
- CAGR Calculator With Extra Cash Flows — a deeper dive into annualized return when cash flows are irregular rather than a fixed monthly amount.
- Retirement Savings Goal Calculator — use your calculated return here as an input assumption for retirement planning.
- Reverse Discounted Cash Flow (DCF) Calculator — for stock investors, see what growth rate the market is already pricing into a company's shares.