Most people can tell you how much money is in their brokerage account or their retirement investment account. But very few can tell you, with any confidence, whether that their investment is actually making money and what is the total return.
How much money is in their investment account is just a balance. Whether that their investment is actually making money and what is the real return requires comparing that balance against every dollar you ever put in, and that's where most had missed this part of calculation, especially when monthly contributions or withdrawals is involved.
That's the gap the Investment Return Calculator is built to close. You're not asked to guess a growth rate and project into the future like the way most "investment calculators" work. Instead, you input the fields based on what you started with, what you added or took out along the way, how long it's been, and what the account is worth today. It will show your Total Return, your true profit or loss, in dollars and in percentage terms, plus the one number that lets you compare your investment and that's the annualized return (CAGR).
This guide walks through what each input means, the exact formulas running behind the "Calculate" button, and a simple story that shows how two people with the same ending balance can have very different actual results.
Why "How much did I make?" Is Harder Than It Sounds
Say your brokerage account started the year at $10,000 and it's worth $16,000 now. Did you make $6,000? Only if you never added another dollar. If you were contributing $200 a month the whole time, a chunk of that $16,000 is just money you deposited — not money the investment earned for you. Mixing up "money I put in" with "money I made" is one of the most common ways people overestimate how well an investment is actually performing.
The calculator solves this by first working out your true cost basis, with every dollar contributed minus every dollar withdrawn before it ever touches the question of profit or loss.
Step-by-Step: How to Use the Calculator
- Enter your Initial Investment. This is the lump sum you put in on day one, before any contributions or withdrawals. If you opened the account with $5,000, that's the number.
- Enter your Monthly Contribution (optional). If you've been adding a set amount each month — a recurring transfer into a brokerage account, an automatic 401(k) deduction, a DCA crypto buy — enter the average monthly amount. If you never added anything after the initial deposit, leave this at 0.
- Enter your Monthly Withdrawal (optional). The reverse case — if you've been pulling money out regularly, enter that average monthly amount. Leave at 0 if you've never withdrawn.
- Enter the Investment Period in years. Count from the day you made the initial investment to today. This is what turns your total return into a fair, per-year comparison figure later.
- Enter your Current Investment Value. Pull this straight from your account statement or app — whatever the position is worth right now.
- Click Calculate. You'll instantly see your Total Return, Profit/Loss in dollars, Profit/Loss as a percentage, your Annualized Return (CAGR), and the Total Amount Invested it used to get there.
There's no sign-up, no spreadsheet, and nothing to download — it's meant to be answered in under a minute, using numbers you already have in front of you.
The Formula, Broken Down Simply
Behind the scenes, the calculator runs three separate calculations, each building on the last. None of them require anything beyond arithmetic and one exponent.
Step 1 — Work out what you actually invested (your cost basis):
Total Invested = Initial Investment + (Monthly Contribution × Months) − (Monthly Withdrawal × Months)
Step 2 — Compare that against what it's worth now (this is your Total Return):
Profit or Loss ($) = Current Value − Total Invested
Total Return / Profit or Loss (%) = (Profit or Loss ÷ Total Invested) × 100
This Total Return percentage is the headline number the calculator leads with, because it answers the question people actually asking: "am I up or down, and by how much?" The dollar figure and the percentage are two views of the exact same result, the percentage is just what makes it comparable regardless of how much money was involved.
Step 3 — Spread that return evenly across each year (CAGR):
Annualized Return (%) = [ (Current Value ÷ Total Invested) ^ (1 ÷ Years) − 1 ] × 100
That last step is the one people usually skip when doing this math and it's the most important one. A 30% total gain sounds impressive, but 30% over one year and 30% over twelve years tell completely different stories about how hard your money is working. CAGR converts any holding period into a "per year, on average" figure, so you can line it up next to a savings account rate, an index fund's long-term average, or another investment entirely.
How the Three Steps Connect
A Simple Story: Two Coworkers, Two Very Different Returns
Aisha and her coworker Ben both opened brokerage accounts the same month, 7 years ago. At a lunch break, they compare notes and both accounts show around $19,500 today. Aisha assumes they've done about the same. Here's what actually happened when she ran her numbers through the calculator.
Aisha's numbers: she started with $5,000, added $150 a month automatically, never withdrew a cent, and her account is worth $19,500 after 7 years.
Step 1 — Total Invested: 7 years = 84 months. $150 × 84 = $12,600 in contributions. $5,000 + $12,600 = $17,600 total invested.
Step 2 — Total Return: $19,500 − $17,600 = +$1,900 profit, which works out to a Total Return of +10.80% over the whole seven years.
Step 3 — CAGR: (19,500 ÷ 17,600) ^ (1/7) − 1 ≈ +1.48% per year.
At a glance, a Total Return of +10.8% sounded fine to Aisha. But once she saw that the annualized return is under 1.5% a year which is below what a basic high-yield savings account was paying over the same stretch, she realized her money had mostly just been sitting there, not really growing.
Ben, it turned out, had put in a $4,000 as initial amount with no monthly contributions at all, and his same $19,500 balance giving him a Total return of +387.5%, annualized return of 25.4%.
Same ending number. But very different investments returns. This calculator helps you with the actual total return of your investment with additional the options to calculate "money you added / withdrawal" from "money the investment made" before it tells you anything about performance.
Common Questions
What's the difference between Profit/Loss (%) and Annualized Return (CAGR)?
Profit/Loss (%) is your total gain across the entire time you've held the investment — one lump figure. CAGR spreads that same result evenly across each year, so you get a "per year" pace. When you're comparing two investments held for different lengths of time, CAGR is the fairer number to use.
Do I have to fill in the contribution and withdrawal fields?
No — both default to $0. If you made a single lump-sum investment and never touched it, leave them blank and the calculator treats your initial investment as your full cost basis.
Why isn't "Total Amount Invested" the same as my Initial Investment?
Because it accounts for everything that happened afterward. If you've been contributing regularly, your real invested capital is higher than that first deposit, which changes what counts as actual profit.
Can I use this for something other than stocks?
Yes. It only needs dollar figures and a time period, so it works equally well for a 401(k), a crypto wallet, a rental property, or a plain savings plan — anything where you can estimate what went in, what (if anything) came out, and what it's worth today.
Why does it need the Investment Period if I already know the current value?
The dollar and percentage profit/loss don't need the time period — but CAGR does. A 25% gain over one year is excellent; the same 25% gain over fifteen years is fairly ordinary. Without the holding period, there's no way to tell those two apart.
Related Calculators
If you're digging into how an investment is performing, these tools on Smart Calculators Hub pair naturally with this one:
- Compound Interest Calculator (With Increasing Contributions) — project how a new investment could grow going forward, rather than measuring one you already hold.
- CAGR Calculator With Extra Cash Flows — a deeper look at annualized return when your contributions or withdrawals are irregular rather than a fixed monthly amount.
- Retirement Savings Goal Calculator — take the return you just calculated and use it as an input assumption for planning ahead.
- Reverse Discounted Cash Flow (DCF) Calculator — for stock investors, see what growth rate the market is already pricing into a company's share price.
Disclaimer: This article and the calculator it describes are for educational and informational purposes only. Actual investment results vary based on individual circumstances, fees, taxes, timing, and market conditions. Nothing here should be treated as financial, investment, or tax advice.