If you had put $217.39 a month into TSLA for 120 months (10 years), from September 2016 through July 2026, your total principal of $26,086.96 would have grown to approximately $243,436.34 before taxes.
That's a return of roughly +833.2%. But within those 10 years there were drawdowns of more than -70%, and the era's returns were heavily shaped by the early high-growth phase of the EV market.
These are historical returns and do not guarantee future results — the calculation method and assumptions are laid out transparently below.
Whether you drive a Tesla or simply follow Elon Musk's every move, you've probably wondered at some point: "What if I'd just bought a little bit every month?" We used TSLA's actual monthly closing prices (adjusted for stock splits) to look back at exactly what the last 10 years would have delivered.
The Results
(10 years)
| Item | Value |
|---|---|
| Calculation period | September 2016 – July 2026 (120 months) |
| Total principal | $26,086.96 |
| Pre-tax final value | approx. $243,436.34 |
| Pre-tax gain | approx. +$217,349.38 |
| Pre-tax cumulative return | approx. +833.2% |
| TSLA closing price, July 2026 | $425.30 |
Methodology and Assumptions
- We used TSLA's actual monthly closing prices from September 2016 through July 2026 (split-adjusted).
- We assumed a purchase of $217.39 on the same date every month.
- Each month's contribution buys shares at that month's closing price; those shares accumulate, and the entire position is valued at the final month's (July 2026) closing price.
- This is a pre-tax, simplified calculation that does not account for trading fees, currency conversion fees, capital gains tax, or slippage.
What Actually Happened Over These 10 Years
This decade was never a smooth, steady climb. In the first half of 2019, production concerns drove the stock down by nearly half, and then in 2020–2021 it exploded higher as Model 3 production ramped up and stabilized. In 2022, rising interest rates, uncertainty around the Twitter (now X) acquisition, and worries about slowing demand in China combined to push the stock down more than -70% from its peak. After that, enthusiasm for robotaxis, Optimus (the humanoid robot), and FSD (Full Self-Driving) pushed the price back up again.
Through this rollercoaster, buying steadily every month had the effect of accumulating more shares during the sharpest declines. But that's an easy observation to make in hindsight — actually holding on through those downturns in real time was far harder than the numbers make it look.
Run the Numbers With Your Own Assumptions
If you'd like to adjust your own monthly contribution, time horizon, and expected return to compare scenarios, try the calculator below.
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This article is not a solicitation to buy any specific stock. It is an educational, reference-only simulation using actual historical prices. Investment decisions and their outcomes are the sole responsibility of the investor. Data source: Yahoo Finance monthly closing prices (adjusted). © 2026 EZLONG.