Tesla Stock (TSLA) Investment Calculator
What would a TSLA position bought at the IPO or any year-end since be worth today — as a lump sum or steady yearly buys — and how does it compare with an S&P 500 index fund? Then test target prices and estimate the tax on a sale. Values are shown in pounds, converted from TSLA's US-dollar prices.
Not investment advice. This is an educational calculator using approximate, split-adjusted year-end prices. Past performance does not predict future results, TSLA has been extremely volatile, and target prices are hypothetical. Talk to a licensed professional before making investment or tax decisions.Speak to a regulated financial adviser or tax adviser before making investment or tax decisions.
Growth of your investment
Year-end values, price onlyYear by year
Portfolio value vs money put in
Valued at each year-end closePurchases
Position value at different prices
Target-price table
Where the gain goes
Tax breakdown
Short-term vs long-termWays to cut the bill
Same sale, both holding periodsSame gain, different approachesPrice data used (approximate, split-adjusted)
TSLA and the S&P 500 are priced in US dollars, so the prices below are in USD. Pound values elsewhere on this page use the approximate year-end GBP/USD rates in the last column (or today's rate if you untick historical rates).
TSLA year-end closes are adjusted for the 5-for-1 (2020) and 3-for-1 (2022) splits. The June 29, 2010 IPO price of $17.00 equals about $1.13 after splits. S&P 500 figures are index levels (price only — dividends, which have added roughly 1.5–2% a year, are not included). Values are rounded and may differ slightly from your broker's data.
How this is calculated
- Currency: TSLA is bought in US dollars. Your pounds are converted at the purchase-date rate (approximate year-end GBP/USD, or today's rate if you untick historical rates) and the value is converted back at today's rate, so a weaker pound boosts sterling returns and a stronger one reduces them. Dealing and FX fees aren't included.
- Lump sum: shares = amount ÷ purchase price; value = shares × today's price. CAGR = (value ÷ amount)1/years − 1, with years measured from the purchase date to today.
- S&P 500 comparison applies the same dates to the index level, as a stand-in for a low-cost index fund. Because dividends are excluded from both, TSLA (which pays none) is compared fairly on price, but the index fund's true return would be somewhat higher.
- Regular investing buys the same pound amount at each year-end close; the comparison lump sum puts the whole total in at the first purchase date.
- DCA buys the same dollar amount at each year-end close; the comparison lump sum puts the whole total in at the first purchase date.
- Target price: implied CAGR = (target ÷ today's price)1/years − 1. Market cap uses about 3.2 billion shares outstanding (approximate; dilution changes it).
- Capital Gains Tax: gain = sale proceeds − purchase cost (both in pounds). The annual exempt amount (£3,000) comes off first; what's left is taxed at 18% while it fits in your remaining basic-rate band (income up to £50,270) and 24% above that. Shares in an ISA are free of CGT. The model ignores the personal-allowance taper above £100,000, allowable costs such as dealing fees, and share-matching rules.
- Capital-gains tax uses approximate 2026 federal long-term brackets (0% / 15% / 20%), stacked on top of your other taxable income. Short-term gains are taxed at the marginal rate you enter. NIIT applies 3.8% to the part of the gain above $200,000 of income (single/head of household) or $250,000 (joint). State tax is a flat percentage you enter.