Stock Return Demystified: Capital Gains, Dividends, Taxes, and Fees — All in One Guide

Stock Returns Are More Than “How Much Did It Go Up?”

A 30% price increase sounds great — but your actual take-home return depends on commissions, taxes, and dividends. The real formula:

Total Return = (Sale Price + Dividends Received − Purchase Price − Commissions − Taxes) / Purchase Price × 100

1. Key Numbers at a Glance

Stock Return Essentials

US Brokerage Commission

Most major US brokers (Fidelity, Schwab, Robinhood) now offer $0 stock trades

Ordinary rate

Short-Term Capital Gains

Assets held under 1 year taxed at your regular income tax rate (up to 37%)

0/15/20%

Long-Term Capital Gains

Assets held 1+ year. Most investors pay 15%; high earners pay 20% plus 3.8% NIIT

0/15/20%

Qualified Dividend Tax

Same rate as long-term capital gains for most US investors

Roth IRA Tax on Gains

Qualified distributions from Roth accounts are fully tax-free

~10%/yr

S&P 500 Historical Average

Long-run annualized total return including dividends (since 1926)

2. Stock Return Calculator

주식 수익률 계산기

매수가 (원/주)

매도가 (원/주)

수량 (주)

주당 배당금 (원)

매수 수수료율 (%)

매도 수수료율 (%)

양도세율 (%, 0이면 비과세)

3. Taxable Account vs. Tax-Advantaged Account

Taxable Brokerage vs. Retirement Accounts

구분
	Capital gains taxed at 0/15/20% (long-term) or ordinary rate (short-term)	Traditional IRA/401(k): gains tax-deferred; Roth: gains tax-free
	Dividends taxed in year received (qualified or ordinary rate)	Dividends reinvest tax-free until withdrawal (Traditional) or permanently (Roth)
	Tax-loss harvesting available to offset gains	No tax-loss harvesting benefit inside these accounts
	No contribution limits; fully flexible withdrawals	Contribution limits apply ($7,000/yr IRA; $23,500/yr 401(k) in 2025)

At year-end, you can sell losing positions to realize losses that offset capital gains elsewhere in your portfolio. Key rules:

The wash-sale rule disallows the loss if you repurchase the same or substantially identical security within 30 days
Losses first offset gains of the same type (short/long-term), then can offset up to $3,000 of ordinary income per year
Unused losses carry forward indefinitely

4. US Brokerage Commission Comparison

Broker	Stock/ETF Trade	Options per Contract	Notable Feature
Fidelity	$0	$0.65	No account minimums; fractional shares
Charles Schwab	$0	$0.65	Strong research tools; no minimums
Robinhood	$0	$0	Commission-free options; beginner-friendly
TD Ameritrade / Schwab	$0	$0.65	thinkorswim platform for active traders
Interactive Brokers	$0 (IBKR Lite)	$0.65	Best for international and margin trading

Commission-free brokers generate revenue through payment for order flow (PFOF), which may mean slightly worse execution prices. For most buy-and-hold investors the impact is negligible, but active traders may get better fills at non-PFOF brokers.

5. Dividend Yield vs. Capital Appreciation

Approximate Annual Return Composition by Investment Type (%)

High-Yield Savings / CDs

Dividend Stocks (yield only)

Dividend Stocks (total return)

Growth Stocks (price appreciation)

S&P 500 Index (historical)

6. Tax-Advantaged Account Strategy

Account Type	Key Benefit	Annual Limit (2025)
Traditional IRA	Contributions may be tax-deductible; gains tax-deferred	$7,000 ($ 8,000 age 50+)
Roth IRA	Tax-free growth and withdrawals; no RMDs	$7,000 ($ 8,000 age 50+)
401(k) Traditional	Pre-tax contributions reduce taxable income now	$23,500 ($ 31,000 age 50+)
401(k) Roth	After-tax contributions; tax-free in retirement	Same as 401(k)
HSA	Triple tax advantage: deductible, grows tax-free, tax-free withdrawals for medical	$4,300 individual /$ 8,550 family

7. Stock Return Calculator (Tool)

References

IRS Publication 550 — Investment Income and Expenses: https://www.irs.gov/publications/p550
IRS Capital Gains Tax Rates: https://www.irs.gov/taxtopics/tc409
S&P 500 Historical Returns: https://www.multpl.com/s-p-500-historical-annual-returns
Wikipedia — Rate of Return: https://en.wikipedia.org/wiki/Rate_of_return
FINRA Investor Education: https://www.finra.org/investors