The honest answer: more than most people want to hear. Every cash-secured put locks up the full strike price × 100 in your account — $4,500 for a $45 strike, $17,000 for NVDA, $24,500 for AAPL, and $35,500 for MSFT. A $5,000 account limits you to a handful of stocks under $50 per share. The strategy becomes barely viable around $25,000 with proper position sizing and genuinely comfortable above $50,000. Below $10,000, bull put spreads are the honest path forward. Read the full position sizing guide for the rules behind these numbers.
In a cash account or IRA, your broker holds 100% of the potential assignment cost — strike price × 100 shares — for the life of the trade. Here's what that looks like at real April 2026 stock prices for ~30-delta strikes:
Now apply the position sizing rule: no single position should consume more than 5–10% of total account equity. To sell one CSP at a $45 strike within a 5% allocation, you need a $90,000 account. At 10%, you need $45,000. For AAPL at a $245 strike, those numbers are $490,000 and $245,000. This is why small accounts can't do CSPs properly — a single contract on any mid-priced stock consumes the entire portfolio.
Under $5,000. Your universe is stocks under $50, but even then one contract eats 22–100% of your account. Ford at $12 needs $1,100 in collateral — 22% of a $5,000 account in a single position. SoFi at $17 needs $1,600 — 32%. You can't diversify. You can't follow position sizing rules. One assignment eliminates your ability to sell new premium for weeks. Option Alpha's research recommends accounts under $25,000 focus on defined-risk strategies. The realistic answer: bull put spreads. A $5-wide BPS ties up $500 per position, letting you run 5–8 simultaneous trades across different sectors on the same capital that one CSP would consume entirely.
$5,000–$10,000. You can sell puts on Ford ($1,100), SoFi ($1,600), Pfizer ($2,600), and a few other names under $30 per share. But concentration risk is unavoidable — two positions at $2,500 each consumes 50–100% of your capital, leaving zero cash buffer. A single assignment locks up half the account. The $5-wide bull put spread remains your primary tool at this size — 10–15 simultaneous positions for the same capital one or two CSPs would consume. If you insist on CSPs, deploy no more than 50% of capital and cap yourself at two positions. → See live tickers tradable on a $5K account
$10,000–$25,000. CSPs become barely viable. A $20,000 account handles 2–3 positions: Pfizer at $26 ($2,600), Intel at $45 ($4,500), Verizon at $42 ($4,200). That's $11,300 deployed — 57% of the account — on just three names. Sector diversification is limited to whatever three stocks happen to fit your budget. The temptation trap at this tier is margin: a Reg T margin account cuts collateral by 80–86%, making it look like you can run 15 positions. But margin amplifies losses in exactly the drawdown scenarios where you need cash. Practical mix: 2 CSPs on conviction stocks you'd genuinely own plus 3–5 bull put spreads for diversification. → See live tickers under $5K collateral
$25,000–$50,000. The first genuinely viable CSP tier. A $40,000 account at 10% per position supports 5–8 positions on stocks under $60 — Ford, Pfizer, Intel, AT&T, Verizon, SoFi, Cisco — with 40–50% held in reserve. You can spread across 3–4 sectors for the first time. Monthly gross premium on deployed capital at 16-delta, 30–45 DTE runs about 0.8–1.5% of strike. With 50–60% deployment, that's 5–9% annualized on total account equity before losing months. Not the 2% monthly some influencers promise. → See live tickers tradable on a $25K account
$50,000–$100,000. The comfortable tier. 8–12 positions become feasible, mixing CSPs on conviction names with BPS on expensive stocks you can't fully collateralize. A $75,000 account can sell puts on NVDA ($17,000 collateral) and AMZN ($22,000) while keeping 40–50% in reserve. You finally achieve genuine sector spread — tech, healthcare, financials, energy, consumer staples. Deploy no more than 60–70% of capital at any time. Estimated annual return on total equity: 6–10%. → See live tickers under $25K collateral
$100,000+. Full strategy implementation. 12–20 positions with staggered expirations across weekly and monthly cycles. The entire stock universe opens — AAPL ($24,500 per contract), GOOGL ($31,800), MSFT ($35,500), plus ETFs like SPY ($66,000) and QQQ ($55,000). Portfolio margin becomes available above $110,000–$150,000 depending on broker. At this level, the CBOE PutWrite Index's 6.9% annualized return (2007–2026) with two-thirds the volatility of the S&P 500 becomes a realistic, achievable benchmark — not an abstraction.
The same $45-strike put on a $50 stock with $1.20 in premium requires vastly different capital depending on account type:
The Reg T formula: premium received + (20% × stock price) − out-of-the-money amount, or premium + 10% of strike — whichever is greater. Portfolio margin stress-tests positions across a ±15% price move and charges the largest theoretical loss. Among major brokers offering portfolio margin: IBKR ($110K minimum), Schwab ($125K), Tastytrade ($125K), and Fidelity ($150K). Robinhood does not offer portfolio margin.
But margin is a trap for undisciplined accounts. An 86% reduction means you can sell 7× more contracts on the same capital. That's 7× the premium in good months and 7× the losses in bad ones. The March 2020 crash obliterated accounts that treated margin headroom as permission to sell more. Read more about why this happens in our position sizing guide.
Cash drag. Collateral sitting in your brokerage account loses purchasing power if it earns zero. At current T-bill yields of ~3.7%, $50,000 in idle CSP collateral represents $1,850 per year in forgone risk-free income. Some brokers help — Fidelity sweeps collateral into SPAXX (money market), and IBKR pays interest on settled cash balances. Others pay near-zero. The difference compounds over years.
Opportunity cost vs. buy-and-hold. SPY has returned ~10.5% annualized over the past 20 years. The CBOE PutWrite Index returned 6.9% over its live history (2007–2026) — nearly identical volatility-adjusted returns but 3.6 fewer percentage points annually in absolute terms. In the 2013 and 2019 bull runs, the gap exceeded 18 points. CSPs shine in sideways and mildly bearish environments: the PUT Index beat the S&P by 10.4 points in 2022 and 5.0 points in 2015. In strong bulls, you're leaving significant money on the table. For accounts under $25,000, parking capital in T-bills at 3.7% and running a handful of bull put spreads may genuinely beat an undiversified, all-in CSP approach on a risk-adjusted basis.
Four mistakes destroy small CSP accounts. Selling puts on stocks you wouldn't own — when assignment hits, you hold shares you don't want in the worst possible market conditions. Chasing high-IV meme stocks for fat premium — implied volatility is high because the risk is real, and thin premium cushions evaporate in sharp selloffs. Deploying 90%+ of available capital — in March 2020, SPY dropped 34% in 23 trading days; fully deployed accounts had no cash to manage, roll, or ride out positions, while accounts holding 50% in reserve weathered the storm and recovered within months. Using margin to compensate for small account size — leverage magnifies losses in exactly the crash scenarios when amplified losses are fatal.
Stocks don't drop 30% every year, but they do drop 30% eventually. Here's the per-contract damage when you're assigned after a 30% crash in the underlying:
In a $10,000 account, the $600 Pfizer loss is 6% of equity — a setback. The $3,910 NVDA loss is 39% of equity — a catastrophe. Position sizing isn't a suggestion. It's the difference between a bad month and a blown account.
IRAs require fully cash-secured puts — no margin, no shortcuts. This enforces exactly the discipline that destroys undisciplined taxable margin accounts. Every major broker allows CSPs in IRAs: Schwab at Level 0, Fidelity at Level 2, Tastytrade and IBKR with standard options approval, Robinhood at Level 2. Spreads are also available in IRAs at all five (Schwab requires $5,000 minimum and Level 2; Fidelity requires a separate spreads agreement plus a $2,000 reserve).
The real advantage is tax. CSP premium is short-term capital gains in taxable accounts — up to 37% federal. In a Roth IRA, it's tax-free. In a traditional IRA, it's tax-deferred. Someone collecting $6,000 annually in premium saves $1,500–$2,200 per year in taxes by running the strategy inside a Roth. Over a decade, that tax delta alone compounds into a full account tier's worth of extra capital.
Yield estimates assume 16-delta puts at 30–45 DTE, managed at 50% of max profit, with 50–60% capital deployment. These are returns on total account equity, not deployed capital alone. Roughly 30% of gross premium survives as net profit after losing months — you need to collect $3 in premium for every $1 of actual return. The full breakdown of which delta works best at each tier is in our delta cheat sheet.
Cash-secured puts are a capital-intensive strategy. The math is non-negotiable: $4,500 minimum per contract on a modest $45 strike, $24,500 for AAPL, $35,500 for MSFT. Below $25,000, bull put spreads give you the same volatility risk premium exposure with 80–90% less capital at risk per position. The uncomfortable truth is that most "small account CSP" content ignores position sizing entirely — and position sizing is what separates a strategy from a gamble. Match your account size to the strategy that fits it, not the strategy you wish you could run.