Options Premium: Quotes, Spreads & Execution
An option's premium is quoted per share, but one contract controls 100 shares. The bid, ask, midpoint and your fill are four different numbers, and the difference affects results.
Educational content. Last reviewed October 3, 2026. Not investment advice.
Per-share quote, per-contract cash
A quote of $2.50 means $2.50 per share, or $250 per contract.
Cash per contract = quoted premium x 100 Midpoint = (bid + ask) / 2 Spread % = (ask - bid) / midpoint
Worked example
Bid $2.40, ask $2.60.
| Item | Per share | Per contract |
|---|---|---|
| Bid (selling price) | $2.40 | $240 |
| Midpoint | $2.50 | $250 |
| Ask (buying price) | $2.60 | $260 |
| Spread | $0.20 (8.0% of midpoint) | $20 |
Why the fill differs
A seller may need to accept near the bid, and a buyer near the ask. TradingSignalAI's income examples use bids for sold options for conservatism. A displayed premium is a timestamped quote, not an execution price.
Which price can you actually trade?
For a hypothetical $1.20 bid and $1.40 ask, the $1.30 midpoint is a reference, not an executable promise. Selling at the bid produces $120 per standard contract before fees; buying at the ask costs $140. A midpoint calculation therefore differs from the conservative sell-side or buy-side economics.
TradingSignalAI's weekly sell-option examples use the bid. Other structures must account for the executable side of each leg. A multi-leg order may trade as a package, and the achievable combined price still depends on the market. Inspect current quotes with your broker before entering a limit order.
Consider the spread relative to the premium
A $0.20 bid-ask gap is about 15.4% of a $1.30 midpoint. That is meaningful friction even if the contract appears inexpensive. A small nominal spread can be a large percentage of a low premium, so compare both dollar and percentage measurements.
Volume and open interest provide context but do not guarantee a fill. A quote can be stale, its displayed size can change and liquidity can deteriorate during an event. Include commissions and closing costs when comparing potential premium income with the capital and risk of the position.
Visual explainer
Premium relative to capital
Covered call example, hypothetical inputs.
Premium
$420
Capital
$20,000
100 shares at $200.00
Return
2.10%
13 days
Bar width = premium as a share of capital. $420 / $20,000 = 2.10%, or 0.162% per day over 13 days
Premium income only, before fees, taxes and any stock gain or loss. Per-day figures compare trades and do not promise the trade can be repeated.
Risks
- Wide spreads can consume expected income.
- Quotes can change before an order reaches the market.
- Commissions and fees apply per contract.
Research tools that use this concept
- Covered Call Screener & Trading SignalsFind covered calls against recorded share lots. Compare premium, delta, strike distance and expiration, with clear assignment and stock downside risks.
- Cash-Secured Put Screener & SignalsResearch cash-secured puts with premium, collateral, delta and expiration metrics. Understand breakeven, assignment and the risk of owning the shares.
Related guides
- Options Expiration, DTE & Return ComparisonsUnderstand days to expiration, exercise and assignment timing, and why normalized or annualized returns are comparisons rather than income promises.
- Implied Volatility: Options Pricing & LimitsUnderstand implied volatility, its relationship to premiums and expected movement, and why volatility estimates and historical proxies have limitations.
- Covered Calls: Premium, Breakeven & AssignmentLearn how covered calls work, calculate premium and stock-position payoff, and understand capped upside, stock downside and early assignment.
- Options Academy: Strategies, Metrics & RiskLearn options strategies, Greeks, volatility, premium and assignment. Work through labeled examples and connect the concepts to TradingSignalAI's research tools.
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