Free Collar Calculator

What Is a Collar Strategy?

A collar strategy is a three-part options position designed to protect a long stock holding against significant losses while capping upside potential. It combines owning shares of the underlying stock, buying a protective put option (the "floor"), and selling a covered call option (the "cap"). The result is a position that "collars" your profit and loss within a defined range.

Collars are popular among investors who have seen their stock appreciate and want to lock in gains without selling. The put provides insurance against a price drop, while the call premium helps offset — or even fully cover — the cost of that insurance.

How to Calculate Collar Profit and Loss

Understanding the math behind a collar is essential for evaluating whether the trade makes sense for your portfolio. Here are the key formulas:

• Net Premium: Call Premium Received × Call Contracts × 100 − Put Premium Paid × Put Contracts × 100. A positive value means net credit; negative means net debit.
• Cost Basis: Purchase Price − Net Premium per Share. This is your effective cost after accounting for the options premiums.
• Max Profit: (Call Strike − Purchase Price) × Shares + Net Premium. This occurs when the stock price is at or above the call strike at expiration.
• Max Loss: (Purchase Price − Put Strike) × Shares − Net Premium. This occurs when the stock price is at or below the put strike at expiration.
• Breakeven: Purchase Price − Net Premium ÷ Shares. The stock price where your total P/L equals zero.

How to Use This Collar Calculator

1. Enter the Stock Symbol: Type a ticker symbol and click "Get Price & Options" to fetch the current stock price and available option chains for both puts and calls.
2. Select Option Contracts: Choose an expiration date, then select a put contract (floor) and a call contract (cap) from the option chains. The calculator auto-fills strike prices, premiums, and implied volatility.
3. Adjust Parameters: Fine-tune the purchase price, number of shares, contract counts, and other inputs as needed.
4. Review Results: The calculator instantly displays max profit, max loss, breakeven, net premium, Greeks, and an interactive payoff diagram showing collar P/L vs. stock-only P/L.

Why Use Our Collar Calculator?

Choosing Strike Prices for a Collar

Strike selection determines the width and cost of your collar. Here is how different approaches affect your trade:

• Narrow Collar: Put and call strikes close to the current price. Provides tight protection but limits upside significantly. Often results in a net credit or zero cost.
• Wide Collar: Put strike well below and call strike well above the current price. Allows more room for the stock to move but provides less downside protection. Usually results in a net debit.
• Zero-Cost Collar: Strike prices chosen so that the call premium received equals the put premium paid. No net cost for the options, but the trade-off is typically a narrower profit range.

How Implied Volatility Affects Collars

Implied volatility (IV) affects both legs of the collar differently:

• High IV Environment: Both put and call premiums are elevated. The call you sell generates more income, which can offset the higher put cost. High IV can make zero-cost collars easier to construct.
• Low IV Environment: Premiums are cheaper across the board. The put costs less, but the call generates less income. You may need to accept a narrower collar or pay a net debit.
• IV Skew: Puts often have higher IV than calls (the volatility skew). This means the put may cost more than a same-distance call, making the collar a net debit in many cases.

Time Decay and the Collar Strategy

Time decay (Theta) has a mixed effect on collars because you are both long and short options:

• The long put loses value over time (negative theta), which hurts your position.
• The short call also loses value over time (positive theta for the seller), which benefits your position.
• The net theta is often close to zero, making collars relatively insensitive to time decay compared to single-leg strategies.
• As expiration approaches, the collar's P/L profile converges toward the kinked expiration payoff line shown on the chart.

Collar vs. Other Protective Strategies

Understanding how the collar compares to alternatives helps you choose the right hedge:

• Collar vs. Protective Put: A protective put alone provides unlimited upside but costs more. The collar sacrifices upside beyond the call strike to reduce or eliminate the hedging cost.
• Collar vs. Covered Call: A covered call alone generates income but provides no downside protection. The collar adds a put floor at the cost of some or all of the call income.
• Collar vs. Stop Loss: A stop loss can be triggered by temporary dips and forces you to sell. The collar provides guaranteed protection through expiration without selling your shares.