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Trading and options · Put payoff at expiration

Put Option Payoff Calculator

Created by Arunangshu DasReviewed

Calculate expiration payoff and net profit or loss for a long or standalone short put.

See how premium, total fees and contract size affect break-even.

Put position at expiration

Use the same major currency for all amounts. Enter decimals with a period and no grouping separators.

Formatting only. The calculator performs no currency conversion.

Enter premium per unit and the total fees for all contracts. Use zero if no fees apply.

Expiration payoff and net profit or loss

Enter your option assumptions or load the worked example.

The model values a standalone put at expiration. It excludes pre-expiry pricing, exercise, assignment, collateral and financing.

Learn to calculate a put payoff

Follow worked examples and see how intrinsic value differs from net profit.

Read the put option payoff guide

Formula and methodology

Put intrinsic value per unit = max(strike − expiration price, 0).

Multiply max(strike minus expiration price, 0) by contracts and units per contract to find total intrinsic value. Long P&L equals intrinsic value less premium paid and fees. Short P&L equals premium received less intrinsic value and fees. Deduct total position fees once.

Definitions

A put has positive intrinsic value at expiration below the strike. Premium is paid by the buyer and received by the seller. Enter the premium per underlying unit and the actual number of units each contract covers.

Verified worked examples

Two 100-unit contracts at strike 50 and premium 3 cost or collect 600. At expiration price 46, intrinsic value is 800. With total fees of 10, the long gains 190 and the standalone short loses 210. Their break-even prices are 46.95 and 47.05 respectively.

Interpretation

At zero underlying price, the long has its best result and the short its worst. At or above strike, the long has its worst result and the short its best. Both results are signed and can have the same sign. If neither endpoint is zero and their signs match, there is no break-even.

Inputs and interpretation

Choose long or standalone short. Enter the strike and expiration price in the same major currency as premium and fees. Enter the contract count and units per contract separately. Enter zero explicitly if no fees apply.

Assumptions and limitations

One position held to a single expiration checkpoint with a nonnegative underlying price. There is no compounding or time conversion. Market selection changes only currency presentation.

Supported domain and common mistakes

The strike must be positive. Money inputs are capped at 1 trillion with up to 12 decimal places. Contract count and multiplier each range from 1 to 1 million. Repeating break-even prices are displayed approximately to 40 significant digits.

Check whether the quote is per unit or per contract. Convert a total contract premium to a per-unit input first. A put can finish in the money and still lose money for the buyer when intrinsic value is smaller than premium and fees.

Frequently asked questions

How do I calculate a long put’s profit?
Multiply the positive part of strike less expiration price by total units, then subtract the total premium and fees.
Why can an in-the-money put lose money?
For a buyer, positive intrinsic value may still fall short of premium and fees. At strike 50 and expiration price 49, a premium of 3 already exceeds intrinsic value of 1 before fees.
Can a put break even at an underlying price of zero?
Yes. For a long, the maximum intrinsic value may exactly equal total premium and fees. For a short, premium after fees may exactly cover the full strike liability.
What if fees consume all of my short put premium?
At or above the strike the position breaks even across a whole range. Below the strike, the position loses the full intrinsic amount. If fees exceed premium, the position loses money even at or above strike.
What is a standalone short put’s worst outcome?
At a zero underlying price, subtract the full strike liability and fees from the premium collected. This result can be a substantial loss.
Does changing the display market change my multiplier?
The market selector changes currency formatting only. Use the multiplier and quotation units listed for the contract you are modeling.

Sources and educational scope

Educational expiration model for a single put. It excludes pre-expiry valuation, exercise and assignment, settlement mechanics, margin, financing, taxes and currency conversion. A hedged position or spread has additional cash flows.

Reviewed . AI-assisted content under operator editorial responsibility. No independent expert financial review is claimed.

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