0DTE Options Profit and Loss at Expiration Calculator
· 4 min read
This 0DTE options calculator shows what a call or put is worth when it expires, and what that means for your profit or loss. Enter the option type, strike, premium paid or received, number of contracts and whether you are long or short. The tool returns the profit or loss at a final price you choose, the breakeven price and the maximum loss, then lets you drag a slider to see how the result changes as the underlying moves.
Results at different expiration prices
| Move vs strike | Underlying price | Profit or loss |
|---|
How the numbers are calculated
One standard equity or ETF option contract usually controls 100 shares, so the premium per share is multiplied by 100 and then by the number of contracts. At expiration a call is worth the underlying price minus the strike, never below zero. A put is worth the strike minus the underlying price, never below zero. A long position’s profit is that value minus the premium paid. A short position keeps the premium and gives back the same value.
The breakeven for a call is the strike plus the premium, and for a put it is the strike minus the premium. A buyer’s maximum loss is the premium paid, which happens when the option expires worthless. A short call has no upper limit on loss, and a short put can lose up to the strike times 100 per contract minus the premium received. Check the contract specifications for the product you trade, since multipliers and settlement can differ.
Illustrative example, not a real trade or a recommendation: a long call with a strike of 500 bought for a premium of 1.20 has a breakeven of 501.20. If the underlying finishes at 502, the call is worth 2.00, so the profit is 0.80 per share, or 80 dollars per contract before fees.
Why expiration day payoff looks different from the live price
On the day an option expires, little time value remains, so its price tracks the distance between the underlying and the strike much more closely than it does earlier in the week. The payoff at expiration is a hard rule, but the option’s price during the day can swing sharply on small moves in the underlying. This calculator shows only the final payoff, not the path to it. If you exit before the close, your result depends on the price you get at that moment, not on this table.
Limits and assumptions
The calculator ignores commissions, exchange fees, taxes, slippage and the bid-ask spread. It does not model early exercise or assignment, which can affect short positions before expiration, and it does not handle dividends. It treats the option as held to the final settlement and assumes a 100 share multiplier. It does not use implied volatility or any forecast, and it says nothing about where price is likely to go. Expiry-day option values move fast, so the number you see on a screen minutes before the close can be far from the final payoff.
Use the slider and the table to understand the shape of a position: where it starts to profit, how fast losses grow and what the worst case is. Then confirm the real numbers in your broker’s platform before you place anything. This page is for education only.
Risk note
Trading involves risk of loss. Options that expire the same day can lose their entire premium within hours, and short options can lose more than the premium collected. Only use money you can afford to lose, and read the options disclosure documents from your broker.
Summary
A 0DTE payoff is the intrinsic value at expiration minus the premium for a long position, and the reverse for a short one. The breakeven sits one premium away from the strike, and the buyer’s maximum loss is the premium. Fees, early exit and intraday price swings are not included, so treat the output as a map of the position and not a forecast.
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