At What Point in an Option’s Life Is Theta Decay Typically the Fastest?

Theta decay accelerates significantly in the final 30 to 45 days leading up to the option's expiration date. For at-the-money (ATM) options, this decay is most pronounced.

As the expiration nears, the uncertainty about the underlying asset's price resolution increases, and the value of that remaining time diminishes rapidly, causing the option's extrinsic value to plummet.

Does Theta Affect In-the-Money, At-the-Money, and Out-of-the-Money Options Equally?
Why Is Theta Highest for At-the-Money Options?
When Is Time Decay Most Severe?
Does Theta Decay Affect In-the-Money, At-the-Money, and Out-of-the-Money Options Equally?
How Does a Deep In-the-Money Option’s Theta Compare to an At-the-Money Option?
Explain the Relationship between Theta and the Calendar Days Remaining until Expiration
Why Does Time Decay Accelerate in the Final Month before Expiration?
What Is the Difference between MTM and Final Settlement?

Glossar