A “good” theta depends entirely on whether you’re buying or selling options. For sellers, theta is your daily income, so higher is better. For buyers, theta is a daily cost, so lower (closer to zero) is better. There’s no single number that qualifies as good across all strategies, but there are concrete benchmarks and ranges that experienced traders use to evaluate whether a position’s theta is working for or against them at the right pace.
What Theta Actually Tells You
Theta measures how much an option’s price drops each day purely from the passage of time, assuming nothing else changes. If a call option has a theta of -0.05, it loses about $5 per contract per day (since each contract covers 100 shares). Every option has negative theta from the holder’s perspective because time value always erodes as expiration approaches. Sellers collect that eroding value, so they experience theta as a positive number in their portfolio.
The key thing to understand is that theta isn’t constant. It accelerates as expiration gets closer. An option with 90 days left might lose a few cents a day, while the same option with 10 days left could lose 20 or 30 cents daily. This acceleration is steepest in the final 30 days before expiration, which is why that window matters so much for both buyers and sellers.
Good Theta for Option Sellers
If you sell options to collect premium (through strategies like short puts, covered calls, iron condors, or credit spreads), you want theta working in your favor as aggressively as possible without taking on excessive risk. There are two useful ways to evaluate this: at the individual position level and at the portfolio level.
Individual Position Level
For a single position, “good” theta is relative to the premium you collected and the risk you took. A short option that earns $3 to $5 per day in theta on a $100 credit is decaying at a healthy pace. The sweet spot for entering premium-selling trades is typically between 30 and 45 days to expiration. At that point, theta decay is accelerating meaningfully but you still have enough time for the trade to work without being fully exposed to the wild price swings that happen in the final week.
At-the-money options carry the highest theta because they hold the most time premium. As you move further in-the-money or out-of-the-money, theta drops off because those options have less extrinsic value to lose. Sellers who want maximum daily decay often target near-the-money strikes, though this also comes with higher directional risk.
Portfolio Level
A more practical benchmark for active premium sellers is portfolio-wide theta as a percentage of your total account value (your net liquidating value). A commonly cited target is 0.1% to 0.5% of your account value per day. So if your account is worth $100,000, you’d aim for your combined positions to generate $100 to $500 in daily theta.
Staying at the lower end of that range (0.1% to 0.2%) is more conservative and leaves room for adverse moves. Pushing toward 0.5% means you’re collecting more daily income but also holding more short premium, which increases your exposure if the market moves sharply against you. Most traders using this framework treat the 0.1% to 0.5% range as guardrails rather than a target to maximize.
Good Theta for Option Buyers
When you buy calls or puts, theta is a cost you pay every day you hold the position. A “good” theta for buyers is one that’s as small as possible relative to the potential profit from a directional move.
The most effective way to reduce theta’s drag on long options is to buy contracts with more time until expiration. An option with 90 or 120 days left decays slowly, losing only a small fraction of its value each day. The same strike with 14 days left can lose 1% to 3% of its value daily just from time passing. Long-dated options (sometimes called LEAPS when they extend a year or more) experience very little daily decay, which gives your trade thesis more time to play out.
Moneyness matters too. At-the-money options lose the most time value per day because they have the highest proportion of extrinsic value. Deep-in-the-money options have very little time premium, so their theta is naturally low. If you’re buying options for a directional bet and want to minimize decay, going deeper in-the-money reduces your theta exposure, though it also costs more upfront. Far out-of-the-money options also have low absolute theta, but they have a much lower probability of finishing profitable, so the low theta number can be misleading.
How Theta Interacts With Other Greeks
Theta doesn’t exist in isolation. A position with high theta but also high delta is making a large directional bet, meaning a move against you can wipe out many days of theta income in a single session. Traders who sell premium often look at the ratio between their theta and their delta to gauge whether they’re being compensated enough for their directional risk.
Volatility also plays a role. When implied volatility is high, options are more expensive, which means theta values are larger. Selling options in a high-volatility environment gives you more daily theta, but those elevated prices exist because the market expects bigger moves. A “good” theta number in a calm market looks very different from one during an earnings season or a market selloff.
As a practical rule, evaluate theta relative to the premium at stake. If you sold an iron condor for $2.00 in credit and your daily theta is $0.05, you’d need 40 calm days to fully capture that premium through decay alone. If your theta is $0.10, that timeline drops to 20 days. Faster decay means less time exposed to risk, which generally makes the trade more attractive.
Quick Reference by Strategy
- Covered calls and cash-secured puts: Look for theta that represents meaningful daily income relative to the capital you’ve committed. Selling 30 to 45 days out with near-the-money strikes typically produces the best balance of decay rate and probability of success.
- Iron condors and credit spreads: Theta should be high enough relative to your max risk that the position can reach your profit target well before expiration. Many traders aim to close these at 50% of max profit, so you want theta that gets you there in roughly half the time to expiration.
- Long calls and puts: Keep theta below a level where time decay alone could erode a meaningful portion of your position over your expected holding period. Buying 60 or more days out and slightly in-the-money keeps daily decay manageable.
- LEAPS (options expiring a year or more out): Theta is minimal, often just a few cents per day. This is by design, since these are long-term directional positions where you’re paying for time rather than racing against it.
When Theta Becomes a Warning Sign
For sellers, an unusually high theta on a single position can signal that the option is very close to expiration or that implied volatility has spiked. Both situations carry elevated risk. Gamma (the rate at which delta changes) increases alongside theta near expiration, meaning the position can swing from profitable to deeply underwater on a single intraday move. If your individual position theta looks exceptionally attractive, check whether you’re unknowingly taking on outsized gamma risk.
For buyers, a theta that represents more than 1% to 2% of your option’s value per day is a red flag that time is working aggressively against you. At that decay rate, even a correct directional call may not generate enough profit to overcome the daily erosion. If you find yourself in that situation, you’ve likely waited too long to enter or chosen an expiration that’s too close.