ThetaGo vs Other Covered Call Screeners: Is the Subscription Worth It?

The Short Answer Before We Dig In

ThetaGo is a paid covered call screener that filters stocks by annualized premium yield, delta, and days to expiration. Compared to free alternatives, it saves time — but whether it earns its subscription cost depends entirely on how often you trade and how much premium you leave on the table without it. If you sell covered calls on more than five positions a month, a dedicated screener almost always pays for itself. If you hold one or two positions and rarely roll them, a free broker tool may be enough.

What a Covered Call Screener Actually Does

A screener does one job: it ranks option contracts by criteria you set so you do not have to open fifty option chains by hand. The useful filters for covered call writers are annualized return on the position, delta of the short call (which tells you how likely the stock is to get called away), implied volatility rank (IVR), days to expiration (DTE), and bid-ask spread width.

Bid-ask spread matters more than most new traders realize. A contract showing a $0.50 midpoint premium with a $0.20-wide spread means you may only fill at $0.40 in a slow market. That is an 20% haircut before you even start. Good screeners surface this. Basic broker screeners often do not.

The Options Industry Council (OIC) notes that liquidity — measured partly by tight spreads — is one of the most important factors in options execution quality. A screener that filters on spread width is giving you OIC-grade guidance built into the workflow.

How ThetaGo Stacks Up Against the Main Alternatives

There are roughly four tiers of tools retail covered call writers use:

**Tier 1 — Free broker screeners (Thinkorswim, Fidelity, IBKR):** These are powerful but general-purpose. They require you to build and save your own scans. Thinkorswim's thinkScript can replicate almost anything ThetaGo does, but it takes hours to set up and maintain. Most retail traders never get there.

**Tier 2 — Free web screeners (Barchart, Market Chameleon):** Barchart's covered call screener is genuinely useful and free. It shows annualized return, strike, and expiration in one table. The limitation is customization depth and the fact that free tiers throttle data refresh rates. Market Chameleon adds IVR context, which is valuable.

**Tier 3 — Paid single-purpose screeners (ThetaGo, PowerOptions, Covered Calls Advisor):** ThetaGo sits here. It is built specifically for covered calls and cash-secured puts. The interface is cleaner than broker tools, filters are preset for income-focused traders, and it updates in near real time during market hours. PowerOptions has been around longer and offers more educational content alongside the screener. Covered Calls Advisor skews toward conservative, lower-delta setups.

**Tier 4 — Full options analytics platforms (OptionStrat, Tastytrade analytics, OptionAlpha):** These go well beyond screening into position modeling and backtesting. They cost more and are more than most pure covered call writers need.

ThetaGo's pricing has ranged in the $20–$40/month range depending on the plan tier. That is roughly one to two contracts' worth of premium on a low-priced stock. The break-even math is straightforward: if the screener helps you find one better trade per month — say, $50 more in net premium than you would have found manually — it pays for itself.

A Worked Example: Finding a Trade on AAPL

Let's say it is a Tuesday morning and AAPL is trading at $213.50. You own 100 shares. You want to sell a covered call expiring in 21 days (roughly three weeks out, a common DTE target for theta decay).

Without a screener, you open the AAPL option chain in your broker and scroll through strikes manually. You notice the $220 call is bid $1.85, ask $1.90. That is a $0.05 spread — very tight, good liquidity. The delta is 0.28, meaning there is roughly a 28% chance AAPL closes above $220 at expiration based on the market's pricing. Annualized return on the premium: ($1.875 midpoint ÷ $213.50) × (365 ÷ 21) = about 15.3% annualized. That looks reasonable.

Now suppose a screener surfaces the $217.50 strike instead. Bid $2.80, ask $2.85. Delta 0.38. Annualized return: ($2.825 ÷ $213.50) × (365 ÷ 21) = about 23.0% annualized. You are taking on more assignment risk (higher delta), but if you are comfortable with AAPL being called away at $217.50 — a price 1.9% above current — the extra $95 in premium per contract is real money.

The screener did not make the decision. You still have to decide how much assignment risk you want. But it surfaced the comparison in seconds instead of minutes. Over 12 months, that time savings and premium optimization compounds significantly.

Note: These prices are illustrative. Always verify live quotes before placing any order. Options prices change continuously.

The Risks You Need to Understand Before Paying for Any Screener

A screener finds high-premium contracts. High premium almost always means high implied volatility, which means the market expects the stock to move a lot. That is a double-edged sword.

If you sell a covered call on a stock with elevated IV and the stock drops 15%, your call premium cushions the loss but does not eliminate it. You still own the stock. FINRA has published investor guidance noting that covered calls limit upside but do not protect against significant downside in the underlying. A screener optimized purely for yield can steer you toward volatile, risky stocks if you are not careful.

Practical risk controls to use alongside any screener: - Cap delta at 0.35 or lower if you do not want frequent assignment. - Avoid earnings weeks unless you specifically want the IV pop and understand the binary risk. - Check the bid-ask spread. If it is wider than 10% of the midpoint premium, the contract is illiquid and you will likely fill poorly. - Do not sell calls on stocks you would not be comfortable holding through a 20% drawdown. The screener does not know your cost basis or your tax situation.

On taxes: the IRS treats most covered call premiums as short-term capital gains when the call expires or is bought back. If your call is deep in the money, it can affect the holding period of your stock under IRS Section 1092 qualified covered call rules. Canadian investors should note that the CRA has its own treatment of option premiums, which can differ from IRS rules. Consult a tax professional before building a high-frequency covered call strategy.

Who Should Pay for a Screener and Who Should Not

Pay for a dedicated screener if: - You actively manage five or more covered call positions. - You spend more than two hours a week manually scanning option chains. - You have been leaving premium on the table because you only check the strikes you already know. - You want preset filters that align with income-focused criteria rather than building your own from scratch.

Stick with free tools if: - You hold one or two long-term positions and sell calls once a month on the same strikes. - You are still learning how delta, IV, and DTE interact. Free tools plus the OIC's free OptionsEducation.org resources will teach you more than a paid screener at this stage. - Your account is small enough that the subscription fee represents more than 5% of your monthly premium income.

The honest answer on ThetaGo specifically: it is a competent, purpose-built tool. It is not dramatically better than a well-configured Barchart scan for most traders. Its main advantage is speed and a cleaner interface. If that is worth $20–$40 a month to you, it is a fair value. If you are willing to spend 30 minutes setting up a free screener properly, you can get 80% of the same output at no cost.

How to Test Any Screener Before You Commit

Most paid screeners offer a free trial of 7 to 14 days. Use that trial with a specific, repeatable test:

1. Pick three stocks you already own or follow closely — for example, MSFT, NVDA, and SPY. 2. Set a filter for 21–30 DTE, delta between 0.20 and 0.35, and annualized return above 12%. 3. Record every contract the screener surfaces each morning for five trading days. 4. Compare those results to what you would have found manually in your broker's chain. 5. Calculate the premium difference per contract.

If the screener consistently surfaces contracts with $30–$80 more premium per contract than your manual process, and you trade at least twice a month, the math likely favors paying. If the results are nearly identical to what you find yourself, save the subscription fee.

The goal of any screener is to make you a more systematic, less emotional trader. The SEC has noted in investor education materials that systematic, rules-based approaches tend to reduce costly behavioral errors in retail investing. A screener enforces discipline by making you define your criteria before you look at the results — not after.

Is ThetaGo free or does it require a paid subscription?

ThetaGo operates on a paid subscription model, with pricing that has typically ranged from roughly $20 to $40 per month depending on the plan. A free trial period is usually available so you can test the filters before committing. Always check the current pricing on their site directly, as subscription tiers change.

Can I use a free screener instead of paying for ThetaGo?

Yes. Barchart's covered call screener and Market Chameleon both offer free tiers that surface annualized return, strike, and expiration data. Thinkorswim's thinkScript can also be configured to replicate most paid screener functions at no extra cost. The trade-off is setup time and less polished filtering for income-specific criteria.

What filters matter most when screening for covered calls?

The four most important filters are annualized return on the position, delta of the short call, days to expiration, and bid-ask spread width. The Options Industry Council (OIC) highlights liquidity — reflected in tight spreads — as a key factor in options execution quality. Implied volatility rank (IVR) is a useful fifth filter to avoid selling calls when IV is unusually low.

Does selling covered calls found by a screener affect my taxes?

In the US, most covered call premiums are taxed as short-term capital gains when the call expires worthless or is bought back, per IRS rules. Deep in-the-money calls can affect your stock's holding period under IRS Section 1092 qualified covered call rules. Canadian investors face different treatment under CRA guidelines. Consult a qualified tax professional before scaling up a covered call strategy.

What is a good annualized return target when screening covered calls?

Many income-focused traders target 10–20% annualized return on covered calls as a reasonable range that balances premium income with manageable assignment risk. Returns above 25% annualized usually signal elevated implied volatility, meaning the market expects significant price movement in the stock. Higher yield almost always comes with higher risk of the stock moving against you.

How do I avoid getting assigned when selling covered calls?

Selling calls with a delta of 0.20 to 0.30 means the market prices roughly a 20–30% probability of the stock closing above your strike at expiration. Staying out of the money by at least 3–5% on stable stocks and avoiding earnings announcement weeks both reduce assignment frequency. If a call moves deep in the money before expiration, buying it back and rolling to a higher strike or later date is a common management technique.