Covered Calls and Cash-Secured Puts — Tax Treatment of Popular Option Strategies

Covered calls and cash-secured puts are the bread and butter of income-focused option traders on Robinhood UK and Tastytrade. The strategies are straightforward. The tax treatment — which depends on how the position closes — is where it gets interesting.

Covered calls: three outcomes, three tax treatments

You own 100 shares. You sell a call against them (STO). Three things can happen:

1. The call expires worthless. You keep the premium. This is a standalone option disposal — the premium is a capital gain. Proceeds = premium received. Cost = £0 (you didn’t pay to open the short). Report in SA108 Boxes 14-22.

2. You buy the call back (BTC). The gain or loss is the net of premiums — what you received (STO) minus what you paid to close (BTC). Also reported in the options section.

3. The call gets assigned. Under TCGA 1992 s.144, the option grant and its exercise are treated as a single transaction. The premium you received is added to the stock sale proceeds. The option itself shows £0 gain — the premium is folded into the share disposal. The share sale goes in SA108 Boxes 23-30 with the enhanced proceeds.

The Capital Gains Manual at CG55500 covers the treatment of options generally, and CG55535 specifically addresses the exercise/assignment scenario.

Cash-secured puts: same structure, mirror image

You sell a put (STO), keeping cash aside to buy shares if assigned. Same three outcomes:

Expires worthless: Premium is a capital gain (option disposal).

Bought back (BTC): Net premium is the gain or loss.

Assigned: You’re obligated to buy shares at the strike. The premium you received reduces the stock acquisition cost. No separate option gain — the premium is folded into the stock purchase. The shares enter your Section 104 pool at the strike price minus the premium.

The wheel strategy

Many traders run the “wheel” — sell puts, get assigned, sell covered calls, get called away, repeat. Each leg follows the rules above. The tax treatment chains together:

STO put → assigned → shares acquired at (strike − premium) → STO call against shares → assigned → shares sold at (strike + premium).

The total gain across the cycle includes both premiums and the stock price movement. But each event is reported in the correct SA108 section: option disposals (expiries and closes) in Boxes 14-22, stock disposals (from assignments) in Boxes 23-30.

This sequencing is genuinely tricky to do manually. Getting the assignment linkage wrong — treating the option disposal and stock trade as separate events — double-counts the premium. Our options CGT guide has a detailed breakdown with worked examples, and TaxBull is the only free UK calculator that handles the full assignment/exercise lifecycle automatically.

Matching multiple option positions

If you’ve sold the same call or put multiple times (same ticker, strike, and expiry), closes are matched to opens on a FIFO basis — oldest open first. This is different from shares, which use the Section 104 pool. Options with different strikes or expiries are different assets and are matched independently.

The ICAEW’s tax resources discuss derivative taxation for practitioners, though most of the detailed guidance comes from HMRC’s internal manuals rather than published helpsheets.

Options taxation is a specialist area with limited published HMRC guidance. This is general information. Consult a tax professional familiar with derivatives if your options activity is substantial.