Premium selling generates four distinct kinds of taxable event, and they are taxed differently. Most confusion comes from assuming that because the cash arrived on day one, the tax consequence did too.

It did not. Here is the framework, and the rest of this track handles the edge cases.

Four events, four treatments

The first two are straightforward: a closed option position produces a capital gain or loss in the year it closed, and for premium selling it is essentially always short-term.

The last two are where it gets interesting, and they are the two that matter most for the wheel.

Assignment defers rather than taxes

When a put you sold is assigned, the premium is not income that year. Instead it reduces the cost basis of the shares you received.

Sell a $100 put for $2.50 and get assigned: your tax basis in the 100 shares is $97.50 per share, not $100. Nothing is taxed at assignment. The gain or loss is realised when you eventually sell those shares — potentially in a completely different tax year.

This is genuinely useful. A December assignment moves that premium's tax consequence into whatever year you sell the shares, which is a deferral you did not have to do anything to obtain. See tax basis after assignment for the mechanics.

Being called away adds to the sale price

The mirror case. When a covered call is assigned and your shares are sold at the strike, the premium you collected is added to the sale proceeds rather than taxed separately.

Shares with a $90 basis, called away at $105, having collected $1.50 in premium: proceeds are treated as $106.50, and the gain is $16.50 per share. Whether that gain is short-term or long-term depends on how long you held the shares, not the option — which is where covered call tax traps becomes relevant.

Nearly everything is short-term

A closed option position's holding period is the time you held the option. Sell a 30-day put and close it after three weeks and you have a three-week holding period — comfortably short-term, taxed at your ordinary income rate rather than the preferential long-term rate.

There is no realistic way around this for premium selling. It is not a flaw in your execution; it is what the strategy is. Budget for it when comparing the strategy's headline returns to a buy-and-hold alternative — see holding periods.

The three complications worth knowing exist

Wash sales. They apply to options, and rolling a losing position can trigger one without you noticing. Covered in its own lesson, because it is the rule most likely to surprise an active seller.

Section 1256 contracts. Broad-based index options get a different and often better treatment: 60% long-term, 40% short-term, regardless of holding period. See Section 1256.

Qualified dividends. Writing certain covered calls can suspend your holding period and cost you the preferential dividend rate. Covered in covered call tax traps.

What this means for your records

The tax treatment is why basis tracking matters beyond performance measurement. Assignment moves premium into basis, and if your records do not reflect that, your reported gain when the shares sell will be wrong.

Your broker generally handles this correctly on the 1099-B for straightforward cases, and less reliably for wash sales across accounts and for assigned positions. Which is why reconciling the 1099-B is worth the hour it takes.

What can go wrong

Treating assignment premium as income in the year collected. It is not taxed then; it adjusts basis.

Expecting long-term rates. Premium selling produces short-term gains essentially by construction.

Assuming the 1099-B is complete. Wash sale adjustments across accounts are specifically your responsibility, not the broker's.

Ignoring tax when comparing strategies. A 20% pre-tax return taxed at ordinary rates is not obviously better than a 16% return taxed at long-term rates.