Prop trading business setups traders ask CPAs about

Read this part first

There is no one-size structure, and the wrong structure can cost more than it saves. Everything below is an explanation of a question, not a suggestion that you do it. The right answer depends on your income, your state, your other work, and how business-like your trading is — which is precisely why it's a CPA conversation.

"Trader tax status" (TTS)

Some active traders qualify for what's informally called trader tax status — the IRS's criteria for someone whose trading is frequent, continuous, and substantial enough to be treated as a business rather than investing. The IRS lays out the tests in Topic no. 429, Traders in Securities.

Note the nuance for funded traders specifically: TTS case law developed around traders in securities you own. Prop payouts are already contractor income, so how TTS interacts with a funded arrangement is genuinely a specialist question — not a box you self-check.

The §475 mark-to-market election

Bundled with the TTS discussion is the §475(f) mark-to-market election, also described on Topic no. 429. It changes how gains and losses are characterized and timed and can affect the wash-sale rules. It has strict timing and eligibility requirements, and it's not easily reversed. This is firmly CPA territory — the election is easy to get wrong.

LLC and S-corp elections

The other common thread is entity structure:

• An LLC is a legal/liability structure. On its own it usually doesn't change how the income is taxed for a single owner.
• An [S-corp](https://www.irs.gov/businesses/small-businesses-self-employed/s-corporations) election is the one people chase for the self-employment-tax angle — paying yourself a "reasonable salary" and taking the rest as distributions. It also adds payroll filings, administrative cost, and "reasonable compensation" requirements the IRS enforces.

Whether the savings beat the added cost and complexity depends on the numbers. Below a certain income the overhead can exceed the benefit; above it, the calculus can flip. A CPA runs your numbers — a forum post can't.

What each of these has in common

Every setup on this page trades simplicity for a potential tax or liability benefit, and every one has a downside that only shows up in the details. That's the entire reason we won't recommend one: the right call is specific to you, the stakes are real, and getting it wrong is expensive.

Where to take these questions

Take them to a trader-focused CPA. General preparers often haven't seen a funded-account 1099-NEC or the TTS/§475 interaction; specialists (the kind of practice behind resources like Green Trader Tax) have. TradersGuild's role stops at giving you clean books to bring them — via the Eval Ledger Tax Season Export — so the meeting is about strategy, not data entry.