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# Which Prop Firm Account Size Should You Get? Start With Your Stop
- URL: https://www.daytraderincome.com/prop-firm-account-size/
- Published: 2026-10-28T05:33:21.000Z
- Updated: 2026-10-31T23:10:29.000Z
- Description: A 150K account isn't "bigger" in the way that matters. The drawdown decides how many contracts you can trade. Here's the math, with a worked example.
- Author: Indy Karveli
- Tags: Getting started

**Short answer:** pick the account whose **drawdown** can survive your worst losing stretch at the size you plan to trade, every trade. The headline number (25K, 50K, 150K) doesn't matter much. The drawdown does.

This assumes you trade the same number of contracts on every trade and you know roughly how big your stop is. If you don't know those two things yet, start on paper: [how to paper trade](https://www.daytraderincome.com/how-to-paper-trade/).

Want the full walkthrough for one account size? Read [How many micros should you trade on a $50K prop firm account?](https://www.daytraderincome.com/how-many-micros-50k-prop-firm-account/)

## Why the drawdown is the real account size

A "150K" evaluation doesn't give you $150,000 to lose. It gives you a [maximum drawdown](https://www.daytraderincome.com/what-is-drawdown/), often somewhere between $1,000 and $5,000\. Lose that much from your high and the account is gone. So the question isn't "how big is the account?" It's "how many points can I lose before it ends, at my size?"

**Room in points = drawdown ÷ (contracts × dollars per point)**

| Drawdown | 1 micro (MNQ, $2/pt) | 3 micros ($6/pt) | 1 mini (NQ, $20/pt) |
| -------- | -------------------- | ---------------- | ------------------- |
| $1,000   | 500 pts              | 166 pts          | 50 pts              |
| $2,000   | 1,000 pts            | 333 pts          | 100 pts             |
| $3,000   | 1,500 pts            | 500 pts          | 150 pts             |
| $4,500   | 2,250 pts            | 750 pts          | 225 pts             |

## Now compare it to your stop

Your account has to survive a **losing streak**, not one loss. A simple rule: room in points should be at least **10 times your normal stop**, more if your stops vary a lot.

- 20-point stops on 3 micros: 10 stops = 200 points. A $2,000 drawdown (333 points) works.
- 100-point stops on 3 micros: 10 stops = 1,000 points. Even $4,500 (750 points) is tight.

## A worked example

Here’s a made-up example to show the math (an illustration, not anyone’s results). Say a single NQ setup with wide stops, often 100 to 150 points, has a month of trades replayed against common account rules, starting from every possible day, and the worst stretch in that month runs 634 points, counted trade by trade. That was 21 trades over four sessions, not one trade; the biggest single loss was 151 points. The result:

- **$1,000 drawdown:** not even 1 micro survived every start.
- **$2,000:** 1 micro.
- **$3,000:** 2 micros.
- **$4,500:** 3 micros, and no more.

That's roughly **1 micro for every $1,500 of drawdown** for that setup. Someone with 15-point stops could trade many times that on the same account. Same account, different strategy, completely different answer. That's why there's no single "best size."

## Rules that change the answer

- **End-of-day vs intraday trailing drawdown.** Intraday trailing follows your open profit, so a winner that comes back can tighten your floor.
- **Daily loss limit.** It caps a bad day, but it can also stop you before the winner that would have saved it.
- **Consistency rules.** If one big day is most of your profit, some accounts won't pay out yet.
- **Copy trading many accounts** doesn't spread risk: they all win and lose together.

## Do the math for your numbers

**Test your own trades:** paste your results into [Test my trades](https://www.daytraderincome.com/test-my-trades/) and it replays them against any drawdown, daily limit and target, from every starting day, and tells you the most contracts that survive. It's the same test behind the example above.

Use the trailing drawdown and position size calculators on [my calculators page](https://www.daytraderincome.com/calculator/). To see each firm's current drawdown, daily limit and rules side by side, check [Prop Firm Duel](https://www.propfirmduel.com/?ref=daytraderincome.com), a site I also run.

*Education only, not advice. Simulated replays use closed trades and leave out commissions; real results can be worse. Most traders fail prop firm evaluations.*