Level 9 · Lesson 13 of 14
Building a Prop Business
From trader to business owner — P&L tracking, tax planning, infrastructure, and income forecasting.
00 — Why This Matters
The Difference Between a Trader and a Trading Business
Two traders, both earning £2,000/month in payouts. Trader A: does not track expenses, buys challenges impulsively, has no emergency fund, gets a £4,800 tax bill in January with no money set aside. Net income: unknown, probably negative some months. Trader B: monthly P&L, business bank account, emergency fund, 30% tax reserve. Knows net income is £1,340/month. Scales to 3 accounts by Month 6. After 12 months: Trader A earned £24,000 gross but actually netted ~£12,000 after costs and tax surprise. Trader B earned £22,000 gross but netted ~£16,000 with zero financial stress.
⚡ REAL SCENARIO
Trader B earned less gross but more net. The difference is not trading skill. It is business operations. This lesson turns you from Trader A into Trader B.
01 — The Prop P&L Statement
Your Monthly Financial Picture
02 — Income Stability
Sporadic vs Business
03 — Understanding the P&L
Every Line Item Explained
04 — Professional Infrastructure
What You Need to Operate
Separate from personal/gaming PC. Clean environment, no distractions. Does not need to be expensive — trading is not GPU-intensive. A £500–800 PC with dual monitors is sufficient.
Separate from personal finances. All payouts go here, all challenge fees come from here, all expenses paid from here. Makes accounting, tax filing, and financial tracking dramatically easier. Free business accounts available from Starling, Tide, Monzo Business.
FreeAgent, Xero, or QuickBooks. Automates invoice tracking, expense categorisation, and tax calculations. Connects to your business bank account for automatic transaction import. Annual cost pays for itself in time saved and tax accuracy.
3 months of challenge fees in reserve. If all funded accounts are lost simultaneously, you can re-purchase 3 challenges without touching personal savings or going into debt. This is the safety net that prevents a bad month from ending the business.
Multiple chart layouts, more indicators, faster data. The £12–25/month subscription pays for itself if it saves even one bad entry from a missed confluence. Annual billing saves ~20%.
Virtual Private Server for running trade copiers across multiple accounts or EAs. Only needed if you automate. Not required for manual discretionary trading.
05 — Prop Income Forecaster
🎯 GROUNDBREAKING: 12-Month Business Projection
Input your business parameters and see projected monthly and annual income across 3 scenarios.
Pessimistic (50%)
£2,022
/month
Realistic
£4,043
/month
Optimistic (150%)
£6,065
/month
Annual Net (Realistic)
£48,518
Breakeven Accounts
0.2
Monthly Breakdown
06 — Monthly P&L Tracking
The Spreadsheet That Runs Your Business
COLUMNS = Month, Revenue (payouts), COGS (all challenge fees), Operating Expenses, Gross Profit, Tax Reserve (30%), Net Income. One row per month. Running total at the bottom.
WHEN TO UPDATE = Last day of every month. Takes 10 minutes. Export bank statement, categorise transactions, calculate totals. If you are using accounting software, most of this is automated.
RED FLAGS = 3 consecutive negative gross profit months. COGS exceeding 40% of revenue (too many failed challenges). Net income below expenses for 2+ months. Any of these triggers a business model review.
THE RULE = If you cannot state your net income within £50 at any moment, you are not running a business. You are hoping.
07 — The Business Maturation Curve
From Startup to Stable Business
MONTHS 1–3: STARTUP = 1 account. Prove the process. First payout. Establish systems: bank account, P&L tracker, tax reserve. Net income may be low or negative (challenge fees + setup costs). This is expected. Focus: validation, not profit.
MONTHS 4–6: GROWTH = 2 accounts. Second firm added. Income exceeds expenses. Emergency fund building. First quarterly P&L review. Focus: consistency and cash flow.
MONTHS 7–9: OPTIMISATION = 2–3 accounts. Drop weakest firm. Scale best performer. Emergency fund fully funded. Income predictable within £200/month. Focus: efficiency and scaling.
MONTHS 10–12: MATURITY = 3+ accounts. Systems running. Tax reserve on autopilot. Annual P&L review. Plan next year: maintain, scale, or pivot. The business runs itself with 2–3 hours/day of trading.
08 — Common Mistakes
4 Business-Level Errors
09 — Cheat Sheet
Business Quick Reference
MONTHLY P&L = Revenue − COGS − Expenses − Tax = Net Income. Track every month. Know your number.
BUSINESS BANK = Separate from personal. All trading money flows through one account. Simplifies everything.
EMERGENCY FUND = 3× challenge fees. The safety net that keeps the business alive when accounts are lost.
30% TAX RESERVE = Every payout, 30% to a separate savings account. Non-negotiable. No surprises in January.
THE RULE = A business that cannot state its net income within £50 is not a business. Track, measure, optimise.
10 — Test Your Understanding
Prop Business Game
5 scenario-based rounds. Calculate P&L, manage emergencies, and make business decisions.
Monthly P&L calculation: In March, you received £3,200 in payouts from 2 funded accounts. You paid £400 for a failed challenge attempt. Your monthly expenses were: TradingView £25, VPS £15, internet (50% business) £20. What is your net income after 30% tax reserve?
11 — Knowledge Check
Final Quiz — 8 Questions
Question 1 of 8
What is the correct order of a prop trading P&L statement?
Question 2 of 8
Why should failed challenge fees be tracked as COGS?
Question 3 of 8
What is the recommended emergency fund size for a prop trading business?
Question 4 of 8
What is the difference between a "sporadic trader" and a "business trader"?
Question 5 of 8
Why is a separate business bank account important for prop trading?
Question 6 of 8
What should startup capital prioritise for a prop trading business?
Question 7 of 8
If your monthly prop income averages £2,200 gross profit and your monthly expenses total £560, what is your approximate annual net income after 30% tax reserve?
Question 8 of 8
What triggers a business model review for a prop trading operation?