Use the calculator above to project how your trading account grows when you reinvest a percentage of profits each period.
How to Use This Calculator
- Enter your starting balance — the current amount in your trading account
- Enter your expected monthly return — the percentage gain you aim for each month
- Enter the number of months — how long you plan to compound
- Calculate — see the projected account balance at the end of the period
The Compounding Formula
A = P(1 + r/n)^(nt)
Where:
- A = final balance after compounding
- P = starting balance (principal)
- r = annual return rate (as a decimal)
- n = number of compounding periods per year
- t = number of years
Worked Example
Starting balance: $1,000, monthly return: 1%, duration: 12 months.
A = 1,000 × (1 + 0.01)^12 = $1,126.83
After 12 months, your account grows by $126.83. Each month's gain is slightly larger than the previous because you are earning returns on returns.
Month-by-Month Breakdown
To see how compounding works in practice with a $1,000 starting balance and 3% monthly return:
| Month | Starting Balance | 3% Gain | Ending Balance |
|---|---|---|---|
| 1 | $1,000.00 | $30.00 | $1,030.00 |
| 2 | $1,030.00 | $30.90 | $1,060.90 |
| 3 | $1,060.90 | $31.83 | $1,092.73 |
| 6 | $1,159.27 | $34.78 | $1,194.05 |
| 12 | $1,344.89 | $40.35 | $1,385.24 |
| 24 | $1,808.73 | $54.26 | $1,862.99 |
At 3% monthly, your account nearly doubles in two years — not from a single large gain, but from the cumulative effect of reinvesting each month's profit.
Realistic Return Expectations
Compounding calculators can produce impressive numbers, but the projections are only as reliable as your return assumptions.
| Monthly Return | Annualised Return | Realistic? |
|---|---|---|
| 1% | 12.7% | Achievable for experienced traders |
| 3% | 42.6% | Ambitious, requires consistent edge |
| 5% | 79.6% | Extremely difficult to sustain |
| 10% | 213.8% | Unrealistic for most traders |
Professional fund managers typically target 10-20% annual returns. If a broker or signal service promises 5%+ monthly returns consistently, treat it with scepticism. We cover common trading fraud patterns in our scam alerts section.
Compounding vs Withdrawing Profits
The calculator assumes you reinvest all gains. In practice, most traders withdraw some profits. To model this, reduce your monthly return percentage to the net amount after withdrawals.
For example, if you earn 3% but withdraw 1%, enter 2% as your monthly return to see realistic long-term growth.
Related Tools
- Forex Profit Calculator — calculate profit or loss on individual trades
- Forex Margin Calculator — ensure you have enough margin for your position size
- Forex Leverage Calculator — understand leverage requirements as your account grows
- Forex Swap Calculator — factor in overnight holding costs for longer-term strategies
Frequently Asked Questions
What is a realistic monthly return in forex?
Most consistently profitable retail traders achieve 1-3% monthly returns over the long term. Returns above 5% per month are extremely difficult to sustain and often involve high risk. Be wary of services advertising guaranteed high monthly returns — this is a common pattern in forex scams.
Does compounding work with small accounts?
Yes, but the dollar gains are small in the early months. A $500 account compounding at 2% per month adds just $10 in the first month. The mathematical principle works regardless of account size, but small accounts need more time for compounding to produce meaningful results.
Should I compound with a funded (prop) account?
Most proprietary trading firms require regular profit withdrawals and do not allow true compounding within the funded account. You could compound by reinvesting payouts into a personal trading account. Check your specific firm's rules on profit splits and withdrawal schedules.
How does drawdown affect compounding?
Drawdowns break the compounding chain. A 20% loss requires a 25% gain just to return to the previous balance. This asymmetry means that protecting capital (avoiding large drawdowns) matters more for long-term compounding than chasing high returns. Use our Forex Margin Calculator to size positions conservatively.