Forex Compounding Calculator — Compound Interest Growth
Project your forex account growth through the power of compounding. Enter your starting balance, monthly return percentage, and time period to see a month-by-month breakdown of your account value.
Monthly Gain: 3%
Duration: 24 months (2y 0m)
Model realistic drawdowns (e.g., lose 3% every 4th month)
Final Balance
$20,327.94
Total Profit
+$10,327.94
Total Return
+103.28%
Annualized
+42.58%/yr
| Month | Profit | Balance | Total Gain |
|---|---|---|---|
| 1 | +$300.00 | $10,300.00 | +$300.00 |
| 2 | +$309.00 | $10,609.00 | +$609.00 |
| 3 | +$318.27 | $10,927.27 | +$927.27 |
| 4 | +$327.82 | $11,255.09 | +$1,255.09 |
| 5 | +$337.65 | $11,592.74 | +$1,592.74 |
| 6 | +$347.78 | $11,940.52 | +$1,940.52 |
| 7 | +$358.22 | $12,298.74 | +$2,298.74 |
| 8 | +$368.96 | $12,667.70 | +$2,667.70 |
| 9 | +$380.03 | $13,047.73 | +$3,047.73 |
| 10 | +$391.43 | $13,439.16 | +$3,439.16 |
| 11 | +$403.17 | $13,842.34 | +$3,842.34 |
| 12 | +$415.27 | $14,257.61 | +$4,257.61 |
| 15 | +$453.78 | $15,579.67 | +$5,579.67 |
| 18 | +$495.85 | $17,024.33 | +$7,024.33 |
| 21 | +$541.83 | $18,602.95 | +$8,602.95 |
| 24 | +$592.08 | $20,327.94 | +$10,327.94 |
* Rows filtered for readability (every month up to 12, then every 3rd)
Last reviewed · How we check our calculators
How to Use the Forex Compounding Calculator
Enter your starting balance, then use the sliders to set your monthly gain percentage and the number of months you want to project. Optionally, enter a monthly withdrawal if you plan to take profits out of the account each month. If the withdrawals take out more than the account earns, the calculator tells you the month the balance reaches $0.
The calculator shows your final balance, total profit, and total percentage return. Scroll through the month-by-month table to see exactly how compounding accelerates your growth over time — the gains in month 24 are substantially larger than in month 1, even at the same return percentage.
Be realistic with your monthly gain target. Consistently achieving 3–5% per month over years is elite-level performance. Most professional traders target 2–3% per month. Use conservative estimates to set realistic expectations.
The Formula
The compounding formula applied month by month:
- Monthly Profit = Current Balance × (Monthly Return % ÷ 100)
- End-of-Month Balance = Previous Balance + Monthly Profit − Monthly Withdrawal
Without withdrawals, this is equivalent to the standard compound interest formula:
- Final Balance = Starting Balance × (1 + Monthly Rate)^Months
Example: $10,000 starting balance, 3% monthly gain, 24 months:
- Final Balance = $10,000 × (1.03)^24 = $20,328
- Total Profit = $10,328 (103.3% return in 2 years)
Monthly vs. annual rate. A monthly return does not convert to an annual one by multiplying by 12. Compounded, 3% a month is (1.03)^12 − 1 = 42.6% a year (a $10,000 account ends the year at $14,258), not 36%. Going the other way, a 20% annual target is only about 1.53% a month. Always compare like with like when you read a broker's or a signal seller's performance claims.
How long to double? The rule of 72 gives a quick estimate: 72 ÷ monthly return % ≈ months to double. At 3% a month that is about 24 months, which matches the exact figure above.
Practical Examples
Example 1 — Conservative Compounding (2% / month)
- Starting: $5,000 | Monthly gain: 2% | Duration: 36 months
- Final balance: $10,199 (+104.0%)
- Your account more than doubles in 3 years at just 2% per month.
Example 2 — Aggressive Compounding (5% / month)
- Starting: $5,000 | Monthly gain: 5% | Duration: 24 months
- Final balance: $16,125 (+222.5%)
- Note: 5% monthly consistently is extremely difficult to sustain in live trading — this illustrates the math, not a realistic expectation.
Example 3 — Compounding with Monthly Withdrawal
- Starting: $20,000 | Monthly gain: 3% | Monthly withdrawal: $300 | Duration: 24 months
- Final balance: ~$30,330 plus $7,200 total withdrawals
- Taking profits monthly significantly reduces the compounding effect but provides cash flow.
Example 4 — The Same 3% Target With Losing Months
- Starting: $10,000 | Monthly gain: 3% | Every 4th month loses 6% | Duration: 24 months
- Final balance: $11,745 (+17.4%) — against $20,328 with no losing months
- Six losing months out of 24 cut the two-year profit by more than four-fifths. Use the drawdown inputs in the calculator to stress-test any projection before you rely on it.
Common Mistakes When Projecting Compound Growth
- Assuming every month is a winning month. Real equity curves have losing streaks; Example 4 shows how much they cost.
- Keeping a fixed lot size. Compounding only happens if your position size grows with the account — for example, risking a fixed 1% of the current balance per trade, which the position size calculator works out for you.
- Ignoring costs and taxes. Spreads, commissions, swaps and tax on gains all reduce the rate that actually compounds.
Frequently Asked Questions
Most consistent retail forex traders generate 2–5% per month in good conditions. Elite hedge funds target 15–20% annually (about 1.2–1.5% per month). Anything above 10% per month consistently over years is extremely rare and usually involves very high risk. Use 2–3% as a realistic benchmark for planning.
Compounding is extremely powerful over time. At 3% monthly, a $10,000 account becomes $20,328 in 2 years, $28,983 in 3 years, and $58,916 in 5 years — without adding any additional capital. The effect accelerates over time because you earn returns on your returns, not just your original capital.
No. Compounding in trading comes from position sizing, not from the account itself. If you trade the same 1-lot position whether your balance is $10,000 or $20,000, your profits grow linearly. To compound, size every trade as a percentage of the current balance, so positions grow after winning months and shrink after losing ones — which also slows the damage during drawdowns.
This depends on your goals. Full compounding maximizes long-term account growth but requires patience. Partial compounding (reinvesting some profits while withdrawing others) balances growth with income. For most traders building capital, full compounding in the early years followed by partial withdrawal later is the optimal strategy.
Drawdowns interrupt compounding and require larger gains to recover. A 10% drawdown requires an 11.1% gain to recover. A 25% drawdown requires a 33.3% gain. A 50% drawdown requires a 100% gain. This is why risk management and position sizing are critical — preserving capital protects your compounding trajectory.
Monthly withdrawals reduce the balance that compounds each month, significantly slowing account growth. In our calculator, a $10,000 account compounding at 3% for 24 months without withdrawals grows to $20,328. With a $150 monthly withdrawal, it grows to only about $15,164. The trade-off is access to income from your trading. Many traders withdraw only profits above a certain threshold.
Embed This Calculator on Your Website
Free for blogs, forums and tipster sites. Paste this HTML where the calculator should appear — it resizes automatically.
<div class="calcvault-embed" style="max-width:700px;margin:0 auto;">
<script src="https://www.calcvault.co/widget.js" data-calc="forex-compounding-calculator" data-backlink="inline"></script>
<p style="text-align:center;margin:6px 0 0;font-size:12px;font-family:system-ui,sans-serif;"><a href="https://www.calcvault.co/calculators/forex-compounding-calculator">Forex Compounding Calculator by CalcVault</a></p>
</div>