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Compound Interest Calculator

Project your trading account growth with compound returns. See how consistent monthly gains, contributions, and withdrawals shape your capital over time.

Parameters

$
%
Average expected return per month
$
Additional capital added each month
$
Capital withdrawn each month

Growth Summary

Final Balance$89,792.82
Total Gain$39,792.82
Total Gain %79.6%
Total Contributions$0
Total Withdrawals$0

Balance Growth

Month 1Month 12

Month-by-Month Breakdown

#StartGain+In-OutEnd
1$50,000$2,500——$52,500
2$52,500$2,625——$55,125
3$55,125$2,756——$57,881
4$57,881$2,894——$60,775
5$60,775$3,039——$63,814
6$63,814$3,191——$67,005
7$67,005$3,350——$70,355
8$70,355$3,518——$73,873
9$73,873$3,694——$77,566
10$77,566$3,878——$81,445
11$81,445$4,072——$85,517
12$85,517$4,276——$89,793

FAQ

Frequently Asked Questions

In trading, compounding means reinvesting your profits so that each month's returns are calculated on a larger balance. If you earn 5% per month on $50,000, month one yields $2,500. In month two, you earn 5% on $52,500, yielding $2,625. Over time, this snowball effect dramatically accelerates growth.

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The R | Protocol API™ software is Copyright © 2026 by Rithmic, LLC. All rights reserved.

Trading Platform by Rithmic™ is a trademark of Rithmic, LLC. All rights reserved.

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Performance Disclosure

Any backtested, simulated, or hypothetical results shown in Lune have significant limitations. They do not represent actual trading and may understate or overstate the impact of market conditions, liquidity, slippage, latency, operational failures, and other real-world factors.

No representation is made that any account will achieve profits or losses similar to any past, projected, or hypothetical results displayed. Past performance is not indicative of future results.

Quotes, market data, and account data may be delayed, incomplete, or inaccurate. You are responsible for independently verifying critical information (orders, fills, positions, balances, P&L, and margin) directly with your broker or prop firm before acting on it.

Risk Disclosure

Lune provides software tools for self-directed trading workflows. We are not a broker-dealer, exchange, investment adviser, or commodity trading advisor, and we do not execute discretionary trades on your behalf.

Trading involves substantial risk and can result in the loss of all capital. Backtested, simulated, or hypothetical results have material limitations and are not guarantees of future performance.

You are solely responsible for strategy selection, account permissions, risk limits, and monitoring live activity. Delays, outages, market volatility, third-party provider issues, and data inaccuracies can materially impact outcomes.

Nothing on this site is tax, legal, or investment advice, and references to instruments, strategies, or providers are not endorsements.