Compounding a small account: a worked example with losses and costs
The Nuqta Markets team · 28 October 2026 · 7 min read · How we write
In short
- Compounding multiplies whatever the edge is, including a negative one after costs.
- On small accounts the 0.01 lot step and the spread take a larger share of each trade.
- The same rules can end above or below the start; a range, not a single curve, is the honest picture.
Compounding charts usually show a smooth curve bending upward. That curve leaves out the three things that decide what a small account actually does: the losing trades, the costs on every trade and the 0.01 lot step. This article puts all three back in. Every figure below is hypothetical maths, not a projection of what any account will do.
How fixed-percentage compounding works
With a fixed risk r per trade, a win of k R multiplies the account by (1 + r × k) and a loss multiplies it by (1 − r). Take ten trades, four wins of 2R and six losses of 1R, at 1% risk on $1,000:
| Calculation | Result | |
|---|---|---|
| Before costs | 1,000 × 1.02⁴ × 0.99⁶ | about $1,019.09 |
| With 0.1R costs per trade | 1,000 × 1.019⁴ × 0.989⁶ | about $1,008.96 |
Illustrative calculation, not an expectation of results.
A cost of 0.1R per trade, roughly a spread of a pip or two on a 15 to 20-pip stop, removed more than half of the gain in this example. The cost side is explained in how to read a bid/ask quote.
Order changes the ride, not the result
Because the factors multiply, the same ten results give the same final balance in any order. The path is different:
| Order of the ten trades | Lowest point | Largest drawdown | Final |
|---|---|---|---|
| Six losses first, then four wins | $941.48 | 5.9% | $1,019.09 |
| Four wins first, then six losses | $1,000.00 | 5.9% | $1,019.09 |
| Mixed (W L L W L W L L W L) | $999.70 | 2.0% | $1,019.09 |
Illustrative calculation, not an expectation of results.
The trader who meets six losses first is the one most likely to change the rules before the wins arrive. That is why the losing streak, not the final number, is the part to plan for; see risk of ruin.
The 0.01 lot step on a small account
On $500, 1% is $5. A 20-pip stop on EURUSD needs 0.025 lot, which rounds down to 0.02 (real risk 0.8%). A 30-pip stop needs 0.0167, which rounds down to 0.01 (0.6%). The lot only steps up when the account crosses a threshold, so a small account does not compound smoothly: it moves in stairs, and the real risk per trade is often below the nominal one. The lot size calculator shows the rounded lot and the real percentage for each stop.
A range, not a curve
To show the spread of outcomes, three hypothetical rule sets were simulated 100,000 times over 100 trades from $1,000. Rules A have a 45% win rate and wins of 1.5R; the zero-edge rules have a 50% win rate and wins of 1R.
| Scenario | Bad case (10th pct.) | Middle (median) | Good case (90th pct.) | Runs ending below $1,000 | Typical largest drawdown |
|---|---|---|---|---|---|
| Rules A, 1% risk, no costs | $968 | $1,124 | $1,306 | about 19% | about 9% |
| Rules A, 1% risk, 0.1R costs | $876 | $1,017 | $1,182 | about 47% | about 12% |
| Rules A, 2% risk, 0.1R costs | $756 | $1,019 | $1,375 | about 47% | about 23% |
| Zero edge, 1% risk, 0.1R costs | $798 | $900 | $1,015 | about 87% | about 15% |
Illustrative calculation, not an expectation of results. Hypothetical inputs and simulated sequences; real trading adds gaps, slippage and rules that stop working.
Read the rows honestly. Costs turned a hypothetical edge into close to a coin flip on whether the account ends above its start. Doubling the risk barely moved the middle, but it widened both ends and doubled the typical drawdown. And with no edge, compounding simply compounds the costs. The inputs come from the formula in expectancy and win rate.
In short
Compounding multiplies whatever is there, a small positive expectancy or a negative one after costs. On a small account the 0.01 lot step makes growth come in stairs, the spread takes a larger share of each stop and the realistic picture is a wide range of outcomes, including many below the start. Check the reward side of each setup with the risk-reward calculator before counting on any curve.
Questions people also ask
Does the order of wins and losses change the final balance?
With a fixed percentage risk and the same set of results, the final balance is the same in any order because the growth factors multiply. The order changes the drawdown along the way, which is what decides whether a trader keeps following the rules.
Is it better to risk a fixed dollar amount on a small account?
A fixed amount grows linearly and does not shrink during a drawdown, so losses weigh more as the account falls. A fixed percentage shrinks the risk after losses. This article uses the percentage method as an educational example.
How much can a small account grow per month?
There is no reliable figure, and many accounts shrink. The maths in this article shows how wide the range is even for hypothetical rules with a small positive edge, and that costs can remove most of it.
Take the quiz and find your trader profile.
Take the quizTrading financial markets carries a high level of risk and can result in the loss of all the money you invest. Nuqta Markets content is for education only and is not investment advice. Past results do not guarantee future results.