How to Calculate a Trading Break-Even Price After Fees

Find the exit price that covers your modeled trading fees

The break-even price depends on the direction, the position size and the charges at both ends of the trade. Start from the signed cash flows to keep fee bases clear.

Identify the opening and closing amounts

Break-even is the hypothetical exit price where signed opening and closing cash flows sum to zero. Opening and closing percentage charges each use their own gross notional. Fixed charges are amounts for each transaction.

A long pays to open and receives cash at exit. A short receives cash to open and pays to buy the shares back.

Compare different fee structures

Fixed charges are spread across the supplied share count. Percentage charges scale with transaction value. Two positions with the same entry can have different break-even prices.

Solve the cash-flow identity

Long price = (opening outlay + closing fixed fee) ÷ [shares × (1 − closing rate)]. Short price = (net opening proceeds − closing fixed fee) ÷ [shares × (1 + closing rate)]. Use rates as fractions in these formulas. With a supplied increment, round the long exit up or the short buyback down on a grid anchored at zero.

Long price = (opening outlay + closing fixed fee) ÷ [shares × (1 − closing rate)]

Verify the long and short cash flows

For 20 shares at 50, with opening rate 1%, closing rate 2% and fixed charges of 2 each, long opening outlay is 1,012 and the mathematical exit is 1,014 ÷ 19.6. On a 0.01 grid, 51.74 yields 0.104 profit. The short mathematical exit is 986 ÷ 20.4, and 48.33 yields 0.068 profit.

The long pays 1,012 to open. At 51.74 it receives 1,034.80 gross and pays 22.696 in closing charges, leaving 1,012.104. At 51.73 it loses 0.092. The short receives 988 at entry. At 48.33 the buyback plus charges costs 987.932. At 48.34 it loses 0.136.

1. Enter 20 shares and an entry price of 50.
2. Enter 2 as each fixed fee, 1% as opening rate, 2% as closing rate, and 0.01 as the increment.
3. Compare the mathematical price, aligned price and adjacent result for long and short.

Enter each charge once

Choose long or short and enter entry price, quantity, and fixed and percentage fees for opening and closing. Supply explicit zero charges where applicable. Optionally enter a positive price increment in the same currency.

Check the nearest grid levels

The signed closing flow at the mathematical exit offsets the opening flow. At a supported grid price, check the exact net profit and the result at the next less favorable price. If the grid has no supported break-even level, the mathematical price remains available.

A rounded mathematical price is for display. The model tests the neighboring grid levels against the unrounded cash-flow identity.

Keep quantities and fee bases consistent

One full exit for the same share quantity, in one major currency. Fees are fixed or proportional to that side’s gross notional. The calculation uses no time period, compounding or annualization.

Understand unsupported prices and fee structures

Entry price and shares are positive and at most 1 trillion. Fixed charges are nonnegative and at most 1 trillion. Rates are from 0% to strictly below 100%. Inputs allow 12 decimal places. The exit must be positive and at most 1 trillion. Mathematical quotients use up to 24 significant digits and are labeled when rounded. Grid decisions use exact fractions.

Schedules with minimum charges, tiers or different rules at different prices need their own model.

Avoid moving the exit in the wrong direction

Apply the closing percentage to the closing notional. For a short, opening is a sale and closing is a purchase. Adding all fees to the entry price gives the wrong direction and can use the wrong closing fee base.

Keep local prices and fees in one currency

Use USD, GBP, CAD, AUD or INR for the USA, UK, Canada, Australia or India. Convert UK pence quotes when using pound-denominated charges. Australian price steps can vary by price band. US execution guidance and Canadian and Indian investor materials provide context on fills and charges. The calculator applies no local default.

Choose a calculator for the trade question

Target Price solves a positive net objective under fixed fees. Stock Profit and Loss evaluates supplied trade prices. Trading Break-Even solves the zero-profit exit with separate fixed and percentage charges.

Educational scope

Educational cash-flow model for hypothetical fills. It excludes tax, FX, borrowing, venue rules, order eligibility, tiered charges, spreads and slippage. Actual costs and fills can differ.

Frequently asked questions

Sources and review

Sources reviewed Nov 11, 2026. Consult current local rules before relying on time-sensitive information.

• Investor.gov execution guidance
• London Stock Exchange GBX quote example
• CIRO fees and costs
• ASX equities price steps
• SEBI investor charter