Execution Slippage and Implementation Cost Calculator

How to calculate

For buys, an execution above reference is adverse; for sells, below reference is adverse. Sum signed price differences and explicit fees.

Adverse price cost=quantity×(executed−reference) for buys, quantity×(reference−executed) for sells

Worked example

Buying 100 at 10.02 against reference 10 costs 2 in price slippage; with fee 1, total implementation cost is 3. Favorable execution produces a negative price cost.

Assumptions and input details

The reference must be the price benchmark you intend to compare; no market feed is supplied. 1–100 fills in one currency, positive quantity and reference price, nonnegative execution price/fees. Basis points use total absolute reference notional. Unfilled orders, timing opportunity cost, financing and taxes are excluded. No live market data or national tax rules are inferred. Enter consistent amounts in one currency unless explicitly stated otherwise.