# What a swap actually costs, and why it is never the number on the screen

> Your swap screen shows a price. It does not show the fees, the slippage, or the routing costs. This post explains what those are, how they add up, and how to control them. You can manage these costs with a plan.

- Source: https://defiloops.com/blog/what-a-swap-actually-costs
- Published: 2026-09-22
- Category: Strategy
- Tags: execution, fees, routing, swaps, slippage
- Author: DeFiLoops

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Your swap screen shows a price. It does not show the fees, the slippage, or the routing costs. This post explains what those are, how they add up, and how to control them. You can manage these costs with a plan.

## Your swap screen shows one price
When you swap tokens, you see a single number. This number is the spot price. It is the price at that exact moment. This price does not include other costs.

## Fees and slippage add to the cost
A swap has fees. It also has slippage. Slippage is the difference between your expected price and the actual price. This happens because the market moves. You can set a maximum slippage tolerance. This protects you from large price changes.

## Routing finds the best path
A swap may use multiple paths. This is called routing. Routing finds the best price across different pools. It can reduce your total cost. The agent uses routing to find the best path for your swap.

## A plan controls your total cost
You can define a plan for your swap. This plan includes your desired price. It also includes your maximum slippage. The agent executes this plan. It ensures your swap meets your conditions. This gives you control over the total cost.

## This system does not guarantee a specific price
The system executes your plan. It cannot guarantee a specific price. Market conditions change quickly. A large order can move the market. Your plan protects you from unwanted outcomes. It does not remove market risk.