OSRS Grand Exchange Net Income After Tax Calculator

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Trade details
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Enter buy and sell details above to calculate.
Trade log
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Calculate a trade above and hit "Log this trade".
How to use ▲
1
Search for an item
Type any item name in the search box. The tool pulls the full list of Grand Exchange tradable items from the OSRS wiki, so you can search by partial name. Select your item from the dropdown — exempt items will automatically have their tax set to zero.
2
Enter your buy details
Enter the price per item you paid on the Grand Exchange and the quantity you bought. These fields calculate your total cost basis.
3
Enter your sell details
Enter the price per item you are selling at and the quantity you are selling. The tool will calculate the 2% GE tax (floored per item, capped at 5,000,000 gp per item) and deduct it automatically.
4
Review your results
Your NIAT (Net Income After Tax), total tax paid, and ROI are shown instantly. The breakdown panel shows total sale value, total cost, and tax deducted so you can see exactly where your profit comes from.
5
Log and track your trades
Hit "Log this trade" to save it to your trade log below. Each entry is timestamped and the summary panel tracks your total NIAT, best single trade, and average ROI across all logged trades. Use "Export CSV" to download your full log as a spreadsheet.
Tax rules
The Grand Exchange applies a 2% convenience fee to all sales, with the following rules:
Tax is calculated per item and floored to the nearest whole number, then multiplied by quantity.
Tax is capped at 5,000,000 gp per item regardless of sell price.
Items sold below 50 gp have no tax obligation (floor of 49 × 0.02 = 0).
Certain items are fully exempt from tax including bonds, basic tools, low-level food and combat supplies, and common teleport items.