Crypto Tax Calculator: Calculate Gains and Losses on Cryptocurrency

Complete Guide: Crypto Tax Calculator: Calculate Gains and Losses on Cryptocurrency

Our crypto tax calculator estimates federal, state, and Net Investment Income Tax (NIIT) on a single crypto disposal. It accounts for fees in your cost basis and proceeds, classifies gains as short‑ or long‑term based on your holding period, and adjusts brackets by your filing status and income. Use it to quickly see the tax impact of a trade and your net after‑tax result, then export a JSON snapshot you can share with a tax professional.

How crypto taxes work (2025)

In the U.S., crypto is treated as property. When you dispose of coins (sell for fiat, swap for another token, spend on goods/services), you realize a capital gain or loss equal to your net proceeds minus your cost basis. If you held the asset less than 12 months, the gain is short‑term and taxed at ordinary income rates. If you held it 12 months or longer, the gain is long‑term and taxed at preferential 0%, 15%, or 20% federal rates depending on your income. Many states also tax gains, often at ordinary income rates.

Short‑term vs. long‑term

Short‑term gains (held < 12 months) are taxed using ordinary income brackets for your filing status. Long‑term gains (held ≥ 12 months) use capital gains brackets of 0%, 15%, or 20% (income‑dependent). This calculator selects the correct classification from your holding period input and estimates tax using 2025 bracket thresholds.

NIIT and state taxes

The Net Investment Income Tax adds 3.8% on investment income above certain thresholds ($200k single / $250k married filing jointly, etc.). Many states tax capital gains as ordinary income; some do not tax income (e.g., FL, TX, WY). Select your state to include a simple state estimate. Actual state rules vary; use this as a directional guide.

Staking, mining, and airdrops

Rewards from staking, mining, and airdrops are generally taxed as ordinary income at the fair market value on the day you receive them. Later, when you sell those coins, you may have a capital gain or loss relative to that basis. The calculator lets you add an estimate of this year's additional crypto income to improve bracket and NIIT accuracy.

Real‑world examples

Best practices for accurate reporting

• Track lots and fees: Keep exchange statements and wallet records. Fees change cost basis and proceeds.
• Use specific ID when possible: If you can document lot selection, specific identification can optimize taxes vs. FIFO.
• Record income events: Staking/mining/airdrops are ordinary income on receipt. Save timestamps and values.
• Consider state rules: A few states have unique treatment or surtaxes. Check your state's guidance.
• Mind the timing: Holding 12+ months can materially lower federal tax rates on gains.

Limitations & assumptions

This tool estimates a single‑lot trade and assumes straightforward U.S. tax treatment. It does not support multi‑lot matching (FIFO/LIFO/specific ID), wash sale equivalents, like‑kind exchanges, deferral strategies, or business entity nuances. State calculations are simplified flat‑rate estimates. For full‑year filing, use comprehensive crypto tax software and consult a licensed tax professional.