Free Crypto Tax Calculator
Open source. Self-hostable. Auditable. Calculate crypto capital gains for 30+ countries — FIFO, LIFO, HIFO, weighted average. Generate IRS Form 8949, German §23 EStG, Brazilian DARF, French Form 2086.
Why dTax
100% Open Source (AGPL-3.0)
Every line of code is on GitHub. Audit our cost-basis math, fork it, host it yourself. No black box.
30+ Countries Supported
United States, Germany, France, Brazil, India, UK, Australia, Japan, Canada, Korea, Singapore, Spain, and more — each with country-specific cost-basis rules.
Audit Trail Built In
Every gain calculation links back to source transactions. Export full audit trail for IRS, HMRC, RFB, BaFin, or any tax authority.
Self-Host or Use Hosted
Free tier on getdtax.com — or run the open-source engine on your own server. Your data, your servers.
Unlimited Transactions on Free Tier
No artificial transaction caps. Import 10 trades or 100,000 — same calculation engine, same accuracy.
Tax-Form Ready Exports
IRS Form 8949 + Schedule D, German Anlage SO, French Form 2086, Brazilian DARF/DAA, UK SA108. CSV, PDF, TurboTax TXF (exports require PRO).
How It Works
Import
Connect 29 exchanges (Coinbase, Binance, Kraken) and 22 blockchains. CSV upload also supported. No API keys required for read-only.
Calculate
Pick FIFO or Specific ID for free, or LIFO, HIFO and country-mandated methods (e.g. PMPA for France, weighted average for Brazil) on PRO. The engine handles staking, airdrops, DeFi swaps, NFTs.
Export
Generate your country-specific tax form. Hand to your accountant or upload to TurboTax/H&R Block.
All Major Cost-Basis Methods
Different countries mandate different cost-basis methods. dTax supports all major approaches and applies the correct one based on your jurisdiction:
Country-Specific Tax Logic
Each country has unique crypto tax rules. dTax encodes them: holding periods, exemptions, special rates, mandatory cost-basis methods. Click any country for the full guide.
Frequently Asked Questions
Is the dTax crypto tax calculator really free?
Yes — the free tier supports unlimited transactions, all 29 exchanges, and FIFO / Specific ID calculation with a gain/loss summary; country-specific methods, full Form 8949 line-item detail and PDF, TXF and CSV exports require PRO. No credit card required. The tax engine is open source under AGPL-3.0, so anyone can fork and self-host it.
Which cost-basis methods does the calculator support?
FIFO (first in, first out — IRS default), LIFO, HIFO (highest in, first out — minimizes short-term gains), Specific Identification, ACB (adjusted cost base — Canada), PMPA (mandatory in France), and weighted average (mandatory in Brazil and Germany). The engine auto-applies the correct method for your jurisdiction.
How does it handle DeFi, staking, NFTs, and airdrops?
DeFi swaps are treated as taxable disposal events at fair-market value. Staking rewards are ordinary income at fair-market value when received, and the cost basis carries forward. NFTs use the same capital-gains framework. Airdrops are ordinary income at receipt. Country-specific overrides apply (e.g., Germany's 1-year holding rule).
Can I self-host it?
The open-source engine and CLI are at github.com/dTaxLab/dtax (AGPL-3.0) and run on any VPS or your local machine; your transaction history stays on your server. The full web application and API are proprietary; self-hosting them is arranged per installation. The hosted version on getdtax.com also has a free tier.
How accurate is the calculator?
The cost-basis engine has 984+ automated tests covering all supported jurisdictions and edge cases (chain reorgs, hard forks, wash sales, like-kind exchanges). For audits, every gain links back to source transactions with full audit trail. We are open about known limitations — see our docs.
What's the difference vs Koinly, CoinTracker, CoinLedger?
dTax is open source (they're proprietary), free for unlimited transactions on the hosted tier (they cap at ~50-1000 transactions on free), and the engine is self-hostable (they're SaaS-only). We focus on transparency: you can audit our cost-basis math by reading the code on GitHub.
Ready to calculate your crypto taxes?
Free. Open source. No credit card. Works for 30+ countries. Get your tax forms in minutes.
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