IRS Form 1099-DA broker reporting begins January 2026. Brokers will report your proceeds — not your cost basis. Without accurate records, you pay tax on the full sale amount.
Bitcoin + Ethereum Tax Software
Prove your cost basis.
Stop overpaying.
CostBasis is the only crypto tax software that solves cross-platform transfer reconciliation — the problem every multi-exchange holder faces, but no competitor treats as a priority.
The problem competitors ignore
01
You buy BTC on Coinbase
Coinbase records your purchase: 1 BTC at $30,000. Your cost basis is established.
02
You transfer to Ledger
You move it to self-custody. Coinbase shows a withdrawal. Your Ledger shows a deposit. These are the same coin.
03
Brokers report proceeds, not cost
When you sell, Coinbase reports $50,000 proceeds to the IRS — with no cost basis. You owe tax on $50K, not $20K gain.
How CostBasis is different
BTC + ETH only
No altcoin complexity. Faster, more accurate results for the assets you actually hold.
Transfer reconciliation first
We match your outbound sends to inbound receives across all your wallets and exchanges — preserving your original cost basis.
Fixed annual pricing
$149/year. No per-transaction fees that punish you for trading activity.
IRS-ready output
Form 8949 and Schedule D generated from your verified, reconciled transaction history.