Exchange · API · CSV
BigONE spot and futures, one tax report.
Connect BigONE with a read-only API key and HashBooks reads your trades, deposits and withdrawals. A file upload works too, through the HashBooks template.
- PnL and funding
- 8 country reports
- Read-only
- From
- BigONE
- To
- HashBooks ledger
- Method
- Read-only API key
- Access
- View only. No trading, no withdrawals
- Brings in
- Spot and other trades the API returns, Closed futures and perpetual positions, with funding
- Report
- Form 8949 SA108 Schedule VDA myTax capital gains Schedule 3 Anlage SO Form CG1 IRAS income summary
- Keys
- AES-256-GCM, deleted on disconnect
Every row keeps its original record
At a glance
BigONE in brief.
| Listed jurisdiction | China |
|---|---|
| Markets | spot and perpetual swaps |
| How HashBooks connects | Read-only API key, or file |
| History it gives HashBooks | trades, deposits and withdrawals |
| Website | big.one |
| API documentation | open.big.one |
| Fee schedule | bigone.zendesk.com |
Jurisdiction, markets and links as listed in the open-source ccxt library (4.5.85), which HashBooks uses to connect to exchanges.
Taxed or not
Which BigONE moves create tax.
Whether each BigONE move creates tax depends on where you file. This follows the country at the top of the page.
| On BigONE | Taxable in United States? | How |
|---|---|---|
| Buying crypto | No | Buying with dollars sets your cost basis. |
| Selling for cash | Yes | Capital gain or loss; short- or long-term by holding period. |
| Swapping one coin for another | Yes | A disposal of the coin you give up, at market value. |
| Rewards, staking and interest | Income | Ordinary income at fair market value when received. |
| Futures and perpetuals | Yes | Gain or loss when a position closes; funding adds to or reduces it. |
| Moving to your own wallet | No | Moving between your own wallets and accounts. |
| On BigONE | Taxable in United Kingdom? | How |
|---|---|---|
| Buying crypto | No | Buying with pounds adds to your Section 104 pool. |
| Selling for cash | Yes | Capital Gains Tax above the £3,000 annual exempt amount. |
| Swapping one coin for another | Yes | A disposal at market value. |
| Rewards, staking and interest | Income | Income at the pound value when received. |
| Futures and perpetuals | Depends | Gains and losses on closed positions; treatment depends on the contract. |
| Moving to your own wallet | No | Moving between your own wallets. |
| On BigONE | Taxable in India? | How |
|---|---|---|
| Buying crypto | No | Buying with rupees sets your cost of acquisition. |
| Selling for cash | Yes | 30% plus 4% cess on the gain; 1% TDS on Indian exchanges. |
| Swapping one coin for another | Yes | A transfer of the coin you give up, taxed at 30% plus cess; TDS applies on both legs. |
| Rewards, staking and interest | Income | At your slab rate when received. |
| Futures and perpetuals | Depends | Reported in rupees; the treatment depends on the contract, so check with a CA. |
| Moving to your own wallet | No | Moving between your own wallets and exchanges. |
Worked example
One example, line by line.
A BigONE position, with the tax shown for the country you picked. The numbers are for illustration only; yours come from your own history.
Illustrative · United States
| Realised profit on the position | $1,200 |
|---|---|
| Funding paid while it was open | −$80 |
| Net result | $1,120 |
| At a 22% ordinary rate if short-term | $246.40 |
Rates depend on how the contract is treated; check yours with a tax professional. The full example in the help centre.
Illustrative · United Kingdom
| Realised profit on the position | £1,000 |
|---|---|
| Funding paid while it was open | −£60 |
| Net result | £940 |
HashBooks reports the figures in pounds; derivatives can be taxed differently from coins, so have an adviser check them. The full example in the help centre.
Illustrative · India
| Realised profit on the position | ₹80,000 |
|---|---|
| Funding paid while it was open | −₹5,000 |
| Net result | ₹75,000 |
Reported in rupees; how it’s taxed depends on the contract, so check with a CA. The full example in the help centre.
Your country
How BigONE activity is taxed where you live.
Pick where you file and the rules below follow. Each one has a longer write-up in the HashBooks help centre.
United States · Form 8949
- Selling, swapping or spending what you hold on BigONE. Selling, swapping or spending crypto is a capital gain or loss: short-term at 10–37% if held a year or less, 0, 15 or 20% if held longer. More on BigONE in United States
- Futures and perpetuals on BigONE. Closing a futures or perpetual position realises a gain or loss, and funding you pay or receive moves your result too. HashBooks records both in dollars on the day. More on BigONE in United States
- Rewards and interest from BigONE. Staking rewards, interest and other rewards are ordinary income at their dollar value when received; that value becomes their cost basis. More on BigONE in United States
- Moving coins to or from BigONE. Moving crypto between your own wallets and accounts isn’t taxable. More on BigONE in United States
- Cost basis. Since 1 January 2025 cost basis is tracked per wallet or exchange; HashBooks uses FIFO, lot by lot. More on BigONE in United States
Full rules: the United States crypto tax guide in the help centre, or the United States overview.
United Kingdom · SA108
- Selling, swapping or spending what you hold on BigONE. Selling, swapping or spending crypto is a disposal for Capital Gains Tax: gains above the £3,000 annual exempt amount are taxed at 18% or 24%. More on BigONE in United Kingdom
- Futures and perpetuals on BigONE. Gains and losses on closed futures and perpetual positions, and funding payments, are reported in pounds. Derivatives can be taxed differently from spot coins, so have an adviser check the treatment. More on BigONE in United Kingdom
- Rewards and interest from BigONE. Staking rewards are income at their pound value when received, and that value becomes their cost for a later disposal. More on BigONE in United Kingdom
- Moving coins to or from BigONE. Moving crypto between your own wallets isn’t a disposal. More on BigONE in United Kingdom
- Cost basis. Disposals match same-day buys, then buys in the next 30 days, then the Section 104 pool. More on BigONE in United Kingdom
Full rules: the United Kingdom crypto tax guide in the help centre, or the United Kingdom overview.
India · Schedule VDA
- Selling, swapping or spending what you hold on BigONE. Each sale or swap is a transfer taxed at a flat 30% plus 4% cess on the gain. Losses can’t be set off, and only the cost of acquisition is deductible. More on BigONE in India
- Futures and perpetuals on BigONE. Gains and losses on crypto futures and perpetuals are reported in rupees; how they are taxed depends on the contract and your facts, so check with a CA. More on BigONE in India
- Rewards and interest from BigONE. Staking, airdrop and other rewards are income at your slab rate when received; selling them later is a separate 30% transfer. More on BigONE in India
- Moving coins to or from BigONE. Moving crypto between your own wallets and exchanges isn’t a transfer. More on BigONE in India
Full rules: the India crypto tax guide in the help centre, or the India overview.
See the rules for your country.
How to connect
BigONE, step by step.
Pick the method that suits you — both land in the same ledger. Stuck? See connecting accounts in the help centre.
- Sign in to BigONE and open its API management page.
- Create a new API key and enable read (view-only) permission only. Leave trading and withdrawals switched off.
- In HashBooks, choose BigONE under Integrations and paste the API key and secret.
- HashBooks syncs your full history and keeps it up to date.
- Download your trade, deposit and withdrawal history from BigONE.
- Copy the rows into the HashBooks CSV / Excel template: date, type, what you sent and received, the fee, and any TDS.
- Upload it in HashBooks, check the preview, then confirm. Uploading the same file twice never double-counts.
What comes across
What HashBooks reads from BigONE.
- Spot and other trades the API returns
- Closed futures and perpetual positions, with funding
- Deposits
- Withdrawals
- Fees
Good to know
BigONE specifics.
- HashBooks prepares your report for the country where you file, not where BigONE is based, so gains on BigONE follow your own country’s rules.
- BigONE offers spot and perpetual swaps. Closed positions and funding payments are imported alongside spot trades, so the report shows your whole result on the platform.
Similar
More futures & perps, same ledger.
Security
A read-only BigONE key, and nothing more.
The BigONE key you create can only view. HashBooks has no way to place an order or move funds, stores the key encrypted with AES-256-GCM, and deletes it when you disconnect. How HashBooks keeps data safe.
Questions
BigONE, answered.
Does BigONE report my trades to the tax office?
Reporting depends on where BigONE is regulated and where you live, so don’t rely on it. Your return has to include every sale and swap across all your platforms, which is what HashBooks brings together.
How are BigONE futures and perpetuals taxed?
Closing a position realises a gain or loss, and funding you pay or receive adds to or reduces your result. HashBooks imports both from BigONE and reports them under your country’s rules; the tax section above shows how your country treats them.
Does HashBooks need trading permission on BigONE?
No. Create the BigONE key with read access only and leave trading and withdrawals off. HashBooks has no code that can trade or withdraw, and the key is encrypted with AES-256-GCM and deleted when you disconnect.
How do I get my BigONE transaction history for taxes?
Connect BigONE with a read-only API key and HashBooks pulls the history for you. You can also export a statement from BigONE and upload it with the HashBooks template.
Which HashBooks plan do I need for BigONE?
Connecting BigONE and seeing an estimated tax summary is free for up to 100 transactions across 3 connections. Filing reports for your country start on the Starter plan; see pricing.
Can HashBooks trade or withdraw on BigONE?
No. The key you create is view-only, and HashBooks contains no code that can trade, withdraw or transfer. It’s encrypted with AES-256-GCM and deleted the moment you remove BigONE.
Something else? Read all questions and answers, ask us or browse the help centre.
Ready?
BigONE today, the rest when you like.
Free to start. Read-only from the first click.