“How is forex trading taxed?” has no single answer, because tax authorities classify by instrument and by how the activity is carried on, not by market. The same EUR/USD position sits in different places in the UK tax code depending on whether it was opened as a spread bet or a contract for differences, and Australia starts from a different question again.
This guide is educational and is not tax advice. It summarises what HMRC and the ATO publish and links the exact pages. It cannot tell you what your own position is, and guidance is amended without notice — confirm anything here on the live page at gov.uk or ato.gov.au, or with a qualified tax adviser, before acting on it.
Quick Answer
In the UK the instrument decides first: HMRC says a spread bettor is not normally carrying on a trade and so is neither taxable on the profits nor given relief for the losses, while retail contracts for differences are financial futures whose outcomes fall under the capital gains regime in almost every case unless taxable as trading income. In Australia, the ATO’s ruling on contracts for differences routes gains to ordinary income where the activity is a business and to a profit-making undertaking where it is not. Both authorities settle trader status on an overall impression, never one test.
The UK: The Instrument Decides First
Spread bets
HMRC’s Business Income Manual is blunt: “betting and gambling, as such, do not constitute trading.” It adds that an individual placing a spread bet “is not normally carrying on a trade” and that “They are not taxable on the profits, nor do they receive relief for their losses” (as published by HMRC in BIM22015, page updated 4 August 2026). Read the second half of that sentence as carefully as the first: no charge comes packaged with no loss relief. HMRC’s dedicated spread betting page adds that the answer turns on “the terms of the contract and the economic substance of what is done” (BIM22020, updated 4 August 2026) — the label on the account is not the end of the analysis.
Contracts for differences
CFDs sit somewhere else. HMRC’s Capital Gains Manual states that “Retail contracts for differences are financial futures, and, unless the profits are taxable as trading income, in almost every case TCGA92/S143 charges the outcomes under the capital gains regime” (as published by HMRC in CG56100, page updated 7 September 2026). The same page brings “all debits and credits to the account, including commission and sums equivalent to interest and dividends” into that computation, so financing charges sit inside the gain figure — the cost stack in forex spreads explained.
Two published figures then set the frame. As published by HMRC on gov.uk, “For the 2026 to 2027 tax year the allowance is £3,000,” with main rates of 18% within the basic rate band and 24% above it from 6 April 2026. On losses, gov.uk says a loss is claimed on your tax return, deducted from same-year gains, carried forward if unused, and reportable up to 4 years after the tax year of disposal (checked 8 September 2026).
The trader question
Where activity is intensive, the question becomes whether HMRC would instead treat it as a financial trade taxed as income. That is settled with the nine badges of trade — profit-seeking motive, number of transactions, nature of the asset, similar transactions, changes to the asset, how the sale was carried out, source of finance, the interval between purchase and sale, and method of acquisition. Courts decide “on the basis of the overall impression gained from a review of all the badges,” and any single badge “is unlikely, by itself, to provide a conclusive answer” (BIM20205). For derivatives, HMRC approaches it “in the same way as you would with somebody claiming to carry on a trade of buying and selling shares” (BIM56880).
Australia: How You Traded Decides First
The CFD ruling
Taxation Ruling TR 2005/15 covers financial contracts for differences and sets out three outcomes. Gains produced by business activity are assessable under section 6-5 of the ITAA 1997, with losses deductible under section 8-1. Gains not produced through business activity are treated as generated from a profit-making undertaking or scheme, assessable under section 15-15 with losses deductible under section 25-40. And where a contract was entered into for the purpose of recreation by gambling, the gain or loss is neither assessable nor deductible, and any capital gain or loss is disregarded under paragraph 118-37(1)(c).
The Australian route for CFDs therefore usually lands on revenue account rather than capital account. The ATO notes it would not ordinarily expect such a contract to be entered into as recreation, so a retail trader should not assume the gambling exception applies to them.
Foreign currency and the business test
Where actual foreign currency is involved rather than a cash-settled derivative, the forex measures in Division 775 apply. The ATO states that forex gains and losses are generally brought to account as assessable income or allowable deductions when realised, triggered by one of five forex realisation events — disposing of foreign currency, and ceasing to have a right or obligation to receive or pay it. Gains of a private or domestic nature are generally excluded (checked 8 September 2026).
Whether the activity is a business is the pivot, and the ATO answers it cumulatively. Its guidance on share investing versus share trading says no one factor is determinative and the overall impression counts, weighing profit-making purpose, the magnitude of the undertaking, an intention to trade regularly and systematically, business-like operation, and volume — and notes that the capital deployed is not crucial. Where the capital gains regime does apply, the CGT discount halves the gain for individuals who have owned the asset at least 12 months, a threshold most short-horizon EA activity never reaches.
UK vs Australia at a Glance
| Axis | United Kingdom | Australia |
|---|---|---|
| Spread bets | Not normally a trade: profits not taxable, losses not relievable (BIM22015) | No distinct published retail FX category; see the CFD ruling |
| CFDs | Financial futures; capital gains regime in almost every case unless taxable as trading income (CG56100) | Ordinary income if a business, otherwise a profit-making undertaking (TR 2005/15) |
| Physical foreign currency | Depends on facts — see gov.uk | Forex realisation events under Division 775 |
| Trader vs investor | Overall impression from the nine badges of trade (BIM20205) | Overall impression; no one factor determinative |
| Loss treatment | No relief on spread bets; capital losses offset same-year gains and carry forward, reportable up to 4 years after the tax year of disposal | Deductible under s8-1 (business) or s25-40 (profit-making undertaking) |
| Record keeping | At least 22 months after the tax year ends, or 15 months after a late return | 5 years from the date you lodge |
| Filing | Self Assessment: register 5 October, paper 31 October, online return and payment 31 January | Lodge by 31 October if lodging your own return |
Where a cell says “depends on facts,” that is the honest answer rather than a gap.
Record Keeping: What Your Statements Need to Show
Both authorities put the evidential burden on you and both start a clock. HMRC says that if you file on time you should keep records “for at least 22 months after the end of the tax year the tax return is for,” or “at least 15 months after you sent the tax return” if it was late. The ATO says you must keep written evidence “for 5 years from the date you lodge your tax return.”
For an automated account, the records that matter are the ones platforms rotate out first: closed-position statements with open and close times, volumes, realised profit or loss, commission and swap charges, plus deposit and withdrawal history. Export them at least annually — reconciling those exports against your own logs is also the only way to check whether a live account behaves like its backtest. One caveat on whose statements you hold: a brand often runs several legal entities, and the one you contract with sets both your regulatory protections and your paperwork, so confirm it with the register-checking method in how to verify a forex broker’s license. If you are opening a new account, open a free XM account and pull a full statement early so you know what the annual export contains.
Plan for the Loss, Not Just the Gain
Most retail traders who trade forex and CFDs lose money — XM’s own risk disclosure states that 75.12% of retail investor accounts lose money trading CFDs with that provider (as published by XM, August 2026, quoted in our XM broker review). A UK spread bet loss attracts no relief at all, while a capital loss on a CFD can be set against gains if reported; in Australia, TR 2005/15 makes losses deductible under the business and profit-making routes but disregards them under the gambling exception. That asymmetry belongs in the instrument decision alongside cost and capital.
FAQ
Is forex trading tax-free in the UK?
Not as a general rule; it depends on the instrument. HMRC says a spread bettor is not normally carrying on a trade, so is not taxable on the profits and gets no relief for the losses (BIM22015, updated 4 August 2026). Retail contracts for differences fall under the capital gains regime in almost every case, unless taxable as trading income (CG56100, updated 7 September 2026).
How does the ATO tax CFD and forex trading in Australia?
TR 2005/15 sets out three routes: business activity means gains are ordinary income and losses deductible; no business but an intent to profit means gains are assessable as a profit-making undertaking; and a contract entered into for recreation by gambling is neither assessable nor deductible. Division 775 separately brings realised foreign currency gains and losses to account.
Does it matter whether I am classed as a trader or an investor?
Yes. HMRC works from the overall impression given by the nine badges of trade, and the ATO says no one factor is determinative. The classification changes which rules apply to your gains and to your losses.
How long do I need to keep my trading records?
HMRC says at least 22 months after the end of the tax year the return is for if you filed on time, or 15 months after a late return, with longer for the self-employed. The ATO says 5 years from the date you lodge.
Further Reading
- How to Verify a Forex Broker’s License Yourself — confirm the legal entity you contract with
- Forex Broker Regulation Explained — what each licence tier covers
- Forex Spreads Explained: What a Round Trip Costs — the cost stack inside the gain figure
- How Much Capital Do You Need to Run a Forex EA? — sizing before tax enters the picture
This article is for educational purposes only and is not tax, legal or financial advice. Tax treatment depends on your individual circumstances and residency, and rules change. Confirm your own position with HMRC, the ATO, or a qualified tax adviser before acting. Trading forex and CFDs on margin carries a high level of risk and may not be suitable for all investors. You could lose some or all of your invested capital. Read our risk disclosure before trading.