Property Flipping Income Tax vs CGT Calculator 2026
Calculate tax on property flipping profits: income tax as trader vs CGT as investor. Compare total tax under both treatments and understand badges of trade.
Property Flipping: Income Tax vs CGT Calculator
If HMRC decides you are a property trader (not investor), profits are taxed as income — not CGT. Badges of trade determine your tax treatment.
Frequently Asked Questions
When is property flipping taxed as income rather than CGT?
If HMRC considers you to be a property trader (rather than an investor), profits are treated as trading income and taxed as self-employment income (income tax + Class 4 NIC) rather than CGT. This is determined by the 'badges of trade'.
What are the 'badges of trade' for property?
HMRC looks at: frequency of transactions, the period of ownership (very short = trading), whether the property was modified for profit, whether you used debt to finance the purchase (indicative of trading), and whether the activity is your main business.
How many flips before HMRC treats it as trading?
There is no fixed number. One flip of a primary residence is unlikely to be trading. Multiple flips in quick succession, with borrowed money, for profit rather than accommodation, are more likely to be trading. HMRC assesses all circumstances holistically.
What is the tax difference between CGT and income tax on property profits?
CGT rates are 18% (basic) / 24% (higher) for residential property. Trading income is taxed at 20-45% income tax, plus Class 4 NIC at 6% / 2%. For a higher-rate taxpayer, the total trading tax can be 44% vs 24% CGT — a significant difference.
Can a builder or developer claim property trading as a business?
Yes — property developers who buy, develop and sell property as their main business are clearly traders. They can claim all relevant business deductions and losses can offset other income. But they must pay income tax and NIC on profits.
Can I claim Private Residence Relief to avoid CGT on a flip?
Only if you genuinely lived in the property as your main home. If you buy, renovate and sell quickly without actually living there, PRR will not apply. HMRC can challenge PRR claims for short-ownership flip properties.
What records should I keep to demonstrate investor intent?
Keep a written investment strategy document created before purchase, showing you intended to hold the property long-term. Evidence of rental income (if let), records of living there, and any communications showing investment rather than trading purpose.
Do stamp duty and agent fees reduce property profit for tax?
Yes — for both CGT and trading income, allowable costs include: SDLT on purchase, legal fees, estate agent fees, mortgage arrangement fees (for capital acquisitions), and improvement costs (not repairs). Basic maintenance repairs are revenue expenditure.