By your other income this tax year
Your income matters for the part of the gain that doesn't qualify and for the comparison without relief, because gains are taxed at 18% only while they fit in your remaining basic rate band.
| Other income | Tax with BADR | Without BADR | Saving | You keep |
|---|---|---|---|---|
| £0 | £299,280 | £357,018 | £57,738 | £1,200,720 |
| £20,000 | £299,280 | £357,464 | £58,184 | £1,200,720 |
| £40,000 | £299,280 | £358,664 | £59,384 | £1,200,720 |
| £60,000 | £299,280 | £359,280 | £60,000 | £1,200,720 |
| £150,000 | £299,280 | £359,280 | £60,000 | £1,200,720 |
If you've used some of your £1m lifetime limit
| BADR already used | Qualifying at 18% | Taxed at normal rates | Total tax |
|---|---|---|---|
| £0 | £1,000,000 | £500,000 | £299,280 |
| £250,000 | £750,000 | £750,000 | £314,280 |
| £500,000 | £500,000 | £1,000,000 | £329,280 |
| £750,000 | £250,000 | £1,250,000 | £344,280 |
| £1,000,000 | £0 | £1,500,000 | £359,280 |
2026/27 disposals; £60,000 of other income in the second table; annual exempt amount £3,000 set against the highest-rate gains first; BADR gains use the basic rate band before other gains (HMRC CG21000). Assumes the conditions for relief are met and no losses or other gains.
Above the lifetime limit
Only the first £1m of a £1,500,000 gain can qualify. That slice is taxed at 18%; the other £500,000 is taxed at 24% after the £3,000 annual exempt amount comes off it (HMRC sets the allowance against the highest-rate gains first). Total: £299,280, an effective rate of 20%.
At this size the relief is worth a fixed £60,000 - 6p in the pound on the £1m that qualifies - so most of the bill is ordinary capital gains tax.
Do you qualify?
For company shares, the company must be your personal company - at least 5% of the ordinary shares and voting rights, plus the profit or proceeds test - and you must be an officer or employee, all for the 2 years before the sale. Sole traders and partners must have owned the business for 2 years; assets can still qualify if they are sold within 3 years of the business stopping. The claim deadline for a 2026/27 sale is 31 January 2029.
Your own proceeds, base cost and income
Business Asset Disposal Relief calculator →Frequently asked questions
How much tax do I pay selling a business for a £1,500,000 gain?
With Business Asset Disposal Relief, £299,280 in 2026/27 for a higher-rate taxpayer with no earlier claims (£1,000,000 at 18% and £497,000 at 24%). Without the relief it would be £359,280.
What rate is Business Asset Disposal Relief in 2026/27?
18% for disposals on or after 6 April 2026 (14% in 2025/26, 10% before 6 April 2025), on up to £1 million of qualifying gains over your lifetime.
Do I qualify?
For company shares: at least 5% of the ordinary shares and voting rights (plus the profit or proceeds test), and being an officer or employee, for the 2 years before the sale. Sole traders and partners: owned the business for 2 years. Assets can qualify within 3 years of the business ceasing.
When must I claim?
By the first anniversary of the 31 January after the tax year of the sale - for a sale in 2026/27, 31 January 2029.
Related
Sources
- Business Asset Disposal Relief
- HS275 Business Asset Disposal Relief (2026): rates, lifetime limit, conditions, annual exempt amount, claim deadline
- HMRC Capital Gains Manual CG21000: BADR gains use the basic rate band first
- Capital Gains Tax rates and allowances
- Capital Gains Tax: annual tax-free allowance