Historical UK Corporation Tax Rates

This list shows the history of UK corporation tax rates and thresholds from 1971 to 2023.

Pro-Rata Taxable Profits and Tax

The UK fiscal year runs from April 1st to March 31st. Most companies' financial years will differ from this though, creating overlaps. 

HMRC breaks down the overlapping financial year's taxable profit into two pro-rata tax periods.

Each are then subject to HMRC's appropriate allowances and adjustments, creating two separate taxable profits. The appropriate tax rates are then applied to each, which together arrives at the company's year-end corporation tax charge.

When creating forecasts using Figurewizard, all of this automatically calculated and applied by its system. No intervention is called for from the user.

 From  April 1st. Starting Profit Threshold Small Rate Profit Threshold Starting Rate of Tax Small Profit Rate of Tax Standard Rate of Tax
1971 - - - 40% 40%
1972 - - - 40% 40%
1973 - 25,000 - 42% 52%
1974 - 25,000 - 42% 52%
1975 - 30,000 - 42% 52%
1976 - 40,000 - 42% 52%
1977 - 50,000 - 42% 52%
1978 - 60,000 - 42% 52%
1979 - 70,000 - 40% 52%
1980 - 80,000 - 40% 52%
1981 - 90.000 - 40% 52%
1982 - 100,000 - 38% 52%
1983 - 100,000 - 30% 50%
1984 - 100,000 - 30% 45%
1985 - 100,000 - 30% 40%
1986 - 100,000 - 29% 35%
1987 - 100,000 - 27% 35%
1988 - 100,000 - 25% 35%
1989 - 150,000 - 25% 35%
1990 - 200,000 - 25% 34%
1991 - 250,000 - 25% 33%
1992 - 250,000 - 25% 33%
1993 - 250,000 - 25% 33%
1994 - 300,000 - 25% 33%
1995 - 300,000 - 25% 33%
1996 - 300,000 - 24% 33%
1997 - 300,000 - 21% 31%
1998 - 300,000 - 21% 31%
1999 - 300,000 - 20% 30%
2000 10,000 300,000 10% 20% 30%
2001 10,000 300,000 10% 20% 30%
2002 10,000 300,000 0% 19% 30%
2003 10,000 300,000 0% 19% 30%
2004 10,000 300,000 0% 19% 30%
2005 10,000 300,000 0% 19% 30%
2006 - 300,000 - 19% 30%
2007 - 300,000 - 20% 30%
2008 - 300,000 - 21% 28%
2009 - 300,000 - 21% 28%
2010 - 300,000 - 21% 28%
2011 - 300,000 - 20% 26%
2012 - 300,000 - 20% 24%
2013 - 300,000 - 20% 23%
2014 - 300,000 - 20% 21%
2015 - N/A - 20% 20%
2016 - N/A - 20% 20%
2017 - N/A - 19% 19%
2018 - N/A - 19% 19%
2019 - N/A - 19% 19%
2020 - N/A - 19% 19%
2021 - N/A - 19% 19%
2022 - N/A -. 19% 19%
2023 - 50,000 19% 25% 25%

Marginal relief

Up to 2015 a company with taxable profits that were greater than £300,000 and not more than £1,500,000 were entitled to claim additional tax relief by way of marginal relief.

As corporation tax for all company profits regardless of size is now unified, marginal relief has not applied since then.

However a new marginal relief element is to be introduced for fiscal year starting in fisal year 2023./ 2024 for taxable profits between £250,000 and £50,000.

Forecasting Corporation Tax

Figurewizard forecasts will apply these rates of corporation tax working from your finanical year start date. 

Simply applying corporation tax to pre-tax profit is a mistake. Corporation tax is calculated from taxable profit which is very different to that. A correct corporation tax forecast matters as its payment will very likely to have a significant effect on your Liquidity and Cash Flow Forecasts..

Taxable Profit

When forecasting using Figurewizard you will see that the tax as a percentage of pre-tax profit will differ from the rate or rates applicable.

A common and important example of this is depreciation, which is not tax-deductible as it is a provision that does not involve cash transfers.

For the purposes of UK corporation tax, depreciation is  substituted for by capital allowances, which in any case usually allow greater tax-relief. Similarly other "provisions" such as for bad debts will also be excluded.

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