You're probably here because you want a straight answer. You've looked up what is corporation tax rate, expecting one number, and instead found several. That's frustrating when you're trying to budget for a year-end bill, decide whether to buy equipment, or work out how much you can safely take as dividends.
For a UK limited company director, the awkward truth is simple. There isn't one corporation tax rate that applies to everyone. The rate depends on your company's profit level, and the part that catches people out is the middle zone where the tax position becomes less intuitive than a flat percentage suggests.
Why 'The' Corporation Tax Rate Does Not Exist
A lot of company directors still think about corporation tax as a single flat charge on profit. That used to be a more practical shortcut than it is now. The system changed in a way that matters for real planning, not just for textbook accuracy.
The UK moved away from a single rate structure when the main corporation tax rate rose from 19% to 25% on 1 April 2023 for companies with profits over £250,000, while companies with profits up to £50,000 remained at 19%, with a middle band in between, as outlined by the Institute for Fiscal Studies overview of corporation tax rates over time.
That means the question isn't really, “What is the corporation tax rate?” The better question is, which rate applies to my company's profits, and what does that mean for the choices I make before year end?
Why directors get caught out
If you run a limited company, you don't pay corporation tax on turnover. You pay it on profit. So two companies with similar sales can face very different tax bills if one has higher costs, pension contributions, or capital spending.
Confusion usually starts when a director reads “25% corporation tax” and assumes that's the whole story. It isn't. Some companies are fully below the lower threshold. Some sit fully above the upper threshold. Many sit in the middle, where the practical planning gets more interesting.
Many online answers stop at the headline number. For a working director, the useful answer is the one that shows how profit level changes the rate that actually bites.
If you want the broader mechanics behind what counts as taxable profit, this guide on how corporation tax works helps put the rate question into context.
The real business issue
For an owner-managed company, this isn't just about compliance. It affects:
- Dividend timing because the corporation tax bill changes the profit left for distribution
- Pension decisions because employer contributions can reduce taxable profit
- Year-end spending because the timing of legitimate costs can change which part of the rate structure you sit in
- Cash flow planning because a higher effective tax drag can appear before you expect it
UK Corporation Tax Rates and Profit Thresholds for 2026
If you want the short version, here it is. UK corporation tax works on profit bands, not one universal number.
The two headline rates
Companies with profits up to £50,000 pay the small profits rate of 19%. Companies with profits above £250,000 pay the main rate of 25%. Profits between £50,000 and £250,000 fall into the marginal relief band.
Here's the quick reference table.
| Profit Level | Applicable Corporation Tax Rate |
|---|---|
| Up to £50,000 | 19% small profits rate |
| Between £50,000 and £250,000 | 25% main rate with marginal relief |
| Above £250,000 | 25% main rate |
What that means in plain English
If your profits sit entirely below the lower threshold, the answer to “what is corporation tax rate” is fairly simple. Your company is in the small profits rate band.
If your profits are comfortably above the upper threshold, the answer is also simple. Your company is in the main rate band.
The awkward territory is the middle. That's where many limited company directors operate, especially if profits move around from year to year. A strong final quarter, a bonus contract, delayed spending, or an employer pension contribution can all change where you land.
Why thresholds matter more than the headline
The thresholds matter because they influence behaviour. A company near the edge of a band often has more planning options than a company that is nowhere near one.
A director whose company is hovering in the middle band may ask questions like:
- Should I make an employer pension contribution before year end?
- Should I bring forward a legitimate business expense?
- Should I leave profit in the company or extract it?
- Should I delay non-essential spending until the new accounting period?
Those aren't abstract tax questions. They affect how much cash stays in the business and how much eventually reaches you personally.
Practical rule: Don't stop at the headline rate. Start by checking which profit band your company is actually in.
How Marginal Relief Works and What It Means for You
Marginal relief is where most of the confusion sits. It sounds technical, but the basic idea is easier than the name suggests.
Think of it as a ramp, not a step
If there were no marginal relief, a company could hit one point in profit and suddenly jump from the lower rate to the higher one in a way that felt abrupt. Marginal relief smooths that change.
A good way to picture it is a ramp instead of a staircase. As profits rise through the middle band, the tax burden rises gradually rather than flipping in one go.
That smoothing sounds comforting, but it hides an important point. For companies in this band, the extra tax cost on the next slice of profit is steeper than many directors expect.
According to the IFS explanation of corporation tax, companies with profits between £50,000 and £250,000 are subject to marginal relief, and this creates an effective marginal tax rate of 26.5% on profits in that band.
Why the 26.5% figure matters
This is the point many guides miss. You might hear “the main rate is 25%” and assume each extra pound of profit above the lower threshold is taxed at that level. In the marginal relief band, that isn't how it feels economically.
The tax cost of an extra pound of profit can be higher than the headline 25% while marginal relief applies. That's why year-end planning can matter more in this band than it does when profits are clearly below or above the thresholds.
Here's the practical interpretation:
- Below the lower threshold, your profit is taxed at the small profits rate.
- Inside the middle band, the next slice of profit can be more tax-sensitive.
- Above the upper threshold, you're into the main rate territory without the same marginal relief mechanics.
Why directors should care
If your company is in the marginal relief zone, a decision that changes profit before year end can have a sharper effect than you expect. That doesn't mean you should spend money carelessly to save tax. It does mean timing matters when you were going to incur the cost anyway.
Examples include:
- Employer pension contributions that reduce taxable profit
- Allowable business expenses that you were due to incur in the period
- Investment timing where asset purchases are commercially sensible
- Profit extraction planning because corporation tax affects what remains for dividends
A short explainer can help if you want to hear the mechanics discussed out loud:
The middle band is where a director can feel caught between two systems. You're no longer in the simple small-profits world, but you're not just applying a clean 25% either.
Where people misread marginal relief
A common mistake is to think marginal relief means “some profits are taxed at 19% and the rest at 25%” in a simple split. In practice, the mechanism is there to reduce the tax that would otherwise arise under the main rate calculation. That's why the effective position in the band needs care.
Another mistake is to focus only on this year's bill. If one decision pushes profit into a less efficient spot this year but improves next year's trading position, the commercial outcome may still be right. Tax should inform decisions, not run the business on its own.
Calculating Corporation Tax Worked Examples
Theory is useful. Actual numbers are better. Here are four worked examples that show how the bands change the final bill.
Example one with profits of £40,000
This company is fully within the small profits band.
- Profit: £40,000
- Rate: 19%
- Corporation tax: £7,600
Calculation:
£40,000 × 19% = £7,600
This is the cleanest case. The director can budget with relative confidence because the company is below the lower threshold.
Example two with profits of £80,000
This company is inside the marginal relief band.
- Profit: £80,000
- Main-rate calculation: Profit × 25%
- Marginal relief: £1,530
- Corporation tax: £18,470
Calculation:
£80,000 × 25% = £20,000
£20,000 – £1,530 = £18,470
The headline rate starts to mislead. If you only looked at 25%, you'd overstate the final bill. If you assumed a simple 19% or 25% split, you'd also miss the actual outcome.
Example three with profits of £200,000
This company is still inside the marginal relief band, but much closer to the upper end.
- Profit: £200,000
- Main-rate calculation: Profit × 25%
- Marginal relief: £450
- Corporation tax: £49,550
Calculation:
£200,000 × 25% = £50,000
£50,000 – £450 = £49,550
The relief is much smaller here. That tells you something important. As profit moves up the band, the company gets less benefit from the relief mechanism.
Example four with profits of £300,000
This company is above the upper threshold.
- Profit: £300,000
- Rate: 25%
- Corporation tax: £75,000
Calculation:
£300,000 × 25% = £75,000
No marginal relief applies here. The company is firmly in the main rate band.
What these examples show
The worked examples reveal three practical lessons.
The answer changes with profit level
Asking for one corporation tax rate misses the point if profits can move between bands.The middle band needs active attention
Small changes to profit can alter the final bill in ways that don't feel obvious from the headline rates.Planning is often about thresholds, not tricks
The useful question is whether a legitimate action you were already considering should happen before or after year end.
If your profits are near a threshold, don't rely on rough mental maths. That's where simple assumptions usually break down.
The Link Between Corporation Tax and Your Personal Income
Many directors treat corporation tax and personal tax as separate problems. In real life, they're joined at the hip. Corporation tax is the first reduction applied to company profit before you think about dividends from what remains.
That's why the rate structure matters beyond the company accounts. If the company pays more corporation tax, there is less post-tax profit available for extraction, reinvestment, or both.
Why profit extraction depends on the band you're in
The planning issue isn't just “how much tax does the company pay?” It's “how much is left after company tax, and what is the cleanest way to turn that into personal value?”
The background point is well put in this discussion of how tiered corporation tax rates affect profit extraction. Directors often search for a single rate, but the practical issue is whether profits fall into the 19% band, the marginal relief band, or the 25% band, because that affects decisions on dividends and pension contributions.
The chain reaction
Think about the flow like this:
- Your company earns profit
- Corporation tax is charged on that profit
- The remaining amount stays in the company
- You decide whether to draw dividends, keep cash in the business, or use another route such as pension funding
Each step influences the next. If your pre-tax profit sits in the middle band, an employer pension contribution made before year end may reduce taxable profit and also reduce the amount trapped in a less efficient band. That can improve both company and personal outcomes, depending on your wider position.
Common director decisions affected by corporation tax
Dividend planning
If post-tax profit is lower than expected, dividend capacity drops.Salary choice
Remuneration decisions affect company profit and therefore corporation tax.Pension contributions
Employer contributions can change the taxable profit figure and shift the extraction mix.Retaining profits
Keeping money in the company may be sensible if you want working capital or future investment firepower.
If you're trying to model how company decisions affect what lands in your own pocket, a salary after tax calculator can help you compare the personal side of the equation.
Corporation tax isn't just a company expense. It decides how much profit survives long enough to become your income.
Strategies to Legally Reduce Your Corporation Tax Bill
The best corporation tax planning usually looks boring from the outside. It's about using the rules properly, keeping records tight, and making sensible decisions before the year closes instead of after.
Start with taxable profit, not the rate
Many directors obsess over the percentage and ignore the base it applies to. That's backwards. Your corporation tax bill depends on taxable profit, so reducing taxable profit legitimately is often the most direct lever.
That means checking whether you are claiming every allowable cost the business has incurred. Missed expenses don't just create untidy books. They can leave you paying tax on profit you didn't really keep.
Practical areas to review
Allowable expenses
Review recurring costs, subscriptions, travel that qualifies, professional fees, and other business spending. Small omissions can add up, especially if your profit is near a threshold.Employer pension contributions
For many owner-managed companies, this is one of the cleaner planning tools. It can reduce company profit while directing value toward long-term personal wealth rather than immediate extraction.Capital expenditure timing
If the company is going to buy equipment or software for commercial reasons, timing can matter. The tax treatment depends on the item and the circumstances, so this is an area where details matter.R&D relief where relevant
Some companies overlook this because they assume “research and development” only applies to labs or tech firms. In practice, eligibility depends on the work undertaken, and it needs proper review rather than guesswork.
The right mindset for year-end action
Don't spend £1 to save a fraction of tax unless the spending also makes business sense. A pointless purchase is still a pointless purchase. Good planning means bringing forward costs you needed anyway, not creating waste.
A useful review often starts with questions like these:
- What profit range are we heading toward before year end?
- Are there legitimate employer pension contributions to make?
- Have all business expenses been captured correctly?
- Are any planned purchases commercially justified this period?
- Is dividend extraction still the right move, or should profit stay in the company?
For directors who want a structured overview of legitimate options, this guide to reducing corporation tax in the UK is one place to compare strategies. Tax Compass provides educational tools and decision support for limited company tax planning, which can be useful before taking personalized advice.
Reality check: Good tax planning is usually about timing, structure, and accuracy. It isn't about last-minute gimmicks.
Corporation Tax Deadlines and When to Get Help
Understanding the rate is only half the job. You also need to deal with the deadlines and know when the calculation has become too sensitive for DIY estimates.
For most companies, corporation tax must be paid 9 months and 1 day after the end of the accounting period, and the company tax return is normally due 12 months after the end of the accounting period. Put those dates in the diary early. A tax bill is much easier to manage when you've planned for it through the year.
Signs your situation needs a closer review
Some companies can keep things straightforward. Others hit complexity quickly.
You should usually get help if:
- You have associated companies because that can affect how thresholds apply
- Your profits move sharply year to year and you keep drifting across bands
- You're planning major spending and want to understand the timing effect properly
- You have multiple directors or shareholders and extraction planning is becoming messy
- You're balancing dividends against pension contributions and want a joined-up answer rather than isolated tax calculations
If your company is anywhere near the marginal relief zone, a quick review can often be more valuable than another hour of internet searching. The point isn't to chase clever tricks. It's to make sure the rate you think applies is the rate that actually matters in your accounts and in your own take-home position.
If you want a clearer picture of how corporation tax, dividends, salary, and pension decisions fit together, Tax Compass offers practical guidance for UK limited company directors who want to understand their options before making year-end decisions.