High Taxation Explained: Ways to Reduce Your Tax Bill

High taxation means paying a large share of your income in tax, usually because of how much you earn or how you're paid.

If your tax bill is higher than you expected, understanding what's driving it is the first step to reducing it.

This guide explains the most common reasons for high taxation and the practical, legal steps you can take to lower your bill. 

Key points

• Review your business structure as profits increase 🏢
  Sole traders pay Income Tax and National Insurance on all their profits. Limited company directors pay Corporation Tax on company profits and only pay personal tax on what they withdraw. If your profits grow, switching structure could cut your overall bill.
• Unclaimed expenses are one of the most common reasons for an inflated bill 🧾
  Many self employed people pay high tax because they don't claim everything they're entitled to. Reviewing your spending regularly, rather than reconstructing it at year-end, helps you catch the small and irregular costs that often get missed.
• You can reduce your tax bill legally by planning ahead 📅
  Keeping accurate records and reviewing your position before the tax year ends on 5 April can help you identify opportunities to reduce what you owe. Leaving this until you file your return usually means the opportunity to act has already passed.
• Proper record keeping makes tax planning possible 🚀
  ANNA brings your bookkeeping, receipt capture, and real-time tax estimates together in one place, so you can spot savings while there's still time to act and keep more of what you earn.

What is high taxation?

Whether your tax bill is considered high depends on your circumstances. Someone earning £35,000 a year will have a different tax position from someone earning £150,000 or running a profitable limited company.

The UK has a progressive tax system. Most people can earn up to the Personal Allowance (£12,570 for 2026/27) before paying Income Tax. 

Once your taxable income exceeds that allowance, different tax rates apply to different portions of your income as your earnings increase. 

Crossing a tax threshold doesn't mean all of your income is taxed at the higher rate – only the income above that threshold is.

Income Tax thresholds for the 2026/27 tax year

The main Income Tax thresholds for England, Wales, and Northern Ireland are:

These thresholds are currently frozen until April 2028. 

However, that doesn’t mean you’re automatically in the clear. As wages rise, more people can move into higher tax bands without any change to the tax rates. This is known as fiscal drag.

Corporation Tax rates for 2026/27

If you run a limited company, you pay Corporation Tax on your profits instead of Income Tax.

Corporation Tax is a flat rate applied to your company's profits, not a progressive system with different bands taxed at different rates.

Companies with profits up to £50,000 pay the small profits rate of 19%. Profits above £250,000 are taxed at the main rate of 25%. 

If your profits fall between these two thresholds, you pay the main rate but reduce it using marginal relief, so your effective rate sits somewhere between 19% and 25%. 

Other taxes that may affect your bill

Depending on your circumstances, you may also pay:

• National Insurance contributions if you’re self employed
• Dividend tax if you take profits as dividends
• Capital Gains Tax when selling certain assets
• VAT if your business is VAT registered
• Stamp Duty Land Tax when buying property in England

Why is your tax bill so high?

A higher tax bill isn't always caused by higher tax rates. It often comes down to changes in your income, the way you earn it, or deductions you haven't claimed.

Here are the most common reasons why your bill might seem higher than usual:

Your income has increased

A pay rise, extra freelance work, or higher business profits can push part of your income into a higher tax band. You'll still keep more money overall, but you'll pay more tax.

Your company's profits have grown

As your company's profits rise above £50,000, marginal relief gradually increases your effective Corporation Tax rate. 

Once profits exceed £250,000, all profits are taxed at the main rate of 25%.

You have more than one source of income

If you earn money from a mix of sources, say employment plus freelance work or rental property, each source may be taxed differently. Combined, they can increase your overall tax bill.

You haven't claimed allowable expenses

Many self employed people pay more tax because they don't claim every business expense they're entitled to.

You can deduct expenses that are wholly and exclusively for your business, including:

• Office supplies
• Professional subscriptions
• Business insurance
• Marketing costs
• Business travel
• Software subscriptions
• Phone and internet costs used for business
• Accountant fees

Your Personal Allowance has been reduced

If your adjusted net income exceeds £100,000, your Personal Allowance starts to be reduced. It falls by £1 for every £2 of income above the threshold.

Once your income reaches £125,140, your Personal Allowance is used up, and you no longer get any tax-free allowance.

🧠 Good to know

If your income is close to £100,000, reviewing your tax position and acting before the end of the tax year can help preserve your Personal Allowance. Pension contributions or Gift Aid donations can reduce your adjusted net income in some cases. 

If you’re unsure which rules apply to you, it’s a good idea to speak to an accountant.

You left your tax planning until the deadline

Many self employed people don't think about tax until it's time to complete their Self Assessment return.

By then, most opportunities to reduce that year's tax bill have already passed. Reviewing your income and expenses regularly gives you more time to claim available reliefs and plan ahead.

The effects of high taxation

A higher tax bill affects more than the amount you take home. It can:

• Reduce your available income: Higher tax payments leave less money for household costs, business spending, savings, and investment.
• Increase cash flow pressure: Self employed people often pay tax in instalments rather than through PAYE, and limited companies have to pay Corporation Tax by a set deadline regardless of cash in the bank. This can make payments harder to manage without planning ahead. 
• Increase administrative workload: Multiple income sources, such as employment, self employment, rental income, or investments, mean more records to keep and more information to report to HMRC. 
• Increase the risk of errors: More complex finances make it easier to overlook taxable income, miss allowable expenses, or make mistakes on your tax return. 

How to reduce your tax bill legally

Here’s how you can bring your tax bills down:

Claim every allowable expense

Beyond the claimable day-to-day costs, don't overlook one-off or irregular expenses, such as training courses, equipment repairs, or relevant household costs if you work from home. These are easy to miss if you only review your accounts once a year.

Use available tax reliefs

Depending on your circumstances, you may be able to claim relief on:

• Pension contributions
• Gift Aid donations
• Trading losses
• Capital allowances on qualifying equipment
• Business asset reliefs

Keep accurate records

Accurate records make it easier to complete your tax return and support your claims if HMRC asks for evidence. You'll need to keep invoices, receipts, and other records for at least five years after the 31 January filing deadline following the end of the tax year. 

💡 Did you know?

ANNA’s receipt scanner lets you photograph receipts in the app and match them to your transactions, so you don't have to search through paper records when it's time to file your tax return.

Separate business and personal finances

Using the same account for business and personal spending turns bookkeeping into a guessing game. A dedicated business account gives you a clear view of your income and expenses, and makes it easier to identify what you can and can't claim.

How ANNA helps you reduce your tax bill

Proper record-keeping is the foundation of tax planning. Without accurate, up-to-date records, you can't spot expenses you're missing, plan around thresholds, or set enough aside to avoid interest and penalties on late or underpaid tax.

ANNA brings your business account, bookkeeping, and tax tools together, so you can see your tax position clearly and act on it.

With ANNA, you get:

• Automatic bookkeeping: Categorises your income and expenses as you go, so you always know your true taxable profit rather than finding out at year-end
• Receipt capture: Scans receipts and matches them to transactions, ensuring every allowable expense is accounted for and backed by evidence if HMRC asks
• Real-time tax estimates: Updates your estimated bill as your income changes, so you can spot when you're approaching a higher tax band while there's still time to plan around it
• Smart pots: Sets money aside for your tax bill throughout the year, so payments on account or a Corporation Tax bill don't catch you short and lead to late payment interest
• Making Tax Digital support: Automatically fills out and submits eligible returns through HMRC-recognised software, reducing the errors that lead to penalties
• 24/7, human tax support: Lets you get help from tax specialists if you need to check whether a relief or allowance applies to you

Sign up with ANNA today, use accurate records to claim every expense you're entitled to, and keep your tax bill as low as possible.