📌 Introduction

If you’re self-employed in the UK, one of the most common questions is:

👉 “How much tax will I actually pay?”

The answer depends on your income, but the good news is:

👉 You don’t pay tax on everything you earn.

In this guide, we’ll explain exactly how tax works, with simple examples so you can understand what to expect.

 

💼 Step 1: Your Profit (NOT your income)

You are taxed on:

👉 Profit = Income – Expenses

Example:

• Income: £50,000

• Expenses: £10,000

 

👉 Taxable profit = £40,000

 

📊 Step 2: Personal Allowance

👉 The first £12,570 is tax-free

So:

• Profit: £40,000

• Tax-free: £12,570

 

👉 Taxable = £27,430

 

📈 Step 3: Income Tax Rates (2026)

🔹 20% (Basic Rate)

• £12,571 → £50,270

🔹 40% (Higher Rate)

• £50,271 → £125,140

🔹 45% (Additional Rate)

• Over £125,140

💡 Example:

Profit: £40,000

👉 You pay:

• 0% on £12,570

• 20% on £27,430

👉 Income Tax ≈ £5,486

 

🧾 Step 4: National Insurance (VERY important)

🔹 Class 2 NI

• Small weekly amount (if applicable)

🔹 Class 4 NI:

• ~9% on profits between £12,570 and £50,270

• ~2% above that

💡 Example:

Profit: £40,000

👉 Class 4 NI ≈ £2,468

💰 Total Tax Example

For £40,000 profit:

• Income Tax: ~£5,486

• National Insurance: ~£2,468

👉 Total ≈ £7,954

⚠️ Payments on Account (IMPORTANT)

Many people are shocked by this 👇

👉 After your first year, HMRC may ask you to pay:

• Current year tax

• PLUS advance payments for next year

💡 Example:

If your tax bill is £8,000:

👉 You may pay:

• £8,000 (current year)

• £4,000 (advance)

 

👉 Total: £12,000

 

💡 How to Pay LESS Tax (Legally)

👉 You can reduce your tax by:

✔ Claiming all relevant expenses

✔ Using allowances correctly

✔ Planning your income timing

✔ Getting professional advice

 

⚠️ Common Mistakes

❌ Not saving money for tax

❌ Not tracking expenses

❌ Guessing tax instead of calculating

❌ Filing late

 

💡 How DCTaxAgent can help

At DCTaxAgent, we help you:

✔ Calculate your exact tax

✔ Reduce your tax legally

✔ Avoid surprises like Payments on Account

✔ Stay compliant with HMRC

👉 So you always know what you owe — and never overpay

 

🚀 Conclusion

👉 You don’t pay tax on all your income

👉 You pay tax on profit after expenses

👉 Planning ahead can save you thousands

 

❓ FAQ (Very important for SEO)

👉 “Do I pay tax on all my income?”

No — only on profit after expenses.

👉 “When do I pay tax?”

Usually by 31 January each year.

👉 “What are Payments on Account?”

Advance payments towards next year’s tax.

👉 “How much should I save for tax?”

👉 A safe rule: 20%–30% of your profit

👉 “Can I reduce my tax?”

Yes — legally, through expenses and planning.