Estimate Your Self-Assessment Tax in Seconds
Calculate estimated income tax, National Insurance, and potential payment on account based on your income and deductions. Built for UK taxpayers by RR Accountants.
Useful for freelancers, sole traders, contractors, landlords, and anyone preparing for self-assessment.
Tax Year & Profile
Income & Expenses
Personal Settings
Estimated Self-Assessment Tax
£11,254.65
Based on the details entered, this is your estimated total self-assessment liability.
Total Income
£48,000.00
Allowable Expenses
£12,000.00
Taxable Profit
£48,000.00
Personal Allowance
£12,570.00
Income Tax
£7,086.00
Class 2 NI
£179.40
Class 4 NI
£2,125.80
Student Loan
£1,863.45
Total Liability
£11,254.65
Effective Tax Rate
23.45%
Estimated Net Income
£36,745.35
76.5% retained
Estimated Payment on Account
£5,627.33
If applicable, HMRC may require two advance payments of this amount towards your next tax bill. This is a simplified estimate only.
Tax Breakdown
Insight
Your allowable expenses of £12,000.00 reduce your taxable trading profit from £60,000.00 to £48,000.00.
Your estimated National Insurance includes Class 2 (£179.40) and Class 4 (£2,125.80) contributions on self-employed profits.
Payment on account may apply. HMRC may require two advance payments of £5,627.33 towards your next year's tax bill.
For tailored filing advice and expense optimisation, speak with RR Accountants.
Disclaimer: This calculator provides general estimates for planning purposes only. Your actual self-assessment tax position may differ depending on your records, allowances, tax code, income mix, reliefs, and personal circumstances.
Need help filing or reducing surprises?
Self-assessment is more than just submitting a return. RR Accountants helps freelancers, sole traders, landlords, and business owners manage filing, expenses, tax planning, and ongoing compliance properly.
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What this calculator helps you estimate
Income Tax Estimate
See how your taxable income may translate into income tax.
National Insurance
Estimate Class 2 and Class 4 NIC where applicable.
Payment on Account
Understand whether your next tax year may include advance payments.
Profit & Deductions Context
See how expenses and other inputs affect your overall position.
This calculator is designed to provide a useful estimate for planning purposes. For tailored advice on self-assessment, expenses, filing, and tax planning, speak with RR Accountants.
Frequently Asked Questions
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RR Accountants supports sole traders, freelancers, landlords, and growing businesses with self-assessment returns, bookkeeping, VAT, payroll, year-end accounts, and ongoing financial advice.