UK tax rates and thresholds determine how much Income Tax, National Insurance and student loan repayment is deducted from your income. This guide explains the main thresholds used by SalaryHub calculators and links to detailed tax year guides where available.
Tax thresholds matter because they decide when deductions start, when higher tax rates apply, and how much of your gross income becomes take-home pay. They are especially important when comparing salaries, checking payslips, reviewing a pay rise, estimating a bonus, or looking back at previous tax years.
Tax Rates and Thresholds by Year
Each UK tax year can have different Income Tax bands, National Insurance thresholds, student loan repayment thresholds and VAT limits. Use the tax year guides below to see the figures used for each year.
Income Tax Bands and Personal Allowance
Income Tax is charged on taxable income after your Personal Allowance has been applied. The Personal Allowance is the amount most people can earn before Income Tax becomes due.
UK Income Tax is progressive. This means different portions of your income are taxed at different rates. Moving into a higher tax band does not mean all of your income is taxed at that higher rate. Only the part above the relevant threshold is taxed at the higher rate.
For most employees, Income Tax is deducted through PAYE using a tax code. A common standard tax code is 1257L, which usually reflects the standard Personal Allowance. However, your tax code may differ if you have taxable benefits, multiple jobs, pension income, previous underpaid tax or other HMRC adjustments.
SalaryHub’s calculators use the selected tax year to estimate Income Tax based on the relevant Personal Allowance, tax bands and rates. This helps produce more accurate results when comparing current and historic tax years.
National Insurance Thresholds
National Insurance is separate from Income Tax and has its own thresholds and rates. Employees usually pay employee National Insurance through payroll, while self-employed workers may pay Class 4 National Insurance based on profits.
Employee National Insurance typically has a lower threshold where contributions begin and an upper earnings limit where the main rate changes to a lower additional rate. Self-employed National Insurance uses similar concepts but different threshold names.
National Insurance can make a noticeable difference to take-home pay, especially for people earning within the main NI band. This is why two people with the same taxable income can still see different deductions depending on employment type.
Student Loan Repayment Thresholds
Student loan repayments are based on your repayment plan and income. They are not calculated like a normal personal loan. Instead, repayments usually apply only to income above the relevant annual threshold.
Common repayment types include Plan 1, Plan 2, Plan 4, Plan 5 and Postgraduate Loans. Most undergraduate plans use a 9% repayment rate above the relevant threshold, while Postgraduate Loans usually use a 6% repayment rate.
Student loan thresholds can change between tax years. That means a salary may trigger a repayment in one year but not another, or produce a different monthly deduction depending on the selected tax year.
Why Tax Thresholds Affect Take-Home Pay
Gross salary is not the same as take-home pay. Your final net pay depends on several deductions, including Income Tax, National Insurance, pension contributions and student loan repayments.
Tax thresholds decide when these deductions start and when they increase. A pay rise, bonus or extra income can push part of your income into a new band, reduce your Personal Allowance, or trigger student loan repayments.
Thresholds also matter historically. If you are reviewing an old payslip, checking a previous P60, comparing salary over time or estimating tax for a previous year, it is important to use the correct tax year rather than the current one.
This is why SalaryHub includes tax year selection across relevant calculators. It allows you to estimate deductions using the rules for a specific year, not just the latest available tax year.
Use SalaryHub Calculators
SalaryHub calculators use structured tax year data to estimate deductions and take-home pay. You can use them to compare different tax years, salary levels, employment types and deduction settings.
- Salary Calculator
- Income Tax Calculator
- Student Loan Calculator
- Bonus Pay Calculator
- Take-Home Pay Over the Years Calculator
Estimate Your Take-Home Pay
Use the SalaryHub Salary Calculator to estimate Income Tax, National Insurance, pension deductions, student loan repayments and take-home pay.
Use the Salary CalculatorFrequently Asked Questions
What are UK tax thresholds?
UK tax thresholds are income levels where a tax, deduction or rate begins to apply. Examples include the Personal Allowance, Income Tax band limits, National Insurance thresholds and student loan repayment thresholds.
Why do tax thresholds change by year?
Tax thresholds can be updated by the government as part of tax year changes. Some thresholds may rise, fall or remain frozen. Even when rates stay the same, frozen thresholds can still increase tax paid if wages rise.
Which tax year should I use?
For current take-home pay estimates, use the latest available tax year. For old payslips, P60 checks, historic comparisons or previous tax calculations, use the tax year that matches the income period you are reviewing.
Do SalaryHub calculators use these thresholds?
Yes. SalaryHub calculators use the selected tax year to estimate Income Tax, National Insurance, student loan repayments and other deductions where relevant.
Are Scottish Income Tax bands included?
SalaryHub’s current tax year model is focused on the England, Wales and Northern Ireland Income Tax structure. Scottish Income Tax bands can differ for some types of income.
Final Thoughts
UK tax rates and thresholds are the foundation of take-home pay calculations. They influence how much Income Tax and National Insurance you pay, when student loan repayments begin, and how much of your salary or bonus reaches your bank account.
By linking each calculator to a clear tax rates and thresholds guide, SalaryHub can make its assumptions easier to understand while building a stronger, more useful tax information hub for users.