Confidential Payroll Tax Calculator — Browser-Only, No Data Stored
Calculate payroll taxes, deductions, and net pay for US and UK employees. See federal income tax, Social Security, Medicare, or UK income tax and National Insurance — all computed privately in your browser.
How Payroll Taxes Are Calculated
Payroll taxes fund government programs like Social Security, Medicare (US), or the National Health Service and state pension (UK). They are split between employee and employer, with each paying a portion. This calculator shows both the employee deductions (what comes out of your paycheck) and the total employer cost.
US Payroll Tax Rates (2024)
- Federal Income Tax: Progressive brackets from 10% to 37%
- Social Security (Employee): 6.2% up to $168,600
- Medicare (Employee): 1.45% on all wages
- Social Security (Employer): 6.2% up to $168,600
- Medicare (Employer): 1.45% on all wages
UK Tax Rates (2024/25)
- Personal Allowance: £12,570 (tax-free)
- Basic Rate: 20% on £12,571–£50,270
- Higher Rate: 40% on £50,271–£125,140
- Additional Rate: 45% above £125,140
- Employee NI: 8% on £12,570–£50,270, 2% above
- Employer NI: 13.8% above £9,100
Understanding Your Pay Stub
Your gross salary is your total compensation before deductions. After subtracting federal/income tax, Social Security/NI, Medicare, and any state taxes, you arrive at your net pay — the amount deposited in your bank account. The employer also pays additional taxes on top of your gross salary.
Privacy Guarantee
All salary calculations are performed entirely in your browser. Your compensation data is never sent to any server, stored in any database, or tracked in any way. Close this page and all data disappears.
Tips for Getting Accurate Results
For the most accurate results, use up-to-date numbers from official sources. Double-check your inputs before calculating — small errors in the starting values can lead to significantly different outputs. If you are comparing scenarios, keep all variables the same except the one you are testing. Save or screenshot your results for future reference. This calculator uses standard formulas and is designed to give you a reliable quick estimate, though professional advice may be needed for complex situations.
Frequently Asked Questions
Is my salary data kept private?
Absolutely. All calculations run entirely in your browser. No salary data is sent to any server, stored in any database, or tracked. Your compensation information is 100% confidential.
How accurate are the US federal tax calculations?
The calculator uses 2024 single-filer brackets with the standard deduction ($14,600). It provides a close estimate for most situations, but does not account for itemized deductions, tax credits, or other adjustments. Consult a CPA for exact figures.
What is the difference between employee and employer payroll taxes?
Employees pay income tax plus their share of Social Security (6.2%) and Medicare (1.45%). Employers match the SS and Medicare contributions, making the total FICA rate 15.3%. In the UK, employers pay 13.8% NI on wages above £9,100.
Does this calculate state taxes?
For US calculations, you can enter a state/local tax rate percentage. Since state tax rules vary widely, this provides an approximation. For exact state calculations, check your state tax authority.
Is Confidential Payroll Tax Calculator — Browser-Only, No Data Stored free to use?
Yes, Confidential Payroll Tax Calculator — Browser-Only, No Data Stored is completely free with no sign-up, no login, and no hidden fees. The tool runs entirely in your browser — your data never leaves your device.