Calculators that answer the money questions
Six free tools built around UK tax rules and real startup costs. Nothing to install, no account, and your numbers never leave your browser.
Plan the numbers before you spend
Payslips, PAYE and National Insurance
Built using UK PAYE and HMRC payroll rules, powered by the same calculation engine as our employer payroll system. Estimates only — official payslips come from a finalised payroll run.
UK Payslip Generator
Produce a payslip estimate showing payments, deductions and net pay for any UK pay period.
UK Salary Calculator
See take-home pay after PAYE, National Insurance, pension and student loan deductions.
PAYE Calculator
Work out PAYE Income Tax on any tax code, including Scottish, Welsh, K and emergency codes.
National Insurance Calculator
Employee National Insurance by category letter, earnings period and threshold.
Employer NI Calculator
Employer secondary National Insurance contributions on any salary.
Payroll Cost Calculator
The true cost of an employee: gross pay, employer NI and employer pension combined.
Need to run real payroll?
Add your employees, run each pay period and issue payslips from the stored payroll record.
Get the most out of each tool
Startup Cost Calculator
Add every launch cost plus a contingency buffer and see the true amount of cash you need.
Business Name Generator
Generate brandable UK business names from your keywords, with .co.uk domain ideas.
Business Plan Generator
Produce a lender-ready business plan you can copy or download as a text file.
Pricing Calculator
Work out the hourly and day rate you must charge to hit your target take-home pay.
Self-Assessment Estimator
Estimate Income Tax and Class 4 National Insurance on your self-employed profit.
Runway Calculator
See how many months your savings last as revenue grows month on month.
Common questions
Does it support Scottish and Welsh tax codes?
The Self-Assessment Estimator uses 2025/26 England and Northern Ireland Income Tax rates and bands.
Do my numbers leave my browser?
No. Every calculator on this page runs entirely in JavaScript in your browser. Nothing is sent to a server or stored.
How accurate are these estimates?
They are planning estimates based on standard UK tax rules and typical costs. Confirm figures with an accountant before you rely on them.
Where can I run real UK payroll?
Use our payroll calculators below for one-off estimates, or open the full payroll tool to run pay periods and issue payslips.