Guides

Plain-English guides for the choices behind the calculators

Use these guides when you want to understand the assumptions, wording and common mistakes behind pay, holiday, timesheet, VAT and savings calculations.

How to estimate take-home pay

Gross pay, tax, National Insurance, pension deductions, student loans and why payslips can differ from an estimate.

Read the take-home pay guide

Hourly pay vs salary

Compare hourly rates and annual salaries while allowing for unpaid time, overtime, pension deductions and uneven work patterns.

Read the hourly vs salary guide

Decimal hours and timesheets

Convert hours and minutes cleanly, avoid decimal-time mistakes and check payroll or invoice time entries.

Read the decimal hours guide

VAT rates and invoice checks

Learn the difference between net, VAT and gross amounts, and why removing VAT is not the same as subtracting 20%.

Read the VAT guide

Savings goals and interest

Plan savings targets with realistic monthly amounts, interest assumptions, slower-plan checks and savings-interest caveats.

Read the savings guide

Clear Calculators guides are general information only. They explain common calculation assumptions and do not replace financial, tax, employment, legal or professional advice.