National Insurance and Income Tax Calculator for UK contractors

National Insurance

https://www.gov.uk/national-insurance-rates-letters

Employee National Insurance rates

How much employers deduct from employees’ pay for the 2018 to 2019 tax year.

£116 to £162 a week (£503 to £702 a month) 0%
£162.01 to £892 a week (£702.01 to £3,863 a month) 12%
Over £892 a week (£3,863 a month) 2%

Employer National Insurance rates

How much employers pay towards employees’ National Insurance for the 2018 to 2019 tax year.

£116 to £162 a week (£503 to £702 a month) 0%
£162.01 to £892 a week (£702.01 to £3,863 a month) 13.8%
Over £892 a week (£3,863 a month) 13.8%

Income Tax rates and bands

https://www.gov.uk/income-tax-rates

The tax rates you pay in each band if you have a standard Personal Allowance of £11,850.

Personal Allowance Up to £11,850 0%
Basic rate £11,851 to £46,350 20%
Higher rate £46,351 to £150,000 40%
Additional rate over £150,000 45%

You don’t get a Personal Allowance on taxable income over £123,700.

Available Scripts

In the project directory, you can run:

npm start

Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

npm test

Launches the test runner in the interactive watch mode.

npm run build

Builds the app for production to the build folder.

npm run deploy

Builds and publish the app.

This project was bootstrapped with Create React App.