Payetools.NationalInsurance 1.0.110

Payetools

Cross-platform Open-Source Library for UK payroll

Payetools is the first library of its kind to bring open-source capabilities to UK payroll processing via a robust, cross-platform framework written in C#.

Payetools contains support for calculating the following:

• UK Income Tax (all jurisdictions)
• National Insurance
• Student Loans
• Pensions using Qualifying Earnings and Pensionable Pay earnings bases (under both Relief at Source and Net Pay Arrangement tax treatments)
• Compliance with National Minimum/Living Wage regulations

The code passes HMRC tests for income tax, National Insurance, student loans and National Minimum Wage.

Tests are included for 2022-2023 and 2023-2024 tax year rates and thresholds. 2024-2025 support is due shortly.

Separately, Payetools is currently working on libraries for HMRC RTI and DPS services that sit on top of the core Payetools open-source libraries published here. The Payetools.Hmrc libraries enable the publishing of FPS and EPS submissions to HMRC and the retrieval of notifications (e.g., tax code changes, student loan starts/stops, etc.) from HMRC's Data Provisioning Service (DPS). Payetools.Hmrc will be available as a commercial offering - please contact info [at] payetools.com for further information.

Releases

Releases are made via nuget - search for payetools to see all libraries for this repo or follow this link. Packages are built with compatibility with .NET 6.0, 7.0 and 8.0.

Reference Data

Payetools relies on static reference data to drive tax, NI, etc., calculations (the machine-readable equivalent of HMRC's Rates and thresholds for employers page. There is currently no high availability source of this data, but a version for testing can be found at https://uk-rates-and-thresholds-data.netlify.app/index.json. (Only 2022-2024 and 2023-2024 are currently published but 2024-2025 should be available before end May 2024.)

Documentation

Limited API documentation is available at https://payetools.dev/api/Payetools.html. This is very much a work in progress.

Roadmap

To follow.

Contributing

Given the current pipeline of work, we are not quite ready to receive contributions at this stage but if you are interested in joining the project, please contact payetools via dev [at] payetools.com. Thanks in advance for your interest.

It isn't recommended to fork this repo at this time, on the basis that there are a number of imminent changes in the pipeline. Once again, if there is a feature or capability you require, please contact us in the first instance.

License

This project is licensed under the MIT License.