PolicyEngine UK

PyPI version Code style: black

For microsimulation, use policyengine.py. Society-wide microsimulation — population aggregates and distributional or budgetary impacts — is moving to the managed policyengine.py bundle, which pins certified, calibration-gated datasets. Direct microsimulation via policyengine-uk (Microsimulation()) is deprecated and being migrated to policyengine.py. This package remains the home of the UK tax-benefit rules and household-level calculations. Microsimulation results are estimates.

PolicyEngine UK is PolicyEngine's microsimulation model of the UK tax-benefit system. It uses the PolicyEngine Core microsimulation framework, which is based on OpenFisca.

The elements are described in different folders. All the modelling happens within the policyengine_uk folder.

  • The rates and other system parameters are in the parameters folder.
  • The formulas and inputs are in the variables folder.
  • This country package comes also with reforms in the reforms folder.

The files that are outside from the policyengine_uk folder are used to set up the development environment. Installation instructions are located along with other documentation in the docs folder.

The model supports multiple different input datasets provided by the user, one of which is the Family Resources Survey,1 containing microdata on household incomes across the UK. PolicyEngine UK enhances this dataset by fusing it to other surveys and reweighting it to minimize a comprehensive loss metric that measures the difference from an array of administrative totals.

Fast setup instructions (Linux / macOS)

  1. Run pip install policyengine-uk

  2. Run policyengine-uk and go through the prompt to setup microdata.

Contact

The primary maintainer for PolicyEngine UK is Nikhil Woodruff, co-founder and CTO of PolicyEngine (nikhil@policyengine.org).

Citation

You may cite the source of your analysis as "PolicyEngine UK release #.#.#, author's calculations."

  1. Department for Work and Pensions, Office for National Statistics, NatCen Social Research. (2021). Family Resources Survey, 2019-2020. [data collection]. UK Data Service. SN: 8802, http://doi.org/10.5255/UKDA-SN-8802-1 ↩

Project links

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Credits

Author: PolicyEngine

Maintainer: Nikhil Woodruff

GitHub Statistics

Data verified by PyPI on Oct 16, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

AGPL-3.0
View SPDX License List

Requires

Python >=3.11

Provides Extra

dev

Tags

benefit microsimulation social tax

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Metadata

Project links

Data verified by PyPI on Oct 16, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

PyPI data
Data sourced directly from PyPI's database.
  • Released:
Latest release

1 maintainer

PyPI data
Data sourced directly from PyPI's database.
Avatar for policyengine from gravatar.com policyengine

Credits

Author: PolicyEngine

Maintainer: Nikhil Woodruff

GitHub Statistics

Data verified by PyPI on Oct 16, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

AGPL-3.0
View SPDX License List

Requires

Python >=3.11

Provides Extra

dev

Tags

benefit microsimulation social tax

Classifiers

Report project as malware

Release files for policyengine-uk 2.134.7

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2 release files

0.56.0

2 release files

0.55.4

2 release files

0.55.3

2 release files

0.55.2

2 release files

0.55.1

2 release files

0.55.0

2 release files

0.54.0

2 release files

0.53.0

2 release files

0.52.0

2 release files

0.51.1

2 release files

0.51.0

2 release files

0.50.1

2 release files

0.50.0

2 release files

0.49.1

2 release files

0.49.0

2 release files

0.48.0

2 release files

0.47.0

2 release files

0.46.0

2 release files

0.45.1

2 release files

0.45.0

2 release files

0.44.3

2 release files

0.44.2

2 release files

0.44.1

2 release files

0.44.0

2 release files

0.43.0

2 release files

0.42.1

2 release files

0.42.0

2 release files

0.41.11

2 release files

0.41.10

2 release files

0.41.9

2 release files

0.41.8

2 release files

0.41.7

2 release files

0.41.6

2 release files

0.41.5

2 release files

0.41.4

2 release files

0.41.3

2 release files

0.41.2

2 release files

0.41.1

2 release files

0.41.0

2 release files

0.40.0

2 release files

0.39.0

2 release files

0.38.6

2 release files

0.38.5

2 release files

0.38.4

2 release files

0.38.3

2 release files

0.38.2

2 release files

0.38.1

2 release files

0.38.0

2 release files

0.37.6

2 release files

0.37.5

2 release files

0.37.4

2 release files

0.37.3

2 release files

0.37.2

2 release files

0.37.1

2 release files

0.37.0

2 release files

0.36.2

2 release files

0.36.1

2 release files

0.36.0

2 release files

0.35.0

2 release files

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