The UK's only open-source static tax-benefit microsimulation model.
active 2025-01-09 → 2026-07-23 (UTC)
Activity over time
Daily event counts in the loaded window
Line chart, 561 days from 2025-01-09 to 2026-07-23. Pushes: 703 total, peak 38 in a day. Pull requests: 218 total, peak 12 in a day. Issues: 220 total, peak 27 in a day. Comments: 215 total, peak 21 in a day. Stars: 4 total, peak 1 in a day.
- Pushes
- Pull requests
- Issues
- Comments
- Stars
Stars, PRs, issues and forks are under-captured in the later part of this window. GH Archive progressively stopped capturing non-push events during 2026 — −95% or worse by the end of the window. Every series here except Pushes fades for that reason, so a decline above reflects the archive, not this repository. Pushes stay reliable throughout, so read them, and the contributor counts derived from them, as the real signal. Data health has the measurements.
Top contributors
Pushes, PRs, issues, reviews and comments — stars and forks excluded, so this is contribution rather than popularity
| Contributor | Contributions | Pushes | PRs | Comments |
|---|---|---|---|---|
| nikhilwoodruff | 435 | 193 | 72 | 43 |
| MaxGhenis | 421 | 248 | 54 | 63 |
| vahid-ahmadi | 168 | 94 | 31 | 18 |
| policyengine[bot] | 104 | 17 | 27 | 33 |
| github-actions[bot] | 57 | 57 | 0 | 0 |
| nwoodruff-co | 39 | 22 | 4 | 6 |
| PavelMakarchuk | 25 | 2 | 2 | 15 |
| janton10 | 23 | 10 | 4 | 4 |
| dependabot[bot] | 12 | 8 | 4 | 0 |
| juaristi22 | 12 | 5 | 2 | 1 |
| anth-volk | 10 | 5 | 2 | 0 |
| Copilot | 2 | 0 | 0 | 0 |
| vatfix | 1 | 0 | 0 | 1 |
| daphnehanse11 | 1 | 0 | 0 | 0 |
| nadamakram | 1 | 0 | 0 | 1 |
Recent activity
Latest issues, pull requests and releases
- Pull request#1802dependabot[bot]2026-07-23 09:58
- Pull request#1774MaxGhenis2026-06-07 01:49
- Issue#1762MaxGhenis2026-06-05 16:08Fix Carer Support Payment 2026 parameter dates and Scottish Carer Supplement history
- Issue#1742MaxGhenis2026-05-30 01:37Update 2026-27 Pension Credit additional amounts
- Issue#1739MaxGhenis2026-05-30 01:14Update 2026-27 Child Benefit rates
- Pull request#1690MaxGhenis2026-05-23 12:06
- Issue#1688MaxGhenis2026-05-23 07:38Update Child Benefit parameters to published 2026-27 rates
- Issue#1685MaxGhenis2026-05-23 02:31PolicyBench audit: income_tax may tax savings/dividends at ordinary rates in some cases
- Pull request#1675MaxGhenis2026-05-14 23:51
- Pull request#1661vahid-ahmadi2026-05-06 10:46
- Issue comment#1640MaxGhenis2026-05-02 03:03Remove pass-through allowance variables (#414)
- Pull request#1646MaxGhenis2026-04-25 13:42
- Pull request#1641vahid-ahmadi2026-04-21 11:01
- Issue#258vahid-ahmadi2026-04-21 10:36Rename `revenue` to `revenue_effect` in parameter tests
- Issue#953MaxGhenis2026-04-20 11:24Ensure triple lock matches March OBR forecasts exactly
- Issue#856vahid-ahmadi2026-04-20 09:17Add hours worked LSR
- Issue#1632MaxGhenis2026-04-18 00:32State pension undershoot: -£12bn vs OBR, ASP/Protected Payment under-captured
- Issue#395MaxGhenis2026-04-17 23:42Add parameter for marriage allowance-eligible tax bands
- Issue#420MaxGhenis2026-04-17 23:42Specify `carer_premium` logic for >2 carers
- Pull request#1623vahid-ahmadi2026-04-17 23:42
- Issue#1005MaxGhenis2026-04-17 23:42Add eligibility questions for childcare programs
- Pull request#1622vahid-ahmadi2026-04-17 23:42
- Pull request#1629MaxGhenis2026-04-17 23:04
- Issue comment#422vahid-ahmadi2026-04-17 11:43`test_validity.py::test_not_nan` throwing `RuntimeWarning: invalid value encountered in true_divide`
- Issue#457vahid-ahmadi2026-04-17 11:43Charitable contributions
Totals cover only the window loaded into ClickHouse and count events, not GitHub's lifetime totals — 4 stars here means stars gained during the window, not the repo's star count.