PolicyEngine/policyengine-us

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The PolicyEngine US Python package contains a rules engine of the US tax-benefit system, and microdata generation for microsimulation analysis.

Stars: 163
Forks: 213
Open beginner issues: 17
Indexed issues: 747
Avg merge: 3d 4h
Merged PRs (30d): 92

Dominant language: Python
License: AGPL-3.0
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 16, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

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741 open issues indexed

Kentucky SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9273 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Atomic inputs: one fact, one input — eliminate arbitration between redundant input variables Open

PolicyEngine/policyengine-us#9275 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Atomic inputs: consolidate the heating/utility expense input family (LIHEAP, SNAP SUA, CA utility programs) Open

PolicyEngine/policyengine-us#9284 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
CO CCAP and NC SCCA have no activity test: any low-income family with an age-eligible child qualifies Open

PolicyEngine/policyengine-us#9289 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
NIIT source list omits passive partnership/S-corp and estate income (section 1411(c)(1)(A)(ii)) Open

PolicyEngine/policyengine-us#9304 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Hawaii itemized state-tax deduction ignores the federal-AGI disallowance threshold Open

PolicyEngine/policyengine-us#9327 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Wisconsin 2025 second-bracket (4.4%) upper thresholds are wrong in all four filing-status schedules Open

PolicyEngine/policyengine-us#9328 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Disconnected disability inputs: repo-wide audit of disability gates vs their legal definitions Open

PolicyEngine/policyengine-us#9330 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
AR Medicaid work requirement misses SSI-criteria disability in medically-frail exemption Open

PolicyEngine/policyengine-us#9335 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
CA WDP and IL HBWD buy-ins omit meets_ssi_disability_criteria; IL worker income test inconsistent Open

PolicyEngine/policyengine-us#9336 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
CO AND-CS state supplement pays people who do not receive SSI Open

PolicyEngine/policyengine-us#9338 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
MA EAEDC SSI-eligibility exclusion lacks the income test (is_ssi_eligible vs uncapped_ssi) Open

PolicyEngine/policyengine-us#9339 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
TANF disability classification gates ignore benefit receipt (MT two-parent, VA TANF-UP, DC resource limit) Open

PolicyEngine/policyengine-us#9340 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
CHIP immigration eligibility does not encode H.R.1 §71109 narrowing (Medicaid side is encoded; CHIP check is only ~undocumented) Open

PolicyEngine/policyengine-us#9346 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
WA WFTC income ceiling ignores permanently and totally disabled adult qualifying children Open

PolicyEngine/policyengine-us#9364 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
UT CCAP: model the October 2026 entry/exit income eligibility tiers (Table 4 groups 6/10/16) Open

PolicyEngine/policyengine-us#9372 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
SNAP: H.R. 1 restriction of the LIHEAP-triggered SUA to elderly or disabled households is not implemented for California Open

PolicyEngine/policyengine-us#9374 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Audit incomplete metadata on container parameters Open

PolicyEngine/policyengine-us#9377 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Lifeline categorical eligibility omits Veterans and Survivors Pension Benefit (47 CFR 54.409(a)(2)) Open

PolicyEngine/policyengine-us#9388 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Federal noncitizen eligibility rules omit the veteran and active-duty exception (8 USC 1612(a)(2)(C), 1612(b)(2)(C), 1613(b)(2)) Open

PolicyEngine/policyengine-us#9389 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Medicare eligibility: add the ESRD and ALS routes; document the SSDI-months input Open

PolicyEngine/policyengine-us#9396 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
ctc_qualifying_children counts children whose filer fails the identification requirement Open

PolicyEngine/policyengine-us#9403 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Medicaid MAGI household: 'living with both parents' proxy pools grandparent income in multigenerational households Open

PolicyEngine/policyengine-us#9404 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
household_state_benefits omits 28 of 51 implemented state child care subsidy variables (child care assistance never reaches net income in those states) Open

PolicyEngine/policyengine-us#9405 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Model federal §530A "Trump accounts" (OBBBA 2025 / Working Families Tax Cuts) Open

PolicyEngine/policyengine-us#9415 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
spm-calculator 1.0.0 breaks policyengine-us imports (No module named 'spm_calculator.geoadj') Open

PolicyEngine/policyengine-us#9442 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
MA CCFA: correct phased income exclusions and related eligibility rules Open

PolicyEngine/policyengine-us#9455 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Declare SPM measurement scope for mixed country datasets Open

PolicyEngine/policyengine-us#9461 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
MA TAFDC: work-expense deduction credited to every member; eligibility test omits the 50% disregard Open

PolicyEngine/policyengine-us#9469 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
NY Basic Health Program: 200–250% FPL tier ended 2026-07-01, parameter keeps it all year Open

PolicyEngine/policyengine-us#9471 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Adults in the Medicaid coverage gap are charged the full benchmark premium Open

PolicyEngine/policyengine-us#9472 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
employer_sponsored_insurance_premiums never reaches medical out-of-pocket Open

PolicyEngine/policyengine-us#9473 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Marketplace enrollees under the filing threshold lose the PTC but keep the premium (tax_unit_is_filer) Open

PolicyEngine/policyengine-us#9479 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Without county_fips, CT/IL and CO/IN share identical benchmark premiums Open

PolicyEngine/policyengine-us#9480 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
State marketplace premium wraps (Covered CT, ConnectorCare, …) not modeled Open

PolicyEngine/policyengine-us#9481 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
ACA applicable percentage uses the contiguous-states poverty guideline for Alaska and Hawaii Open

PolicyEngine/policyengine-us#9482 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Colorado Works applies the applicant needs test to recipients along an earnings axis Open

PolicyEngine/policyengine-us#9484 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Child-care subsidy returns $0 for eligible households in CA, MA, MD, NE (default enum/attendance inputs) Open

PolicyEngine/policyengine-us#9485 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Alabama federal-tax deduction omits Act 2022-37 Part II (as-if-2020 recomputation / greater-of) Open

PolicyEngine/policyengine-us#9487 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
MA CCFA: derive default care provider type from age and date FY2027 informal rates to July 2026 Open

PolicyEngine/policyengine-us#9488 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
PA employer pensions received before age 59.5 are still taxed; Pennsylvania exempts them once plan retirement conditions are met Open

PolicyEngine/policyengine-us#9491 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026

PolicyEngine/policyengine-us

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