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 3h
Merged PRs (30d): 96

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

DC SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#8988 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Delaware SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#8989 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Document the HoH/surviving-spouse exception to the NJ CTC joint-return requirement in nj_ctc_eligible Open

PolicyEngine/policyengine-us#9002 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Refactor CA CalWORKs variables from YEAR to MONTH so July COLAs take effect mid-year Open

PolicyEngine/policyengine-us#9033 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
California SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9035 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Alaska SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9038 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Oregon SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9042 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
CA: parameter reference housekeeping (404 links, mislabeled years, $1 boundary convention) Open

PolicyEngine/policyengine-us#9050 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Enums under axes-based simulations do not appear to be decoded (returned as numeric indices) Open

PolicyEngine/policyengine-us#9053 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a general court-supervision input variable Open

PolicyEngine/policyengine-us#9055 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Wyoming SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9066 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Uprating-index parameters are app-exposed household reform controls with no effect after #9077 Open

PolicyEngine/policyengine-us#9078 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Utah SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9082 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Texas SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9083 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Encode FY2027 SNAP COLA values when USDA publishes the memo (~August 2026) Open

PolicyEngine/policyengine-us#9089 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
ME TANF maximum benefit and standard of need tables missing the 2025-10-01 COLA Open

PolicyEngine/policyengine-us#9101 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
AK ATAP maximum payment undercounts two-adult assistance units Open

PolicyEngine/policyengine-us#9103 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
NY SNAP: heating/cooling SUA applied when household reports no separate heating costs — intentional? Open

PolicyEngine/policyengine-us#9104 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
get_irs_cpi averages August–July but documents (and IRS practice uses) the 12 months ending August Open

PolicyEngine/policyengine-us#9105 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Migrate partner contract tests to the receipt-vs-eligibility contract (after 4-PR series + partner sign-off) Open

PolicyEngine/policyengine-us#9111 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Massachusetts omits the 2020–2021 qualified unemployment deduction (St. 2021, c. 9, § 26(b); Schedule Y line 9c) Open

PolicyEngine/policyengine-us#9115 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Prevent selective test failures for changed fixture modules Open

PolicyEngine/policyengine-us#9139 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
VT: 2025 Act 71 lets the military retirement exclusion stack with the §5830e(a)-(c) election; model still forces a single max_() choice Open

PolicyEngine/policyengine-us#9146 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
2026 QBID applies the §199A(i) $400 minimum to all QBI, not active-business QBI Open

PolicyEngine/policyengine-us#9150 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
NY state tax model missing addition modification for post-2018 alimony received Open

PolicyEngine/policyengine-us#9153 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
SNAP excludes a lone minor household head's earnings — 7 CFR 273.9(c)(7) parental-control condition not modeled Open

PolicyEngine/policyengine-us#9157 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
EITC falls below the published maximum at exact earned-income-amount endpoints Open

PolicyEngine/policyengine-us#9161 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
SALT: simulation taxable-income ceiling makes salt_deduction diverge from the §164(b)(7) amount at low AGI Open

PolicyEngine/policyengine-us#9167 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
SALT cap phaseout uses AGI instead of §164(b)(7)(B)(iv) modified AGI (§§911/931/933 addbacks) Open

PolicyEngine/policyengine-us#9168 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
SALT sources omit state and local personal property taxes (§164(a)(2)) Open

PolicyEngine/policyengine-us#9169 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
§68 limitation base uses an AGI-minus-exemptions proxy instead of taxable income determined without §68 Open

PolicyEngine/policyengine-us#9170 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
§68 reduction uses a truncated 2/37 rate and float32 rounding Open

PolicyEngine/policyengine-us#9171 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
California BBCE applies a net-income eligibility test that CDSS waives (net_applies[CA] should be false) Open

PolicyEngine/policyengine-us#9175 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
California BBCE gross screen: derived FPG ratio rejects households inside the published CDSS monthly limit Open

PolicyEngine/policyengine-us#9176 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Maryland TCA grant standard outdated: FIA IM 26-13 (effective 2026-01-01) values not applied Open

PolicyEngine/policyengine-us#9181 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Tennessee children's Medicaid income limits stored as flat 216% FPL for all age bands Open

PolicyEngine/policyengine-us#9182 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
New Hampshire SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9190 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
13 TANF-linkage formulas should read cycle-safe computed state enrollment, not the reported is_tanf_enrolled input Open

PolicyEngine/policyengine-us#9205 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
receives_medicaid consumer corrections: IL BCC should read eligibility, IL FPP computed enrollment, CA freeze needs prior-year continuity Open

PolicyEngine/policyengine-us#9206 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
VT: §5830e(c) other-contributory retirement exclusion is unmodeled — the (a)-(c) election only sees Social Security and CSRS Open

PolicyEngine/policyengine-us#9207 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Model Virginia state premium subsidy (138–250% FPL, starts PY2027 — watch list) Open

aca-subsidy enhancement medicaid states/va

PolicyEngine/policyengine-us#9228 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Decide whether md_local_eitc belongs in the state EITC aggregator (taxsim_state_eitc) Open

PolicyEngine/policyengine-us#9235 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Nebraska SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9238 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Maryland SSP 2017, 2018, 2019 Open

PolicyEngine/policyengine-us#9253 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Decide whether SNAP BBCE limits should follow per-state published chart conventions Open

PolicyEngine/policyengine-us#9255 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
commodity_supplemental_food_program pays every computed-eligible person — no take-up gate exists; same phantom class as #9192 Open

PolicyEngine/policyengine-us#9260 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Federal ACA PTC income gate zeroes the credit at [400%, 401%) FPL (truncation boundary vs Form 8962) Open

PolicyEngine/policyengine-us#9264 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Model New Mexico Puente Health premium backfill for lawfully-present non-citizens (esp. PY2027 ≤400% FPL) Open

PolicyEngine/policyengine-us#9265 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Model New Mexico Native American premium enhancements (MAP Table 2 tribal schedule + Premium Buy-down) Open

PolicyEngine/policyengine-us#9266 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
SC and AK CCAP pool per-child provider rate caps before the lesser-of comparison Open

PolicyEngine/policyengine-us#9269 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026

PolicyEngine/policyengine-us

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