HB1731 amends the Illinois Estate and Generation-Skipping Transfer Tax Act and may be cited as the Estate Tax Inflation Law. The bill would update how Illinois calculates estate tax for deaths on or after January 1, 2026 by tying the Illinois exclusion amount to inflation through the Consumer Price Index. It sets an initial indexed exclusion amount of $5.3 million for 2026 and then adjusts that amount annually based on CPI growth beginning in 2027.
The bill also conforms Illinois law more closely to federal estate-tax concepts for surviving spouses. If a taxpayer makes a valid federal election to use a deceased spousal unused exclusion amount, the Illinois exclusion amount would also include the Illinois deceased spousal unused exclusion amount for that spouse. In addition, the bill changes how the State Death Tax Credit is calculated so it applies only to the portion of the adjusted taxable estate that exceeds the Illinois exclusion amount. The measure takes effect immediately, but its operative tax changes begin for decedents dying on or after January 1, 2026.
Impact
HB1731 would amend Section 2 of the Illinois Estate and Generation-Skipping Transfer Tax Act, changing the definitions and formulas used to determine the Illinois estate tax and generation-skipping transfer tax. The practical effect is to raise and index the estate-tax exclusion threshold, potentially reducing estate-tax liability for some estates over time, and to allow portability-like treatment of unused spousal exclusion amounts when a federal election is made. It would also alter the computation of the State Death Tax Credit, which could affect the amount of tax collected by the state and the estates subject to tax.
Sentiment
No committee transcripts or recorded votes were provided, so there is no direct evidence of debate or formal support/opposition in the available materials. Based on the bill text and caption, the measure appears to be framed as a technical tax-threshold adjustment rather than a broad policy overhaul. The sponsor’s title and the inflation-indexing provisions suggest the bill is intended to modernize the estate-tax threshold and align Illinois treatment more closely with federal rules.
Contention
The main points of potential contention are fiscal and policy-related. Supporters would likely view the bill as a fairness and inflation-adjustment measure that prevents bracket creep and helps surviving spouses use unused exclusion amounts. Opponents may focus on the revenue impact, since increasing and indexing the exclusion amount would likely reduce estate-tax receipts and benefit larger estates. The changes to the State Death Tax Credit calculation and the spousal exclusion rules may also draw scrutiny from those concerned about complexity or conformity with federal estate-tax elections.