8 | State Business Tax Climate Index 2024
Mississippi
Under HB 531, enacted in April 2022, Mississippi
converted its graduated-rate individual income tax
to a single-rate tax of 5 percent on taxable income
exceeding $10,000, effective January 1, 2023. The
at rate is scheduled to decrease to 4.7 percent in
2024, 4.4 percent in 2025, and 4 percent in 2026.
These reductions will further improve Mississippi’s
ranking.
Montana
Montana was among the states to enact individual
income tax cuts in 2021, reducing the top marginal
rate from 6.9 percent in 2021 to 6.75 percent in
2022 and scheduling a future reduction, along with
bracket consolidation and other structural reforms,
for 2024. Originally, the 2021 law converted Mon-
tana’s seven marginal rates into two, with rates of
4.7 and 6.5 percent, effective in 2024. However, in
March 2022, S.B. 121 was enacted, reducing the
top marginal rate even further—to 5.9 percent—be-
ginning in 2024. Although the lowest rate will rise
to 4.7 percent in 2024, conforming to the federal
standard deduction in 2025 will yield tax savings
for lower-income taxpayers. This law also dou-
bles the bracket widths for married lers, thereby
removing the marriage penalty that currently exists
in the state’s income tax code. These reforms will
yield a favorable ranking change.
Nebraska
Nebraska has taken strides to improve its tax
competitiveness in recent years and continued that
work in 2023 by accelerating previously enacted
individual and corporate income tax rate cuts and
reducing rates further than originally planned. Leg-
islative Bill 754, enacted in May 2023, will gradually
phase down Nebraska’s top marginal individual
and corporate income tax rates to 3.99 percent in
2027, with initial reductions of both top marginal
rates to 5.84 percent in 2024, reaching that target
rate three years earlier than initially anticipated.
This new law also converts Nebraska’s graduat-
ed-rate corporate income tax into a single-rate tax
in 2025 and consolidates Nebraska’s four marginal
individual income tax rates into three starting in
2026. Assuming these reforms proceed as sched-
uled, Nebraska’s corporate and individual tax com-
ponent scores will continue to improve.
New Hampshire
Senate Bill 189, enacted in July 2023, decouples
New Hampshire from the business net interest lim-
itation under IRC Section 163(j), thereby allowing
businesses to fully deduct their interest expenses
in the year those expenses are incurred, effective
January 1, 2024. Thischanges will improve New
Hampshire’s score on the corporate tax compo-
nent. Additionally, the state budget (H.B. 2), enact-
ed in June 2023, accelerates the phaseout of New
Hampshire’s tax on interest and dividends income,
eliminating the tax by January 2025, rather than
2027. This will improve New Hampshire’s score on
the individual tax component.
New Jersey
Assembly Bill 5323, enacted in July 2023, made
several changes to New Jersey’s corporate income
tax code, including reducing the taxation of GILTI
from 50 to 5 percent, effective for privilege periods
ending on or after July 31, 2023. This change will
help New Jersey’s corporate tax component score
in the future. However, that same law will also new-
ly conform New Jersey to the 80 percent federal
limitation on NOL carryforwards without adopting
a corresponding unlimited recovery period in-
cluded in federal law. Additionally, New Jersey’s
2.5 percent corporation business tax surcharge
is scheduled to expire at the end of 2023, which
would result in the reduction of New Jersey’s top
marginal corporate income tax rate from 11.5 to 9
percent. If the surcharge is indeed allowed to ex-
pire, New Jersey’s corporate tax component score
will improve in the future.